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| Feb-07-09 | | kkshethin: First???. I thought first move of this nice puzzle, but alss, no further |
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| Feb-07-09 | | SamAtoms1980: Nxh7 AGAIN? For the second day in a row?! Are you kidding me?! |
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| Feb-07-09 | | Once: Could we really have the same first move to two puzzles in a row? Just like yesterday (all my troubles seemed so far away) 19. Nxh7 demands to be considered. Here's the unplugged version:
click for larger viewAt first glance there seems to be no way through black's defensive pawns. But white crashes through with 1. Nxh7 followed by 2. Qxg6. The trick here is to find the right follow-up. Note that the tempting 21. Qxc2??? puts black right back in the driving seat with 21...Rg8. 21. Bg5 stops 21...Rg8 because the rook is needed to prevent 22.Bxf6+. |
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Feb-07-09
 | | Frankygolucky: Why does black not play 14. ..,Bxh4? |
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| Feb-07-09 | | rookattack: How does white reply 23.. Qg7? |
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| Feb-07-09 | | Shams: <Frankygolucky> as free pawns go, the h-pawn is pricey. sample line 14...♗xh4 15.♘xh4 ♕xh4 16.♖e4 ♕d8 [16...♕e7 offends black's ♘c6 but is probably best] 17.♕h5 g6 18.♕h6 with a winning chokehold on the dark squares; I don't see a defense to ♖h4 mating quickly. |
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| Feb-07-09 | | Shams: <rookattack:>< How does white reply 23.. Qg7?> with 24.♕h5+ ♔g8 25.♖g6 |
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| Feb-07-09 | | Gilmoy: <Frankygolucky: Why does black not play 14..Bxh4?> When a GM offers a free pawn, you should look deeper than 2-ply. Black is already missing his Nf6 <strongest K-side defender>. White has a Rook lift coming for a 5-on-1 Kingside attack. White is happy to trade his Nf3 for the Be7, and throw in a pawn, for a 4-on-0 whirlwind. Sample: 14..Bxh4 15.Nxh4 Qxh4 16.Re4 <see, now White gets the Rook lift for free> Qe7 (Qf6 17.Rf4) 17.Qh5 and White can probably sac about 2 more pieces and still mate with the other 3. |
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| Feb-07-09 | | Gilmoy: <Shams: ... I don't see a defense to Rh4 mating quickly.> Qe7, g6, (f6,f5) adequately protects h7 sideways, and even stymies White's DSB: Bg5 Qd7, or Bh6 Rf7. White has other ideas after 17..g6, e.g. 18.Rg4 pin, or 18.Qh3 to defend g2 and double on e6 (which discourages f6). |
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| Feb-07-09 | | moi: What is wrong with this:
21 Nxf8 Qxf8
22 Rxe6 Nxa1
23 Rxf6 
Seems more direct to me. |
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| Feb-07-09 | | Samagonka: The first move was easy to get. The rest requires good calculation but is fairly doable too. |
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Feb-07-09
 | | Honza Cervenka: <moi: What is wrong with this:
21 Nxf8 Qxf8
22 Rxe6 Nxa1
23 Rxf6
Seems more direct to me.>
22...Qg7 with equality is much better here. |
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| Feb-07-09 | | patzer2: Today's Saturday puzzle solution of 19. Nxh7!! continues the demolition of pawn structure theme from yesterday's puzzle, but with no less difficulty. <Terry McCracken: Deja vu! 19. Nxh7! Nice Combination> Yes, indeed it is a nice but difficult combination! As with many demolition combinations, this combo involves a variety of other tactical themes in calculating all the possible variations and side lines. Here, for example, white neatly combines the demolition, deflection, decoy, overloading of pieces, mate threat, knight fork and pin tactics. Sometimes when I see a super GM like Sokolov so easily pull off such a combination, I feel like a beginning pianno student, who has learned a few chords (basic tactics), watching a maestro play a full concert. |
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| Feb-07-09 | | patzer2: In the final position, after 28...Rf8 29. Rxf8 Qxf8 30. Ne6+, White picks off the Queen with a Knight Fork. He will also pick off another piece following 30...Kg8 31. Nxf8 Kxf8, with either the double attack 32. Qf5+ or a skewer after 32. Qh8+ Ke7 33. Qh7+. |
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| Feb-07-09 | | johnlspouge: Saturday (Very Difficult)
A Sokolov vs A Kharitonov, 1990 (19.?) White to play and win.
Material: Down a P. The Black Kg8 has 2 legal moves, both dark squares. The Black Rc8 pins Pc3 to the loose Bc2. Without the pin, Pc3 could take Nd4. White has a local superiority on the Black K-side, with Ng5 attacking Ph7, Qg5 in the area, and Bc2 and Bc1 on adjacent diagonals. The Black P-chain on the K-side is therefore under extreme pressure. The White Re1 and Ng5 both attack Pe6, so only the White Ra1 requires activation. The White Kg1 is open to checks from Nd4, but is otherwise presently secure. Candidates (19.): Nxh7
19.Nxh7 (threatening 20.Qxg6+ winning a P)
Because Pg6 will fall, Black must capture to retain material equality. Presently, Nh7 is immune: (1) 19…Kxh7 20.Qxg6+ Kh8 21.Qh7#
Thus,
(2) 19…Nxc2 20.Qxg6+
(2.1) 21…Bg2 22.Ng5
White has several threats:
(A) 23.Qh7# or (B) 23.Qh7+ Kf8 24.Nxe6+ or (C) 23.Qxe6+ Kh8 24.Nf7+ Black responds
22…Re8 <[Toga II 1.3.1 gives 22…Rf6 as best, at +2.0 Ps for White]> 23.Qxc2 wins material.
(1.2) 21…Kh8
<[Here, I went for 22.Nxf8, which Toga evaluates as 0.5 Ps, good but not winning.]> |
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| Feb-07-09 | | johnlspouge: < <dzechiel> wrote: Wow, cool ending! > < <patzer2> wrote: [snip] I feel like a beginning pianno student, who has learned a few chords (basic tactics), watching a maestro play a full concert. > I agree. The final moves of the combination splay the White pieces across the board, but somehow they coordinate to encircle the Black K. It is an amazing effect. |
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| Feb-07-09 | | WhiteRook48: I thought about 19 Bxg6, but missed again |
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| Feb-07-09 | | patzer2: Perhaps Black's decisive error was 18...fxg6?
Instead, 18...hxg6 19. Qh4 Bxg5 20. Bxg5 Qxg5! 21. Qxg5 Nxc2 22. Rxe6 Nxa1 23. Re7 b4 24. Rxb7 bxc3 25. Rb1 Nc2  looks to hold for Black. |
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| Feb-07-09 | | cyclon: Masterful. Long and difficult. |
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| Feb-07-09 | | whiteshark: <19.Nxh7 Nxc2 20.Qxg6+ Bg7 21.Ng5 Rf6> (to free flight square f8) <22.Qh7+ Kf8 23.Qxc2 Qd5> (counter threat is 24...Qxg2#) <24.Ba3+ Ke8 25.Ne4> (blocking a8-h1 diagonal) <25...Rh6 26.Rad1 Rxc3 27.Qxc3 Bxc3 28.Rxd5 Bxe1 29.Nd6+ Kd7 30.Rd1 Bd5 31.Rxe1> Easy :D |
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| Feb-07-09 | | agb2002: I don’t have time to analyze this position as it deserves, so I’ll just try 19.Nxh7: A) 19... Kxh7 20.Qxg6+ Kh8 21.Qh7#.
B) 19... Nxc2 20.Qxg6+
B.1) 20... Kh8 21.Bg5 (21.Nxf8 Qxf8 22.Qxc2 Qg7)
B.1.a) 21... Nxe1 22.Nxf6 threatening 23.Qh7# and 23.Qh6+. B.1.b) 21... Bxg5 22.Nxg5
B.1.b.i) 22... Qe7 23.Qh6+ Kg8 24.Rxe6 Rc7 25.Rg6+ Qg7 26.Qh7#. B.1.b.ii) 22... Qd7 23.Qh6+ Kg8 24.Rxe6 Rf7 25.Rg6+ Rg7 26.Qh7+ Kf8 27.Qh8+ wins. B.1.b.iii) 22... Rc7 23.Qh6+ Kg8 24.Rxe6 Rff7 25.Rg6+ Rg7 26.Qh7+ Kf8 27.Qh8+ wins. B.1.c) 21... Qe8 22.Bxf6+ Rxf6 23.Qxf6+ Kxh7 24.Rxe6 Rc6 25.Re7+ winning. B.2) 20... Bg7 21.Ng5
B.2.a) 21... Qxg5 22.Bxg5 Nxa1 23.Rxa1 with Q+P vs. R+B. B.2.b) 21... Rf6 22.Qh7+ Kf8 23.Qxc2 threatening Nxe6+, Nh7+, Ba3+, Rxe6, etc. C) 19... Rf7 20.Qxg6+
C.1) 20... Kh8 21.Qxf7 Nxc2 22.Nxf6 Rc7 23.Qh5+ Kg7 24.Bh6+ Kxf6 25.Qg5+ Kf7 26.Qg7+ Ke8 27.Qg8+ Kd(e)7 28.Qxe6#. C.2) 20... Rg7 21.Nxf6+ Kf8 (21... Kh8 22.Qh6+) 22.Bh6 threatening cxd4 and Q(B)xg7. C.3) 20... Bg7 21.cxd4 and White is a piece and a pawn ahead. D) 19... Re8 20.Qxg6+ Bg7 21.cxd4 with a piece and a pawn up. Now a quick check.
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| Feb-07-09 | | agb2002: 23.Rxe6 as played in the game seems stronger than my line B.1.b.ii). I saw the move ... Rc6 but in another line (B.1.c). However, if 24... Rc6 instead of 24... Rf7 in B.1.b.ii) then 25.Rc1 is probably enough to win, for example: 25... Na3 26.Rce1 Qg7 27.Rxc6 Bxc6 28.Qxc6 Qxg5 29.Re3 Rf6 30.Qe8+ Kh7 31.Re7+ etc. |
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| Feb-07-09 | | tacticalmonster: Nice pizzle! As this is always the case, I only manage to solve most of the problem On Sat and Sun. I figure 19 Nxh7 Nxc2 20 Qxg6+ Kh8 21 Bg5! BxB 22 Nxg5 Qd7 23 Rxe6 Rc6 and I am stuck. totally miss the point 24 Qh5+ with the threat of Rd1 deflecting the queen. Move 24 is probably the hardest part of the pizzle. |
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| Feb-07-09 | | tacticalmonster: This pizzle remind me of Morphy's game. Very artistic in that every white piece takes part in the final attack against black king. Amazing coordination! Hard to believe at the beginning white pieces were scattered all over the board. |
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| Feb-07-09 | | Ladolcevita: gOT IT. |
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Later Kibitzing> |
Kibitzing
sac: 19.Nxh7