Chess Room Newsletter #859

Newsletter #859

February 8, 2019

It is hard to fail, but it is worse never to have tried to succeed. In this life we get nothing save by effort.

Theodore Roosevelt

NEW Format for Spring TNM Beginning March 19

The Mechanics’ Institute Chess Club Tuesday Night Marathon has a rich and historic tradition. Having begun in the 1970’s under Director Ray Conway, it continued to its present day under the direction of John Donaldson. On March 19, we will be offering a new format that I think will bring excitement and energy to the games and create opportunities that are beneficial for both the club and players. I will discuss the new format, and then provide the rationale for the changes.

3 Section Tournament

The TNM will be divided into 3 sections, a Premier, 1600+ and under 1600.

• TNM Premier Section: The Premier Section will be its own section consisting of the 12 highest rated players registered. Players do have the option to decline entry and play in the 1600+section, but they will have to choose that at time of entry. We will use the March USCF supplemental rating to determine rating. This section would also have its own prize pool of 1st, 2nd, and 3rd and will be higher than the payout for the 1600+ section. This will not be a round robin, in order to account for possible absences.
• 1600+: The next section will be players rated 1600 and above. Players that are rated 1400-1599 may choose to play up into this section with an additional $20 fee, which will be contributed to the prize pool. The top 2 finishers in this section will qualify to automatically play in the next TNM Premier section as part of the 12-player field.
• Under 1600: All players rated below 1600 and unrated would play in this section.

I feel this format is beneficial for all players at every level. The Premier section pits players have high similar strength against each other, attracting stronger players and providing the opportunity for significant rating gain and competition. We will also be live broadcasting games on our Twitch channel, with live commentary by FM Paul Whitehead and other special guests. These high quality games and our Mechanics' Chess Club personalities will provide great content for our viewers.

For the 1600+ section, it would create a strong field of players, which may still include some strong 2000+ rated players who decline to enter the Premier section. Also, there is incentive in performing well, as the top 2 players guarantee a spot into the Premier section of the next TNM. Also, by allowing a play up option, players rated 1400-1600 may still compete in the stronger section, and they contribute to a larger prize pool in doing so.

For the under 1600 section, it allows players to have greater parity in their matches, allowing for more competitive games and opportunity for growth.

This is a change, but one that I think will be great for the marathon and the club. We will work hard to see how everything goes, make adjustments where needed, and continue to provide a quality experience at the club. Everything we do is meant to elevate the club, protect the integrity of the game, and make the Mechanics’ Institute Chess Club the premier place to play and hold events. Thank you all for your feedback, support, and willingness to share in the excitement of daring to go in a new direction together.

Abel Talamantez
Director, Mechanics’ Institute Chess Club

Additional Rule Modifications for TNM

Pairings

We want to protect the integrity of the game and integrity of the pairings. We will continue to post tentative pairings on Monday at noon, but they are definitely tentative. A final pairing will be posted on site at 6:15pm on Tuesday. Because there are often so many changes and cancellations that occur between that Monday and Tuesday, re-pairing is the best way to ensure color schemes and score groups are properly accounted for.

No-Shows

Any no show will be treated as a forfeit loss and that player will be withdrawn from the tournament. Please respect the time of the players and the tournament directors in this regard.

Extra-rated games

Additional games played on site due to a no-show or opponent cancelling will be treated as an extra rated game. This means that the game played will not count towards the TNM score, as you will be given a forfeit win, but will be a USCF extra rated game. Extra rated games may also be played on site outside of the TNM with TD approval.

We will have a flyer ready shortly, but this will be the format for the next TNM. It is an experiment of sorts based on the feedback I have received, and I think favors both the players, in creating more competition, and the club, in that we will be able to broadcast strong competition with exciting energy. As with any new thing we try, we will evaluate the successes and challenges and make any adjustments. Your feedback is very valuable, so please do not hesitate to reach out to us and let us know what you think.

Big News for California Chess History!!

We just received word that through the extensive work of MI Library Director Deb Hunt, MI Archivist Diane Lai, John Donaldson, Kerry Lawless and many others, we were able to have digitized the following print/bound newsletters of The California Chess Journal (10 volumes, 1986-2004), The California Chess Reporter (25 volumes, 1951-1976, plus 4 supplements), The Chess Reporter/North American Chess Reporter (1 volume plus 4 separate booklets, 1931-1933), and The Chess Voice (10 volumes, 1968-1985). These newsletters will be professionally digitized to ensure long-term preservation and online access through the Internet Archive, the Digital Public Library of America (DPLA), WorldCat, and Calisphere. In addition, the following newsletters that have been digitized previously by chessdryad.com will be digitally transferred to the above digital repositories: 1. Chess in Action (1953-1970) 2. California Chess News/Chess Digest (1947-1950). This is big news as it will preserve for posterity a great deal of our California chess history, and is a signal that the state of California recognizes the importance and cultural significance of chess. A big shout out to everyone involved for their laborious efforts and commitment to the history of chess in our community!

Tournament Musings

During the Gross Memorial Championship this past weekend, a round 3 game went to a time scramble with both players under 5 minutes. Although the position shown is not the actual position, it will illustrate the problem that occurred.

In this position, white is in check, but did not realize it. White grabbed the f2 pawn to capture with the bishop, then touched the bishop, and then realized he was in check. What should be done?

I was called to the table and decided to take a systematic approach. Since it was an illegal move, the opponent got an extra 2 minutes on their clock. I added the two minutes on the clock, and then asked what happened, and both gave the same account.

Under USCF rules, since the pawn was grabbed as a motion to capture, the touch-move rule is activated on a piece that can capture that piece touched. In other words, when the h7 pawn was touched by white, white committed to moving a piece that was able to execute the capture, which in this case was only the bishop. However, white was in check. Under USCF rule 10D, grabbing the pawn would commit the player to capturing the pawn, since that was the piece touched. However, doing so would be an illegal move. If only the pawn was touched, then the player would not have had to move it because of the check. But because the bishop was touched, the bishop was committed to moving, and was forced to block the check, resulting in the loss of a piece.

It was a very unfortunate situation for the player, but one I hope many players can learn from.

PRO Chess League Update

San Francisco Mechanics’ Upset Chengdu Pandas for 1st Win!

The SF Mechanics scored their first win of the season and it was a big one, upsetting the Pacific divisions top team the Chengdu Pandas. The big guns were out for the Mechanics, stacking the lineup with 3 GM’s, Shankland, Negi, and Naroditsky, with young phenom NM Rochelle Wu on board 4. The final score was 9.5-6.5, and you can watch a replay of the entire match with commentary by IM David Pruess and FM Andy Lee by following this link: https://www.twitch.tv/videos/376398760##

The Mechanics return next week on Tuesday February 12th against the San Diego Surfers. Match starts at 5:45pm and we will carry the broadcast at MI.

2019 Henry Gross Memorial

IM Ameet Ghasi dominant with a perfect 5-0

The Henry Gross Memorial attracted 51 players and a strong 2000+ field, but they were no match for IM Ameet Ghasi (2505 FIDE) who dominated the competition en route a 5/5 showing. You can see the crosstable for the event by following this link: http://chessclub.org/archive.php?y=2019

Click under club events to find the Gross Memorial. Our next event will be the A.J. Fink Amateur Championship on the weekend of March 2-3, and is for all players rated below 2200. We hope to see many of you there!

Wednesday Night Blitz Update

FM Kyron Griffith won the February 6th edition of the Wednesday Night Blitz with a score of 10.5 points from 12. Second was Expert Carlos Davila with 9, and B player Jeff Sinick with 8 points took Third Place. 13 players participated, and Jules Jelinek ran the event smoothly as usual.

Tony Lama's Teasers

Here is the solution to last week's problem:

Solution:

1. Qa3!! Kb5
2. Kd5 b6
3. Nc3#

This week’s teaser, problem by Kenneth S. Howard in Chess Review 1935:

Friendly Rivalries, Part 1

By FM Paul Whitehead

I was lucky enough to play many strong players in Northern California during the 1970’s and the 1980’s. There was always a Swiss Tournament somewhere, from Santa Rosa down to Monterey, and many fine players would turn up. And one year, 1978, the legendary IM Julio Kaplan showed up out of retirement.

Kaplan was the 1967 Puerto Rican National Champion and played in 4 Olympiads for the Puerto Rican National Team, 3 times on 1st board. But his greatest success was also in 1967, when he won the World Junior Championship in Jerusalem, ahead of Keene, Hubner and Timman. By the mid-seventies Julio had pretty much retired from playing chess and had become a father and a software developer (he founded Heuristic Software Corporation).

But something brought him out of retirement in 1978, and he played some matches for the Berkeley Riots in the Telephone League (those were the analog days, my friend!) and a few tournaments in the Bay Area.

I was lucky to play Julio twice. I found him to be the very nicest person, the picture of a gentleman.

I was also lucky to find him quite rusty, and he was in severe time trouble in both games we played: which only really counted in one game (I swindled him), because in the other I played quite well.

Enjoy.
— Paul Whitehead

(1) Kaplan,Julio P (2480) - Whitehead,Paul A (2332)
Golden Gate Open, San Francisco, 1978

A nice game by Black who played purposefully throughout. 1.c4 g6 2.Nc3 Bg7 3.g3 Nf6 4.Bg2 0-0 5.Nf3 d6 6.0-0 Nc6 7.Rb1 Bf5 8.d3 Qd7 9.Re1 Bh3 10.Bh1 h6 11.b4 Ng4 12.Nd5 e5 13.b5 Nd8 14.d4 c6 15.bxc6 bxc6 16.Nc3 exd4 17.Nxd4 Rc8 18.e3 Re8 19.Bd2 Ne5 20.Qe2 Ne6 21.Nxe6 Bxe6 22.Rb4 a5 23.Ra4 Rb8 24.f4 Bg4 25.Qf1 Rb2 26.Ne4 f5 27.fxe5 fxe4 28.Bc3 Rc2 29.Rc1 Bh3 30.Qe1 Rxc1 31.Qxc1 Rf8 32.Bg2 Bxg2 33.Kxg2 Qg4 34.Qe1 Qf3+ 35.Kg1 h5 36.Rxa5 Bh6 37.Bd2 dxe5 38.Ra3 g5 39.Rb3 h4 40.Rb1 Rd8 41.Bb4 g4 42.Bc5 h3 43.Qf2 Qxf2+ 44.Kxf2 Rd2+ 45.Kg1 Rxa2 46.Rc1 Re2 47.Bb6 Rxe3 48.Rd1

White lost on time in a hopeless position. 0-1

(2) Whitehead,Paul A (2332) - Kaplan,Julio P (2480) [B85]
Berkeley, 1978

White's 16.Bxf6? is a lemon. Black is crushing White until 35...Bb4? (35...Kg7! and it's all over). Two moves later it is all over: for Black this time. 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be2 Be7 7.0-0 0-0 8.Be3 Nc6 9.f4 a6 10.Qe1 Nxd4 11.Bxd4 b5 12.a3 Bb7 13.Qg3 Bc6 14.Rad1 Qc7 15.Kh1 Qb7 16.Bxf6 Bxf6 17.e5 dxe5 18.fxe5 Be7 19.Bd3 Rad8 20.Rf4 g6 21.Rdf1 Qc7 22.Rg4 Kh8 23.Ne2 f5 24.Rd4 g5 25.c3 Bd5 26.a4 Qb7 27.axb5 axb5 28.b4 h5 29.Rg1 Rf7 30.Qe1 f4 31.Bg6 Rg7 32.Bxh5 Rh7 33.Bg4 Rh4 34.h3 Rxg4 35.hxg4 Bxb4 36.Nxf4 Qh7+ 37.Nh5 Bc5 38.Qf2 b4 39.Qf6+ Kg8 40.Qxd8+

1-0

GM Nick de Firmian's Endgame Lab

Vladimir Kramnik, the 14th World Chess Champion, retired at the end of January after 30 years of top-level chess. He will long be remembered for beating Kasparov for the title in 2000 in a match where he didn’t lose a single game. During that match he made excellent use of the Berlin Defense to the Ruy Lopez, reaching an ending right out of the opening, which he held time and again against Kasparov’s herculean efforts to break him. Yet the most important endgame of Kramnik’s career came in a different match – the 2004 title match against the super solid Peter Leko. After 13 games Leko there had been 12 draws and one victory for Leko. Kramnik desperately needed to win the final 14th game to retain his title. To the surprise of many Kramnik traded into an endgame on move 16. A small edge in an endgame against the immovable Peter Leko seemed to offer little hope, but Kramnik showed himself the master of controlled aggression.

(2) Kramnik,Vladimir (2770) - Leko,Peter (2741) [B12]
World-ch Kramnik-Leko +2-2=10 Brissago (14), 18.10.2004

1.e4 c6 2.d4 d5 3.e5 Bf5 4.h4 h6 5.g4 Bd7 6.Nd2 c5 7.dxc5 e6 8.Nb3 Bxc5 9.Nxc5 Qa5+ 10.c3 Qxc5 11.Nf3 Ne7 12.Bd3 Nbc6 13.Be3 Qa5 14.Qd2 Ng6 15.Bd4 Nxd4 16.cxd4 Qxd2+ 17.Kxd2

After an unbalanced opening we have reached an ending where White has a slight advantage due to the advanced pawn on e5 and the better biship. Still, Black has a solid position which is difficult to crack. 17...Nf4 18.Rac1 h5 19.Rhg1

Kramnik plays for development and open lines, even in the ending. He is not afraid to trade the white bishop for the knight and get good knight against bad bishop. 19...Bc6 20.gxh5 Nxh5 21.b4 a6 22.a4!

A superb active move by Kramnik, offering a pawn sacrifice for active play. Leko should probably take the pawn, though White is very active after 22...Bax4 23 Rc7 Bb5 24 Bb1!. Refusing to take the pawn leaves White with a queenside wedge. 22...Kd8?! 23.Ng5 Be8 24.b5 Nf4?! 25.b6!

Now Black is in serious trouble due this this advanced pawn. The control of the black squares and the powerful threat of Rc7 is hard to deal with. 25...Nxd3 26.Kxd3 Rc8 27.Rxc8+ Kxc8 28.Rc1+ Bc6 29.Nxf7 Rxh4 30.Nd6+ Kd8 31.Rg1

Pawns are even, but White is now having fun. The white knight is far superior to the black bishop. The activity of the white rook is the last element needed. 31...Rh3+ 32.Ke2 Ra3 33.Rxg7 Rxa4

34.f4! Beatifully played! Kramnik again plays with great energy and offers another pawn. Now 34...Rxd4 35. f5 exf5 36. e6 is decisive. Black could try 36...Re4+ 37. Nxe4 fxe4 38. Rc7! (threatening 39. Rxc6) Bb5+ 40. Ke3, but there is no hope there either. 34...Ra2+ 35.Kf3 Ra3+ 36.Kg4 Rd3 37.f5! Rxd4+ 38.Kg5 exf5 39.Kf6 Rg4 40.Rc7 Rh4 41.Nf7+

Here Leko gave up as 41...Ke8 42. Rc8+ Kd7 43. Rd8 is mate! With the powerful endgame masterpiece Kramnik retained his title of World Champion. 1-0

TNM Games Round 5

Annotations by IM Elliott Winslow

(18452) Diaz,Conrado (2343) - Ivanov,Aleksandr (2171) [D02]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.1), 05.02.2019
[Winslow,Elliott]

1.d4 d5 2.Bf4 e6 3.e3 Nf6 4.Nd2 c5 5.c3 Nc6 6.Ngf3 Bd6 7.Bg3 0-0 8.Bd3 b6 9.Ne5 Bb7 10.Nxc6 Bxc6 11.0-0 Qc7 12.Bxd6 Qxd6 13.f4 Ne4 14.Qc2 Nxd2 15.Qxd2 f5 [15...c4] 16.Rf3 Rf7 17.Rh3 c4 18.Bc2 b5 19.g4 g6 20.g5 a5 21.Rh6 Rg7 [21...b4=] 22.h4 Raa7 [22...b4] 23.h5 Be8 24.hxg6 Bxg6 25.Bd1 Qe7?! [25...Rgb7+/=] 26.Kf2 Rb7 27.a3 Qf7 28.Bf3 Qe8 29.Rah1 Qb8 30.Bh5 Bxh5 31.R6xh5 b4?! 32.axb4 axb4 33.Kf3 bxc3 34.bxc3 Rb2 35.Qc1 Qb3 [35...Rgb7+/-] 36.R5h2 [36.Rh6+-] 36...Rb7 37.g6 Rxh2 38.Rxh2 hxg6 39.Qh1 Rg7 40.Rh8+ Kf7 41.Qa1 Qb7 42.Ra8 Kf6 43.Qa3 Re7 44.Qa1 Rh7 45.Qa3 Re7 46.Qa1 Rh7 47.Qa5 Rc7 48.Rf8+ Kg7 49.Re8 Re7 50.Ra8 Rc7 51.Kg3 Rd7 52.Qa4 Re7 53.Qa3 Kf7 54.Qa5 Qb1 55.Qd8 1/2-1/2

(18453) Walder,Michael (1970) - Winslow,Elliott (2318) [B07]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.2), 05.02.2019
[Winslow,Elliott]

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Bg5 c6 5.Qd2 Nbd7 [5...b5 6.e5! b4 7.exf6 bxc3 8.Qxc3 exf6 9.Bf4! Bg7 10.0-0-0 0-0 11.Qg3] 6.Bh6 Curiously not in Marin's book -- and only played seven times. [6.f4 d5! 7.e5 Ne4! 8.Nxe4 dxe4 9.Qe3 f6 10.exf6 exf6 11.Qxe4+ Kf7 12.Bh4 Bb4+ 13.Kf2 Nb6; 6.Nf3 h6! (6...Bg7 7.e5 dxe5 8.dxe5 Ng4 9.e6) 7.Bf4 g5 8.Bg3 Nh5 9.0-0-0 Qa5 10.Bc4 g4 11.Ne2] 6...Bxh6 7.Qxh6 e5 [7...Qa5 8.Qd2 (8.Bd3 c5 9.Nge2 cxd4 10.Nxd4 Qb6 11.Qe3 Qxb2 12.Kd2 Qb6 13.f3 a6 14.Rab1 Qc5 15.a4 0-0 16.h4 h5 17.Nb3 Qxe3+ 18.Kxe3 b6 19.Nd2 Ra7 20.Nc4 Rc7 21.Kd2 Bb7 22.Nxb6 Nxb6 23.Rxb6 Nd7 24.Rb4 Nc5 25.a5 Rfc8 26.Rhb1 Nxd3 27.cxd3 Rxc3 28.Rxb7 Rc2+ 29.Ke3 e5 30.Rb8 Rxb8 31.Rxb8+ Kg7 32.Rb6 Rxg2 33.Rxa6 Ra2 34.f4 Rh2 35.Rxd6 exf4+ 36.Kxf4 Rxh4+ 37.Kf3 Rh1 38.e5 Rf1+ 39.Kg3 ½-½ (39) Tolnai,T (2490)-McNab,C (2475) Norresundby 1992; 8.0-0-0 b5 9.e5 dxe5 10.dxe5 Nxe5 11.Qf4 b4 12.Ne4 Nxe4 13.Qxe4 Bf5 14.Qe3 0-0 15.Re1 Ng4 16.Qxe7 Qxa2 17.Qxb4 Rab8 18.Qc3 Rfd8 19.b3 Qa3+ 20.Qb2 Qxb2+ 21.Kxb2 Nxf2 22.Bc4 Nxh1 0-1 (22) Tonel,G (2001)-Correa,J (1928) Chotowa 2010) 8...b5 9.Bd3 Bb7 10.Nf3 a6 11.0-0 c5 12.dxc5 b4 13.Ne2 Qxc5 14.Ng3 h5 15.Rfe1 h4 16.Nf1 h3 17.g3 d5 18.e5 Ne4 19.Bxe4 dxe4 20.Rad1 0-0-0 21.Ng5 Nxe5 22.Qf4 Rxd1 23.Rxd1 f6 24.Nxe4 Qc6 25.Re1 g5 26.Qe3 Qxe4 0-1 (26) Szabo,G (2398)-Manolache,M (2426) Bucharest 2001] 8.0-0-0 Qe7 9.f3 b5 10.d5 b4 11.Na4 cxd5 12.exd5 Bb7 13.Bc4 Rc8 14.b3 Nb6 15.Nxb6 axb6 16.Nh3 Rc5 17.Nf2 Bxd5 18.Bxd5 Rxd5 19.Rxd5 Nxd5 20.Ne4 f5 21.Rd1 fxe4 22.Rxd5 exf3 23.gxf3 Rf8 24.Qd2 Rxf3 25.Rxd6 Rf1+ 26.Kb2 Rf6 27.Rxf6 Qxf6 28.Qxb4 e4+ 29.Qc3 Ke7 30.a4 h5 31.Qxf6+ Kxf6 32.b4 Ke5 33.a5 bxa5 34.bxa5 Kd6 35.Kc3 Kc5 36.a6 Kb6 37.Kd4 Kxa6 38.Kxe4 Kb5 39.h4 Kc4 40.Kf4 1-0

(18454) Tsodikova,Natalya (2185) - Drane,Robert (1800) [B22]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.3), 05.02.2019
[Winslow,Elliott]

1.e4 Nf6 2.e5 Nd5 3.Bc4 Nb6 4.Bb3 c5 5.c3 Nc6 6.Nf3 d5 7.d4 cxd4 8.cxd4 Bg4 9.Be3 e6 10.Nc3 Be7 11.0-0 0-0 12.Ne2?! f6! 13.exf6 Bxf6-/+ 14.Ng3 Bh4 15.h3 Bxf3 16.gxf3 e5 17.dxe5 Nxe5 18.Bxb6 Qxb6! 19.Qxd5+ Kh8 20.Qxe5 Rae8 21.Qh5 Bxg3 22.Qg4 [22.Rac1] 22...Bb8 23.Rfe1 Qd6 24.f4 Qxf4 25.Qxf4 Bxf4 26.Rxe8 Rxe8 27.Rd1 Be5 28.Bf7 Rb8 29.b3 h6 30.h4 g5 31.h5 Kg7 32.Rd7 Kf6 33.Bd5 Rh8?? 1-0

(18455) Clemens,Kristian (2002) - Gaffagan,Steven (2054) [E92]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.4), 05.02.2019
[Winslow,Elliott]

1.Nf3 Nf6 2.d4 g6 3.c4 Bg7 4.Nc3 0-0 5.e4 d6 6.Be2 e5 7.d5 a5 8.Bg5 h6 9.Bh4 Na6 10.Nd2 Nc5 11.0-0 Bd7 12.b3 Qe8 13.a3 h5 14.b4 Na4 15.Qc2 Nxc3 16.Qxc3 Nh7 17.f3 f5 18.c5 g5 19.Bf2 axb4 20.axb4 Rxa1 21.Rxa1 g4 22.cxd6 [22.fxg4! fxg4 (22...fxe4 23.cxd6 cxd6 24.Nc4) 23.c6! bxc6 24.dxc6 Be6 25.Ra7 Qf7 26.Bb6] 22...cxd6 23.Qc7 [23.fxg4 fxg4; 23.Qc7 Bb5 24.Bxb5 Qxb5 25.Qxd6 Qd3 26.Nf1 gxf3=] 1/2-1/2

(18456) Anderson,Michael (1903) - Kuczek,Kevin W (2003) [C45]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.5), 05.02.2019
[Winslow,Elliott]

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Nxc6 Qf6 6.Qd2 dxc6 7.Nc3 Be6 8.Na4 Rd8 9.Bd3 Be7 10.0-0 Qd4 11.Qa5 b5 12.Nc3 Qb6 13.Qxb6 cxb6 14.e5 f6 15.Be4 Rc8 16.Bf4 b4 17.Ne2 g5 18.exf6 Bxf6 19.Bd2 c5 20.f4 Bc4 21.Rae1 Ne7 22.b3 Bxe2 23.Rxe2 gxf4 24.Bxf4 0-0 25.Bd6 Rfe8 Anderson's scoresheet (none from Kuczek) is unreadable. 34 moves or so. 1/2-1/2

(18457) Tamondong,Cesar B (1608) - Askin,Michael (1993) [A11]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.6), 05.02.2019

1.d4 d5 2.c4 c6 3.Qc2 Nf6 4.Nf3 g6 5.g3 Bg7 6.Bg2 0-0 7.0-0 Bf5 8.Qb3 Qb6 9.Qxb6 axb6 10.Nbd2 Ne4 11.cxd5 cxd5 12.e3 Nc6 13.a3 Nb4 14.Nxe4 Bxe4 15.Bd2 Nc6 16.Rac1 Rfc8 17.Nh4 Bxg2 18.Nxg2 Na5 19.Bb4 e6 20.Nf4 Bf8 21.Nd3 Nb3 22.Rxc8 Rxc8 23.Bxf8 Kxf8 24.Rb1 Ke7 25.Kg2 Kd6 26.Ne5 f6 27.Nd3 Rc2 28.Rd1 g5 29.g4 Nd2 30.Rc1 Rxc1 31.Nxc1 e5 32.a4 Nc4 33.b3 Nd2 34.Kg3 e4 35.b4 Nc4 36.Ne2 Nb2 37.Nc3 1/2-1/2

(18458) Harris,John (1854) - Wonsever,James (1916) [A20]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.7), 05.02.2019

1.c4 e5 2.g3 Nf6 3.Bg2 c6 4.d4 exd4 5.Qxd4 Bb4+ 6.Nc3 d6 7.Nf3 0-0 8.0-0 Re8 9.e3 Bf5 10.Rd1 Na6 11.a3 Bc5 12.Qd2 Ng4 13.Nd4 Bxd4 14.exd4 Nc7 15.d5 c5 16.b3 Qd7 17.Bb2 Ne5 18.f4 Nd3 19.Bf1 Nxb2 20.Qxb2 Re3 21.Kf2 Rae8 22.Re1 Rxe1 23.Rxe1 Bh3 24.Rxe8+ Nxe8 25.Qe2 Kf8 26.Bg2 Bxg2 27.Kxg2 Nf6 28.h3 a6 29.g4 g6 30.Qe1 Qe8 31.Qxe8+ Kxe8 32.Kf3 h5 33.Ne4 hxg4+ 34.hxg4 Nxe4 1/2-1/2

(18459) Yanofsky,Kevin (1915) - Baker,Nate [D13]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.8), 05.02.2019
[Winslow,Elliott]

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 Bf5?! 5.cxd5 cxd5 6.Qb3 b6 7.e4 dxe4 8.Ne5 Be6 9.Bb5+ Nbd7 10.d5 Bf5 11.Bg5 h6 12.Bh4 g5 13.Bg3 Bg7 14.Nc6 Qc8 15.Qa3 Bf8 16.Ba6 e5 17.Bxc8 Bxa3 18.Bxd7+ Nxd7 19.bxa3 f6 20.Nb5 0-0 21.Ne7+ Kh7 22.Nxf5 h5 23.f3 exf3 24.gxf3 Kg6 25.Ne7+ Kf7 26.Nc6 a6 27.Nd6+ Kg7 28.Ke2 b5 29.Rhb1 Nb6 30.Bf2 Nxd5 31.Rc1 Nf4+ 32.Kf1 g4 33.fxg4 hxg4 34.Ne7 Rad8 35.Rc7 Ne6 36.Nef5+ Kg6 37.Re7 Ng5 38.Rg7+ Kh5 39.Kg2 Ne6 40.Ng3+ Kh4 41.Ndf5# 1-0

(18460) Griffith,Kyron Wa (2458) - Babayan,Gagik (1806) [C45]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.9), 05.02.2019

1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4 exd4 5.Nxd4 d6 6.Nxc6 bxc6 7.Bd3 Be7 8.0-0 0-0 9.h3 a5 10.Re1 Nd7 11.f4 Ba6 12.Bxa6 Rxa6 13.Be3 Bf6 14.Qd3 Ra8 15.Rad1 Qc8 16.Bf2 Qa6 17.e5 Qxd3 18.Rxd3 Be7 19.exd6 Bxd6 20.Ne4 Nf6 21.Nxd6 cxd6 22.Rxd6 Rac8 23.Re5 Nd5 24.g3 f6 25.Ree6 Nb4 26.c3 Nxa2 27.Re1 Rb8 28.Rd2 Rb3 29.Ra1 Nxc3 30.bxc3 Rxc3 31.Rxa5 Kf7 32.Rc5 Rxc5 33.Bxc5 Ra8 34.Rd7+ Kg6 35.g4 h6 36.Rc7 Ra4 37.Bf8 f5 38.Rxg7+ Kf6 39.g5+ hxg5 40.fxg5+ Ke5 41.Re7+ Kf4 42.g6 Kf3 43.Re1 Ra2 44.g7 Rg2+ 45.Kh1 Rg3 46.Rf1+ Ke4 47.Rg1 1-0

(18461) Kim,Andy (1604) - Wong,Russell (2200) [A40]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.10), 05.02.2019

1.d4 g6 2.Nf3 Bg7 3.Bg5 c5 4.e3 Nc6 5.c3 h6 6.Bh4 Qb6 7.Qb3 Na5 8.Qxb6 axb6 9.Nbd2 Nf6 10.Bb5 0-0 11.Ne5 d6 12.Bxf6 Bxf6 13.Nec4 Nxc4 14.Nxc4 Be6 15.a4 Bxc4 16.Bxc4 e6 17.f4 d5 18.Bb5 Bh4+ 19.g3 Be7 20.Kd2 Bd6 21.h4 Kg7 22.Ke2 Bc7 23.Raf1 Rad8 24.Kd2 f6 25.Ke2 Rf7 26.Rf3 Re7 27.Re1 e5 28.Kd2 Bd6 29.dxe5 fxe5 30.Rff1 d4 31.Kc2 Rc7 32.exd4 exf4 33.dxc5 bxc5 34.gxf4 Rf8 35.f5 Rxf5 36.Rxf5 gxf5 37.Re6 Be7 38.h5 Bf6 39.Kd3 Re7 40.Rxe7+ Bxe7 1/2-1/2

(18462) Quang,Danny (1719) - Corper,Adam (2193) [D02]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.11), 05.02.2019

1.d4 d5 2.Bf4 Nf6 3.e3 c5 4.c3 Nc6 5.Bd3 e6 6.Nf3 Nh5 7.Bg3 Be7 8.dxc5 Bxc5 9.Nbd2 Bd7 10.Nb3 Be7 11.Nfd4 g6 12.Nxc6 bxc6 13.Be2 Nxg3 14.hxg3 e5 15.Nd2 Rb8 16.b3 Qa5 17.Qc2 Bf5 18.Bd3 Bxd3 19.Qxd3 Bf6 20.Qc2 Qa6 21.e4 0-0 22.Rb1 Rfd8 23.c4 Bg5 24.exd5 cxd5 25.0-0 Bxd2 26.Qxd2 dxc4 27.Qe2 Rdc8 28.bxc4 Rxb1 29.Rxb1 Qxc4 30.Qxe5 Qxa2 31.Ra1 Qd2 32.g4 Rc1+ 33.Rxc1 Qxc1+ 34.Kh2 Qc8 35.g5 Qd8 36.f4 a5 37.Qb5 h6 38.gxh6 Kh7 39.Qc4 Qe8 40.g4 Kxh6 41.g5+ Kh7 42.Qd3 a4 43.Kg1 Qc8 44.Qf3 Qc1+ 45.Kh2 Qb2+ 46.Kg1 a3 47.f5 Qb1+ 48.Kh2 Qxf5 0-1

(18463) Askin,David Benjamin (2019) - Talamantez,Abel (1621) [D63]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.12), 05.02.2019
[Winslow,Elliott]

1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 0-0 [5...h6 6.Bh4 0-0 (6...Nbd7) ] 6.e3 h6 [6...Nbd7 7.Rc1 h6 so that 8.Bxf6 can be met with 8...Nxf6] 7.Bh4 [7.Bxf6 Bxf6 8.Rc1 is quite a viable system for White] 7...Nbd7 [7...b6; 7...Ne4] 8.Rc1 [8.Bd3 c5!; 8.Qc2 c5! "a 'Professional' equalizing line" (8...c6!? "a complex, combative option") 9.cxd5 (9.Rd1 Qa5!) ; 8.cxd5 Nxd5!] 8...c5! [8...c6!? 9.Bd3! a6!? (9...dxc4 10.Bxc4 Nd5 11.Bg3!+/=) 10.c5! e5! (10...Re8 11.Bg3!) ] 9.cxd5 [9.Bd3 dxc4 10.Bxc4 cxd4 11.exd4 (11.Nxd4 Ne5) 11...a6 12.a4 b5! 13.axb5 Nb6 14.Bd3 axb5 (14...Nfd5!?) 15.Bxb5 Bb7=/+; 9.dxc5 dxc4! 10.Bxc4 Nxc5 11.0-0 a6 12.Nd4 Nfe4 13.Bxe7 Qxe7 14.Qc2 Nxc3 15.Qxc3 Na4 was the classic "something out of nothing" Matlakov - Kramnik, Qatar 2015. 0-1 73.] 9...Nxd5 10.Bxe7 Qxe7? This just drops a pawn. [10...Nxe7! 11.Be2 b6 is what it's about -- Black is fine.] 11.Nxd5 exd5 12.dxc5+/- Nf6N [12...Nxc5 13.Qxd5 (13.Be2 Rd8 14.Nd4 Bd7 15.0-0 Rac8 16.Qd2 b6 17.b4 Ne4 18.Qb2 Rxc1 19.Rxc1 Rc8 20.Rxc8+ Bxc8 21.Qc2 Bb7 22.f3 Nd6 23.Qc3 Ne8 24.Nf5 Qd7 25.Bd3 Kf8 26.b5 Kg8 27.Qa3 g6 28.Nxh6+ Kh7 29.Qf8 Nd6 30.Qg8+ Kxh6 31.Qh8+ Kg5 32.h4# 1-0 (32) Krupenski,J (2413)-Lelumees,B (2172) Tallinn 2017) 13...Ne4 4-0 in Mega. Hmm. 14.a3 Re8 15.Bd3 Nxf2 16.Kxf2 Qxe3+ 17.Kg3 Qb6 18.Rhe1 Be6 19.Qd4 Qb3 20.Bc2 Qb5 21.Re5 Qa6 22.Bd3 1-0 (22) Hole,O (2386)-Ohman,K Oslo 2010] 13.Be2+- Bf5 14.0-0 Rfc8 15.b4 a5 16.a3 axb4 17.axb4 g5?! 18.Nd4 Bd7 19.Qc2 Ne4 20.Bf3 f5 21.Ra1 Qe5 22.Rxa8 Rxa8 23.Bxe4 dxe4 24.Qc4+ Kg7 25.b5 f4 26.c6 bxc6 27.Nxc6 Bxc6 28.bxc6 f3 29.c7 Qf5 30.Rd1 fxg2?! [30...Qg4 31.Qd4+! Kg8 32.Kf1! Qxg2+ 33.Ke1 Qg1+ 34.Kd2 Qxf2+ 35.Kc3 is a crazy computer defense that seems to win 35...Qa2 36.Qc5 Ra3+ 37.Kd4 In fact, Stockfish 10 finds mate in 41 (!!).] 31.Qc3+ Kg6 32.Qc6+ 1-0

(18464) Melville,Cailen (1954) - Xu,Jayden (1619) [A63]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.13), 05.02.2019
[Winslow,Elliott]

1.d4 Nf6 2.c4 e6 3.g3 c5 4.d5 exd5 5.cxd5 d6 6.Nc3 g6 7.Nf3 Bg7 8.Bg2 0-0 9.0-0 a6 10.a4 Nbd7 11.Bf4 [11.Nd2; 11.h3; 11.Re1] 11...Qe7 12.Rb1 Rb8 13.b4 b6 14.bxc5 Nxc5 15.Nd4 Bd7 16.Nc6 Bxc6 17.dxc6 Rfd8 18.Bg5 Rdc8 19.Nd5 Qd8 20.Qc1 Rxc6?? 21.Nxf6+ Bxf6 22.Bxf6 Qxf6 23.Bxc6 Qe6 24.Qe3 d5 25.Qxe6 fxe6 26.Rfc1 Rc8 27.Rxb6 Nxa4 28.Rxa6 1-0

(18465) Malykin,Erika (1628) - Lum,Michael K (1941) [A45]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.14), 05.02.2019

1.d4 Nf6 2.e3 c5 3.d5 d6 4.b3 g6 5.Bb2 Bg7 6.c4 0-0 7.Bd3 Na6 8.Ne2 Nb4 9.Nbc3 e6 10.a3 Nxd3+ 11.Qxd3 e5 12.0-0 Nh5 13.e4 f5 14.Ng3 Nxg3 15.fxg3 Bh6 16.h3 Qe7 17.Rae1 Bd7 18.a4 a5 19.Bc1 Bxc1 20.Rxc1 Qg5 21.h4 Qg4 22.Qf3 h5 23.Rf2 Rf7 24.Nb5 Bxb5 25.cxb5 Qxe4 26.Qxe4 fxe4 27.Re1 Raf8 28.Rxf7 Rxf7 29.Rxe4 b6 30.g4 hxg4 31.Rxg4 Kh7 32.Re4 Kh6 33.Rg4 Rf5 34.Re4 Kg7 35.Rc4 Kf6 36.Re4 Rf4 37.Rxf4+ exf4 38.Kf2 g5 39.Kf3 Kf5 40.g4+ fxg3 41.h5 g4+ 42.Kxg3 Kg5 43.h6 Kxh6 44.Kxg4 Kg6 45.Kf4 Kf6 46.Ke4 Kg5 47.Kd3 Kf5 48.Kc4 Ke4 49.Kc3 Kxd5 50.Kd3 Ke5 51.Ke3 d5 52.Kd3 Kf4 53.Kd2 Ke4 54.Ke2 0-1

(18466) Rudyak,Felix (1892) - Busch,Jonah (1799) [E38]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.15), 05.02.2019
[Winslow,Elliott]

1.d4 e6 2.c4 Nf6 3.Nc3 Bb4 4.Qc2 c5 5.Nf3 [5.dxc5] 5...Nc6 6.dxc5 Qa5 [6...Bxc5; 6...0-0] 7.Bd2 Qxc5 8.a3 [8.e3] 8...Bxc3 9.Bxc3 [9.Qxc3 0-0 10.b4] 9...Qxc4N [9...d5 10.e3 dxc4 11.Nd2 b5 12.Bxf6 gxf6 13.Ne4 Qe7 14.Qc3 Ne5 15.Rd1 0-0 16.f4 Bb7 17.Ng3 Nd3+ 18.Bxd3 cxd3 19.Nh5 e5 20.0-0 Be4 21.fxe5 fxe5 22.Nf6+ 1-0 (22) Oestreich,R-Illgen,H Bad Oeynhausen 1964] 10.e3 Qc5 11.Bd3 [11.b4!] 11...Nd5 [11...e5; 11...Qe7] 12.Bxg7+/- Qxc2 13.Bxc2 Rg8 14.Bh6 f5 [14...b6] 15.0-0 b6 16.e4 fxe4 17.Bxe4 Nf6 18.Bxc6 dxc6 19.Rfe1 c5 20.g3?! [20.Bg5; 20.Rad1!] 20...Bd7? [20...Bb7+/=] 21.Rad1 [21.Bg5! Rf8 22.Ne5 Ba4 23.Re3] 21...0-0-0 22.Bf4 [22.Bg5] 22...Nd5 23.Bg5?? Rdf8-+ 24.Rd3 Bb5 25.Rb3 Bc4 0-1

(18467) McKellar,Daniel (1872) - Agdamag,Samuel Za (1506) [A83]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.16), 05.02.2019
[McKellar,Daniel/Winslow,Elliott]

1.d4 f5 2.Nc3 e6 3.e4 fxe4 4.Nxe4 Nf6 5.Bg5 Be7 6.Bd3 0-0 [6...Nxe4 7.Bxe7 Qxe7 (7...Nxf2 8.Qh5+ Kxe7 9.Qh4+) ] 7.Nxf6+ [7.Ng3] 7...Bxf6 8.Bxf6 Qxf6 9.Qd2 Nc6 10.Nf3 Qf4 11.c3 Qxd2+ 12.Kxd2 a6 13.Rhf1 b5 14.Ng5 g6 15.Rae1 Bb7 16.Ne4 d6 17.f3 [17.Ng5 e5 18.Be4 exd4 19.cxd4] 17...Rae8 18.a3 Kg7 19.h4 "Now Black gets some initiative" (DMcK) 19...e5 20.dxe5 Nxe5 21.Bc2 Nc4+ 22.Kc1 Bd5 23.Rh1 h5 24.Rd1 Bxe4 25.Bxe4 Ne3 26.Rd2 Nc4 [26...Nf5] 27.Rd5 c6 28.Rg5 Ne5 29.g4 d5 [29...hxg4 30.Bxg6 (30.fxg4 Kh6 "and White's play fizzles out" (DMcK)) 30...Nxg6 31.h5 gxf3 32.Rxg6+ Kh7 33.Rxd6] 30.Bxg6 Nxg6 31.gxh5 Rxf3 32.Rhg1 Rf2 33.Rxg6+ Kf7? [33...Kh7 34.R6g2 "may offer better chances for a draw" (DMcK) clear plus White (SF10) (34.Rg7+ Kh6 35.Rg8 Rxg8 36.Rxg8 Kxh5 37.Rh8+) ] 34.Rg7++- Kf6 35.R1g6+ Ke5 36.Rxc6 Ke4 37.Rg4+ Kd3 38.Rg3+ Ke4 39.Rg1 Kd3 40.Rd1+ Ke2 41.Rd2+ Kf1 42.Rxf2+ Kxf2 43.Rf6+ [43.Rxa6] 43...Ke2 44.Rf5 Re4 45.Rxd5 Rxh4 46.Kc2 Ke3 47.Kb3 Rh1 48.a4 bxa4+ 49.Kxa4 Ra1+ 50.Kb4 Ra2 51.b3 Rh2 52.Ka5 Ra2+ 53.Kb6 Rb2 54.b4 Rc2 55.Rc5 Ra2 56.h6 Rh2 57.Rc6 Ra2 58.Rc8 Rg2 59.h7 Rg6+ 60.Rc6 1-0

(18468) Morgan,Jerry (1491) - Pane,Gianluca (1863) [A06]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.17), 05.02.2019
[Winslow,Elliott]

1.f4 c5 2.Nf3 d5 3.e3 Nc6 4.Bb5 Bd7 5.b3 Nf6 6.Bb2 e6 7.0-0 Be7 8.Bxc6 Bxc6 9.Ne5 Qc7 10.d3 0-0 11.Nd2 Nd7 12.Ndf3 f6 13.Nxc6 Qxc6 14.Qe1 b5 15.c4 bxc4 16.dxc4 Nb6 17.Nd2 Rfd8 [17...a5; 17...dxc4 18.Nxc4 Nxc4 19.bxc4 Qe4] 18.Qe2 a5 19.a4 Ra7 20.Qf3 Qe8 21.Qg4 Qf7 22.Rad1 f5 23.Qe2 Bf6 24.Nf3 Rad7 25.Be5 dxc4 26.Bxf6 gxf6 27.bxc4 Rxd1 28.Rxd1 Rxd1+ 29.Qxd1 Nxc4? [29...Qd7=] 30.Qd3 e5 31.fxe5 [31.Nh4!+/-] 31...Nxe5 32.Qd8+ Qf8 33.Qxa5 Qe7 34.Qa8+ Kg7= 35.Nh4 Qd7 36.h3 c4 37.a5?? No good -- White has to get on stopping that c-pawn NOW. [37.Qa5 Qd3 38.Qa7+ Kg8= Perpetual when you want it (38...Kf8 39.Qxh7) ; 37.Qb8 c3 38.Qb1] 37...c3-+ 38.Nxf5+ Qxf5 39.Qb7+ Kg6 40.a6 c2 41.Qc7 Qd3 42.a7 Qxe3+ 43.Kh2 Qf4+ 0-1

(18469) Jensen,Christian (1857) - Carron,Joel (1491) [B27]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.18), 05.02.2019

1.e4 c5 2.Nf3 g6 3.d4 cxd4 4.Qxd4 Nf6 5.e5 Nc6 6.Qa4 Nd5 7.Qe4 Nc7 8.Nc3 Bg7 9.Bf4 0-0 [Relevant: 9...b5 10.0-0-0 b4 11.Nd5 Nxd5 12.Qxd5 e6 13.Qe4 h6 14.h4 Qc7 15.Bb5 Qb6 16.Qc4 Ne7 17.Be3 Qa5 18.Bc5 a6 19.Bxe7 Kxe7 20.Qc5+ Kd8 21.Nd4 Bf8 22.Nc6+ Ke8 23.Qxf8+ Rxf8 24.Nxa5 axb5 25.Nb3 Bb7 26.f3 Rxa2 27.Kb1 Ra7 28.Nc5 Bd5 29.b3 f6 30.exf6 Rxf6 31.Nd3 Ke7 32.Nxb4 Ba8 33.Kb2 Rc7 34.Rd4 Rf5 35.Ra1 Bc6 36.Rad1 Bb7 37.Rg4 g5 38.Rh1 Rcc5 39.Nd3 Karjakin,S (2721)-Guseinov,G (2659) Baku 2009 ½-½ (62)] 10.0-0-0 Ne6 11.Be3 Qc7N [Predecessor: 11...Qa5 12.Rd5 Qc7 13.h4 b6 14.h5 Bb7 15.Bd3 Rfc8 16.hxg6 hxg6 17.Qh4 Nxe5 18.Rxe5 Bxf3 19.Qh7+ Kf8 20.Bh6 Bxh6+ 21.Qxh6+ Ke8 22.Qh8+ Nf8 23.gxf3 Qd6 24.Qg7 e6 25.Rh8 Ke7 26.Nd5+ Ke8 27.Bxg6 fxg6 28.Rxf8+ 1-0 (28) Li,C (2548)-Sande Edreira,J (2342) Pamplona 2007] 12.Be2 a6 13.h4 h5 14.Kb1 b5 15.Nd5 Qa5 16.Nb6 Rb8 17.Nxd7 Bxd7 18.Rxd7 Rbc8 19.Rc1 Nb4 20.a3 Nc6 21.Rb7 Kh7 22.Bb6 Qa4 23.Qxa4 bxa4 24.Bxa6 Rb8 25.Re1 Rxb7 26.Bxb7 Rb8 27.Bxc6 Rxb6 28.Bxa4 Nc5 29.Be8 f6 30.b4 Na4 31.Bxa4 1-0

(18470) Thibault,William (1052) - Hakobyan,Sos (1829) [C02]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.20), 05.02.2019
[Winslow,Elliott]

1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3 Qb6 6.Qc2? [6.Be2; 6.a3; 6.Bd3!? cxd4 7.cxd4 Bd7 (7...Nxd4?? 8.Nxd4 Qxd4 9.Bb5+) 8.0-0 the famous gambit...] 6...Bd7?! [6...cxd4 7.cxd4 Nxd4 8.Nxd4 (8.Qa4+ Nc6 (8...Qc6!?) ) 8...Qxd4 9.Be3!? (9.Bb5+ Kd8 (9...Bd7) ) ] 7.Be3 [7.dxc5!?N Bxc5 8.b4 Be7 (8...Bf8!?) 9.b5 Na5 10.a4 a6 11.Be3 Bc5 12.Bxc5 Qxc5 13.bxa6 bxa6 14.Bd3=] 7...Rc8 8.Qd2 cxd4 9.Bxd4?! Bc5 [9...Nxd4 10.cxd4 h5 11.Be2 g6] 10.Be2?! [10.Bxc5 Qxc5 11.Qg5 Qf8] 10...Bxd4 11.cxd4 Nge7 [11...f6] 12.g4? [12.0-0] 12...h5?! [12...0-0-/+ with ...f6 next] 13.Ng5?? [13.Rg1 hxg4 14.Rxg4] 13...Qxd4 14.f4 Qxd2+ 15.Nxd2 Nd4 16.Bd1 hxg4 17.0-0 f6 18.exf6 gxf6 19.Ngf3 gxf3 20.Nxf3 Nxf3+ 21.Bxf3 Rg8+ 22.Kf2 Rc2+ 23.Ke3 Bb5 24.Rfe1 Nf5# 0-1

(18471) Persidsky,Andre (1814) - Matz,James I (1601) [D53]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.21), 05.02.2019
[Winslow,Elliott]

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 Nbd7 5.Bg5 Be7 6.e3 b6?! 7.cxd5 exd5 8.Qa4 Bb7 9.Ne5 0-0 10.Nc6 Qe8 11.Nxe7+ Qxe7 12.Bd3 [12.Ba6] 12...h6 13.Bh4 g5 14.Bg3 Ne4 15.Bxe4 dxe4 16.Bxc7 Nc5 17.dxc5 Qxc7 18.0-0 [18.cxb6] 18...Qxc5 19.Nxe4 Qe5 20.Nc3 Qf5 21.Rfd1 Rfc8 22.Rd6 Rc5 23.Qd4 Rcc8 24.Rxh6 Kf8 25.Rd1 Qc5

26.Rh8+ Ke7 27.Qd7+ Kf6 28.Rd6+ Kg7 29.Rh7+! 1-0

(18472) Cunningham,Charles (1414) - Lesquillier,Walter (1750) [C55]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.22), 05.02.2019

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Nc3 Bc5 5.a3 d6 6.h3 0-0 7.0-0 Bb6 8.d3 h6 9.Bd2 Qe7 10.Qc1 Nd4 11.Nxd4 Bxd4 12.Nd5 Nxd5 13.Bxd5 c6 14.Ba2 Be6 15.Bxe6 Qxe6 16.c3 Bb6 17.b4 f5 18.Be3 f4 19.Bxb6 axb6 20.f3 b5 21.Qd2 Rfd8 22.d4 Qc4 23.Qa2 Qf7 24.Rfd1 b6 25.dxe5 dxe5 26.Rxd8+ Rxd8 27.Qxf7+ Kxf7 28.Kf1 Rd3 29.Rc1 Re3 30.Kf2 Ke7 31.g3 g5 32.gxf4 gxf4 33.h4 Rd3 1/2-1/2

(18473) Tabatabai,Hadi (1149) - Robeal,Rafik (1716) [C54]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.23), 05.02.2019
[Winslow,Elliott]

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.d3 h6 5.0-0 Nf6 6.h3 d6 7.c3 0-0 8.Re1 a6 9.Be3 b5 10.Bb3 Ba7 11.Qd2 Na5 12.Bxh6?? Nxb3?? [12...gxh6 13.Qxh6 Nxb3 (13...Nh7) ] 13.axb3?? [13.Qg5 g6 14.axb3 Re8 15.Qc1+-] 13...gxh6 14.Qxh6 Nh7-+ 15.h4 Qf6 16.Qxf6 Nxf6 17.d4 Bb7 18.Nbd2 Ng4 19.Nf1 f5 20.Ng3 fxe4 21.Nxe4 Rf4 22.Nfg5 Re8 23.g3 Rf5 24.Rad1 exd4 25.cxd4 d5 26.Nc5 Rxe1+ 27.Rxe1 Bxc5 28.dxc5 Re5 29.Nf3 Rxe1+ 30.Nxe1 d4 31.f3 Ne5 32.Kf2 b4 33.g4 a5 34.Ke2 Kg7 35.g5 Kg6 36.f4 Ba6+ 37.Kd2 Nd7 38.Nd3 Kh5?! [38...Bb7; 38...Bb5; 38...c6] 39.c6 Nf8? [39...Nb8-+] 40.Nc5? [40.f5=] 40...Bb5?! [40...Bc8] 41.Nb7? [41.f5 Bxc6 42.Kd3 Kxh4 43.g6 Bd5 44.Kxd4 Bg8 45.g7 Nh7 46.Ne6=] 41...Ne6 42.f5 Nf4 43.g6 Bxc6 44.Nd8 Bd5 45.g7 Bxb3?? [45...Kh6; 45...Bg8] 46.Nc6?? [46.Ne6+-] 46...Kh6 47.Nxd4 Bg8 48.Ke3 Nd5+ 49.Kf3 Kxg7 50.Kg4 Kf6 51.h5 Bh7 52.h6 Ne3+ 53.Kh5 Nxf5 54.Nxf5 Kxf5 55.b3 Bg8 56.Kh4 Kg6 0-1

(18474) Lintz,Michael - Mays,Jerry L (1700) [A48]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.24), 05.02.2019
[Winslow,Elliott]

1.d4 g6 2.Bf4 d6 3.e3 Bg7 4.Nf3 Nf6 5.Bd3 0-0 6.Nbd2 Nbd7 7.c4 c5 8.0-0 Re8 9.Qb3 e5 10.Bg5 Qb6 11.dxe5 Qxb3 12.axb3 Nxe5 13.Nxe5 Rxe5 14.Bxf6 Bxf6 15.Ne4 Be7 16.Nc3 f5 17.Nd5 Bd8 18.Rfe1 a6 19.e4 fxe4 20.Rxe4 Bf5 21.Rxe5 dxe5 22.Bxf5 gxf5 23.Re1 e4 24.f3 Ba5 25.Re2 exf3 26.gxf3 b5 27.Ne7+ Kf7 28.Nxf5 bxc4 29.bxc4 Rg8+ 30.Rg2 Rxg2+ 31.Kxg2 Ke6 32.Ne3 Bd2 33.Nd5 Ke5 34.Kg3 Kd4 35.b3 a5 36.f4 a4 37.bxa4 Kxc4 38.Ne7 Kb4 39.f5 Bg5 40.Nd5+ Kxa4 41.f6 c4 42.Kg4 Bxf6 43.Nb6+ [43.Nxf6 c3 44.Nd5 c2 45.Nc3+ Kb3 46.Ne2] 43...Kb5 44.Nxc4 Kxc4 45.h4 h5+ 46.Kh3 Kd4 47.Kh2 Ke4 48.Kh1 Kf4 49.Kh2 Kg4 1/2-1/2

(18475) Zeller,William Patrick - Cendejas,Juan (1686) [A52]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.25), 05.02.2019
[Winslow,Elliott]

1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.Nf3 Nc6 5.Bg5 [5.Bf4; 5.e3] 5...Be7 6.Bf4 Bb4+ and it comes to the same thing, the main line. 7.Nc3 [Everybody should know the famous trap: 7.Nbd2 Qe7 8.a3 Ngxe5 9.axb4?? (9.Nxe5 Nxe5 10.e3 Bxd2+ 11.Qxd2 d6+/=) 9...Nd3#] 7...Qe7 [7...Bxc3+ 8.bxc3 Qe7 avoids the game line] 8.Qb3!? [8.Qd5; 8.Rc1!?] 8...d6?!+- [8...Ba5; 8...a5!?] 9.exd6 cxd6 10.e3 Bf5 11.Be2 0-0 12.0-0 Bc5 13.Nd5 Qd7 14.Nd4? Bxd4 15.Bxg4 Bxg4 16.f3 Bh5 [16...Na5+/=] 17.exd4+/- Nxd4?! 18.Qd3 Ne6 19.Bh6? [19.Bxd6!+-] 19...f5 20.Bd2 Bg6 21.Bc3 f4 22.Qd2 Rf5 23.Rfe1 Raf8 24.Rxe6? Qxe6 25.Re1 Re5 26.Bxe5 dxe5 27.Qe2 Re8 28.Nc7?? Qb6+ 0-1

(18476) Roberts,Joseph - Cortinas,Martin A (1666) [B18]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.26), 05.02.2019

1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5 5.Bd3 e6 6.Nf3 Nd7 7.Qe2 Be7 8.0-0 Qc7 9.Be3 Bg6 10.g3 Bxe4 11.Bxe4 Ngf6 12.Bf4 Bd6 13.Bxd6 Qxd6 14.c4 Nxe4 15.Qxe4 Nf6 16.Qe5 Qb4 17.b3 0-0 18.Kg2 a5 19.Qc5 Qxc5 20.dxc5 Ne4 21.Rfd1 Rfd8 22.a3 Nxc5 23.b4 axb4 24.axb4 Ne4 25.Rxd8+ Rxd8 26.Ra7 Rb8 27.Ne5 Nf6 28.g4 g5 29.f3 Kf8 30.Kg3 Ke8 31.h4 h6 32.hxg5 hxg5 33.Kf2 Nd7 34.Nd3 Kd8 35.Ke3 Kc7 36.c5 Rh8 37.Ke4 Rh2 38.Ke3 Nf6 39.Ra3 Nd5+ 40.Kd4 f6 41.Rb3 Re2 42.Nc1 Re1 43.Rb1 Nxb4 44.Rxb4 Rxc1 45.Rb3 Rd1+ 46.Ke4 Rd5 47.Rc3 b6 48.cxb6+ Kxb6 49.Rb3+ Kc7 50.Ra3 c5 51.Rc3 Kc6 52.Ra3 c4 53.Ra8 Kb5 54.Rb8+ Kc5 55.Rc8+ Kb4 56.Rc6 c3 57.Rxe6 Re5+ 58.Rxe5 fxe5 59.Kxe5 c2 60.Kf5 c1Q 61.Kg6 Qf4 62.Kh5 Kc5 63.Kg6 Kd6 0-1

(18477) Casares Jr,Nick (1600) - Baer,Michael A (1488) [C33]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.27), 05.02.2019

1.e4 e5 2.f4 exf4 3.Bc4 Qh4+ 4.Kf1 d6 5.Nf3 Qh6 6.d4 g5 7.h4 Be7 8.Kg1 g4 9.Ng5 Bxg5 10.hxg5 Qxg5 11.Nc3 Be6 12.d5 Bd7 13.Ne2 Qe5 14.Qd3 Nf6 15.Bxf4 Qxb2 16.Kf2 Qb6+ 17.Be3 c5 18.Rab1 Qc7 19.Bg5 Ng8 20.e5 h6 21.e6 fxe6 22.Qg6+ Kf8 23.Bxh6+ Rxh6 24.Rxh6 Nxh6 25.Qxh6+ Ke7 26.Qg5+ Ke8 27.Rh1 e5 28.Rh8+ Kf7 29.Rh7+ 1-0

(18478) Chan,John (1560) - Harris,Clarence (1469) [C44]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.28), 05.02.2019
[Winslow,Elliott]

1.e4 e5 2.Nf3 Nc6 3.c3 d6 4.h3 Nf6 5.d3 Be7 6.Be3 0-0 7.c4 Bd7 8.Nc3 Re8 9.Be2 a6 10.a4 a5 11.g4 Qc8 12.Qd2 Nb4 13.g5 Nh5 14.Ng1 Nf4 15.Bxf4 exf4 16.h4 Bg4 17.f3 Be6 18.Rc1 Nc6 19.Qxf4 Nd4 20.Bd1 f5 21.Qe3 c5 22.Nd5 Bxd5 23.cxd5 Rb8 24.Ne2 Nxe2 25.Bxe2 b5 26.axb5 Rxb5 27.Rb1 Rb4 28.Kf2 a4 29.Qd2 Qd8 30.Rhg1 Qb6 31.Qc1 fxe4 32.dxe4 c4+ 33.Kg2 Qd4 34.Qc3 Qc5 35.Rgc1 Rc8 36.Qd2 g6 37.Rc3 Bf8 38.Ra3 Bg7 39.Qc2 Ra8 40.Ra2 Be5 41.Rd1 Ra7 42.Qd2 Rf7 43.Rh1 Bf4 44.Qc2 Be5 45.Rb1 Rfb7 46.Qd2 Rf7 47.Qd1 Qb5 48.Qc2 Ra7 49.Qd2 Rf7 50.Qc2 Ra7 51.Bd1 Ra8 52.Qf2 Rf8 53.Qa7 c3 54.Bxa4 Qe2+ 55.Qf2 Qxf2+ 56.Kxf2 Rxb2+ 57.Raxb2 cxb2 58.Ke2 Rf4 both scoresheets unreadable. 0-1, 68 or 69. 0-1

(18479) Simpkins,Jerry (1508) - Chambers,Don (1127) [C57]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.29), 05.02.2019
[Winslow,Elliott]

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Nxd5 [5...Na5; 5...b5; 5...Nd4] 6.Nxf7 Yes, the Fried Liver ("Fegatello" in 17th century Italian, maybe. Google Translate gives "fegato fritto" as the reverse translation. I must consult Guido, our resident at the Mechanics'.) [6.d4] 6...Kxf7 7.Qf3+ Ke6 8.Nc3 Ncb4

[8...Nce7?! 9.d4] 9.a3?! [9.Kd1; 9.Qe4!?; 9.Bb3!?; 9.0-0!? may well be best: 9...c6 10.d4 Qf6 11.Qe2 keeps coming up plus over minus] 9...Nxc2+ 10.Kd1 Nxa1!? [10...Nd4!? 11.Bxd5+ Kd6 (11...Kd7! might be a more reliable equializer at this point) 12.Qf7 Qe7 13.Ne4+ Kd7 14.Nc5+ Kd6= (14...Kd8 15.Nxb7+ Bxb7 16.Qxe7+ Bxe7 17.Bxb7+/= An ending??) ] 11.Nxd5 [11.Bxd5+ Kd7 might just be -+] 11...Kd6?? Stockfish: "+- +4 and going up" [11...Kd7 12.d4 (12.Re1) 12...Bd6 13.dxe5 (13.Re1 is also +/- knocking on +-) 13...Bxe5 14.Re1 +2.7] 12.d4[] exd4?! [12...Qe8 13.dxe5+ Kd7 14.Re1 Kd8 15.Bg5+ Kd7 16.e6+ Kd6 17.Bf4+ Kc5 18.Qc3 b6 19.Ba6+ Kxd5 20.Qc4# 1-0 Gardner,P (1827) - Kostiukevicius,J, 20th ICSC TCh-EUR Club Liverpool 2011; 12...Be6 13.Re1[] b5 (13...c6 14.Rxe5 cxd5 15.Rxd5+ Bxd5 16.Qxd5+ Kc7 17.Bf4+ Qd6 if this is best... 18.Qc5+ Kd7 19.Bb5+ Ke6 20.Qc4+ Qd5 (20...Kf6 21.Be5+ relentless! #16) 21.Bd7+ Kxd7 22.Qxd5+ Kc8 (22...Ke8 23.Bg5 #8. I have found that when the computer finds mate, there is only one possible change: it finds a faster mate.) 23.Qf7 Kd8 24.Qxb7 It hasn't found mate yet! I'm moving along! Hah!) 14.Nb4 bxc4 15.Qc6+ Ke7 16.Bg5+ Kf7 17.Bxd8 Rxd8 18.Qxc7+ Rd7 19.Qxe5 Rd6 20.d5 Bd7 21.Qf4+ Kg8 22.Qxc4 a5 23.Nd3 a4 24.Nc5 h5 25.Nxd7 Rxd7 26.d6+ Kh7 27.Re6 g6 28.Rxg6 1-0 Shirov,A (2709) - Sulskis,S (2544) Tromso Olympiad, Latvia-Lithuania 2014. The only grandmaster game I know of in the Fried Liver.] 13.Bf4+ Kc5 14.Ba2 I know nothing of the Fried Liver Attack, but am astounded that Jerry and Don have found themselves in these far reaches. That said, Stockfish has White completely winning (+10). [Even better is 14.Kd2! although the text is way up there as well (+9 vs. +14)] 14...Be6N [14...c6 15.b4+ Kb5 16.Nc7+ Ka4 17.Kd2 Bd6 18.Qd1+ ("Stockfish? What did they miss here?" 18.Rxa1!! (and Mate in Nine) 18...Bxf4+ 19.Kc2!! (19.Ke1 (slower mate); 19.Qxf4+-) ) 18...Kxa3 19.Bxd6?? (19.Qf3+! Kxb4 (19...Kxa2

20.Rxa1+!! Kxa1 21.Qa3+ Kb1 22.Qb3+ Ka1 23.Be3!! dxe3+ 24.Kc1!!) ) 19...Qxd6 20.Qc1+ Kxb4 21.Qb2+ Ka5 22.Rxa1 Qf4+ 23.Ke1 Qe5+ 24.Kf1 b5 25.Qa3+ Kb6 26.Nxa8+ Kb7 27.Be6 Qb8 28.Qe7+ 1-0, Tekin, M(uhammed Rasit) - Konal, E(mile Nursel), Manavgat Turkey Cup 07.02.2015. Well, so much for "praxis" ("practice" in German) -- Black Resigns, in a won position. (I've included their full names to identify the guilty parties. Do I suspect "fowl" play? After all, that Fried Liver could be goose!) 28...Kxa8-+] 15.b4+ Kb5 16.Nxc7+ Qxc7 17.Bxc7 Bxa2 18.Qxb7+ Ka4 19.Qxa8 Bb3+ 20.Kc1 [20.Ke2 Bc4+ 21.Kf3 Nc2 22.Rb1 (22.Qc6+) ] 20...Kxa3 21.Bd6?? Everything else wins, [with 21.Kb1! way out ahead.] 21...Bxd6 22.Qxh8 Bf4+ 23.Kb1 Nc2? [23...Bc2+ 24.Kxa1 Bd2 25.Qc8 Bc3+ 26.Qxc3+ dxc3 27.Re1 Kxb4= 0.00 ??? across the lines. Oh well! Black plays ...a5 on pretty much everything.] 24.Qf8 [24.Qxg7 best] 24...Bd2 "Everything else" is winning 25.b5+?? [25.Rd1 Bxb4 (25...Bc3 26.Qc5+-) 26.Qxg7 Bc3 27.Qxa7+ Kb4 28.Rd3; 25.Qc5] 25...Nb4-+ 26.Qf3 Bc3?? [26...d3 when only 27.Qxd3 avoids imminent mate] 27.b6?? [27.Qb7=; 27.Rd1=] 27...d3 [27...Bc2+ 28.Kc1 d3 29.Qxd3 Bxd3 30.bxa7 (30.b7 Na6) 30...Be4 31.f3 Bd5 32.Rd1 Bb2+ 33.Kd2 Bd4 Black wins, but has a lot of work to do, to reel in BBN v RP] 28.Qf8? [28.Qxd3 Ba2+ (28...Nxd3?? 29.bxa7 Bd5 30.Rd1+-) 29.Kc1 Nxd3+ 30.Kc2 Bd4 31.Kxd3 Bxb6-+ This one is easier] 28...Bc2+ [28...Bc2+ 29.Kc1 d2# What an epic battle! Maybe not "theoretically important," but it sure got the computer going! And was well worth a view!] 0-1

(18480) Starr,Albert Mart (1500) - Yun,Andrew (1780) [D05]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.30), 05.02.2019

1.e3 d5 2.Nf3 Nf6 3.Be2 c5 4.0-0 e6 5.d4 Nbd7 6.b3 Bd6 7.g3 0-0 8.Nbd2 b6 9.c4 Bb7 10.cxd5 Nxd5 11.Bb2 Rc8 12.Rc1 Qe7 13.Rc2 Nb4 14.Rc1 e5 15.a3 Nd5 16.e4 Nc7 17.d5 f5 18.exf5 Rxf5 19.Bd3 Rff8 20.Qc2 h6 21.Nh4 g5 22.Ng6 Qf7 23.Nxf8 Rxf8 24.Ne4 Qe7 25.Nxd6 Qxd6 26.f4 gxf4 27.gxf4 Qxd5 28.Bc4 1-0

(18481) Perlov,Alexander (1720) - Lamstein,Joshua (1655) [E62]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.32), 05.02.2019

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 0-0 5.Nf3 d6 6.0-0 Nc6 7.Nc3 Rb8 8.e4 Bg4 9.h3 Bd7 10.Be3 b6 11.Rc1 Ne8 12.Qd2 f5 13.exf5 Bxf5 14.Bh6 Qc8 15.Kh2 Nf6 16.Rfe1 Re8 17.Bxg7 Kxg7 18.d5 Nd8 19.Nd4 Bd7 20.Ne4 e5 21.dxe6 Nxe6 22.Qc3 Qd8 23.Re3 Nxd4 24.Qxd4 Bf5 25.Rce1 Bxe4 26.Rxe4 Rxe4 27.Rxe4 c5 28.Qc3 Kf7 29.Rf4 g5 30.Rf5 h6 31.f4 gxf4 32.Rxf4 b5 33.Bd5+ Kg7 34.Rg4+ Kh7 35.Qd3+ Kh8 36.Rg6 Qf8 37.Qc3 b4 38.Rg8+ Kh7 39.Qc2+ 1-0

(18482) Wingenroth,Jordan (1442) - Rakonitz,David (1644) [C02]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.33), 05.02.2019

1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Qb6 5.Nf3 Nc6 6.Bd3 f6 7.exf6 Nxf6 8.Bf4 Qxb2 9.Nbd2 Qxc3 10.Bb5 Bd7 11.0-0 Nxd4 12.Bxd7+ Nxd7 13.Re1 0-0-0 14.Qa4 Nxf3+ 15.Nxf3 a6 16.Rec1 Nb6 17.Qd1 Qf6 18.Bg5 Qf7 19.Bxd8 Kxd8 20.Rab1 Nc8 21.Qd2 Bd6 22.Ng5 Qd7 23.Qe3 e5 24.Qf3 Rf8 25.Qxd5 Rf6 26.Rxb7 Qf5 27.Ne4 Qf4 28.Rd1 Rh6 29.Qg8+ 1-0

(18483) Adams,Sophie (1406) - Abraham,Michael (1609) [B50]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.34), 05.02.2019

1.e4 c5 2.Nf3 d6 3.c3 Nf6 4.Bd3 Nc6 5.Bc2 Bg4 6.0-0 a6 7.d4 cxd4 8.cxd4 Bxf3 9.gxf3 Qb6 10.d5 Nb8 11.Nc3 Nbd7 12.Ba4 g6 13.Rb1 Bg7 14.Bg5 0-0 15.Qd2 Rfc8 16.Bxd7 Nxd7 17.Bxe7 f6 18.Na4 Qb5 19.b3 Ne5 20.Qf4 Rc2 21.Bxd6 Nd3 22.Qe3 Rac8 23.Qb6 Qd7 24.Rbd1 Ne5 25.Bxe5 fxe5 26.Qe6+ Qxe6 27.dxe6 Bf6 28.Rd7 Rb8 29.Nb6 Rc6 30.Nd5 Rxe6 31.Nxf6+ Rxf6 32.Kg2 Rf7 33.Rfd1 Rbf8 34.R1d3 Kg7 35.Kg3 Kh6 36.h3 Kh5 37.a4 Kg5 38.R7d5 Re7 39.b4 Kh5 40.b5 axb5 41.Rxb5 Kg5 42.Rdb3 Rff7 43.R3b4 Kh5 44.Rc4 Re6 45.Rcc5 Ref6 46.Rxe5+ Kh6 47.Rb3 1-0

(18484) Francis,Daniel E (1607) - Soffer,Aaron (1260) [D02]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.35), 05.02.2019

1.d4 d5 2.Bf4 e6 3.Nf3 Nf6 4.e3 Be7 5.Bd3 0-0 6.h4 Ne4 7.Nbd2 f5 8.Qe2 Nc6 9.c3 Kf7 10.Bxe4 dxe4 11.Ne5+ Nxe5 12.dxe5 Ke8 13.0-0-0 Bd7 14.Qh5+ Rf7 15.Qxh7 c5 16.Qh8+ Rf8 17.Qxg7 Qa5 18.Kb1 Bb5 19.Qg6+ Rf7 20.Qg8+ Bf8 21.Nb3 Bd3+ 22.Rxd3 Qb5 23.Rd6 Qc4 24.Rhd1 Ke7 25.Bg5+ Ke8 26.Rd8+ Rxd8 27.Rxd8# 1-0

(18485) Robertson,Wade (957) - Sadowsky,Jacob (1703) [C48]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.36), 05.02.2019
[Winslow,Elliott]

1.e4 Nf6 2.Nc3 e5 3.Nf3 Nc6 4.Bb5 d6 5.Bxc6+ bxc6 6.0-0 Be7 7.d3 0-0 8.Be3 Ng4 9.Bd2 f5 10.Kh1 Qe8 11.Ng1 fxe4 12.Nxe4 d5 13.f3

13...Nxh2! 14.Kxh2 dxe4 15.fxe4 Rxf1 16.Qxf1 Qh5+ 17.Nh3 Bg4 [17...g5!] 18.Qh1 [18.Qg1] 18...Bc5 19.Rf1 g6 20.Kg3 Be2 21.Rf6 Qg4+? [21...Be7!] 22.Kh2 Qh4? [22...Be7=/+] 23.Rxc6?? [23.Bg5! Qh5 24.Qe1+/=] 23...Bf2 24.Be1 Qg3# 0-1

(18486) Frank,Robert H (1426) - James,Charles (1419) [D04]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.37), 05.02.2019

1.d4 d5 2.Nf3 c6 3.e3 Nf6 4.Bd3 Bg4 5.Nbd2 Nbd7 6.0-0 e5 7.dxe5 Nxe5 8.h3 Nxd3 9.cxd3 Bh5 10.a3 Bd6 11.Re1 0-0 12.e4 Qc7 13.g4 Nxg4 14.hxg4 Bxg4 15.Nf1 f5 16.exd5 Rf6 17.dxc6 Rg6 18.Qb3+ Kh8 19.Nh4 Rf6 20.Qxb7 Rb8 21.Qxc7 Bxc7 22.b4 f4 23.Re4 g5 24.Bb2 Rbf8 25.Bxf6+ 1-0

(18487) Newey,Richard (1600) - Buchner,Karl [C08]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.38), 05.02.2019
[Winslow,Elliott]

1.e4 e6 2.d4 d5 3.Nd2 c5 4.exd5 exd5 5.Bb5+ Nc6 6.Ngf3 Nf6 7.0-0 Qb6 8.Qe2+ Be7 9.Re1 Be6 10.Ng5 Ne4 11.Nxe6 fxe6 12.Nxe4 dxe4 13.c4 0-0-0?! [13...0-0+/=] 14.Bxc6 Qxc6 15.dxc5 Bxc5 16.Be3 Rhe8 17.a3 h6?! 18.b4 Bb6 19.c5 Bc7 20.Qg4 Qd5 21.Rad1 Qe5 [21...Qf5!?] 22.g3 Rd3 23.Bf4 Qd4 24.Bxc7 Kxc7 25.Rxd3 Qxd3 26.Qxg7++- Kb8 27.Re3 Qd1+ 28.Kg2 Qh5 29.Qd4 Qd5 30.Qxe4 Rd8 31.Qxd5 exd5 32.f4 Kc7 33.Rd3 [33.Re7+ Kc6 34.Re6+ Kb5 35.Rxh6 Kc4 36.Rd6] 33...Kc6 34.a4 d4 35.f5 Kd5 36.Kf3 Ke5 37.g4 Kd5 38.Rd1 Kc4 39.Ke4 Re8+ 40.Kf4 d3 41.b5 Kc3 42.f6 Kc2 43.Rf1 d2 44.h4 Re1 45.Rf2 Kd3 46.Rxd2+ Kxd2 47.g5 hxg5+ 48.hxg5 Kd3 49.a5 Kd4 50.c6 Re4+ 51.Kf5 Re5+ 52.Kg6 Rxb5 53.cxb7 Rxb7 54.f7 Rb8

55.Kg7?? [55.Kf6+-; 55.Kf5+- (!)] 55...Ke5= 56.f8Q Rxf8 57.Kxf8 Kf5 58.Ke7 a6?? [58...Kxg5=] 59.Kd6 Kxg5 60.Kc6 Kf6 61.Kb6 Ke7 62.Kxa6 Kd7 63.Kb7 1-0

(18488) Otterbach,Renate (1281) - Tabatabai,Ashkon (1138) [C50]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.39), 05.02.2019
[Winslow,Elliott]

1.e4 e5 2.Nf3 Nc6 3.d4 d6 4.Bc4 Nge7 5.c3 Bg4 6.Nbd2 [6.Bxf7+] 6...d5 7.exd5 Nxd5 8.0-0 Nf6 9.Qb3 Be6 10.Bxe6 fxe6 11.Qxe6+ Qe7 12.Qxe7+ Bxe7 13.Nxe5 Nxe5 14.dxe5 Nd5 15.Nf3 0-0-0 16.Bg5 Bxg5 17.Nxg5 Rhf8 18.Ne6 Rfe8 19.Nxd8 Kxd8 20.Rfe1 Nf4 21.Rad1+ Ke7 22.g3 Ng6 23.e6 Kf6 24.Rd7 Rxe6 25.Rxe6+ Kxe6 26.Rxc7 a5 27.Rxb7 Kf6 1-0

(18489) Reyes,Victor Hugo - Capdeville,Barry (1219) [D00]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.40), 05.02.2019

1.d4 d5 2.Bg5 Nd7 3.e3 Ngf6 4.f4 e6 5.Bd3 Be7 6.Nf3 Ne4 7.Bxe7 Qxe7 8.0-0 0-0 9.Nbd2 Ndf6 10.Ne5 Nxd2 11.Qxd2 Ne4 12.Qe1 f6 13.Ng4 e5 14.Bxe4 dxe4 15.Qh4 Bxg4 16.Qxg4 f5 17.Qe2 exd4 18.exd4 Rf6 19.c4 c5 20.d5 a5 21.Rf3 Rh6 22.h3 Raa6 23.Rg3 Rag6 24.Rxg6 Rxg6 25.Rd1 Qd6 26.Qe3 Rh6 27.Qd2 b6 28.Rf1 Kf7 29.Qe3 Ke7 30.Rf3 Qf6 31.Qe2 Qd4+ 32.Kh2 Kd6 33.Rg3 Rh4 34.Rb3 Kc7 35.g3 Rh6 36.h4 Qf6 37.Rc3 g5 38.Qe3 gxh4 39.g4 Qd4 40.gxf5 Rf6 41.Qe1 Rh6 42.b3 Rf6 43.Re3 Rxf5 44.Rxe4 Qf6 45.Re7+ Kb8 46.Re6 Qf7 47.Rxb6+ Kc7 48.Qxa5 Kd8 49.Qa8+ 1-0

(18490) Cendejas,Jon (952) - Rushton,Peter (1186) [C55]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.42), 05.02.2019
[Winslow,Elliott]

1.e4 e5 2.Nf3 Nc6 3.Bc4 h6 4.Nc3 Nf6 5.d3 Be7 6.Be3 Ng4 7.Bd2 Bc5 8.Qe2 Bxf2+ 9.Kd1 Bc5 10.Be1 d6 11.Nd5 0-0 12.h3 Nf6 13.Nxf6+ Qxf6 14.a3 Nd4 ("15.Qf3" is not legal, and White's next queen move is 25.Qh2. Enough.) 1-0 37 1-0

(18491) Birdsall,Erik - Sullivan,George (958) [D02]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.43), 05.02.2019

1.d4 d5 2.Nf3 Nf6 3.Bf4 Nc6 4.e3 a6 5.c3 e6 6.Bd3 Bd6 7.Bg5 Be7 8.Qc2 g6 9.Nbd2 Qd6 10.e4 e5 11.exd5 Qxd5 12.Ne4 Bf5 13.Bxf6 Bxe4 14.Bxh8 Bxd3 15.Qxd3 e4 16.Qe3 exf3 17.Qxf3 Qe6+ 18.Be5 0-0-0 19.0-0 Nxe5 20.dxe5 Qxe5 21.Qxf7 Bd6 22.g3 Qh5 23.Rfe1 Be5 24.Qe6+ Kb8 25.Rxe5 Qf3 26.Rae1 Rd6 27.Qg8+ Ka7 28.Qxh7 Rd2 29.Rf1 1-0

(18492) Reed,Nicholas (1271) - Dunlap,Steven (1057) [B30]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.45), 05.02.2019
[Winslow,Elliott]

1.e4 c5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.d3 Nf6 6.Be3 c4 7.Nc3 cxd3 8.cxd3 Ng4 9.Bd4 e6 10.h3 c5 11.hxg4 cxd4 12.Qa4+ Bd7 13.Qxd4 f6 14.Rc1 Rc8 15.Qe3 Bc5 16.d4 Bb6 17.0-0 e5 18.Ne2 Rxc1 19.Rxc1 Bxg4 20.Qb3 Bxf3 21.gxf3 f5 22.Qe6+ Kf8 23.Rc8 g6 24.Rxd8+ [24.Qf6+!] 24...Bxd8 25.Qxe5 Rg8 26.Nf4 Be7 27.d5 g5 28.Ne6+ Kf7 29.Qxf5+ Bf6 30.Qxh7+ Bg7 31.Nxg7 Rxg7 32.Qf5+ Kg8 33.d6 g4 34.fxg4 Rf7 35.Qc8+ Rf8 36.d7 1-0

(18493) Cole,Tony (1520) - Yamamoto,Craig (1500) [B50]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.46), 05.02.2019
[Winslow,Elliott]

1.e4 c5 2.Nc3 e6 3.Nf3 d6 4.Bc4 a6 5.a3 Nc6 6.d3 b5 7.Ba2 Bb7 8.0-0 Be7 9.Ne2 Bf6 10.c3 h6 11.Re1 Nge7 12.d4 cxd4 13.cxd4 Rc8 14.d5 exd5 15.exd5 Ne5 16.Nxe5 dxe5 17.d6 Nf5 18.d7+ Qxd7 19.Qxd7+ Kxd7 20.Bxf7 Rhd8 21.Bh5 Kc7 22.Bg4 g6 23.Ng3 h5 24.Nxh5 Bh8 25.Ng3 Rf8 26.Bd2 Rce8 27.Ba5+ Kb8 28.Rac1 Rc8 29.h4? Rxc1 30.Rxc1 Nxh4 31.f3 e4 32.Bc7+ Ka7 33.Bd6 Re8 34.fxe4 Bxb2 35.Rc7 Be5 36.Bxe5 Rxe5 37.Bc8? [37.Rh7+-] 37...Kb8 38.Rxb7+ Kxc8 39.Ra7 Re6 40.Kf2 Rf6+ 41.Kg1 g5 42.Nh5 Re6 43.Ng3 Ng6 44.Kf2 Kb8 45.Rg7 a5 46.Ke3 b4 47.axb4 axb4 48.Rh7 Nf4 49.Kf3 b3 50.Rh1 b2 51.Rb1 Rb6 52.Nf5 Nd3 53.Ne3 Rb3 54.Nc4 Nc1+ 55.Kf2 Na2 56.Nxb2 Nc3 57.Rc1 Rxb2+ 58.Kf3 Nxe4 59.Kxe4 1/2-1/2

(18494) Ahrens,Richard - Bryan,Robert R (429) [A04]
Mechanics' Winter TNM; G/2 d5 San Francisco (5.47), 05.02.2019

1.g3 c5 2.Nf3 d6 3.Bg2 Nc6 4.0-0 Nf6 5.b3 Bg4 6.Bb2 e5 7.Nc3 Be7 8.h3 Bh5 9.e4 0-0 10.d3 b5 11.Qd2 h6 12.Nd5 Nxd5 13.exd5 Na5 14.c4 bxc4 15.dxc4 e4 16.Nh2 Bg5 17.Qe1 Re8 18.Bc1 Qf6 19.Rb1 Nb7 20.Bxg5 hxg5 21.Qe3 a5 22.Ng4 Qf5 23.Nh2 f6 24.g4 Qg6 25.gxh5 Qxh5 26.Bxe4 a4 27.Qf3 g4 28.Nxg4 Qg5 29.Bf5 Kh8 30.Be6 axb3 31.axb3 Na5 32.Kh2 Rab8 33.Qg3 Red8 34.f4 Qh5 35.f5 Qg5 36.Rf4 Nxb3 37.Bf7 Nd2 38.Rxb8 Rxb8 39.h4 Qg6 40.Bxg6 Nf1+ 41.Rxf1 Rb2+ 42.Rf2 Rb4 43.Qxd6 Rb8 44.Qxb8# 1-0