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Viswanathan Anand vs Felix Izeta Txabarri
Madrid (1993), Madrid ESP, rd 7, Jun-??
Czech Defense: General (B07)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Sep-18-13  M.Hassan: "Medium/Easy"
White to play 24.?
White has a Bishop for a Rook.

24.Qxh7+ Rxh7
25.f7+ Be5
26.e8=Q#

If Black defends with the Rook:

25.f7+ Rg8 Rook is pinned now
26.fxe8=Q+ Bf8
27.Qxf8#

Sep-18-13  M.Hassan: <PB: A lesson in temptation avoidance>

As my solution is!!!
Funny that at first I went with 24.Bxh7 but disregarded it as I thought Qxf7 is more forcing move.

Sep-18-13  newzild: My main line was the following:

24. Bxh7 Rxh7
25. f7+ Ng7
26. Bxg7+ Kxg7
27. Nf5+ Kf8
28. Rg8+ Kxf7
29. Qxh7+ Ke6
30. Rg6+ Ke5
31. Qh5 Bf8
32. Qe2+ Kf4
33. Qg4+ Ke5
34. Ne2

With mate next.

Sep-18-13  diagonalley: ouch!... i got this one horribly wrong ... must remember to have breakfast before trying to deploy brain cell...
Sep-18-13  bubuli55: Although it's a Wednesday puzzle, several pieces on the board. Complex position. < 24. Bxh7 > stands out. And then it calls for a WC continuation. Let it fly.

24. Bxh7 Rxh7 25. f7+ Ng7 26. Bxg7+ Kxg7 27. Nf5+ Kxf7 28. Qxh7 should win

Play the game.

Sep-18-13  Kikoman: After analysing this POTD for atleast 15 minutes, 24. <Qxh7+> was a blunder, I also see that line but it's bad for White e.g. 24... Rxh7 25. f7+ (discovery) Ng7! (not 25... Be5?? or Rg7?? because of 26. fxe8=Q/R+#) and now, that White f-pawn can't promote to a Queen. So I switch to 24. Bxh7!! and now how should Black response? :Dv
Sep-18-13  scholes: In this position there are lot of winning moves. My candidate move was Nh5 which is also winning. But Bxh7+ is the best move

FEN:


click for larger view

Stockfish_4_32bit:

18/42 +11.21 Ng3-h5 Bd6xh2 Rg1-g2 Qc7-d6 Qh4-g5 Qd6-f8 Rg2xh2 Qf8-g8 Qg5-h6 Nb8-d7 Nh5-f4 Nd7-f8 Rh2-g2 Qg8xg2 Nf4xg2 Ne8-d6 Qh6-h5 Nf8-d7 Bd3-g6 Ra8-f8 Ng2-f4 c6-c5 Bg6xf7 Rf8xf7 Qh5xd5 c5xd4 Qd5xd6 Rf7xf6 Qd6xd4

19/42 +16.54 Ng3-f5 Bd6-f4+ Kc1-b1 Nb8-d7 Nf5-e7 Ne8xf6 Ne7-g6+ Kh8-g8 Ng6xf4+ Kg8-h8 Nf4-g6+ Kh8-g7 Ng6-e5+ Kg7-f8 Qh4-h6+ Kf8-e7 Ne5xf7 Ra8-g8 Nf7-g5 Rg8xg5 Qh6xg5 Qc7-d6 Rg1-f1 Qd6-e6 Bd3-f5 Qe6-e2 Rf1-g1 Qe2-h5 Rg1-e1+ Ke7-f8 Qg5xh5 Nf6xh5 Bf5xd7

19/42 +22.64 Ng3-e2 Bd6-e5 Bd3xh7 Ne8xf6 Bh7-f5+ Rf7-h7 Bd4xe5 Rh7xh4 Be5xf6+ Qc7-g7 Rg1xg7 Nb8-d7 Rg7xd7+ Kh8-g8 Bf6xh4 Ra8-f8 Ne2-d4 c6-c5 Bf5-e6+ Kg8-h8 Bh4-e7 Rf8-f1 Be7xc5 a7-a6 Be6xd5 Rf1-f6 h2-h4 Rf6-f4 h4-h5 Rf4-f1 Kc1-d2

19/42 +28.04 Bd3xh7 Bd6-f4+ Kc1-b1 Bf4xg3 h2xg3 Ne8xf6 Bh7-g6+ Kh8-g7 Qh4-h7+ Kg7-f8 Bd4-c5+ Kf8-e8 Qh7-h8+ Nf6-g8 Rg1-f1 Ke8-d7 Qh8xg8 Qc7-f4 g3xf4 Kd7-c7 Qg8xf7+ Nb8-d7 Bg6-f5 Ra8-d8 Bc5xa7 b5-b4 a3xb4 Kc7-d6 Nd1-e3 Kd6-c7 Qf7-e7

Sep-18-13  RandomVisitor: Black errs with 12...f5 - better was 12...c5
Sep-18-13
Premium Chessgames Member
  agb2002: White has a bishop for a rook.

Black threatens ... Be5.

The rook on f7 prevents 24.f7+. This suggests 24.Bxh7 (the flashy 24.Qxh7+ Rxh7 25.f7+ Ng7 doesn't work), exposing the black king:

A) 24... Rxh7 25.f7+ Ng7 (25... Be5 26.fxe8=Q+ wins; 25... Nf6 26.Bxf6#) 26.Bxg7+ Kxg7 27.Nf5+

A.1) 27... Kxf7 28.Qxh7+ Ke6 (28... Kf8 29.Q(R)g8#; 28... Ke8 29.Rg8+ Bf8 30.Qxc7, etc.; 28... Kf6 29.Qg6+ Ke5 30.Re1+ Kf4 31.Nxd6, etc.) 29.Nd4+

A.1.a) 29... Ke5 30.Qf5+ Kxd4 31.Qf2+ and mate next.

A.1.b) 29... Kf6 30.Qh8+ Ke(f)7 31.Rg7+ Kf6 32.Qh6+ Ke5 33.Qe3+ Kf6 34.Qg5#.

A.2) 27... Kf8 28.Rg8+ Kxf7 29.Qxh7+ Ke(f)6 30.Qg6+ Ke5 31.Re8+ Kf4 32.Nxd6 wins.

A.3) 27... Kh8 28.Qf6+ Rg7 29.Qxg7#.

B) 24... Nxf6 25.Bd3+ (or 25.Bxf6+ Rxf6 26.Qxf6+ Qg7 (26... Kxh7 27.Nf5 with multiple mate threats) 27.Qxd6 + - [N]) 25... Kg8 (25... Rh7 26.Bxf6+, etc.) 26.Nf5+ wins.

C) 24... Bf4+ 25.Kb1 doesn't seem to change the result.

D) 24... Bxg3 25.Rxg3

D.1) 25... Rxh7 26.f7+ Ng7 27.Bxg7#.

D.2) 25... Nxf6 26.Bxf6+ Rxf6 27.Qxf6+ Kxh7 28.Rh3+ Kg8 29.Rh8#.

Sep-18-13
Premium Chessgames Member
  agb2002: I missed D.3) 25... Qxg3 26.hxg3 Rxh7 27.f7+ Ng7 28.Qd8#.
Sep-18-13  Nick46: <scholes: In this position there are lot of winning moves.> Glad to hear it.
Sep-18-13  zb2cr: I carelessly went for 24. Qxh7+?, Rxh7; 25. f6+, but White can't win after that.
Sep-18-13  mistreaver: Wednsday. White to play. Medium/Easy. 24.?
24 Qxh7+ Rxh7
25 f7+ Be5
26 fxe8Q+ 1-0
as natural as baby's smile.
---
Whoops, don't get cocky, after f7+ Sg7 it is not white who wins.
Sep-18-13
Premium Chessgames Member
  morfishine: Quite involved for a Wednesday. 3 candidates: 24.Qxh7+, 24.Bxh7 & 24.Nf5

Candidate (1) <24.Qxh7+> fails to 24...Rxh7 25.f7+ Ng7

Candidate (2) <24.Bxh7> Looks good after 24...Rxh7 25.f7+ Ng7 26.Nh5 Qxf7 27.Qd8+ Qf8 28.Nxg7 Qxd8 29.Ne6+ Rg7 30.Rxg7

But what kills is Candidate (3) <24.Nf5>

(3a) 24...Bf4+ 25.Kb1 h6 26.Rg7 Nxg7 27.fxg7+ Kg8 28.Qxh6 Bxh6 29.Nxh6#

(3a1) 25...Nd7 26.Qxh7+ Rxh7 27.f7+ Ng7 28.Nxg7 Rxg7 29.Rxg7 Nf8 30.Rh7#

(3b) 24...Nd7 25.Qxh7+ Kxh7 26.Nxd6+ Kh8 27.Nxf7#

(3b1) 25.Nxd6 Nf8 26.Nxf7+ Qxf7 27.Rg7 Nxg7 28.fxg7+ Kg8 29.gxf8=Q+ Kxf8 30.Bxh7

(3c) 24...Bf8 25.Ng7 Rxg7 26.fxg7+ Kg8 27.Bxh7+ Kf7 28.g8=Q#

(3d) 24...Be5 25.Ne7 Rxe7 26.f7 Rxf7 27.Qg5 Nf6 28.Bxe5 Qd8 29.Bxf6+

or the amusing (3d1) 25...Nxf6?? 26.Qxf6+ and mate next move


click for larger view

*****
PM: I never considered 24.Nh5 as a possible candidate (though 26.Nh5 is in the 24.Bxh7 line); Sadly, in the analysis of <24.Bxh7> I overlooked the simple 26.Bxg7+ :(

*****

Sep-18-13  cyclon: An enormous Puzzle and in my view NOT EXACTLY a "Medium/Easy". Anyway, I'd go for ( maybe correct, maybe not ) : 24. Bxh7 ( threat is 25. Bg8+ Rh7 26. f7+ winning. Temptation 24. Qxh7+ Rxh7 25. f7+ Ng7 26. Nh5/Nf5 Bf4+ 27. Kb1 Qxf7 fails for White. ) and NOW;

1. ( 24. Bxh7 ) -24. -Be5 25. Nf5 ( threat 26. Rg8X ) -Rxh7 ( 25. -Nxf6 26. Bg6+ and NOW [sub-variations]: a) -26. -Rh7 27. Bxh7 Qxh7 [27. -Nxh7 28. Bxe5+ Qxe5 29. Qd8+, or 27. -Bxd4 28. Bg8+ Nh7+ 29. Qxd4+ ] 28. Qxf6+ wins

b) -26. -Nh7 27. Bxf7 wins

c) -26. -Kg8 27. Bxf7++ Kxf7 [27. -Kf8 28. Bc5+] 28. Rg7+ Ke6 29. Rxc7 curfew.

and now back to main-line 1. after 24. Bxh7 Be5 25. Nf5 Rxh7;

26. f7 ( a key-move though not even a check here - White threats mate with 3 separate (!) moves by 27. Rg8X / fxe8QX/f8QX ) -26. -Qxf7 27. Bxe5+ Ng7 28. Bxg7+ followed by 29. Qd8+ winning

2. ( 24. Bxh7 ) -24. -Nxf6/Rxf6 25. Bxf6+ N/Rxf6 26. Qxf6+ Kxh7 27. Nf5 wins soon

3. ( 24. Bxh7 ) -24. -Bf8 ( 24. -Bf4+ 25. Kb1 doesn't change things better for Black ) 25. Bg6+ Kg8 ( 25. -Rh7 26. f7+ and 27. Qxh7X ) 26. Bxf7+ Kxf7 ( or 26. -Qxf7 27. Nf5+ B/Ng7 28. Nh6+ wins the Queen as a 'by-product' ) 27. Qh5+ and NOW either -27. -Kg8 28. f7+ Qxf7 29. Qh8X, OR -27. -Ke6 28. Re1+ Kd6 ( 28. Kd7 29. Qxe8+ Kd6 30. Qe6X ) 29. Qe5+ Kd7 30. Qe6+ Kd8 31. Qxe8X.

4. ( 24. Bxh7 ) -24. -Bxg3 25. Rxg3 ( threat = 26. Rg8X ) -25. -Nxf6 ( 25. -Ng7 26. Bg6+ Kg8 [ 26. -Nh5 27. Qxh5+ ] 27. Qh7+ Kf8 28. Qh8X. Neither Black can play 25. -Qxg3 26. hxg3 [threat is 27. Bg6+] -26. -Rxh7 because 27. f7+ wins immediately ) 26. Bxf6+ Rxf6 27. Qxf6+ Kxh7 28. Qh4X.

5. ( 24. Bxh7 ) moves like -24. -Rf8 gets 25. f7+ Be5 ( 25. -Ng7 26. Bg6+ mates ) 26. Bg8+ Kg7 27.Nf5X mates by DOUBLE-check, or -24. -Rg7 (despair) 25. fxg7+ Nxg7 26. Bg6+ soon mates.

Because of these illustrations I chose 24. Bxh7 and again; this puzzle wasn't exactly "easy".

Sep-18-13  HowDoesTheHorsieMove: I chose Nf5, which is winning, but I missed the strongest response.

It's getting too late in the week for me.

Sep-18-13
Premium Chessgames Member
  Cannon Fodder: Glad I'm not the only one who missed it.
Sep-18-13  beenthere240: It's amusing that the computer eval for 24. Ne2 is actually higher than for 24. Nf5. (I guess the Knight gets in the way after f5 or h5.) Of course any human who played 24. Ne2 in a tournament would be grabbed by the ankles and shaken upside down until his hidden computer fell out.
Sep-18-13
Premium Chessgames Member
  patzer2: Didn't spend much time on this Wednesday puzzle, but my quick solution 24. Bg6 seems to win as surely as GM Anand's brilliant 24. Bxh7!

Plugging it in to Fritz 12 yields 24. Bg6 c5 25. Bxf7 cxd4 (25...Qxf7 26. Nf5! ) 26.. Bxe8 d3 27. Rg2 Qc4 28. Qxc4 bxc4 29. Nh5! with mate-in-13 to follow.

Sep-18-13
Premium Chessgames Member
  kevin86: I missed it...went for the queen sac-beaten by Ng7.
Sep-18-13
Premium Chessgames Member
  pittpanther: I thought this was a bit hard for a Wednesday puzzle, but a nice position to analyze.
Sep-18-13
Premium Chessgames Member
  benveniste: After rejecting the Q-sac, I chose 24. ♗g6, which I think is yet another slower win.
Sep-18-13  JimNorCal: I also went with Bg6. Attacks the rook, the h-pawn is pinned and can't capture, but if the rook moves, f7+ wins. Didn't have time to plug into an engine to find out why it didn't work, much appreciate <patzer2> doing that legwork!
Sep-18-13
Premium Chessgames Member
  Penguincw: I was thinking of something along the lines of 24.Qxh7+ Rxh7 25.f7+ with promotion to follow.
Sep-18-13
Premium Chessgames Member
  morfishine: If one has found a winning line other than one starting with 24.Bxh7, then one has found a winning line. I'm perfectly content with <24.Nf5> (unless its refuted)

*****

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