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Later Kibitzing> |
Aug-03-11
 | | agb2002: White has an extra pawn.
Black would probably consider moves like ... Nc6 and ... Bc2. The black castle looks defenseless. This invites to play 23.Bxh7+: A) 23... Kxh7 24.Rh5+ Kg8 (24... Kg6 25.Qf5#) 25.Nf6+ gxf6 26.Qg4+ Qg5 27.Rxg5+ fxg5 28.Qxg5+ Kh7 29.Qxa5 Rxd4 30.Qxa7 (if 28... Kh8 then 29.Qe5+ would win the rook now) + - [Q+3P vs R+B]. B) 23... Kh8 24.Bf5 with the threat 25.Qh3+ (25... Qh6 26.Rh5), winning the rook or the queen for a rook. Another option is 23.Qh3:
A) 23... g6 24.Nf6+ Kg7 (24... Kh8 25.Qxh7#) 25.Nxd7 + - [R+P]. B) 23... f5 24.Bxf5 Rxd5 (24... Rdd8(6) 25.Qxh7+ Kf7 26.Re7#) 25.Qxh7+ Kf7 26.Bg6+ Kf6 27.Qh4+ Kxg6 28.Qh5+ Kf6 29.Qf5#. C) 23... h6 24.Ne7+ Kh8 25.Qf5 g6 26.Nxg6+ with a winning attack. D) 23... Qh6 24.Rh5 Qd6 25.Bxh7+ Kh8 26.Bg6+ Kg8 27.Rh8#. E) 23... Rf(a-d)8 24.Qxh7+ Kf8 25.Qh8#.
I have the impression that 23.Qh3 is stronger than 23.Bxh7+. |
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Aug-03-11
 | | rogl: I saw the line played in the game and was happy with that. A little bit disappointed with myself for not seeing 26. xf6 with unstoppable mate. But there really are a lot of winning moves. I plugged the position into Houdini who, at depth 20, gave the 10th ranked move(23.b3) a crushing +4.01! |
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Aug-03-11
| | agb2002: In the 23.Bxh7+ A line I was so focused on winning the queen and the defenseless knight that I missed the obvious 26.Qxf6. This means that my impression was wrong and 23.Bxh7+ is actually stronger than 23.Qh3. |
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| Aug-03-11 | | RMKvdS: Looks like Akobian missed 26. Qxf6, which is a mate in 2! If 23... Kh8 24. Nf6+ gxf6 (forced) 25. Qxf6+
Now there are two moves variations left
25... Kg8 26. Qh8#
and
25... Qh6 27. Qxh6+ Kg8 28. Qh8#
Or am I missing something? |
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| Aug-03-11 | | RMKvdS: Looking at the lines again, if black accepts the bishop sac, after 24. Rh5+ the only move which doesn't involve a mate looks like 24... Qh6. |
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Aug-03-11
 | | whiteshark: I think this was a rather easy to calculate puzzle. I missed the hanging  though. |
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Aug-03-11
 | | Phony Benoni: <smitten: <Phony Benoni: The threat is mate on h8, and it looks like Black can only stop it with 26...Qxf2+, which leaves White with for..> I might be mistaken here, but can't White just play 27.Kxf2 and play Qh8# next move no matter what Black does?> You're quite right. Looks like someone else was up past their bedtime. |
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| Aug-03-11 | | cormier: 3...Bb4? (lost the developement0 and 8.Nf4! |
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| Aug-03-11 | | gofer: Well, I first looked at our old friend Bxh7+. <23 Bxh7+ ...>. Where we hope for
<Kxh7 24 Rh5+ Kg8 (Kg6 25 Qf5#) 25 Nf6+ gxf6 26 Qxf6 mating> But what happens
if black simply accepts the loss of pawn h7 and gets on with his day. So I think
we have to change the move order into a more forcing combination. <23 Nf6+ gxf6>
<24 Bxh7+ ...>
White is going for the jugular. Two minor pieces for just a single solitary pawn,
but the pawns were the only defense the king had so the bits are not going to be
lost...
24 ... Kh8 25 Qxf6 Kxh7 26 Rh5+ Qh6 27 Rxh6+ Kg8 28 Rh8# 24 ... Kg7 25 Qg4 Qg5 (Kxh7 transposes to the line below and Kh8 Rh5 is winning) 26 Rxg5 fxg5 27 Bf5 winning) <24 ... Kxh7>
<25 Rh5+ Qh6>
(Kg7 26 Qg4+ Qg5 27 Rxg5+ fxg5 28 Qxg5+ Kh8 29 Qxa5 winning!)
<26 Qf5+ Kg7>
<27 Rxh6 Kxh6>
<28 Qxf6+ Kh7>
<29 Qf4+ Kg8>
<30 Qxa5 ...> winning Time to check... |
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Aug-03-11
 | | Patriot: There are many forcing candidates to consider here that may be winning: Bxh7+, Nf6+, Qh3, Qg4, Rh5. Qg4 looks unsafe or at least worse by comparison (e.g. 23.Qg4 Qxd3 24.Nf6+ Kh8 25.Nxd7?? Qxb1+ and mate in a few moves). For a player who often gets into time trouble by playing too slowly, a position like this can easily cost a lot of time. This is easily the case if you are trying to find the best move, as opposed to the best move within a reasonable time. But perhaps all this position requires is to find a winning move, which Akobian did. 26.Qxf6 is far stronger than 26.Qg4+ so perhaps when he saw that 26.Qg4+ was winning, he stopped looking. We often hear "When you see a good move, look for a better one!" But we never hear about "When you see a winning move, play it!" or when this advice should be followed. I went with 23.Nf6+ gxf6 24.Qxf6 thinking 24...Qxd3 25.Rg5+ Qg6 26.h4 looks winning but felt I missed something, somewhere (26...h6 or 26...h5 looked inconvenient). It turned out that I missed the hanging knight on a5 (from the game line) because without this the whole sequence becomes questionable (unless you see 26.Qxf6!)--white gave up a lot of material for the queen (too much!). |
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| Aug-03-11 | | mqhelisi: The one I saw was...
23.Bxh7 Kxh7
24.Nf6+(which I think is better) ...gxf6
25.Rh5 Qh6
26.Rxh6 Kxh6
27.Qxf6 Kh7
(Then the route Re1, Re3, Rh3 how can it be stopped on time?)
( |
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| Aug-03-11 | | mqhelisi: .....or at least on our line instead of 26.Qg4+
26.Qxf6! mate in 2 |
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| Aug-03-11 | | Bumcrot: 26. Qxf6 is answered by Qxd4. |
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| Aug-03-11 | | mworld: <Bumcrot: 26. Qxf6 is answered by Qxd4.> then 27. Rh8# |
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| Aug-03-11 | | CHESSTTCAMPS: Forget the pawn deficit, black's chaotic development is simply no match for the centralized and cohesive white force. With the minor pieces so far afield, there are almost no useful defenders of the black king. Therefore 23.Bxh7+ (Qf5 g6 24.Nf6+ Kg7 offers defensive chances) and white's attack almost plays itself: A) 23... Kxh7 24.Rh5+ Kg8 (Kg6 25.Qf5#) 25.Nf6+! gf 26.Qxf6! (Qg3+? Qg5 27.Rxg5+ fg 28.Qxg5+ Kh7 29.Qxa5 Rxd4 leaves black alive) and R/Qh8# on move 25 or 26 is not preventable. A.1) 24... Qh6 25.Rxh6+ Kxh6 (gh 26.Nf6+ K moves 27.Nxd7 Bxd7 28.Qd5) 26.Qh3+ Kg6 27.Nf4+ Kf6 (Kg5 28.Qh5+ wins another piece) 28.Qh4+ g5 29.Qh6+ Ke7 30.Qxg5+ picks up the loose Na5. B) 23... Kh8 24.Rh5 Bc6 (otherwise 25.Bc2+ picks up a piece) 25.Qh3 g6 (Rxd5 26.Bf5+ ) 26.Bxg6+ Kg7 27.Rh7+ Kxg6 28.Qh5# Time for review... |
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| Aug-03-11 | | CHESSTTCAMPS: Line A should have read "on move 27 or 28 is not preventable". The way Akobian grabbed the initiative so early is a cautionary example for a NimzoIndian player. Time to play "find black's losing error".... |
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Aug-03-11
 | | Jimfromprovidence: I chose 23 Ne7+ because it seemed the least complicated way to go.
click for larger view Black has just two responses. If black takes the knight, white recaptures and is up an exchange plus a pawn. However, if black tries 23...Kh8, white wins right away with 24 Qf5, theatening mate in one and double attacking the knight. 
click for larger viewBlack must respond 24...Qh6, thus losing the knight. |
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| Aug-03-11 | | rapidcitychess: I failed by trying to play Nf6+ before the rook check.' I think white still wins though, with (23.Bxh7+ Kxh7 24.Nf6+ gxf6) 25.Rh5+ and
A.25...Qh6 26.Rxh6+ Kxh6 27.Qf4+ Kg7 (Random pick, the idea is always the same. Just get the queen on g4.) 28.Qg4+ Kh7 29.b3 Bb5 (If Bc6, then 30.b4 Nc4 31.d5 and black is over loaded.) 30.a4 Bc6 31.b4 Nc4 32.d5 and white wins the knight.
B.25...Kg6 26.Rg4+ Qg5 27.Rxg5 fxg5 28.d5 Bb5 (28...b5 b3) 29.a4 and white wins the bishop. I think my analysis is correct. Please tell me if I missed something. |
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| Aug-03-11 | | Creg: I'm looking at 23.Nxf6+, I like the way it pry's open the black king. 23.Nxf6+ gxf6 24.Bxh7+ Kxh7 25.Rh5+ with Qg4+ to follow. Black will have to give up the queen, but does white have enough compensation? Oh, wait, I see the knight on a5 is unguarded.
25...Kg8 26.Qg4+ Qg5 27.Rxg5+ fxg5 28.Qxg5+ Kh7 29.Qxa5 It's Q+R vs R+R+B, this should be good enough for a win, but there should be something more here. I must be missing something, or going the wrong route. -------
Different move order, but same conclusion. I will check kibitz to see if 23.Bxh7+ is better then 23.Nxf6+ |
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| Aug-03-11 | | LIFE Master AJ: 23.BxP/h7+.
Looks like a nice attack ... if Black takes, but I got "lost in the woods" trying to figure out the win in the declined line. (I also had a problem with a ghost piece on d3 - Black kept taking it in my head, but when I played through it on the computer, it wasn't there.) |
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| Aug-03-11 | | VincentL: "Medium/Easy".
The first move I see here is 23. Nf6+
If 23.....exf6 24. Qf4+. After 24.....Kh8 25. Qh3 and black has no good defence against Qxh7 mate. Black can play 24.....Qg5 and after 25. Rxg5+ fxg5 26.Qg5+ white emerges with a material
advantage of Q + 2P for R + N.
If black declines the knight and plays 23.....Kh8, white simply continues Nxd7 winning the
exchange.
I think this is it. Letīs check. |
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| Aug-03-11 | | VincentL: Too hasty.
In my first line, 25.....Qxd3 wins for black.
I saw this when I moved the pieces. |
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Aug-03-11
 | | dzechiel: <Dr. J: <dzechiel> Unfortunately, I think your 26 Qh3 is refuted by 26...Bc2, covering h7, since h6 is covered by the Queen on d2.> I stand corrected. Good catch, Dr J. |
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| Aug-03-11 | | LIFE Master AJ: Varuzhan Akobian (2438) -
Imed Abdelnabbi (2408);
[E42]
10th Abu Dhabi Open (R#7) / 02,09,2000.
[A.J. Goldsby I & Fritz 12]
1.d4 Nf6; 2.c4 e6; 3.Nc3 Bb4; 4.e3 c5; 5.Nge2 cxd4; 6.exd4 d5; 7.a3 Be7; 8.Nf4 0-0; 9.cxd5 Nxd5; 10.Ncxd5 exd5; 11.Bd3 Nc6; 12.0-0 Bg5; 13.Be3 Qd6; 14.Nh5 Qh6; 15.Qf3 Be6; 16.Rad1 Na5; 17.Nf4 Rad8; 18.Rfe1 Bd7; 19.Nxd5 Ba4; 20.Rb1 Rd7; 21.Bxg5 Qxg5; 22.Re5 Qd2; Now we have reached the position for today's POTD.
click for larger view 23.Bxh7+! Kxh7!?;
This loses quickly ... but the declined line wasn't much better. [RR 23...Kh8; 24.Rh5 Rxd5; 25.Qxd5 Bd1; 26.Qxa5 Qxa5; 27.Rxa5 Kxh7; 28.Rxd1,  ] 24.Rh5+ Kg8, ('?')
[ The only move was: 24...Qh6 ; but I am sure that Black would have resigned before playing this. ] 25.Nf6+! gxf6; 26.Qg4+?!,
Not the most efficient.
[ Best was: >/= 26.Qxf6! Qxf2+; 27.Kxf2, ( ) and 28.Rh8#. ] 26...Qg5; 27.Rxg5+ fxg5; 28.Qxg5+ Kh7; 29.Qxa5, Black Resigns. 1-0 |
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| Aug-03-11 | | LIFE Master AJ: I did the above to verify that White did indeed miss a simple mate ... |
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