|
< Earlier Kibitzing · PAGE 3 OF 3 ·
Later Kibitzing> |
| Oct-26-12 | | kevin86: The knight sac brings in the forces needed for victory. |
|
| Oct-26-12 | | BOSTER: The bold white pawn e5 crossed the border and created the pressure on f6 and d6. Black pos.is too cramped.
In this pos. where white played 19.Rc4 moving the rook c4 on the same line with queen e2 I'd try 19...Nxe5 and then Bb5.
click for larger view |
|
| Oct-26-12 | | King Sacrificer: I can't even see the finish if 26...Kh6 |
|
| Oct-26-12 | | bachbeet: I'm also having a hard time seeing why he resigned because I really don't see a strong continuation for white after black refuses the pawn at e6 and moves the king to e7. |
|
| Oct-26-12 | | Patriot: The only candidate I see that "could" lead to a win is 25.Nxh7. However, I'm just not seeing it. White can win a few pawns for the knight and run the king toward the queenside but this does not look promising. One idea I had was to get the dark-square bishop involved with Bd4 at the right moment. 25.Nxh7 Kxh7 26.Ng5+ Kg8 27.Qh5 Qd7 28.Bd4 Na4 and then what? Or 27...Qc7 28.Bd4 Nd7 and what? I give up on this... |
|
Oct-26-12
 | | Phony Benoni: <bachbeet> If Black plays <31...Ke7> in the final position:
click for larger viewWhite at the very least can just play 32.exd7 followed by 33.Qxg7, when he is a pawn up and is swarming around Black's king. Perhaps even better is 32.exf7, when White will end up two pawns ahead after 32...Bxf7 33.Qxg7 while maintaining his attack. Is this a slam-bam-check-check-mate win? Not quite. But if you play around with the position for a few minutes, it quickly becomes hopeless for Black. |
|
| Oct-26-12 | | Patriot: <<Conrad93>: I guess I was right. The puzzle is far more difficult if black ignores the knight sacrifice.> I think just the opposite--white is a clear pawn up for nothing. I never bother calculating where the sac is declined unless there is another piece hanging or there is some kind of counter-attack. Otherwise you can just say "thanks for the pawn". |
|
| Oct-26-12 | | Patriot: It took Houdini over 3 minutes and 21-ply to find 25.Nxh7! I don't feel so bad after all... |
|
| Oct-26-12 | | agb2002: The material is equal.
The first move that comes to mind is 25.Nxh7:
A) 25... Kxh7 26.Ng5+
A.1) 26... Kg8 27.Qh5
A.1.a) 27... Qd8 28.Qh7+ Kf8 29.Qh8+ Ke7 30.Qxg7 with two pawns for the knight and many threats (Bh3-Bxe6, h5-h6-h7-h8=Q, Bd4, etc.). A.1.b) 27... Qd7 28.Bd4 Na4 29.Qh7+ is similar to A.1.a. A.1.c) 27... Qc7 28.Bd4 Na4 29.Bxd5 exd5 30.e6 looks bad for Black. A.2) 26... Kg6 27.Qe4+ f5 28.exf6+ Kh5 29.Qh7+ Kg4 30.Bf3#. A.3) 26... Kh6 27.Qd2 g6 28.Nxe6+ Kh7 29.Ng5+ Kg8 30.Bxd5 Qd7 (pinning the bishop) 31.Bxf7+ Bxf7 32.Qxd7 Nxd7 33.e6 Bxe6 34.Nxe6 + - [2P]. A.4) 26... Kh8 27.Qh5+ and mate in two.
B) 25... f6 26.Qc2 with the idea of trading queens to eliminate a defender of f6, unclear. In spite of 25... f6, trapping the knight, I think I'd play 25.Nxh7. |
|
| Oct-26-12 | | Moonwalker: Out of my league! In a real game I'd play 25.Bd4.. |
|
| Oct-26-12 | | Conrad93: The point, Patriot, is that the task would not be as obvious if black denied the sacrifice. By denying the sacrifice, he is forcing white to be more accurate and aggressive. |
|
| Oct-26-12 | | Patriot: <Conrad93> <The point, Patriot, is that the task would not be as obvious if black denied the sacrifice.> I understand what you're saying and it may even be the best idea for black, but it's a waste of time calculating it from white's perspective. Black is the one that really needs to determine the risk involved in accepting the sac (if white decides to actually take on h7). <agb2002> only points out 25...f6 for the decline, to snag the knight on black's own terms which may have some merit. I don't think there is much else to cause concern though. |
|
| Oct-27-12 | | rilkefan: <<King Sacrificer>: I can't even see the finish if 26...Kh6> As I noted above, stockfish thinks this is the strongest defense, relatively speaking. I had planned to reply Bc1, but that turns out not to be good after ...g6 (compared to the line below Nxe6 doesn't work since d5 is strong here). Instead sf plays 27.Qd2, with main line ...f5 28.Nxe6+ f4 29.Bxd5 with a complex position though +2 or 27...g6 28.Nxe6+ and ditto. |
|
| Oct-27-12 | | Conrad93: Patriot, the puzzle would be more difficult and interesting if black denied the sacrifice. |
|
| Oct-27-12 | | Abdel Irada: <JG27Pyth>: <<whiteshark>:"Unzicker lacks a sense of danger here" -- Maybe, but I highly doubt that -- alarm bells go off even for a C-player when someone sacs a N on h7.> At the risk of misinterpreting <whiteshark>'s comment (and if I have, I'm sure he can correct me): Danger is indeed obvious after the knight sac. What I think <whiteshark> referred to was the preparatory moves, in particular h4, whose purpose is obvious in retrospect and to alert observers: to set up the sacrifice by enabling the second knight to move to g5. |
|
| Oct-29-12 | | Conrad93: The sacrifice is easy to spot, but the combination is far more difficult to figure out. |
|
| Apr-10-25 | | King.Arthur.Brazil: The king chose 25. Nxh7 Kxh7 26. Ng5+ Kg8 27. Qh5 f5 28. Qh7+ Kf8 29. Qh8#. Refusing: 25... Bb5 26. Qe4 Nc4 27. Bd4 Nxa3 28. Nhg5 g6 29. h5 Nxb4 30. hxg6 fxg6 31. Qxg6+ Qg7 32. Qxe6+ Kf8 33. Qc8+., etc. B is defenseless in the K-side. |
|
Apr-10-25
 | | Breunor: First move is obvious, but following up correctly isn't! |
|
| Apr-10-25 | | Walter Glattke: After 25. -f6 26.exf6 gxf6 27.Nxf6+ Nxf6+ 28.Bxf6 Qxf6 29.Ng5 the black position was totally defenseless. |
|
| Apr-10-25 | | stacase: I got the first 3 moves, so I'm happy. |
|
| Apr-10-25 | | mel gibson: The first few plies were easy but there was no fast checkmate. Stockfish 17 says:
25. Nxh7
(25. Nxh7 (1.Nxh7 Qc7 2.Nhg5 Qc4 3.Qd2 Na4 4.Bf1 Qb3 5.Qc1 Nac3 6.Nd2 Qd1 7.Qxd1
Nxd1 8.Bd4 N1c3 9.Nge4 Nxe4 10.Nxe4 Bc6 11.Bd3 Bc7 12.Kf1 Ne7 13.f4 Bd8
14.Bf2 Nd5 ) +2.31/51 309)
score for White +2.31 depth 51. |
|
| Apr-10-25 | | Walter Glattke: IM Ribli plays the Classic Bishop Victim with a knight on top: Surprise for ne and GM Unzicker. Normal is Bxh7+ - Ng5+ Qh5 |
|
Apr-10-25
 | | Check It Out: I saw the general themes but in no way got the combination. |
|
Apr-10-25
 | | chrisowen: Wu cant its skimp for its hq dj leg its z Nxh7 ado its no its cob i its efface its aae its key its ao its ebb duh its aao its ko its ajar Nxh7 its etc; |
|
| Apr-10-25 | | cocker: Medium/impossible |
|
 |
|
|
< Earlier Kibitzing · PAGE 3 OF 3 ·
Later Kibitzing> |
Kibitzing
Annotations by 
sac: 25.Nxh7
