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Igor Zakharevich vs Alexander Bratchenko
White Nights (2001), St Petersburg RUS, rd 4, Jun-12
King's Indian Defense: Averbakh. Benoni Defense Advance Variation (E75)  ·  1/2-1/2

ANALYSIS [x]

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Kibitzer's Corner
Jun-26-04
Premium Chessgames Member
  kevin86: This should be a win for white-his technique is wrong,he should be chasing black to a8 or h1.

Like other sports such as baseball and basketball,fundamentals are not taught as much today. White lost a half game because of it.

Jun-26-04  acirce: Why didn't he even try? 39 more moves before Black could claim a draw...
Jun-27-04
Premium Chessgames Member
  kevin86: He should have tried,a blunder is still possible-white may even have stumbled into a mating chance.
Aug-20-04  Dick Brain: This endgame play from a grandmaster is amazing to me.
Aug-20-04  Dick Brain: Anyone have tablebases to check? I think 90 Nd4 may be better than 90 Kd4. Anyhoo that's what I would play over the board.

Here's how White should have finished it:

92. Kc3 Ka4 93. Nd4 (Get your knight to the closest center square to the opponents king that is opposite color of your bishop to start things off) Ka5 94. Nb5! Kb6 (he's not getting away) 95. Kb4 Kc6 96. Be6 Kb6 97. Bd5

You have to know the method of moves 94-97 in the alternative moves I gave to do this endgame!

Aug-20-04  acirce: <Anyone have tablebases to check? I think 90 Nd4 may be better than 90 Kd4.> Of course everything wins as long as you know the correct plan. But in fact 90.Nd4 is slightly worse than 90.Kd4, the former being mate in 26 and the latter only in 25! ;-) http://www.lokasoft.nl/uk/tbweb.htm shows us that the fastest win is 90.Kd3 though with mate in 23. I'm mostly posting this to inform about the possibility to check tablebases online.
Aug-20-04
Premium Chessgames Member
  Chessical: <Dick Brain> You are correct. Mate with a N and B can only be forced in the two corners which are the same colour as the bishop controls, and the enemy K must be driven to that corner corner:

<92.Kc3> Ka4 93.Nd4 Ka3 94.Nc2+ Ka4 95.Kd4 Ka5 96.Kc5 Ka4 97.Bd5 Ka5 98.Bc6 Ka6 99.Ne3 Ka7 100.Kd6 Kb6 101.Nc4+ Ka7 102.Kc7 Ka6 103.Bd7 Ka7 104.Bb5 Ka8 105.Nb6+ Ka7 106.Nc8+ Ka8 107.Bc6#

Another example is: Marshall vs Jasnogrodsky, 1898

Aug-22-04  Dick Brain: <acrice> Thanks. The King moves are pretty logical in order to constrain the defender to the side, but seeing the win for me is much easier when I have the knight at the perfect pivot square where he can go where I want in one move. So although not objectively best, 90 Nd4 is at least clearest to me since I can see I will soon get into the decisive sequence no matter where Black runs.

<Chessical>Your line is objectively best for defense, i.e. the defender should try to stay in the wrong-color corner to last the most moves, but Muller and Lamprecht sez that the draw happens most commonly when the defender is able to escape by running from containment. So what I showed was the way to thwart this attempt.

Oct-14-06  McCool: Here are the games that are draws in KBN vs K Robert Zeier vs M Pirs, 2001

R Valenti vs A P Smith, 2001

V Macek vs K Kachiani, 2005,

and this one.

Dec-30-06  Bob726: If you want to knokw how to try to mate with K+B+N vs K, check out this game: A Caoili vs M Baron, 2002

Jan-17-09  WhiteRook48: I cannot believe how a 2487 cannot do a KBN vs K checkmate.
Feb-28-09  WhiteRook48: someone else may check the tablebase!
Oct-29-17
Premium Chessgames Member
  Bubo bubo: <acirce: Why didn't he even try? 39 more moves before Black could claim a draw...>

Maybe the draw was due to White running out of time?

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