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< Earlier Kibitzing · PAGE 2 OF 2 ·
Later Kibitzing> |
| Feb-28-18 | | Elrathia Kingi: I feel like the exact same position was a puzzle here not long ago, but I can't immediately find it. Perhaps I saw this somewhere else... |
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| Feb-28-18 | | Mayankk: White Queen needs a clear path to attack the Black King. So the knight needs to sacrifice itself. There are two possibilities - g5 and f6. g5 doesn’t appear lucrative as there is no immediate check available from Queen after that. Sacrificing on f6 allows Queen a check from g6, forcing Black’s response and we have an unavoidable mate once White’s light-squared Bishop joins the fun at e4. Straightforward and logical puzzle. |
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| Feb-28-18 | | mel gibson: I wish I would have looked a little longer
as I didn't see it.
Stockfish 8 says:
(19. Nf6+
(♘e4-f6+ ♕d8xf6 ♖f1xf6 ♗g7xf6 ♕d3-g6+
♗f6-g7 ♗g2-e4 ♘f7-h8 ♕g6-h7+ ♔g8-f7 ♖a1-f1+ ♔f7-e8 ♕h7xg7 ♖f8xf1+ ♔g1xf1
♗c8-h3+ ♔f1-g1 ♖a8-d8 ♕g7xh6 ♘h8-f7 ♕h6xh3 ♖d8-d7 ♕h3-e6+ ♔e8-d8 ♗e4-f5
♖d7-c7 ♗f5-g6 e5-e4 ♗g6xf7 ♖c7xf7 ♕e6xf7 b7-b6 ♕f7xa7 e4-e3 ♕a7xb6+ ♔d8-d7
♕b6-b7+ ♔d7-d6 ♗b2-a3+ ♔d6-e6 ♕b7-e7+ ♔e6-f5 ♕e7xe3 ♔f5-g6 ♕e3-e6+ ♔g6-g7
♕e6-d7+ ♔g7-g6) +20.52/25 205)
score for White +20.52 depth 25 |
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| Feb-28-18 | | gofer: I looked at <19 Ba3 Re8 20 Rxf7 Kxf7 21 Nd6+ etc> but it didn't seem to much more than equality. So, I thought this is a <Wdenesday>! There must be something nice I am missing. After that it wasn't too long to find the simple forced sequence... <19 Nf6+ Bxf6>
<20 Qg6+ ...>
20 ... Kh8
21 Be4 Bf5
22 Bxf5 any move
23 Qh7#
<20 ... Bg7>
<21 Be4 Bf5!>
This puts up more resistance, but its a horrible thing to have to try... <22 Bxf5 ...>
22 ... Nd6
23 Qh7+ Kf7
24 Bg4+!!! ...
24 ... Ke7
25 Qxg7+ Nf7 (Rf7? Qxe5+ Kf8 27 Qh8+ Ke7 28 Rae1+ Ne4 29 Rxe4+ Kd6 30 Qe5#) 26 Ba3+!! Qd6 (Ke8 Qxf8#)
27 Rxf7+ Rxf7
28 Bxd6+! Kd8/Ke8 (Kxd6 Qxe5#)
29 Qg8+ Rf8
30 Qxf8#
24 ... Ke8
25 Rxf8+ Kxe8 (Bxf8 26 Bh5+ Nf7 27 Qxf7#)
26 Rf1+ Bf6 (Ke8 Qg8+ Ke7 Qxg7+ transposes to Ke7 27 Qxg7+ Nf7 28 Rxf7+ Kd6 (Ke8 Rf8#) 29 Qxe5#) 27 dxe5 Qe7 (any knight move Ba3+! mating soon)
28 Qh8+ Kf7
29 Rxf6+ Qxf6
30 Kb8 exd6 (Ke8 exd6 any move Qe7#)
31 any move Qg7#
<22 ... Re8>
<23 Qh7+ Kf8>
<24 Bg6 Re7>
<23 Rxf7+ Rxf7> <24 Bxf7 Kxf7>
<25 Rf1+ +->
Black survives for a little longer, but not much... |
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| Feb-28-18 | | cocker: Big jump in difficulty from yesterday, so many of us missed it. |
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| Feb-28-18 | | ChessHigherCat: Knight (e-knight) mate? |
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| Feb-28-18 | | morfishine: Black gets whacked
***** |
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| Feb-28-18 | | Pasker: Honestly I couldn't solve this one. I was not in a good mood though. |
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| Feb-28-18 | | patzer2: <An Englishman: Good Evening: The combination only exists thanks to 18...e5 allowing the immediate refutation, but finding meaningful improvements seems quite a challenge.>
That's right! Clearly 18...e5?, allowing 19. Nf6+! +- with a mating attack, made it too easy for White. Instead, 18...Nd6 forces White to find 19. Nc5 ± to +- and work much harder for the win after 19...Bf5 20. Qe2 Qc8 21. c4 ± to +- (+1.53 @ 32 ply, Stockfish 8). |
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| Feb-28-18 | | lzromeu: Ba3, sac the rook and fork the queen
19. Ba3 Re8 20. Rxf7 Kxf7 21. Nd6+
or
19. Ba3 Re8 20. Rxf7 Bf8 21. Nf6+ Qxf6 22. Rxf6 Bg7 23. Qg6 Rf8 24. Bxf8 Kh8 25. Qxg7# |
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| Feb-28-18 | | njchess: When I first saw this position, I thought it was some sort of Dutch defense gone very wrong. Not only is Black's knight poorly positioned on f7 rather than f6, but White also firmly controls the e4 square. Given the above, I thought it strange that Black played e5, which must have felt natural enough to play, but only weakens his tenuous position further. White crushes it with 19. ♘f6+!. Game over. Tricky if you don't know the Dutch. Good Wednesday puzzle. |
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| Feb-28-18 | | 5hrsolver: For a while I was trying to make the line
19. Ba3 Re8 20. Rxf7 Kxf7 21. Nd6+ But could not find a good continuation and too hard for a Wednesday. Went back to the problem after some time and found the game line quickly. It helps to step back and refresh your mind. |
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| Feb-28-18 | | ChessHigherCat: The tricky thing about this puzzle is that when you look at it you immediately think "if only the knight could give check on f6 then Qh7#, so you keep trying to find ways of diverting the B on g7 and the Q on d8 and give up in frustration. What you have to see is that Ng7+ is just an intermediate move that forces Nxf6 and Qg6+ (like a starlet using a fellow actor to meet a director before dumping the actor, etc.) Such is the Machivellian morality we learn from chess. |
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| Feb-28-18 | | tatarch: <5hrsolver: For a while I was trying to make the line 19. Ba3 Re8 20. Rxf7 Kxf7 21. Nd6+ But could not find a good continuation and too hard for a Wednesday. Went back to the problem after some time and found the game line quickly. It helps to step back and refresh your mind.> I got lost down this rabbit hole too. Good puzzle. |
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Feb-28-18
 | | doubledrooks: 19.Nf6+ Bxf6 20.Qg6+ Bg7 21.Be4 works for me. |
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| Feb-28-18 | | ChessHigherCat: A corrected version for Posterity (my cat):
The tricky thing about this puzzle is that when you look at it you immediately think "if only the knight could give check on f6 then Qh7#, so you keep trying to find ways of diverting the B on g7 and the Q on d8 and give up in frustration. What you have to see is that Nf6+ is just an intermediate move that forces Nxf6 and allows Qg6+ (like a starlet using a fellow actor to meet a director before dumping the actor, etc.) Such is the Machiavellian morality we learn from chess. |
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| Feb-28-18 | | cormier: 
click for larger viewAnalysis by Houdini 4
14.Qe2 a5 15.a4 f4 16.exf4 gxf4 17.Rfe1 Bf5 18.Nd3 Bxd3 19.Qxd3 Qc7 20.Nf1 Rae8 21.c4 dxc4 22.bxc4 Nh5 23.Qb3 fxg3 24.hxg3 Nxg3 25.Nxg3 Qxg3 26.Qxb7 Rb8
⩲ (0.52) Depth: 16
14.Nd3 a5 15.a4 b6 16.Qe2 g4 17.c4 gxf3 18.Nxf3 Ne4 19.Rac1 Ba6 20.Nd2 Nfg5 21.Nxe4 Nxe4 22.Bxe4 fxe4 23.Rxf8+ Qxf8 24.Rf1 Qc8 25.Nf4 Bb7 26.Kg2 Qd7 27.cxd5 cxd5
+ / = (0.57) Depth: 21 |
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| Feb-28-18 | | cormier: 
click for larger viewAnalysis by Houdini 4: d 22 dpa
1. = (0.18): 13...f4 14.gxf4 gxf4 15.e4 Nd7 16.Bh3 e5 17.Bxd7 Bxd7 18.dxe5 Bxe5 19.Bxe5 Qg5+ 20.Kh1 Qxe5 21.c4 Rad8 22.Rc1 dxe4 23.fxe4 Be8 24.Nf3 Qh5 25.Rg1+ Bg6 26.Qe2 Rfe8 27.e5 Rxe5 28.Qxe5 Qxf3+ 29.Rg2 Nf7 30.Qa5 Qe3 31.Re1 Qd4 32.Re4 2. + / = (0.29): 13...a5 14.a4 f4 15.gxf4 gxf4 16.e4 Nh5 17.Qe2 c5 18.c3 cxd4 19.cxd4 Qb6 20.Qd3 Be6 21.Rac1 Rac8 22.exd5 Bxd5 23.Rc5 e6 24.Rfc1 Qb4 25.Nde4 Rxc5 26.Nxc5 Nf5 27.Bc3 Qa3 |
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| Feb-28-18 | | cormier: 
click for larger viewAnalysis by Houdini 4
13.c4 a5 14.a4 f4 15.exf4 gxf4 16.Nxf4 Bh6 17.Nd3 Be3+ 18.Kh1 Nf5 19.cxd5 Nxd5 20.Nc4 Bxd4 21.Bxd4 Nxd4 22.Nc5 Nb4 23.Nb6 Qxb6 24.Qxd4 Rd8 25.Qc4+ Rd5 26.Rac1 Qd8 27.Rfe1 b6 28.Ne6 Bxe6 29.Rxe6 Nd3 30.Rc3 Nb4 31.f4 Rd1+ 32.Re1+ Kg7
+ / = (0.55) Depth: 22 |
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| Feb-28-18 | | cormier: 
click for larger viewAnalysis by Houdini 4
12...e6 13.Qe2
+ / = (0.45 --) Depth: 11
12...Be6 13.Qe2 Bf7 14.a4 a5 15.Rae1 Be6 16.Rc1 Qc7 17.c4 Rad8 18.c5
+ / = (0.38) Depth: 12
12...a5 13.c4 b6 14.Rc1 Qc7 15.f4 Ba6 16.Ne5 Qb7 17.Qe2 Nfe4 18.Nxe4 Nxe4 19.Bxe4 fxe4 20.Rcd1 a4 21.Qg4 axb3 22.Qe6+ Kh8 23.axb3 Bxe5 24.dxe5
+ / = (0.39) Depth: 16
12...b6 13.c4 a5 14.Ne5 Bb7 15.Rc1 Qc7 16.f4 e6 17.Qc2 Nf7 18.Rfe1 Rfe8 19.Ndf3 Ne4 20.cxd5 exd5 21.Red1 Rac8 22.Nxf7 Qxf7 23.Ne5 Qe6 24.Bxe4 fxe4
+ / = (0.32) Depth: 22 |
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| Feb-28-18 | | cormier: 
click for larger viewAnalysis by Houdini 4
12.c4 Be6 13.c5 Nde4 14.Qc2 Qa5 15.Nf3 Nd7 16.a4 Rad8 17.b4 Qc7 18.a5 a6 19.h4 Ndf6 20.Nfe5 Ng4 21.Nf4 Bf7 22.Nxg4 fxg4 23.Bxe4 dxe4 24.Qxe4
+ / = (0.48) Depth: 22
12.Nf3 a5 13.a4 Nf7 14.c4 Ne4 15.Qc2 b6 16.Rfc1 e6 17.cxd5 cxd5 18.Ba3 Re8 19.Nde5 Ba6 20.Nxf7 Kxf7 21.Qc7+ Qxc7 22.Rxc7+ Kg8 23.Rc6 Rab8 24.Rac1 Bd3 25.Ne5 Bxe5 26.dxe5
+ / = (0.49) Depth: 22
12.a4 a5 13.c4 b6 14.Nf3 Nf7 15.Nfe5 Nxe5 16.Nxe5 Bb7 17.Rc1 Rc8 18.Ba3 c5 19.dxc5 bxc5 20.Nd3 Qb6 21.cxd5 Bxd5 22.Bxd5+ Nxd5 23.Rxc5 Rfd8 24.Qc2 Rxc5 25.Bxc5 Qe6 26.Rc1 Rc8 27.Qd2
+ / = (0.50) Depth: 23 |
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| Feb-28-18 | | cormier: 
click for larger viewAnalysis by Houdini 4
11...Ne4 12.a4 Ndf6 13.Nf3 a6 14.Qe2 a5 15.Nfe5 Ng4 16.f3 Nxe5 17.Nxe5 Ng5 18.Rac1 Be6 19.Nd3 Qc7 20.h4 Nf7 21.Nf4 Qd6 22.h5 g5 23.Nxe6 Qxe6
+ / = (0.57) Depth: 20
11...Re8 12.c4 dxc4 13.bxc4 e5 14.dxe5 Nxe5 15.Nxe5 Bxe5 16.Bxe5 Rxe5 17.Qc2 Re8 18.c5 Nf7 19.Nb3 Qe7 20.Rad1 Ne5 21.Qc3 Nf7 22.Nd4 Ne5 23.Rfe1 Qf7 24.Re2 Qc4 25.Qa5 Bd7
+ / = (0.45) Depth: 22 |
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| Feb-28-18 | | cormier: 
click for larger viewAnalysis by Houdini 4
10...Re8 11.f3 Nd6 12.f4 a5 13.a4 b6 14.Nd2 e6 15.c4 Ba6 16.Ne5 Qc7 17.Qe2 Nxe5 18.dxe5 Ne4 19.Nxe4 dxe4 20.Rfd1 Rad8 21.Rxd8 Rxd8 22.Rd1 Rxd1+ 23.Qxd1 c5
= (0.15) Depth: 22 |
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| Feb-28-18 | | PJs Studio: I tried to find this and was lazy. Gave up in 20 seconds. I may have missed this OTB... not sure. Certainly don’t think I’ve seen this three move combo before. |
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| Feb-28-18 | | zb2cr: I saw that if the White Knight vacated e4, White's Bishop could take up a post there. From there, it only took about a minute's thought to find a useful way of moving the Knight with 19. Nf6+, Bxf6; 20. Qg6+, Bg7 (else White wins back the sacrificed piece with a strengthened position). Then, 21. Be4! and Black has to sacrifice 21. ... Bf5 to stop mate. After 22. Bxf5 White has won back the sacrificed piece with a strong attack. Black must play either 22. ... Nd6 or 22. ... Re8 with consequences that others further up-thread have outlined. |
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Kibitzing
sac: 19.Nf6+