Author: Uri Blass
Date: 18:09:39 11/30/04
Go up one level in this thread
On November 30, 2004 at 20:53:25, John Merlino wrote: >On November 30, 2004 at 20:06:35, Anthony Cozzie wrote: > >>[D] r4r1k/p4ppp/2q1p3/2b1P1B1/2B1R1n1/P7/2Q2PPP/5RK1 b - - 0 1 >> >>Nxf2 might be the best move; I am not sure. Zappa prefers h5 to Nxf2, but it >>ranks both as better than +1 for white (both scores from white's point of view). >> >>1... h7-h5 2. h2-h3 Ng4xf2 3. Rf1xf2 Bc5xf2 4. Kg1xf2 Qc6-c5 5. Bg5-e3 Qc5xa3 6. >>Qc2-d1 Qa3-b2 7. Kf2-g3 Rf8-d8 8. Qd1xh5 Kh8-g8 >> = (1.22) Depth: 12/39 00:00:46.95 35143kN (749 KN/s, 0 splits, 0 aborts) >> >>1. Rf1xf2 Bc5xf2 2. Kg1xf2 Qc6-c5 3. Bg5-e3 Qc5xa3 4. Re4-h4 f7-f5 5. Bc4xe6 >>Qa3-e7 6. Qc2-c4 Ra8-d8 7. Rh4-d4 >> = (1.25) Depth: 11/32 00:00:05.22 4357kN (834 KN/s, 0 splits, 0 aborts) >> >>anthony > >CM9_R1 prefers Nxf2. This is on an AMD 2500: > >Time Depth Score Positions Moves >0:00 1/3 0.76 2536 1...Nxf2 2.Rxf2 Bxf2+ 3.Kxf2 Qc5+ > 4.Re3 Rac8 >0:00 1/4 0.88 8408 1...Nxf2 2.Rxf2 Bxf2+ 3.Kxf2 Rfc8 > 4.Kg1 Rab8 >0:00 1/5 0.98 29030 1...Nxf2 2.Rxf2 Bxf2+ 3.Kxf2 Qc5+ > 4.Be3 Qxa3 5.Rh4 >0:00 1/6 1.18 90454 1...Nxf2 2.Rxf2 Bxf2+ 3.Kxf2 Rfc8 > 4.Kg1 h6 5.Be7 Rab8 >0:00 1/6 1.08 146229 1...h5 2.Qe2 Rab8 3.Rf4 Qc7 4.Re1 > Bxa3 >0:01 1/7 1.08 400383 1...h5 2.Qe2 Rac8 3.Ba6 Nxf2 4.Rxf2 > Bxf2+ 5.Kxf2 Qc5+ 6.Kf1 >0:07 1/8 1.14 1623523 1...h5 2.h3 Nxf2 3.Rxf2 Bxf2+ 4.Kxf2 > Rac8 5.Be3 Qc7 6.Qb2 Rfd8 >0:15 1/9 1.00 3369897 1...h5 2.h3 Nxf2 3.Rxf2 Bxf2+ 4.Kxf2 > Qc5+ 5.Kf1 Qxa3 6.Rh4 Qa1+ 7.Kf2 > Kg8 8.Rxh5 >0:29 1/10 1.26 7043707 1...h5 2.h3 Nxf2 3.Rxf2 Bxf2+ 4.Kxf2 > Rac8 5.Be3 Rfd8 6.Rf4 Qc7 7.g3 Kg8 >0:36 1/10 0.78 8854620 1...Nxf2 2.Rxf2 Bxf2+ 3.Kxf2 Qc5+ > 4.Be3 Qxa3 5.Rh4 g6 6.Rf4 Rac8 > 7.Qc1 Qa5 8.Qb2 Rfd8 >0:49 1/11 1.00 12366924 1...Nxf2 2.Rxf2 Bxf2+ 3.Kxf2 Qc5+ > 4.Be3 Qxa3 5.Rh4 g6 6.Be2 Rac8 > 7.Qa4 Qb2 8.Bd4 Qc1 9.Qxa7 >1:38 1/12 0.82 25408784 1...Nxf2 2.Rxf2 Bxf2+ 3.Kxf2 Qc5+ > 4.Be3 Qxa3 5.Rh4 g6 6.Qd3 Qe7 7.Rf4 > Rfd8 8.Qc3 Rac8 9.Qb3 Rb8 >3:52 1/13 1.08 61544033 1...Nxf2 2.Rxf2 Bxf2+ 3.Kxf2 Qc5+ > 4.Be3 Qxa3 5.Rh4 g6 6.Be2 Rfc8 > 7.Qa4 Qc3 8.Qf4 Kg8 9.Qh6 Qxe5 > 10.Qxh7+ Kf8 > >jm Same for yace and yace givces only a small advantage for white. It seems that the main problem is that movei underestimates white's advantage. Yace is even worse than movei in that respect. Movei can see at least more than 0.5 pawns for white after some analysis. Junior 8.0.0.2 - movei00_8_295, Blitz:120'+10" r4r1k/p4ppp/2q1p3/2b1P1B1/2B1R1n1/P7/2Q2PPP/5RK1 b - - 0 1 Analysis by Yace 0.99.87: 24...Qxe4 25.Qxe4 +- (5.43) Depth: 1 00:00:00 24...Nxh2 25.Kxh2 Bxa3 +- (1.98) Depth: 1 00:00:00 24...Nxf2 25.Rxf2 Bxf2+ 26.Kxf2 ± (1.14) Depth: 1 00:00:00 24...h6 25.Rxg4 hxg5 ± (1.02) Depth: 1 00:00:00 24...h5 ² (0.64) Depth: 1 00:00:00 24...f5 ² (0.43) Depth: 1 00:00:00 24...f5 ² (0.43) Depth: 1 00:00:00 24...f5 25.exf6 Nxh2 ± (0.85) Depth: 2 00:00:00 24...f5 25.exf6 Bxf2+ 26.Rxf2 Nxf2 ± (1.23) Depth: 2 00:00:00 24...h5 25.Bf6 ± (1.14) Depth: 2 00:00:00 24...h5 25.Bd3 ± (0.71) Depth: 2 00:00:00 24...h5 25.Bd3 ± (0.71) Depth: 2 00:00:00 24...h5 25.h3 f5 ² (0.55) Depth: 3 00:00:00 24...h5 25.h3 f5 ² (0.55) Depth: 3 00:00:00 24...h5 25.h3 Nh6 26.Bxh6 ± (0.85) Depth: 4 00:00:00 24...Nxf2 25.Rxf2 Bxf2+ 26.Kxf2 Qc5+ 27.Re3 Rac8 28.Qc3 ± (0.84) Depth: 4 00:00:00 24...Nxf2 25.Rxf2 Bxf2+ 26.Kxf2 Qc5+ 27.Ke2 Qxa3 28.Rd4 ² (0.49) Depth: 4 00:00:00 24...Nxf2 25.Rxf2 Bxf2+ 26.Kxf2 Qc5+ 27.Ke2 Qxa3 28.Rd4 ² (0.49) Depth: 4 00:00:00 24...Nxf2 25.Rxf2 Bxf2+ 26.Kxf2 Qc5+ 27.Ke2 Qxa3 28.Rh4 h6 ² (0.35) Depth: 5 00:00:00 24...Nxf2 25.Rxf2 Bxf2+ 26.Kxf2 Qc5+ 27.Ke2 Qxa3 28.Rh4 h6 ² (0.35) Depth: 5 00:00:00 24...Nxf2 25.Rxf2 Bxf2+ 26.Kxf2 Qc5+ 27.Be3 Qxa3 28.Rh4 h6 29.Rd4 ² (0.44) Depth: 6/18 00:00:00 86kN 24...Nxf2 25.Rxf2 Bxf2+ 26.Kxf2 Qc5+ 27.Be3 Qxa3 28.Rh4 h6 29.Rd4 ² (0.44) Depth: 6/19 00:00:00 162kN 24...Nxf2 25.Rxf2 Bxf2+ 26.Kxf2 Qc5+ 27.Ke1 Qxa3 28.Rh4 h6 29.Qe4 Kg8 = (0.24) Depth: 7/21 00:00:01 331kN 24...Nxf2 25.Rxf2 Bxf2+ 26.Kxf2 Qc5+ 27.Ke1 Qxa3 28.Rh4 h6 29.Qe4 Kg8 = (0.24) Depth: 7/23 00:00:02 484kN 24...Nxf2 25.Rxf2 Bxf2+ 26.Kxf2 Qc5+ 27.Be3 Qxa3 28.Rh4 h6 29.Rh3 Qa1 30.Bc5 ² (0.33) Depth: 8/25 00:00:03 958kN 24...Nxf2 25.Rxf2 Bxf2+ 26.Kxf2 Qc5+ 27.Be3 Qxa3 28.Rh4 h6 29.Rh3 Qa1 30.Bc5 ² (0.33) Depth: 8/25 00:00:05 1569kN 24...Nxf2 25.Rxf2 Bxf2+ 26.Kxf2 Qc5+ 27.Be3 Qxa3 28.Rh4 g6 29.Qe4 Rfd8 30.Rf4 Kg8 = (0.22) Depth: 9/27 00:00:07 2451kN 24...Nxf2 25.Rxf2 Bxf2+ 26.Kxf2 Qc5+ 27.Be3 Qxa3 28.Rh4 g6 29.Qe4 Rfd8 30.Rf4 Kg8 = (0.22) Depth: 9/27 00:00:10 3515kN 24...Nxf2 25.Rxf2 Bxf2+ 26.Kxf2 Qc5+ 27.Be3 Qxa3 28.Rh4 g6 29.Rh3 Rac8 30.Bd4 Qb4 31.Rc3 ² (0.34) Depth: 10/30 00:00:19 6780kN 24...Nxf2 25.Rxf2 Bxf2+ 26.Kxf2 Qc5+ 27.Be3 Qxa3 28.Rh4 g6 29.Rh3 Rac8 30.Bd4 Qb4 31.Rc3 ² (0.34) Depth: 10/30 00:00:31 11531kN 24...Nxf2 25.Rxf2 Bxf2+ 26.Kxf2 Qc5+ 27.Be3 Qxa3 28.Rh4 g6 29.Qd1 Rfb8 30.Qd6 Rb2+ 31.Kf3 Qc3 = (0.22) Depth: 11/32 00:01:05 23941kN 24...Nxf2 25.Rxf2 Bxf2+ 26.Kxf2 Qc5+ 27.Be3 Qxa3 28.Rh4 g6 29.Qd1 Rfb8 30.Qd6 Rb2+ 31.Kf3 Qc3 = (0.22) Depth: 11/32 00:01:28 33518kN 24...Nxf2 25.Rxf2 Bxf2+ 26.Kxf2 Qc5+ 27.Be3 Qxa3 28.Rh4 g6 29.Bd4 Rfc8 30.Kg1 Qb4 31.Bf2 Kg8 32.Rf4 ² (0.34) Depth: 12/36 00:02:39 59708kN (Blass, Tel-Aviv 01.12.2004) Uri
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