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Gregory Kaidanov vs Alexander Onischuk
11th Open (2002), Chicago USA, rd 7, May-27
Nimzo-Indian Defense: Saemisch Variation (E28)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Jul-31-19
Premium Chessgames Member
  plang: 6..d6 and 7..e5 is a sideline of the Samisch; 7..c5 and 7..d5 are the main lines. The stem game of this line was Szabo's win over Euwe at Budapest 1949 where 12 Nxe4 had been played. Kaidanov considered his 12 fxe to be stronger as it avoids the promising exchange sacrifice after 12 Nxe4..Nxe4 13 Bxe4..Rxe4 14 fxe..Qh4.

Kaidanov after 13..Nbd7:
"This is the first critical position of the game. I succeeded in removing the Black pawn from e4. However, the c4-bishop tremendously cramps my position. The c1-bishop is still a bad piece, and I can't castle. I considered 14 Ba2, but realized that after 14..b5 I still can do nothing to free my c1-bishop. I also didn't want to trade my light-squared bishop. One of the important chess principles is "When you have a bad bishop, don't trade the other bishop." I was struggling with my next move, when suddenly I saw a solution."

In Spassky-Uusi Rostov 1958 White had played 14 a4 and had gone on to win; 14 Ra2! was new. Black probably should have considered declining the sacrifice though after the rook had transferred to f2 it would have given White strong pressure on the f-file. Perhaps 17..Rf8 would have been an improvement. After 17..Qd8?! White's attack broke through; better was 18..Rxe4 19 Nxg7..Nf4! 20 exf..Kxg7 21 f5 when White still has good compensation (note that White should be careful not to put priority in winning the exchange back as that often leaves White with the worse minor piece). After Kaidanov's clever pawn sacrifice with 19 e5! and 20 e4! his bishop was decisively activated. 34..R4e7 would have been a tougher defense though White would still have won with 35 Qd6 followed by Bc4, Bd3 and Qg3.

Voted the 2nd best game in Informant 84. This is a very nice game - surprised it has not been commented on.

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