Author: Dann Corbit
Date: 14:45:59 02/21/02
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On February 21, 2002 at 17:15:56, Dann Corbit wrote: >On February 21, 2002 at 14:48:10, Bob Basham wrote: > >>If black replies with BxR, >>then Bxh6 and white wins! >> >>[D]r2q1r1k/2n1bpp1/1pp1p2p/p2nP3/P1RPN1Q1/R3BN2/1P3PPP/6K1 w - - >> >>I wonder if any chess programs play Qh5 in this position? > >Crafty likes Ra1 for a while, then switches to Bg5: > >depth time score variation (1) > 7 0.47 0.45 1. Ra1 Nb4 2. Rac1 Qd7 3. Ne1 Ncd5 > 4. Bf4 > 7-> 0.67 0.45 1. Ra1 Nb4 2. Rac1 Qd7 3. Ne1 Ncd5 > 4. Bf4 > 8 1.50 0.43 1. Ra1 Nb4 2. h3 b5 3. Rcc1 Ncd5 4. > Nc5 Bxc5 5. Rxc5 > 8-> 2.15 0.43 1. Ra1 Nb4 2. h3 b5 3. Rcc1 Ncd5 4. > Nc5 Bxc5 5. Rxc5 > 9 4.38 0.42 1. Ra1 Nb4 2. h3 b5 3. Rcc1 Ncd5 4. > Bd2 Qd7 5. Bf4 > 9-> 6.23 0.42 1. Ra1 Nb4 2. h3 b5 3. Rcc1 Ncd5 4. > Bd2 Qd7 5. Bf4 > 10 14.27 0.40 1. Ra1 Nb4 2. b3 b5 3. Rcc1 Qd5 4. > Rc3 Rfc8 5. h3 Kg8 > 10-> 18.86 0.40 1. Ra1 Nb4 2. b3 b5 3. Rcc1 Qd5 4. > Rc3 Rfc8 5. h3 Kg8 > 11 47.58 0.34 1. Ra1 Qd7 2. Bd2 b5 3. axb5 cxb5 4. > Rcc1 b4 5. Nc5 Qc6 6. b3 Rfc8 > 11-> 57.99 0.34 1. Ra1 Qd7 2. Bd2 b5 3. axb5 cxb5 4. > Rcc1 b4 5. Nc5 Qc6 6. b3 Rfc8 > 12 1:24 0.22 1. Ra1 Nxe3 2. fxe3 Nd5 3. Re1 Qd7 > 4. Qh3 b5 5. axb5 cxb5 6. Rcc1 Rac8 > 7. Nc5 Qc7 > 12-> 4:22 0.22 1. Ra1 Nxe3 2. fxe3 Nd5 3. Re1 Qd7 > 4. Qh3 b5 5. axb5 cxb5 6. Rcc1 Rac8 > 7. Nc5 Qc7 > 13 4:55 0.21 1. Ra1 Nxe3 2. fxe3 Nd5 3. Re1 Rc8 > 4. b3 Bb4 5. Ned2 f5 6. Qg6 f4 7. e4 > Ne3 > 13 9:21 0.27 1. Bg5 Bxg5 2. Nfxg5 b5 3. Rc2 bxa4 > 4. Nh3 Nb5 5. Rg3 g6 6. Nc5 h5 7. Qe4 > Kg8 8. Nxa4 > 13-> 11:00 0.27 1. Bg5 Bxg5 2. Nfxg5 b5 3. Rc2 bxa4 > 4. Nh3 Nb5 5. Rg3 g6 6. Nc5 h5 7. Qe4 > Kg8 8. Nxa4 >time=16:39 cpu=100% mat=0 n=490149845 fh=89% nps=490k >ext-> chk=11558832 cap=1107331 pp=335470 1rep=2069692 mate=115490 >predicted=0 nodes=490149845 evals=0 >endgame tablebase-> probes done=0 successful=0 On the other hand, analysis after choosing Qh5 shows black slightly worse: [D]r2q1r1k/2n1bpp1/1pp1p2p/p2nP2Q/P1RPN3/R3BN2/1P3PPP/6K1 b - - acd 12; acn 500684198; acs 1000; ce -48; pv Kg8 Ra1 Qd7 Bd2 b5 Rc2 Bb4 Bxb4 Nxb4 Nc5 Qe7 Rc3 Ncd5; So Qh5 may be the best move, after all.
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