My 2nd Round Win Against WGM Carla Heredia in TNM Round 2

 I won a very hard-fought equal game against WGM Carla Heredia in the second round of Tuesday Night Marathon organized by Mechanics Chess Institute today.

Ashik and Ahyan's Round 5 and 6 Games in Mechanics Chess Institute TNM A...

Last Tuesday Ahyan and I played the 5th and 6th round of Tuesday Night Marathon online over chess.com arranged by Mechanics Chess Institute. The games are live analyzed by FIDE Master Paul Whitehead and Abel Talamantez. After a nice win by Ahyan at 5th round he was jointly in second position with 4 out of 5 in the open section which is phenomenal at his age and rating. Ahyan and I joined the commentary by invitation from TD Judit Sztaray after the 6th round for a short time. Here are some excerpts from our games and the commentaries. The TNM newsletter for this round may be found here - https://www.milibrary.org/chess-newsletters/931

Round 6:

Jonah Busch (Kondsaga) (1711) - Ahyan Zaman (ahyanzaman) (1496) [E11]
Live Chess Chess.com, 18.08.2020
[de Firmian,Nick]

1.d4 Nf6 2.c4 e6 3.Nf3 Bb4+ 4.Nbd2 [4.Bd2] 4...d5 Old-style. [4...0-0 keeps options: 5.a3 Be7 6.e4 d5 (6...d6!? rather asks the N/d2, what are you doing there...) 7.e5 Nfd7 8.Bd3 c5 9.h4!? was a fun line until it was clarified that 9...g6! was the way to defend. (The "fun" happens after 9...cxd4?? 10.Bxh7+!) ; Or there's 4...b6 "committing" to the Queen's Indian.] 5.a3 [5.Qa4+] 5...Bxd2+?! This is probably White's "as good as it gets" against the Bogo-Indian. Two bishops, Black's unsolved bad LSB. [5...Be7 is almost always played.] 6.Nxd2!? [6.Bxd2 is 7 or 8 times as common -- but the text move scores better. And it makes sense, to contest e4 (guarding c4 is almost incidental).] 6...0-0 7.g3?!

[7.e3 is more common by a lot, if more sensible, first played at least as early as 1931! 7...b6 8.cxd5 exd5 9.Bd3 Nbd7 10.b3 c5 11.Bb2 1-0 (29) Zamikhovsky,A-Rosenkrantz,K Moscow 1931] 7...dxc4!? Looks good, since White can't take back (... Qd5...). [But 7...Nc6! 8.e3 e5 highlights the problem. Black busts open the center and puts White on the spot. 9.Bg2 exd4 10.cxd5 dxe3 11.fxe3 Nxd5] 8.Bg2 Qxd4 9.0-0 Rd8 [9...Nc6! 10.Qc2 (10.Bxc6?! bxc6 when White will miss his king bishop even more than Black was.) 10...Na5 gets annoying.] 10.e3 [10.Qc2 wins back one pawn with sufficient compensation for the other (Black's queen gets kicked around more than she'd like).] 10...Qd3 Clear plus Black now. 11.Qa4 c3 [11...Bd7!? 12.Qxc4 Bc6 Who's your bad bishop now?] 12.bxc3 Qxc3?! [12...Bd7 here also] 13.Rb1 c6 [13...Nd5] 14.Ne4 [14.Bb2! Some queen-kicking coming.] 14...Nxe4 15.Bxe4 f5 [Not a lot of humans find 15...Re8! thinking about dulling the long diagonal with ...e5 at some point.] 16.Bb2 Qc5 17.Bc2 Rd2?! Black needed to be thinking development, defense. [17...Nd7 18.Rfd1 Re8] 18.Rfc1 [18.Bb3! thwarts.] 18...Rd7

Black's position would be pathetic if he didn't have two pawns to show for it; but maybe that's not enough. 19.Bb3 Qe7 20.Qf4 threatens f5 [20.Qc4!] 20...Qf7 21.Qe5?! [21.e4! fxe4 22.Qxe4 Rd8 23.Re1 Is this a Bogo-Indian -- or a Danish Gambit!?] 21...Re7 22.Rd1 Nd7 Black might consolidate now! 23.Qc3 Nf8 24.Rd6 Rd7?! Black needs a plan. [How about 24...b6! intending ...Bb7 whether or not White takes on c6.] 25.Rbd1 Rxd6 26.Rxd6 Bd7 27.Qd4 Rd8?! 28.h4 [28.Qxa7! Qe7+/= 29.Qd4?! (29.Qc5; 29.Rd2) 29...c5!= 30.Qxc5? Ba4!] 28...Qe7 29.h5 c5 3:20 remaining

The game has become critical. [29...h6!] 30.Qe5? 6:26 remaining [30.Qxc5! Ba4? (30...h6!= has to, has to be played!) 31.Rxd8! Qxc5 32.Bxe6+ Kh8 33.h6! and White mates.] 30...Re8?? Ahyan took a good minute on this move, but it missed the danger: that Alpha pawn is zeroing in on Black's king and must be stopped! [30...h6!-/+] 31.h6! winning! 31...Qf6 [31...Ng6 when 32.Rxe6!! (32.Qxc5 is about as good, and wins prosaically) 32...Nxe5 33.Rxe7+ Kf8 34.Rxg7!+- puts some flash into it.] 32.hxg7 Qxe5 33.gxf8Q+ Kxf8 34.Bxe5 With the extra bishop (and a powerful one at that on e5) White just wins the endgame. 34...Ke7 35.Rd2 Rc8 36.Bf6+ Ke8 37.f3 c4 38.Bc2 c3 39.Rd3 [39.Rh2] 39...Bb5 40.Rxc3 Rxc3 41.Bxc3 Kd7 42.e4 fxe4 43.Bxe4 Kd6 44.Bxb7 Kc5 45.Bb4+ Kc4 46.Kf2 Kd3 47.Be4+ Kc4 48.Bxh7 Kd5 49.Be4+ Ke5 50.Ke3 Bc4 51.f4+ Kf6 52.g4 Kg7 53.Kd4 Bb5 54.Ke5 Bd7 55.Bc5 Kf7 56.Bxa7 Kg7 57.Bd4 Kf7 58.Bc2 Bc8 59.a4 Bd7 60.a5 Bc8 61.Bd3 Bb7 62.a6 Ba8 63.a7 Bd5 64.Be4 Ba8 65.Bxa8 Kg6 66.Be4+ Kf7 67.a8Q Ke7 68.Qa7+ Kf8 69.Kxe6 Ke8 70.Qe7# Kondsaga won by checkmate 1-0

 

My Loss against Ivanov in 2nd round of TNM anallyzed by IM Elioot Winslow in TNM Newsletter

(14) Uzzaman,Ashik (1931) - Ivanov,Aleksander (2171) [B23]
Mechanics' Spring TNM: 2000+ San Francisco (2.14), 26.03.2019
[Winslow,Elliott]

1.e4 c5 2.Nc3 Nc6 3.f4 g6 4.Nf3 Bg7 5.Bb5 Nd4 6.0-0 [6.Bc4; 6.Bd3] 6...Nxb5 [6...a6; 6...e6] 7.Nxb5 d5 [7...d6] 8.exd5 a6 9.Nc3 Nf6 10.d4 Nxd5 11.dxc5 Nxc3 12.Qxd8+ Kxd8 13.bxc3 Bxc3 [13...Kc7!? 14.Nd4 Rd8 15.Be3 Bf5] 14.Rb1 Kc7 [14...f6!?] 15.Rb3 Bf6 16.Bd2

I would like to ask both players if they knew what a theoretical rabbit-hole they went into with this line! There are over 60 games here! 16...a5 [16...Be6 has been most often played: 17.Ba5+ (17.Rb6!? a5) 17...Kc6 But this might well not be the best! (17...Kb8!! is Stockfish's adamant (and unplayed!) preference, with a slight plus! 18.Rd1!! b5!!) 18.Rb6+ Kxc5 19.Nd2 Bxa2! according to Stockfish the only 0.00 move (19...Bd5; 19...Bd4+ 20.Kh1 Bxa2 21.c3!N +-) ; 16...Bf5 17.Ba5+ Kc8 18.Rb6 Rd8 19.c6 bxc6 20.Rxc6+ Kd7 21.Rxf6 exf6 22.Rd1+ Ke8 23.Bxd8 Rxd8 24.Rxd8+ Kxd8 25.Nd4 saw White grind to the edge of a win and then miss; ½-½ (78) Keller,C (2200)-Leon Hoyos,M (2521) Metz 2010] 17.a4? Lets Black out. [17.Rfb1 Ra7 18.Rb5 (18.c6! (Stockfish 10) 18...Kxc6! 19.Be3 Ra6 remains tense but Black is no worse) 18...Bd7! 19.Rb6 (19.Bxa5+ Kc8 20.c6 (20.Bb6?! Rxa2 21.Ra5 Rxa5 22.Bxa5 Bf5 (22...Bc6=/+) 23.Ne5 Bxc2 24.Rc1 Be4 25.Rd1 Bxe5 26.fxe5 Bf5 27.Bb6 h5 28.Kf2 Be4 29.g3 e6 30.Rd6 Bc6 31.h4 Rf8 32.Ke3 Bd7 33.Rd1 Bc6 34.Rd6 f6 35.Rxe6 fxe5 36.Rxg6 Kd7 37.Rg5 Rf3+ 38.Ke2 e4 39.Rxh5 Bb5+ 40.Kd1 e3 41.Re5 e2+ 42.Kd2 Rd3+ 43.Kc2 Rxg3 44.Ba5 Kc6 45.Bd2 Bd3+ 46.Kc3 Kb5 47.Be1 Rh3 48.Kd4 Bg6 49.c6+ Kxc6 50.Re6+ Kd7 51.Rxg6 Rh1 52.Rg7+ Kc6 53.Rg6+ Kd7 54.Rg7+ Kc6 55.Rg6+ Kd7 1/2-1/2 (55) Lazar,A (2129)-Danner,G (2401) Pula 2012) 20...Bxc6 21.Rc5 e6 22.Bc3 Bxc3 23.Rxc3=/+) ] 17...Be6-/+ 18.Rb6 Rhd8 19.Rfb1 Bd5 20.f5 slightly suicidal [20.Be3 Rd7 (20...Bc6) ] 20...gxf5 21.Bf4+ Kc8 [21...Kd7] 22.Ne5 Bxe5 23.Bxe5 Bc6

Quite an amazing situation, that Black is as won as he is here. 24.Bc3 [24.Rf1] 24...Rd5 25.Re1 Kd7 [25...Rxc5!] 26.Re5 Rxe5 27.Bxe5 Ke6 28.Bf4 Rd8 29.Rb3 Rd4 30.Bc7 Rxa4 31.Rh3 Ra1+ 32.Kf2 a4 33.Rh6+ f6 34.Rxh7 a3 35.Rh8 a2 36.Ra8 Bd5 37.h4 Rc1 38.h5 a1Q 0-1