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Anatoly Karpov vs Andrei Istratescu
Karpov Istratescu Match (2005), Bucharest ROU, rd 4, Mar-24
Queen's Indian Defense: Fianchetto. Nimzowitsch Variation Quiet Line (E15)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 1 OF 3 ·  Later Kibitzing>
Apr-25-05  ThomYorke: It was good!
Apr-25-05  samikd: This is called Tachnique
Apr-25-05  Gypsy: This is actually quite a tough puzzle, when computed all the way to move 48 where the combination/forcing-play logically ends. (Luckily, the intro two moves are obviously the best.)
Apr-25-05  aw1988: I stopped calculating right after Rh8+. Thank god it's Monday.
Apr-25-05  fian: Umm...its ticked over to Monday. It's still not Sunday.
Apr-25-05  erikcu: I found the game winning follow up more instructive than the puzzle solving move.
Apr-25-05  ccme: I don't see the winning line. My mind is still stuck on 64 ... Rg7+ 65 Kf8 Rg5 66 Qf7+ Kh8 67 Qf6+ Kh7
Apr-25-05
Premium Chessgames Member
  cu8sfan: After a long drought finally a puzzle I was able to solve again. I think it's promotion week. Have a good Monday, y'all!
Apr-25-05  crafty: 64. ... ♖g5 65. ♔f8 h5 66. ♕f7+ ♔h6 67. ♕f6+   (eval 10.19; depth 17 ply; 1000M nodes)
Apr-25-05  vajrabhrt: I saw Rh8+ immediately, but it didn't look like a forced win to me. I was trying to see if White had any forks by which he could pick up the rook or the bishop quickly. The puzzle is either too easy or quite deep depending on how you look at it.
Apr-25-05  Madman99X: Rh8+ allows white to queen with check, however a queen against a rook endgame is NOT easy. That's a win for Karpov, but it's probably a draw if I'm in that situation.
Apr-25-05  Saph: Nice Sunday puzzle, where the move is obvious and the follow-up is the real challenge.

A rook check allows White to queen the b-pawn (with 40.Rh8+ Kxh8 41.b8=Q+). But having a queen doesn't mean you're gonna win. White has work for his money. The ensuing checks (41.b8=Q+ Kh7 42.Qc7+ Kg6) force the Black king to run for cover behind his pawns. Now, White uses the queen's flexibility to start harrassing Black's rook and bishop.

43.Qc4 threatens to take the Black's a6 rook or e4 bishop, forcing 43...Bb7. Similarly, 44.Qb3 Be4 is forced (because of the possibility of 45.Qd3+ threatening to fork the a6 rook).

I personally like 45.Ke3 Bf5 46.g4 because if Black's light-squared bishop leaves the a1-f5 diagonal, Qd3+ is once again possible.

A good combination of position and tactics, it's probably the only Sunday puzzle I'll ever understand :)

Apr-25-05  Saph: Lol, so did I just comment on a Monday or a Sunday puzzle? I think I'll go back to bed until I know what day it is.
Apr-25-05  Gypsy: < ccme: I don't see the winning line. My mind is still stuck on 64 ... Rg7+ 65 Kf8 Rg5 66 Qf7+ Kh8 67 Qf6+ Kh7 > Rightfully so, 68.Kg7 Rg8! and we seem to have a tough little fortress?
Apr-25-05  samikd: I agree, the win is not forced for White even after he queens. In fact, with his Rook and Bishop and extra pawns, Black was at least equal. So I dont think this should have been a puzzle of 'to play and win' category. However, I find Karpov's superb technique in handling the Q vs R endgame, especially the last few moves, really instructive. I read in Capablanca's 'Chess Fundamentals' how to win this tough ending, and the former World Champion illustrates that method in fantastic fashion
Apr-25-05  Gypsy: <crafty> Please, look at <ccme>'s line < 64 ... Rg7+ 65 Kf8 Rg5 ...>. How do you finnish now?
Apr-25-05  ryanpd: Nalimov tablebases say that black had a forced draw ever since move 55. After 55, Qxh3, all the following moves are drawing: Kg7, Rg6, Kg8, and Kh7. Black's last chance to make a draw was on move 59: Instead of Kg8??, Rg7/Rg1/Rg8 are drawing (all other moves are losing).

For example: 59. Qe4 Rg7 60. Qe8+ Rg8 61. Qh5 Kh7 62. Qf7+ Kh8. There is no way to make progress.

Apr-25-05  samikd: <gypsy> and <ccme>, after 64..Rg7 65 Kf8 Rg5 White can play 65.Qe7+ Kh8 66.Qf6+ Kh7 67.Kf7 after which the Rook is forced to move, and White wins (I think).
Apr-25-05  The beginner: The puzzle should have been what is white's best move :)

Rh8+ its obvius, there is really no alternative. Finding the win is another story though. I just got wiped around the board a couple of times trying to play it out with Fritz.

Apr-25-05  Gypsy: I think I found the finnish after the <64...Rg7+ 65.Kf8 Rg5> -- it goes 66.Qe4+! Kh8 (66...Rg6 67.Qf5) 67.Qd4+ Kh7 78.Qd7+ Kh8 79.Qf7! and now its all over 79...Rg1 80.Qf6+ Kh7 81.Qf5+ Kh8 82.Qe5+ Kh7 83.Qe4+ Kh8 84.Qd4+ Kh7 85.Qxg1 and 86.Qg7#.
Apr-25-05  Gypsy: Thnx <samikd>, Your solution even saves two moves over mine.
Apr-25-05  RookFile: I think any play of at least expert
sees Rh8+ within 2 seconds. Chessgames is quite wrong here, the move doesn't win, black should have been able to establish a blockade to keep the white king out.
Apr-25-05  The beginner: Yes the game is drawn after

55 Qxh3

Until black make the mistake

59 ..Kg8

This move alows the white king to come up and lock the black king in the corner. Black must control square f7 to keep it draw i think.

Rg1,Rg7,or Rg8 and black would stay draw.

Apr-25-05  samikd: <Gypsy><: Thnx <samikd>, Your solution even saves two moves over mine.> now I am not so sure myself :) what does W do after B plays 67..Rg8 ??
Apr-25-05  samikd: in my solution, I mean...
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