Mar-28-14
 | | offramp: The Tarrasch. Is anyone still playing that? |
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| Mar-28-14 | | Bobby Spassky: "The Tarrasch. Is anyone still playing that?"
Wow! Trash talk about the Tarrasch. |
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| Mar-28-14 | | master of defence: Failed in this one. Went with 20.Qg8+, but couldn't achieve anything after 20...Ke7 21.Qxg7+ Rf7 22.Nxf7 Bxf7, when Black is probably better. But how does White proceed if 20...exf5 instead? |
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Mar-28-14
 | | MJCB: Wondered the same as "master of défense". On 20... exf5 (threat Rh6), maybe 21. Qh8+, Ke7, 22 Qxg7+, and if black covers the check with Bishop or Rook, then Re1+ trying to recover material while keeping the attack? Would be cool if Mr. Korneev, after reading some of our post, suddenly join the kibitz and tells us in fact what he had prepared :-) |
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| Mar-28-14 | | Nick46: I bet Yury was really cheesed off after that. |
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| Mar-28-14 | | morfishine: <master of defence> Or 20.Qh8+ Ke7 21.Qxg7+ Bf7 22.Nh5 Qxd4 I had the same question: If 20.Nf5 how does White proceed after 20...exf5 ***** |
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| Mar-28-14 | | Memethecat: <morfishine "how does white proceed after 20...exf5"> 21.Qh8+ Ke7 22.Qxg7+ Kd8 23.Qxf6+ looks pretty conclusive. |
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| Mar-28-14 | | Cheapo by the Dozen: One choice for White is
20 Nh5 Bxh5
21 Qh8+ Ke7
22 Qxa8
and both of 22 ... Nb8/Bb8 can be defanged by the White rook. Declining the sacrifice via 20 ... Rg6 doesn't look appealing for Black either, in the face of 21 Nxe6+ and 22 Nxg7, and other ways of averting mate at g7 just leave Black similarly down in material to the first line, but with less counterplay. Another choice is
20 Ne6+ Rxe6
21 Nf5 Rg6
but I don't see what White does from there, so I'd probably play the first version over the board and hope that Black's counterattack didn't turn out to be too brutal. |
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| Mar-28-14 | | Cheapo by the Dozen: Ack. Missed it. |
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| Mar-28-14 | | Patriot: White is up a pawn for a piece. Black threatens pawn on d4, b2, or possibly exchanging 20...Bxg3. 20...Rh6 may be bad for white's attack. 20.Qh8+ Ke7 21.Qxg7+
21...Rf7 22.Nf5+ exf5 23.Rfe1+ looks like an interesting attack. 21...Bf7 22.Nh6 may lead to removal of the guard. |
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| Mar-28-14 | | pedro99: "I had the same question: If 20.Nf5 how does White proceed after 20...exf5" *****
21.Qh8ch-Ke7 22.Qxg7ch-
a) 22...Rf7 23.Rfe1ch followed by 2 captures on f7 White will mate and/or pick up the rook on a8 b) 22...Bf7 23.Rfe1ch followed by 234.Qf6: and everything falls to bits Black can try interposing a minr piece after the Re1ch but white can pick up the rook and the pinned minor piece at leisure |
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| Mar-28-14 | | slapwa: I take it the point at the end is something like 24. …, Kd8; 25. Qe6, Qa4; 26. Qxd6+, Qd7; 27 Rxe8+, Kxe8; 28 Re1+, Kd8; 29 Qf8+ ? |
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| Mar-28-14 | | PJs Studio: 20.Nf5! opens lines for the Rf1 to cut off the kings escape square at e7. Black had no choice but to give up the Rook and the defense of e6 Well played by Korneev |
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| Mar-28-14 | | kevin86: I missed this one I went for the simple Qh8+ followed by Qxg7+ |
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| Mar-28-14 | | M.Hassan: "Difficult"
White to move 20.?
White has a pawn for a Bishop.
Worked hard on this and the line I could get is the following: 20.Qh8+ Ke7
21.Qxg7+
A) Defend with Bishop
21.........Bf7
22.Nh5 Rf8
23.Qxf6+ Kd7
24.Nxd7 Kc7
25.Qxe6
White has gained good material and more can come.
B)Defend with Rook:
21..........Rf7
22.Nxf7 Bxf7
23.Nf5+ exf5
24.Rfe1+ Kd8
25.Qxf7 threatening mate by Rook to e8
25..........Ne7
26.Qf8+ Kd7
27.Qxa1
Again White has big advantage in material
Time to check |
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Mar-28-14
 | | agb2002: White has a knight a nd a pawn for the bishop pair.
Black threatens 20... Qxb2, 20... N(Q)xd4 and 20... Rh6. The first idea that comes to mind is 20.Qh8+ Ke7 21.Qxg7+ Bf7 (21... Rf7 22.Nxf7 Bxf7 23.Nf5+ exf5 (else 24.Nxd6) 24.Rfe1+ Be5 25.dxe5 looks bad for Black): A) 22.Nxf7 Rxf7 (22... Nxd4 23.Nxd6+) 23.Nf5+ exf5 (23... Ke8 24.Nxd6+) 24.Rfe1+ Be5 25.Rxe5+ Nxe5 (25... Kd6 26.Qg6+ Kc(d)7 27.Qxf7+ wins) 26.Qxe5+ Kd7 (26... Kd(f)8 27.Qh8+ and 28.Qxa8 with two extra pawns and attack; 26... Qe6 27.Rc7+ Kd8 28.Qxe6 Rxc7 29.Qxd5+ followed by h4) 27.Qxd5+ Ke7(8) 28.Qe5+ seems to draw. B) 22.Nh5 Rf5 23.g4 seems to recover some material while keeping the attack. -----
White can try to open the e-file with 20.Nf5:
A) 20... exf5 21.Rfe1
A.1) 21... Rh6 22.Qxf5+ Rf6 (22...Kg8 23.Rxe8+ Rxe8 24.Qf7+ Kh8 25.Qxe8+ Bf8 26.Qxf8#) 23.Nh7+ A.1.a) 23... Kf7 24.Qxd5+ Kg6 25.Nxf6 gxf6 (25... Bxh2+ 26.Kxh2 gxf6 (26... Kxf6 27.Re6+ Kf7 28.Rxc6+) 27.Qg8+ and 28.Rxe8 + -) 26.Qxd6 + - [R+3P vs B+N]. A.1.b) 23... Kg8 24.Nxf6+ gxf6 25.Qxd5+ is similar to A.1.a. A.2) 21... Bf7 22.Qh8+ Bg8 23.Ne6+ Rxe6 (else 24.Qxg7+, etc.) 24.Rxe6 Nxd4 25.Rg6 Ne6 26.Rxe6 Bxh2+ and Black ends up with a bishop and a pawn ahead. B) 20... Rxf5 21.Nxe6+ Ke7 22.Qxf5
B.1) 22... Nxd4 23.Nxd4 Qxd4 24.Rfe1+ looks winning.
B.2) 22... Bd7 23.Rfe1 with many threats (Nc5+, Nf8+, Nxg7+, etc.). -----
Another option is 20.Nh5, threatening 21.Qxg7#, but after 20... Bxh5 21.Qh8+ Ke7 22.Qxa8 the White pieces seem to lack coordination. -----
I don't know. I probably would try 20.Qh8+ Ke7 21.Qxg7+ Bf7 22.Nh5. |
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Mar-28-14
| | agb2002: So, the difficult aspect of this puzzle was how to arrange properly a number of ideas... |
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| Mar-28-14 | | master of defence: <Memethecat> Not really, e.g, 20...exf5 21.Qh8+ Ke7 22.Qxg7+ Rf7! 23.Rfe1+ Kd7 24.Nxf7 Bxf7 25.Qxf7+ Ne7 26.Qe6+ Kd8 and White's attack appears to be gone anyway. The fact is, i still don't see anything better for White, either. <agb2002> <White can try to open the e-file with 20.Nf5: A) 20... exf5 21.Rfe1> You forgot to put the alternative 21...Ne7 in this line, when 22.Qh8+ Ng8 and White has nothing. |
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Mar-28-14
 | | ajk68: <master of defence> 25. Rxc6!
removing the defender |
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| Mar-28-14 | | BOSTER: After white sacr the bishop 16 .Bxh7+ , and couple moves later we had the pos.
click for larger view Black to play 18...
Wa
The Q. is this really correct sacr. or the
bluff.? |
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| Mar-28-14 | | master of defence: <ajk68>, then 25...Kxc6, and how does White continue the attack? |
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| Mar-28-14 | | vajeer: I wonder if 20.Rxc6 followed by Nf5 is better than the text especially because after 20.Nf5 exf5 the advantage is not clear. |
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| Mar-29-14 | | patzer2: Friday's POTD solution 20. Nf5!! is a clever illustration of the decoy tactic. Black is forced to capture the invading Knight to counter the dual threat 21. Qxg7+ Ke8 22. Qxf6  or 2. Nxd6 , winning either the Rook or the Bishop with decisive material advantage. Black can capture the invading Knight with either the Rook or the Pawn. Both captures lose, but in decidedly different fashion. The Rook capture 20...Rxf5 loses to 21. Nxe6 followed by 22. Qxf5 as in the game. The pawn capture 20...exf5 loses to 21. Qh8+!
(not 21. Rfe1?? Bf7! 22. Qh8+ Bg8  )
21... Ke7 22. Qxg7+ Bf7
(22... Rf7 23. Nxf7 Bxf7 24. Rfe1+ Kd7 25. Qxf7+ Ne7 26. Qe6+ Kd8 27. a3 Bxh2+ 28. Kxh2 Qxe6 29. Rxe6 ) 23. Rfe1+ Ne5 24. dxe5 Bxe5 25. Rxe5+
Kd7 26. Rxd5+ Ke8 27. Re1+ (+18.59 @ 21 depth, Fritz 12 on my dual core laptop running @ 2.1 GHZ). P.S.: In the final position of the actual game, Black resigns in lieu of the threat 24...Kd8 25. Qe6! Qa4 26. Qxd6+ . |
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Kibitzing
sac: 16.Bxh7+