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Krishnan Sasikiran vs Emanuel Berg
Najdorf Memorial (2008), Warsaw POL, rd 4, Aug-05
Benoni Defense: Taimanov Variation (A67)  ·  1-0



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Kibitzer's Corner
Aug-14-08  Elxiddicus: What happens after 22. ...Kxf7 ?
Aug-15-08  OneArmedScissor: Maybe something like:

<22. ...Kxf7 23. Qh5+ Kg8 24. d6+ Kh8 25. Rxe8+ Qxe8 26. Qxf5 Bd4+ 27. Kg2 Bxb2 28. Rf1 Bg7 29. Qxc5>

And black is in trouble.

<22. ...Qf6 23. Rxe8+ Rxe8 24. d6 Kf8 25. Ne5! Rxe5 26. d7 Qd8 27. Qd6+ Re7 28. Bh6 Qxd7 29. Qf6+ Ke8 30. Bxg7 Kd8 31. Re1>

Aug-19-08  PAWNTOEFOUR: after 22... Kxf7...crafty comes up with this.......pv 23.Qh5+ Kg8 24.Rxe8+ Qxe8 25.d6+ Kh8 26.Qxf5 Rd8 27.Qxc5 Nc6 28.Kf1 Qf8 29.Bxa6 Bd4 30.Qd5 bxa6 31.Qxc6 Bxb2 +275 Crafty approx...1.2million nodes
Aug-22-08  piteira8: but what if 22, ... Kxf7, 23. Qh5+, Bg6? It seems that white can't push any further.
Aug-22-08  Takya Kotov: <piteira8: but what if 22, ... Kxf7, 23. Qh5+, Bg6? It seems that white can't push any further.>

I'm not sure white's attack is finished. e.g. 24.d6+ Kf8 25.Qxc5 Rxe4 26.d7+ Re7 27.Bg5

I'll have white any day

Sep-21-14  yadasampati: The only insane thing here is me getting out of bed this early (06:00 a.m. in Amsterdam)
Sep-21-14  plumbst: Insane. Material is equal. White's Rook is under attack.

White cannot afford to retreat the Rook and give up the initiative; good thing there is a tactic.

22.Nxf7! Kxf7
23.Qh5+ Bg6. <23...Kf6 24.Bf6#; 23...Kg8 24.Qxf5 > 24.d6+ Kf8
25.d7! (clearing d6) Bxh5
26.Bd6+ Re7
27.Rf1+ Bf6
28.Rxe7 Qxe7
29.Rxf6+ Kg7

If 22...Qf6
23.Rxe8+ Rxe8
24.d6 Qxb2
25.Ne5+ and d7 wins

Sep-21-14  lostgalaxy: 22.Nf7 is obvious.

But whats next for White?

22...Kf7 is not too difficult to figure out.

But what if Black counter sac with 22... Re4 23.Nd8 Bd4+ 24.Kh1 Rd8

And this is beyond me really.

Sep-21-14  lostgalaxy: Maybe 23...Rc4 taking the bishop would be a different fate. I couldnt decide whether to take the knight or bishop.
Premium Chessgames Member
  hoodrobin: Those guys don't need a computer I guess.
Sep-21-14  stacase: 22 Nf7 is a let's see what happens role of the dice move for me. But I would have probably made it over the board.
Premium Chessgames Member
  Once: Nxf7 in a heartbeat.

The rest would probably take an eternity. If at all.

I enjoyed the way that the Rc1 calmly sat en prise for ages.

Sep-21-14  morfishine: I figured <22.Nxf7> 22...Kxf7 23.d6+ Kf8 when White can prosecute the attack with the simple 24.Rxe8+

I never considered Black would let the Queen go with 22...Rxe4


Sep-21-14  gofer: Well, I was trying to make Nxf7 work and I stumbled upon one rather nice combination...

22 Nxf7 Kxf7
23 Qh5+ Bg6
24 d6+ Kf8
25 Rxe8+ Qxe8 (Kxe8 Re1+ is worse for black)
26 Qxc5!

White exploits the knight sacrifice to win two pawns and then gain back the knight. So knowing that black must avoid this I can go into this line a little more confidently...

<22 Nxf7 ...>

22 ... Bd4+
23 Rxd4 Kxf7
24 Qh5+ Bg6
25 d6+ Kg7 (Kf8 Bh6# or Kf6? Bg5+ ) or
26 Bh6+ Kh8
27 Qxc5

22 ... Rxe4
23 Nxd8 Rxc5
24 Ne6 Bxb2
25 Qb3 Bxe6
26 dxe6 Bxa1
27 Qxc4 Bd4+
28 Kg2 Kg7 (Kf8 29 Bg5 )
29 e7 Kf6
30 Bd6

22 ... Qf6
23 Rxe8+ Rxe8
24 d6 Qd4+
25 Qxd4 Bxd4+
26 Kg2 Be4+
27 Kh3 Nd5
28 d7 Nxf4+
29 gxf4 Bf5+
30 Kg2 Bxd7
31 Nd6 Be6
32 Nxe8 ??


Hmmm, half a point? I got the first two moves and realised the Kxf7 was losing... ...but nowhere near really...

Sep-21-14  rogl: SF says that 30.Kg2?? is a huge error. White's score goes from +(a lot) to 0.00 since black can force a draw with 30...Bf6 31.Qh6 Bg7 32.Qg5 Bf6 etc.
Sep-21-14  Strelets: <rogl> Sasikiran might have been pretty far down on time. The exacting nature of chess: one bad move ruins an inspired attack and allows your opponent to escape with a draw by a repetition of moves.
Premium Chessgames Member
  agb2002: The material is identical.

Black threatens 22... Bxe4.

The first idea that comes to mind is 22.Nxf7, trying to expose the black king.

A nice variation is 22... Kxf7 23.d6+ Kf8 24.Qh5 Bg6 25.Bh6 Bxh5 26.Rf1+ Bf7 27.Rxf7+ Kg8 28.Rf8+ Kxf8 29.Rf4+ Qf6 30.Rxf6# but Black can play 24... Qd7 or 25... Rxe4.

I don't have time for more today.

Sep-21-14  vajeer: <plumbst:> 25.d7 is a key move. White can win even after 25...Qf6. white can push further with 26.Rf1 Now after 26...Rxe4 27. Bd6+ Re7
28. Rxf6+ Bxf6
29. Qh6+ Bg7
30. Qf4+ wins

I think what makes d7 special is that it doesn't just clear d6 but also blocks Black king's escape through e8.

Sep-21-14  Mr. President: I'd rather you didn't.
Sep-21-14  Andrew Chapman: Sorry if I am missing something very obvious, but why not 30..Bxc1?
Premium Chessgames Member
  OhioChessFan: <AC> 30...Bxc1 31. Bxc6 and now Qe5+ winning the Rook is threatened. If Black tries to defend the e5 square with Bb2, then Qc5 and the Rook is again under attack. Then White will follow up with Bxb7. Maybe something like 30...Bxc1 31. Bxc6 Bb2 32. Qxc5 Rd2+ 33. Kf3 Rf7 34. Bxb7 which should be an easy win.

click for larger view

If Black moves the Rook after Qxc5, he faces Qf8++ so the Rook must check or guard the f8 square. 30...Bxc1 31. Bxc6 Rd2+ 32. Ke2 bxc6 34. Qxc5 and again White should win this.

click for larger view

Getting rid of the c6 Knight is the key for White and that is what Bxc1 allows.

Sep-21-14  lostgalaxy: 23...Rxc4 24.Ne6 (the bishops attack on White King has to be defended) Bd4+ 25.Nxd4 Rxd4 not so clear and rosy for White.
Premium Chessgames Member
  Penguincw: I thought I was getting better by being able to solve puzzles as deep as midweek, but now I can't even guess the first move (which is what I usually do). :(
Sep-21-14  Cheapo by the Dozen: I went for a different move order, putting d6 before Nxf7. My analysis was:

The answer surely starts

22 d6 Bxe4
23 Nxf7

It turns out to be extremely hard for Black to save his queen straightforwardly. Zwischenzugs seem not to work, since White is threatening to take the queen with check.

And so the only try I see for Black is 22 ... Qf6, which threatens ... Qd4+ and quite a bit of simplification.

Because of that threat, an immediate 23 d7 doesn't seem to work, and so White needs to try 23 Be5 instead. Black's main responses are ... Qg6 (since White has just blocked his chance for Ne5+) or .. Rxe5; the latter of course invites Nxe5+. And so there are two main lines:

22 d6 Bxe4
23 Nxf7 Qf6
24 Be5 Rxe5
25 Nxe5+ Kh8
26 d7

The knight at e5 temporarily blocks the possible mayhem of ... Qd4+, and White seems likely to wind up the exchange ahead.


22 d6 Bxe4
23 Nxf7 Qf6
24 Be5 Qg6
25 d7
I think White gets a whole rook back.

Sep-22-14  patzer2: The Sunday Sep 21, 2014 puzzle's difficulty lies in the sacrifice accepted line after 22. Nxf7!! Kxf7 23. Qh5+ Bg6 24. d6+ Kf8 (diagram below)

click for larger view

25. d7!! Bxh5 (25...Rxe4 26. Bd6+ Qe7 27. Rf1+ Rf4 28. Rxf4+ Bf6 29. Qh6#) 26. Bd6+ Re7 27. Rf1+ Bf6

click for larger view

28. Rxe7! Qxe7 29. Rxf6+ Kg7 30. Bxe7 Nc6 31. Rxc6 bxc63 2. d8=Q Rxd8 33. Bxd8 (+9.71 @ 20 depth on 2.1 GHZ dual core Intel processor running Fritz 12)

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