Eugene Znosko-Borovsky vs Wolfgang Unzicker (1949)

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Eugene Znosko-Borovsky vs Wolfgang Unzicker
Lucerne (1949), Lucerne SUI, Dec-??
Spanish Game: Open Variations. Howell Attack (C81) · 0-1

ANALYSIS [x]

FEN COPIED

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Jul-11-24		PawnSac: After < 27.f4 > click for larger view Stockfish evals this position as better for white. The best defense puts the Q on e7 with an eye on h4 battling for some dark squares. 45/83 -1.47 < 27...Qe7 28.Qf2 Qh4 29.Kg2 a5 30.a3 Rd8 31.Qxh4 Nxh4+ 32.Kg3 Ng6 > etc click for larger view Instead, Unzicker played 27...Qf7 and stockfish now gives white +1.95 @ 50/80 < 28.Kh2 Kh8 29.Rg1 fxg4 30.Qd3 Qf5 31.Qxf5 Bxf5 32.Bxf5 Rxf5 33.hxg4 Rxf4 34.Nxf4 Nxf4 > 35.Kg3 g5 36.Re1 etc In this line black goes in for wholesale liquidation trying to eliminate pressure, yet has to give up the exchange at the tail end of it. Now.. White should be winning! yet he will resign after only 5 more black moves. Something goes terribly wrong!

Jul-11-24		PawnSac: After < 28.g5? hxg5 > ... click for larger view White's eval has dropped from +1.95 to -0.60 and SF suggests 29.Qf2 but after white's < 29.fxg5? > his eval plummets to -2.55 @ 46/74. Black is winning with 29. ... Bd7 30.Qd1 Bc6 31.Rf2 Nxe5 etc

Jul-11-24		PawnSac: What did white do wrong? and how should he have played? click for larger view Stockfish evals this position as +1.95 @50/80. White should be close to winning. What did he do? He exchanged on g5 releasing the now passed pawn to do it's dirties. And what do you do with a passed pawn? PUSH IT! Well, it happens the fish thinks ..Bd7 is a little bit stronger than the immediate push, but whatever. White's best is to get the K off the g file with 28.Kh2 Kh8 then apply more pressure on the Ng6 with 29.Rg1 click for larger view Now white IS threatening to push g5 and break open the g file and K position. So ..fxg4 and not the immediate capture hg, or Bxg6 but the intermezzo move 30.Qd3! click for larger view Ng6 is attacked, but also pinned by Qh7# threat. Black is forced into wholesale liquidation to keep from losing the knight. So after ..Qf5 31.Qxf5 Bxf5 32.Bxf5 Rxf5 33.hxg4 click for larger view It appears black has maintained material equality, but now what? As it turns out, black can save the rook with ..Rff8 but white gets a monster passer on e6. The ending is worse than after ..Rxf4 34.Nxf4 Nxf4 giving up the exchange.

Jul-11-24		Retireborn: <Something goes terribly wrong!> White lost on time, according to Megabase, so his last few moves were probably bashed out without much thought. It's news to me that ZB (who started his career against Chigorin and Rubinstein) was still playing after WWII. He'd have been in his 60s then.

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