Author: Dann Corbit
Date: 20:10:20 05/10/02
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On May 10, 2002 at 22:35:02, Jon Dart wrote: >There's a known position in the Classical Nimzo-Indian as follows: > >[D] r4rk1/p4ppp/2P5/q1pp1b2/4n3/P7/1BQNPPPP/R3KB1R b KQ - - > >Crafty has a book line here continuing Rab8 c7. My database shows several games >with this line, including Rogers-Ward, BCF ch-T 1997-8, a draw. Eliskases played >d4 against Bololjubow in 1937, another draw. But a search from this position >gives the continuation Ng3, with advantage to Black: > > > 10 3.31 -- 1. ... Ng3 > 10 3.99 -0.98 1. ... Ng3 2. Bc3 Qc7 3. Qb3 Nxh1 4. > Qxd5 Be6 5. Qe5 Qxe5 6. Bxe5 Rad8 > 10-> 10.66 -0.98 1. ... Ng3 2. Bc3 Qc7 3. Qb3 Nxh1 4. > Qxd5 Be6 5. Qe5 Qxe5 6. Bxe5 Rad8 > 11 13.44 ++ 1. ... Ng3!! > 11-> 29.14 -1.37 1. ... Ng3 2. Bc3 Qc7 3. Qb3 Nxh1 4. > Qxd5 Be6 5. Qe5 Qxe5 6. Bxe5 Rad8 > 12 34.77 -- 1. ... Ng3 > 12 37.50 -0.87 1. ... Ng3 2. Qc3 Qxc3 3. Bxc3 Nxh1 > 4. g4 Bxg4 5. Bg2 d4 6. Ba5 Rae8 7. > f3 d3 8. fxg4 Rxe2+ > 12-> 1:55 -0.87 1. ... Ng3 2. Qc3 Qxc3 3. Bxc3 Nxh1 > 4. g4 Bxg4 5. Bg2 d4 6. Ba5 Rae8 7. > f3 d3 8. fxg4 Rxe2+ > 13 2:07 -0.87 1. ... Ng3 2. Qc3 Qxc3 3. Bxc3 Nxh1 > 4. g4 Bxg4 5. Bg2 d4 6. Ba5 Rae8 7. > f3 d3 8. fxg4 Rxe2+ > time=3:20 cpu=99% mat=3 n=133137602 fh=93% nps=664k > ext-> chk=5470267 cap=361754 pp=602423 1rep=458117 mate=32558 > predicted=0 nodes=133137602 evals=24036969 > endgame tablebase-> probes done=0 successful=0 > hashing-> trans/ref=22% pawn=6% used=99% > >Arasan and Hiarcs give a similar result, at least at a few minutes' search time. >Ng3 is surprising, to say the least. Whether it's really good or not, I'm not >sure. ChessMaster says: Time Depth Score Positions Moves 0:00 2/5 -0.11 22367 1...Ng3 2. Qb3 Nxh1 3. Qxd5 Rad8 0:00 2/6 -1.25 46793 1...Ng3 2. Qb3 Nxh1 3. c7 Nxf2 4. Qxd5 Ne4 5. O-O-O 0:01 3/7 0.56 127158 1...Ng3 2. Bc3 Bxc2 3. Bxa5 Nxh1 4. Rc1 Bf5 5. Rxc5 0:04 3/8 0.46 446506 1...Ng3 2. Bc3 Bxc2 3. Bxa5 Nxh1 4. Rc1 Ba4 5. Rxc5 Rfc8 0:11 4/9 0.67 1316100 1...Ng3 2. Bc3 Bxc2 3. Bxa5 Nxh1 4. Rc1 Ba4 5. Rxc5 Rac8 6. c7 1:09 4/10 0.55 7812212 1...Ng3 2. Bc3 Qc7 3. Qb3 Nxh1 4. Qxd5 Be6 5. Qxc5 Rac8 6. Qd4 f5 3:33 5/11 0.19 24794988 1...Ng3 2. Bc3 Qd8 3. Qb2 Nxh1 4. Bxg7 Re8 5. Bf6 Rb8 6. Qc3 d4 In prose: The Chessmaster recommends: Knight to g3. Analysis: You move your knight to g3, which forks White's queen and White's rook at h1 and blocks White's pawn at g2. White responds by moving bishop to c3, which frees White's knight from the pin and threatens your queen. You move your queen to d8, which moves it to safety. White replies by moving queen to b2, which moves it to safety and seizes the open file. Your knight takes rook. White counters with bishop takes pawn, which threatens your rook at f8 and isolates your pawn at f7 and your pawn at h7. You move your rook to e8, which moves it to safety. White responds by moving bishop to f6, which threatens your queen and blocks your pawn at f7. You move your rook to b8, which threatens White's queen. White responds with the queen to c3, which moves it to safety and attacks your pawn at c5. You move your pawn to d4, which forks White's bishop at f6 and White's queen. As a result of this sequence of moves, you win a rook for a pawn. Additionally, your attack potential is greatly enhanced.
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