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| Jan-22-17 | | jd4chess: Stockfish says that black missed a draw as late as 32 ... Qa2 though white missed a clearer win earlier on, 24 Rg7 being a big improvement. |
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Jan-22-17
 | | agb2002: The material is identical.
Black threatens hxg5 and bxa4-Bb5.
White has Nxf7 and Bxh6.
In the case of 20.Nxf7 Kxf7 21.Qxe6+ Kf8 22.Bc4 Bd5 the attack seems to vanish. In the case of 20.Bxh6:
A) 20... gxh6 21.Rg3+ Kf8 (21... Kh8 22.Nxf7#; 21... Ng4 22.Qxg4+ Bg5 23.hxg5 wins) 22.Qe3 A.1) 22... Ng8 23.Bh7 Bd6 (23... Nf6 24.Qxh6#) 24.Rxg8+ Ke7 25.Ng6+ Kd7 (25... fxg6 26.Qxe6#) 26.Rg7 looks winning. For example, 26... bxa4 27.Rxf7+ Be7 28.Qxe6+ wins decisive material. A.2) 22... Bd6 23.Qxh6+ Ke7 24.Nxf7
A.2.a) 24... Kxf7 25.Qg7#.
A.2.b) 24... Qd7 25.Nxd6
A.2.b.i) 25... Kxd6 26.Qf4+ (probably better than Qxf6) 26... e5 (26... Kd5 27.Qe5+ Kc4 28.Qc5#; 26... Ke7 27.Rg7+ Kf8 28.Qxf6+ Qf7 29.Qxf7#) 27.Qxf6+ followed by 28.dxe5 in any case and White emerges three pawns ahead at least. A.2.b.ii) 25... Qxd6 26.Qg7+ Kd8 27.Qxf6+ followed by axb5 and White is two pawns up at least. A.2.c) 24... Qc7 25.Nxd6 as in A.2.b.
A.3) 22... Ba3 23.Qxh6+ Ke7 24.Nxf7 looks similar to previous lines. For example, 24... Qd7 25.axb5 axb5 26.Ng5 Bd5 27.Qg7+ Kd8 28.Qxf6+ + - [N+3P vs B]. B) 20... bxa4 21.Rg3 g6 22.Nxf7 wins (22... Kxf7 23.Qxe6#; 22... Qd7 23.Bxg6 etc.). |
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| Jan-22-17 | | morfishine: Taimanov finished 3rd +9-2=8
...meanwhile Mikenas got batted around and beat up finishing next to last +3-9=7 ***** |
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| Jan-22-17 | | whiteshark: <In the case of 20.Nxf7 Kxf7 21.Qxe6+ Kf8 22.Bc4 Bd5 the attack seems to vanish.> I went for this line, missing the strength of <22...Bd5> :( |
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| Jan-22-17 | | Sularus: tried Nxf7 and did not even consider Bxh6 |
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| Jan-22-17 | | Clodhopper: I calculated the first 5 moves of this combo and thought, "Well, that can't be it..." |
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| Jan-22-17 | | YouRang: I guessed pretty quickly that we would see white break open the kingside with <20.Bxh6 gxh6 21.Rg3+>, especially once I noticed that 21...Kf8 was forced (21...Kh8 22.Nxf7#). The follow-up threats of 22.Qe3 and Qxh6+ looked pretty brutal, but it was beyond me to see how exactly it might go. Perhaps 20.Bxh6 is just one of those moves that you can tell is a "chance worth taking" without having to calculate all the variations. |
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| Jan-22-17 | | patzer2: There appears to be a cook to the game follow-up to this combination at move 32 for Black. Instead of 32...Qb2? 33. Bf5+  , Black holds after
32... Qa2! 33. Qf5+ Kd8 34. Rxe7 Bxe7 35. Bd3 axb5 36. Bxb5 Qa8+ 37. d5 Qc8 38. Qf7 Qc5 39. Bc6 Qd6 40. h5 Qf6 41. Qe8+ Kc7 42. Qd7+ Kb6 43. Qb7+
Kc5 44. Qb5+ Kd6 45. Qb8+ Kc5 46. Qb5+ Kd6 47. Qb8+ Kc5 48. Qb5+ Kd6 49. Qb8+ Kc5 50. Qb5+ = (0.00 @ 22 depth, Deep Fritz 15) with a draw by repetition. P.S.: White has earlier improvements to avoid this. One early improvement is 21. Qd2
Ng4 (21...Ne4 22. Qxh6 ) 22. Rg3 (+8.13 @ 22 depth,Houdini 4). |
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Jan-22-17
 | | ChessHigherCat: < jd4chess: Stockfish says that ...white missed a clearer win earlier on, 24 Rg7 being a big improvement.> If 24. Rg7 Rf8 then 25. Ng6+ is obviously good for white but what if 24. Rg7 Bxe5, 25. dxe5 Nd7, does the engine suggest 26. Bg6 or what? It looks like black's in the pressure cooker but I don't see any immediate win if that's the line of your silicon friend (not to be confused with "silicone friends", as some contributors mistakenly put, which refers to the waitresses at Hooters) |
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| Jan-22-17 | | ColeTrane: @jd4chess gracias por la breve explicación |
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Jan-22-17
 | | Jimfromprovidence: Because of 32...Qb2?, black puts himself in a mate in one threat after the text 34 Qb6. (seeing 35 Rf8#).
click for larger viewHis best move is to take the pawn with 34...Qxb6, allowing 35 Rxe7, winning for white. If 32...Qa2, black attacks the white rook, so if 33 Bf5+ Kd8 as in the text, below, white cannot play 34 b6 or he will lose his rook. 
click for larger viewAnd, if he tries 34 Rxe7, black can safely play 34...Bxe7. Now there are no queen checks as black controls g8 and white's queen itself is now under attack. 
click for larger view |
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Jan-22-17
| | ChessHigherCat: Hi <Jimfromprovidence> In the first diagram, think you're missing Rxg3+, (the f pawn is pinned and the g pawn is attacked by the B and R). |
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Jan-22-17
| | ChessHigherCat: But it's still tricky because white is threatening mate in 1 with the rook, as you say, so black can't simply play Rxg3, Qxg3, BxQ. What about 34...Ke8? If 35. Qf6 now Rxg3+ wins for black |
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Jan-22-17
| | ChessHigherCat: <ColeTrane: @jd4chess gracias por la breve explicación> Y las respuestas siguen haciendose cada vez más breves :-) |
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Jan-22-17
| | Jimfromprovidence: <ChessHigherCat> < What about 34...Ke8? If 35. Qf6 now Rxg3+ wins for black> There is the forced line 35 Rxe7+ Bxe7 (ends any potential attack on g3) 36 Qg6+ Kf8 37 Be6 that looks good. 
click for larger view |
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Jan-22-17
| | ChessHigherCat: <Jimfromprovidence: There is the forced line 35 Rxe7+ Bxe7 (ends any potential attack on g3) 36 Qg6+ Kf8 37 Be6 that looks good.> I'm not sure we're talking about the same position because Re7 isn't check in the game line or in your first diagram, so it allows Rg3+ as an intermezzo (if the Q stays on b2) |
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Jan-22-17
| | ChessHigherCat: Okay, I think I see what you mean: if black plays 34...Ke8 instead of Qxb6, now Rxe7 is check. Good point, I guess that refutes my idea of 34...Ke8 (waaah!) |
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Jan-22-17
 | | Sneaky: I went for 20 Nxf7 immediate, figuring that Qxe6+ would be plenty of compensation. Surely that's not a dual solution is it? Assuming it isn't, I can see why this is Sunday material. |
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| Jan-22-17 | | RKnight: There is an even stronger line for white, diverging from the game by 24. Rg7 (vs 24. Nxc6 as played). E.g. 24... Nd5, 25. Rxf7+ Kxf7, 26. Bg6+ and mate in 2 more. The other alternatives for black are not much better, as 24...Ng8 also leads to 25. Rxf7+ with mate in two moves. 24... Ne4 gives away material but postpones the mate. |
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Jan-22-17
 | | drollere: this middle game is just a mayhem of white pieces thrown like cobblestones at a congested mass of useless black pieces. the N and B do half the work on black's side. after 22. Qe3, Ng8 could be met with Rxg8+ Kxg8, Qxh6 and Bh7# to follow. i don't see why 35. ... Rxg3 (R for p?) instead of Bxe7 (winning the R outright) is not better for black. black resigns because he must lose the KB after Qc8+ Kd6 (forced), Qe6+ Kc7 Qxe7+. |
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| Jan-22-17 | | Cheapo by the Dozen: After <RKnight>'s idea of 24 Rg7, Black can try the simple 24 ... Bxe5. The question is whether he loses back the piece or not blocking the d-file as his king heads for the queenside; my guess is that he can hold on, and also hold on against the worst of the f7 threats (but he'll probably lose the f7 pawn itself). My inclination is actually 24 Nxf7, but I haven't worked through all of Black's options to minimize the damage. |
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| Jan-22-17 | | RKnight: <Cheapo by the Dozen> My bad, I didn't write down the line correctly: I meant 24. Rg7, Bxe5, 25. dxe5 Nd5, 26. Rxf7+ Kxf7, 27. Bg6+ and mate in 2 more. 24... Bxe5 was meant to be part of this line. White wins faster than in the game. |
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| Jan-22-17 | | johngalt5579: it seems the only real start is Nf7. but I cant follow it up. I would play it anyway just to see what would happen. |
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| Jan-22-17 | | johngalt5579: ok I'm wrong. but taimanov was a world class grandmaster in those days .as well as a concert pianist. I'm not a musician so I stand corrected. |
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| Jan-24-17 | | Morphys Law: 34. b6 would also make a good puzzle. |
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Kibitzing
sac: 20.Bxh6