Julio Salas Romo vs Heriberto Appel (1945)

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Kibitzing

Julio Salas Romo vs Heriberto Appel
Vina del Mar (1945), Vina del Mar CHI, rd 11, Jan-??
Budapest Defense: Alekhine. Abonyi Variation (A52) · 1-0

ANALYSIS [x]

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< Earlier Kibitzing · PAGE 2 OF 2 · Later Kibitzing>
Nov-09-17		paavoh: I felt that 21. Rxd6+ was better than Nxd6 because the WB remained on f5 taking away escape routes, and then the follow-up was rather easy. Sorry, I misread the line by <latebishop>, hence the correction. And <Lambda> has provided the correct answer.

Nov-09-17		goodevans: This is way too tough for a Thursday. Let's start with <21.Rxd6+ cxd6 22.Bxb6+ Ke7 23.Nc5+ Kf6 24.Nd7+ Kg7 25.Nxf8>. So far not too difficult, but at this point white has no fewer than three pieces en prise whilst black has none so how is he going to maintain his material advantage? Further study shows white winning in all lines but to a mere mortal like me that sort of depth of analysis belongs to the weekend.

Nov-09-17		mel gibson: Black made a mistake in this game by not taking the White Bishop with the pawn on g6. The computer shows that then it's close to a draw: (21. .. gxf5 (g6xf5 ♘d6xb7+ ♔d8-c8 ♕f2-c2 ♔c8xb7 ♕c2xb3 ♖a8-d8 c4-c5 ♖d8xd1 ♖e1xd1 ♕f8-e7 c5xb6 a7xb6 ♖d1-d3 ♖h8-g8 ♕b3-c4 h6-h5 ♕c4-d5 ♕e7-f6 ♕d5-a2 ♕f6-e7 ♕a2-c4 h5-h4 ♕c4-d5 ♕e7-e4 ♕d5xe4 f5xe4 ♖d3-d7) -0.50/19 58 score for Black -0.5 depth 19. . . . The computer chooses the solution as 21. Rxd6: (21. Rxd6+ (♖d1xd6+ c7xd6 ♗e3xb6+ ♔d8-e7 ♘e4-c5+ ♔e7-f6 ♘c5-d7+ ♔f6-g7 ♘d7xf8 ♖h8xf8 ♗f5-c2 a7xb6 ♗c2xb3 ♖f8-d8 ♕f2xb6 ♖d8-d7 ♗b3-c2 ♔g7-g8 ♗c2-e4 ♘c6-e7 ♗e4xb7 ♖a8-b8 b2-b4 ♘e7-f5 ♕b6-f2 ♖b8xb7 g2-g4 ♘f5-g7 f4-f5 ♖b7-c7 ♕f2-f4) +4.79/17 269) score for White +4.79 depth 17.

Nov-09-17		whiteshark: <21.Rxd6+ cxd6 22.Bxb6+ axb6 23.Qxb6+ Ke7 24.Qc7+ Ke8 25.Qd7#> (check forcing moves first)

Nov-09-17		morfishine: Seems more than one move cracks open this clam shell *****

Nov-09-17		patzer2: Fell for the cheap trick played in the game by trying to make this Thursday puzzle (21. ?) too easy with 21. Nxd6 which starts to fizzle out after 21...gxf5! 22. Nxb7+ Kc8 23. Qc2 Kxb7 ⩲ (+0.45 @ 33 ply, Stockfish 8). Instead, 21. Rxd6+! cxd6 22. Bxb6+ axb6 23. Qxb6+ Ke7 24. Qxb7+ Ke8 25. Qd7# is a decisive threat. Our chessgmames.com Stockfish 8 engine prolongs the agony for Black with 21.Rxd6+! cxd6 22.Bxb6+ Ke7 23.Qh4+ f6 24.Nxf6+ Ne5 25.Nd5+ Kf7 26.Qf6+ Kg8 27.Ne7+ Qxe7 28.Qxe7 gxf5 29.Qxb7 axb6 30.fxe5 Nd2+ 31.Kg1 Re8 32.Qd7 Rxe5 33.Rxe5 Nf3+ 34.gxf3 dxe5 35.Qe8+ Kg7 36.Qxe5+ Kg8 37.Qxf5 Kg7 38.Qe5+ Kh7 39.Qc7+ Kg8 40.Qxb6 Kf7 41.b4 Rg8+ 42.Kf2 Kg7 43.Qb7+ Kg6 44.Qe7 Rg7 45.Qd6+ Kg5 46.h4+ Kh5 +- (+8.89 @ 34 ply) For a Black improvement, the Stockfish 8 recommendation of ditching 8...Qd7?! ⩲ to ± (+0.60 @ 20 ply) in favor of simple development with 8...d3 = (+0.16 @ 19 ply) appears to keep it about level. If the second player must play the Queen to e7, the popular move 7...Qe7 as in Black's win in Y Lavrenov vs A Marechal, 2001 seems more prudent than the rare 7...b6 played in this game.

Nov-09-17		Whitehat1963: Saw yesterday’s puzzle in a flash. Today’s? Not at all. And it seems relatively easy in retrospect.

Nov-09-17		malt: Got 21.R:d6+ (21.N:d6 gf5)21..cd6 22.B:b6+ Ke7 23.Qh4+ g5 (23...f6 24.N:f6) 24.N:g5+ Ne5 (24...Kf6 25.Nh7+) 25.Nh7+ f6 26.N:f8 <morfishine> Seems more than one move cracks open this clam shell

Nov-09-17		thegoodanarchist: <patzer2: Fell for the cheap trick played in the game... > Add one more to the list - I went for the knight capture too.

Nov-09-17		wtpy: I also captured with the knight because I thought 21 ..gf5 22 Nh8+ Qh8 23 Qc2 was a plus but Olga disagrees and sadly she is almost always right.

Nov-09-17		QueenMe: Got it! Took < 5 secs. Saw the double-discover of the N & B on the E file, that the capture of the N would reduce protection at B6 to a single pawn, making the B sacrifice possible, & everything. Yay! Either I'm getting better or this was pretty easy.

Nov-09-17		Walter Glattke: A computer is no grandmaster, he/it would not comment 21.Qh4+ Ne7 22.Nxd5 g5 23.Nxb7+ Ke8 24.Bd7# or others, the metal brains but will find out, that 21,Qh4+ is a winner for white, maybe better than 21.Rxd6+

Nov-09-17		varishnakov: I first saw the mate played in the game, then asked what would happen if white captures the bishop, allowing the discovered check. So I said that taking with the rook is more forcing, but then the problem with that is it allows the king to step over to the king-side, so I just went back with Nxd6 and forgot about the bishop capture defense. Looking at the comments, I remembered it again.

Nov-09-17		kevin86: Mate follows on the bias.

Nov-09-17		patzer2: <Walter Glattke> Looks like your suggested 21. Qh4+ is an alternative winning solution. Our chessgames.com Stockfish 8 engine assesses it as a decisive advantage for White after 21. Qh4+ f6 22.Bxg6 Ne7 23.f5 Kc8 24.Kg1 Bc6 25.Rd3 Nc5 26.Bxc5 dxc5 27.Qxf6 Qxf6 28.Nxf6 Rf8 29.Rxe7 Rxf6 30.g4 Rf8 31.Rh7 h5 32.g5 Kb7 33.Rb3 Be4 +- (+2.25 @ 20 ply).

Nov-09-17		Breunor: 11 ... Kd8 looks strange. Why not 0-0?

Nov-09-17		patzer2: <Breunor> Your suggested improvement 11...0-0 = looks good. Our chessgames.com Stockfish 8 engine assesses it as level after 11...0-0 12.Bd3 Qf6 13.Qc2 Qh6 14.Kg1 d6 15.Be4 Bb7 16.Ng5 g6 17.a3 Bc5 18.b4 Bxe3+ 19.Rxe3 Qg7 20.Rae1 a5 21.b5 Nd4 22.Qd3 Bxe4 23.Qxe4 Nd7 24.Qe7 Nf6 25.Qxc7 Ng4 = (+0.02 @ 20 ply)

Nov-09-17		agb2002: White has the bishop pair for a bishop, a knight and a pawn. Black threatens gxf5. The first idea that comes to mind is 21.Rxd6+ cxd6 (21... Ke7 22.Rd7+ Ke8 23.Nf6#; 21... Ke8 22.Nf6+ Ke7 23.Bc5+ Ne5 24.Rxe5#) 22.Bxb6+ Ke7 (22... axb6 23.Qxb6+ Ke7 -23... Ke8 24.Nf6#- 24.Qc7+ Ke8 25.Nf6#) 23.Nxd6+ Kxd6 24.c5+ Kd5 25.Qf3+ Kc(d)4 26.Qd3#. However, Black can play 23... Kf6. ----- Another option is 21.Nxd6: A) 21... cxd6 22.Bxb6+ axb6 23.Qxb6#. B) 21... gxf5 22.Nxf7+ B.1) 22... Kc8 23.Nxh8 Qxh8 24.Qc2 B.1.a) 24... Nbd4 25.Bxd4 Nxd4 26.Rxd4 Qxd4 27.Qxf5+ Kd8 (27... Kb8 28.Re8+ and mate in two; 27... Qd7 28.Re8#) 28.Qf8+ Kd7 29.Re7+ Rd6 (29... Kc6 30.Re6+ Qd6 31.Rxd6+ cxd6 32.Qxh6 + -) 30.Re8+ Kd7 (30... Kc6 31.Re6+ as above) 31.Qf7+ Kc6 (31... Kd6 32.Re6+ Kc5 33.Qxc7+ Bc6 34.Q(R)xc6#) 32.Re6+ as above. B.1.b) 24... Nc5 25.Bxc5 bxc5 26.Qxf5+ Kb8 27.Qd7, with the threat Re8+, looks winning (27... Bc8 28.Re8). B.2) 22... Ke8 23.Nxh8 Qxh8 (due to Ng6 and Bd4+) 24.Bd4+ wins decisive material.

Nov-09-17		Cheapo by the Dozen: I whiffed totally, not even thinking of the second move in the combination. Good puzzle. I was intrigued by Qh4+, which seemed like the only way to keep the light-squared diagonal covered. But I didn't see any deadly-looking followups against ... Qe7

Nov-09-17		cormier: 1) +0.48 (34 ply) 4.Nc3 Nxe5 5.Nf3 Nxf3+ 6.exf3 Bb4 7.Qe2+ Qe7 8.Qxe7+ Bxe7 9.Nd5 Bd8 10.Be3 d6 11.O-O-O Nc6 12.Be2 Be6 13.f4 a5 14.g4 g6 15.h4 h5 16.f5 gxf5 17.g5 Ne5 18.c5 Ng4 19.cxd6 Nxe3 20.fxe3 cxd6 21.Kb1 Rc8 22.Nf4 Be7 23.Nxh5 a4 2) +0.39 (34 ply) 4.Nf3 Nc6 5.Nc3 Ngxe5 6.Nxe5 Nxe5 7.e3 g6 8.b3 Bg7 9.Bb2 d6 10.Be2 O-O 11.O-O Re8 12.Qd2 a5 13.Rad1 Be6 14.Nd5 Nd7 15.Bxg7 Kxg7 16.Nf4 Nc5 17.Bf3 Kg8 18.Qc3 Bd7 19.g3 Re5 20.Nd3 Nxd3 21.Qxd3 Rb8 3) +0.36 (34 ply) 4.b3 4) +0.33 (34 ply) 4.Bf4 Bb4+ 5.Nc3 Nc6 6.Nf3 Bxc3+ 7.bxc3 Qe7 8.Qd5 f6 9.exf6 Nxf6 10.Qd3 d6 11.g3 Ne5 12.Nxe5 dxe5 13.Bg5 c6 14.Bg2 Be6 15.Bxf6 gxf6 16.Rb1 O-O 17.O-O f5 18.Rfd1 Rfd8 19.Qc2 e4 20.Rxd8+ Rxd8 21.Qa4 b6 22.Qxc6 Rd2 23.Bf1 Rxa2 24.e3 Kg7 5) +0.21 (33 ply) 4.e3 Nxe5 5.Be2 Bb4+ 6.Bd2 Bxd2+ 7.Qxd2 d6 8.Nc3 O-O 9.Nf3 a5 10.Nxe5 dxe5 11.Rd1 Qxd2+ 12.Rxd2 Be6 13.O-O Na6 14.Rfd1 f5 15.Nb5 Rac8 16.f4 e4 17.Nd4 Bd7 18.g3 b6 19.Nb5 Be6 20.Nc3 Nc5 21.b3 g6 22.Kf2 Kg7 1.5 hour analysis by Stockfish 8

Nov-09-17		cormier: 1) +0.19 (34 ply) 5.Nc3 Bb4 2) +0.12 (34 ply) 5.Nf3 Nxf3+ 6.Qxf3 Bc5 7.Be3 Bb4+ 8.Nd2 d6 9.Be2 Nc6 10.O-O Bxd2 11.Bxd2 Nd4 12.Qd3 Nxe2+ 13.Qxe2 O-O 14.Bc3 Re8 15.Qd3 b6 16.Rae1 Bb7 17.Qg3 f6 18.f3 a5 19.b3 Qe7 20.a4 Qf7 21.Rd1 h6 22.Rfe1 Re6 23.Rd3 Rae8 24.h3 3) +0.18 (33 ply) 5.a3 a5 60.0 minute analysis by Stockfish 8

Nov-09-17		cormier: 1) +0.20 (35 ply) 6.Nc3 2) +0.19 (35 ply) 6.a3 d6 7.Be2 a5 8.Nf3 g6 9.O-O Bg7 10.Nc3 Na6 11.Be3 O-O 12.Nd4 Nc5 13.Nxc6 bxc6 14.Qc2 Qe7 15.Bxc5 dxc5 16.Rad1 Be6 17.f5 Bd4+ 18.Kh1 Bd7 19.Qd2 Rad8 20.Bd3 Rfe8 21.Na4 gxf5 22.exf5 Qe3 23.Qxa5 Ra8 24.Qxc7 3) +0.06 (34 ply) 6.Be3 Bb4+ 7.Nd2 d6 8.a3 Bc5 9.Bxc5 dxc5 10.Nb3 O-O 11.Nf3 b6 12.Bd3 a5 13.e5 f5 14.Qc2 a4 15.Nc1 Nd4 16.Nxd4 Qxd4 17.Ne2 Qe3 18.Qd2 Qxd2+ 19.Kxd2 Nc6 20.Ke3 Bb7 21.Rhg1 Nd8 22.g4 fxg4 23.Be4 Bxe4 24.Kxe4 Ne6 25.Rxg4 60.0 minute analysis by Stockfish 8

Nov-09-17		cormier: 1) +0.17 (27 ply) 7.Nc3 Bxc3+ 8.bxc3 d6 9.Nf3 b6 10.Bd3 Bb7 11.c5 dxc5 12.O-O Nd7 13.Bf2 O-O 14.e5 g6 15.Bh4 Qe8 16.Qe2 Na5 17.Bg5 c4 18.Bc2 Nc5 19.Bh6 Bxf3 20.Qxf3 1.0 minute analysis by Stockfish 8

Nov-09-17		Bubo bubo: Found the first two moves quickly, but then I got stuck, completely missing 23.Nc5+ (I only considered 23.Qh4+ and 23.Nxd6+)

Nov-09-17		cormier: click for larger view Analysis by Houdini 4 7...d6 8.a3 Bc5 9.Bxc5 dxc5 10.Nb3 Qh4+ 11.g3 Qe7 12.Qc2 a5 13.Nf3 f6 14.Nbd2 Be6 15.Bg2 Nd7 16.0-0 0-0-0 17.Rae1 Kb8 18.e5 fxe5 19.Ng5 Nd4 20.Qe4 c6 21.Nxe6 Qxe6 22.Nf3 a4 23.Nxe5 Nf6 24.Qd3 Rhe8 25.Rf2 Ng4 26.Rd2 Qh6 27.h4 Nxe5 28.Rxe5 Rxe5 29.fxe5 = (-0.17) Depth: 27

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