Author: John Merlino
Date: 12:03:52 06/21/04
Go up one level in this thread
On June 21, 2004 at 14:54:03, David Dahlem wrote: >White is two pawns up, but i'm not sure it's a win. Can Black hold on? How does >White make progress? > >[D]8/6k1/1R4b1/3p1p1p/3P3P/4PPK1/4rBP1/8 w - - 0 1 > >Here is what Ruffian 2.1.0 says..... > > 5 00:00 10.968 365.600 +1.38 1.f4 Rc2 2.Kf3 Kf7 3.g3 > 6 00:00 14.602 365.050 +1.35 1.f4 Rc2 2.Kf3 Be8 3.g3 Bc6 > 7 00:00 22.817 190.141 +1.39 1.f4 Ra2 2.Kf3 Rc2 3.g3 Kf7 4.Rb1 > 8 00:00 39.944 266.293 +1.24 1.f4 Rc2 2.Kf3 Be8 3.g3 Bc6 4.Rb1 Kf6 > 9 00:00 65.609 328.045 +1.29 1.f4 Rc2 2.Rd6 Bf7 3.Kf3 Rb2 4.Rc6 Be8 >5.Rc1 > 10 00:00 109.346 390.521 +1.32 1.f4 Rc2 2.Kf3 Be8 3.Be1 Bc6 4.Bb4 Kf7 >5.Bc5 Bd7 > 11 00:00 258.132 487.041 +1.27 1.f4 Ra2 2.Kf3 Be8 3.g3 Ba4 4.Rb1 Kf6 >5.Be1 Bc2 6.Rb6+ Ke7 > 12 00:01 530.758 547.173 +1.21 1.f4 Ra2 2.Rb8 Kf6 3.Kf3 Bf7 4.g3 Ra1 >5.Rb6+ Be6 6.Rb7 Rc1 7.Ke2 > 13 00:02 1.550.307 587.237 +1.26 1.f4 Rc2 2.Rb8 Bf7 3.Kf3 Be6 4.Be1 Kf6 >5.Bb4 Bd7 6.g3 Rc8 7.Rb6+ Be6 > 14 00:05 3.222.708 582.768 +1.29 1.f4 Be8 2.Rd6 Bf7 3.Kf3 Rc2 4.Rb6 Be8 >5.g3 Kf7 6.Rd6 Ra2 7.Rb6 Ke7 8.Be1 > 15 00:07 4.257.138 592.916 +1.30 1.f4 Be8 2.Rd6 Bf7 3.Kf3 Rc2 4.Rb6 Be8 >5.Be1 Ba4 6.Bb4 Ra2 7.Rd6 Bd1+ 8.Kg3 Bb3 9.Rc6 > 16 00:11 7.071.774 596.270 +1.20 1.f4 Be8 2.Rd6 Bf7 3.Kf3 Ra2 4.Rd8 Kf6 >5.Rb8 Be6 6.g3 Ra1 7.Rf8+ Kg7 8.Re8 Kf6 9.Rb8 Bd7 > 16 00:28 17.525.381 606.414 +1.34 1.Rb8 Bf7 2.f4 Ra2 3.Kf3 Kf6 4.Be1 Be6 >5.Bb4 Bd7 6.Rb6+ Kf7 7.Bc5 Ba4 8.Rb1 Bc2 9.Rb8 > 17 00:35 21.360.429 606.313 +1.32 1.Rb8 Bf7 2.f4 Rc2 3.Kf3 Rc1 4.Rb7 Kf6 >5.Rb2 Be8 6.Ke2 Bc6 7.Kd2 Ra1 8.Bg3 Ke6 9.Kd3 > 18 01:17 46.661.843 605.997 +1.24 1.Rb8 Bf7 2.f4 Rc2 3.Kf3 Rc1 4.Rd8 Kf6 >5.Ra8 Be6 6.Ra2 Bd7 7.Ke2 Bb5+ 8.Kd2 Bc4 9.Ra7 Rb1 10.Bg3 > 19 03:17 117.569.373 596.798 +1.24 1.Rb8 Bf7 2.f4 Rc2 3.Kf3 Rc1 4.Rb7 Kf6 >5.Rb6+ Be6 6.Bg3 Ke7 7.Rb2 Bd7 8.Ke2 Ke6 9.Be1 Bc6 10.Ba5 Ba4 > >After 9 minutes, Ruffian switched to Bg1 with a score of +1.28, but Arena has a >bug and doesn't copy the last line of analysis to the clipboard. :-( > >Regards >Dave CM_SKR on an AMD 2500+ says that this looks suspiciously like a draw. Note that the PVs don't contain any captures or pawn moves. And, even though White is up two pawns, the eval is not very close to +2.... Time Depth Score Positions Moves 0:00 1/3 1.65 630 1.Rd6 Bf7 2.Rd7 Rc2 0:00 1/4 1.66 1793 1.Rd6 Bf7 2.Rd7 Rc2 3.Re7 0:00 1/4 1.67 2411 1.Rc6 Bf7 2.Rc7 Rb2 0:00 1/5 1.65 5066 1.Rc6 Bf7 2.Rc7 Rb2 3.Be1 0:00 1/6 1.61 12342 1.Rc6 Bf7 2.Rc7 Kf6 3.Bg1 Be6 0:00 1/6 1.65 13945 1.Rd6 Bf7 2.Rc6 Rb2 3.Be1 Re2 0:00 1/7 1.60 28498 1.Rd6 Bf7 2.Rc6 Rb2 3.Bg1 Be8 4.Rd6 0:00 1/8 1.62 52202 1.Rd6 Bf7 2.Rc6 Rb2 3.Bg1 Be8 4.Rc5 Bf7 5.Rc7 0:00 1/9 1.61 98568 1.Rd6 Bf7 2.Rc6 Rb2 3.Bg1 Be8 4.Rc5 Bf7 5.Rc7 Kf6 0:01 1/10 1.61 185632 1.Rd6 Bf7 2.Rc6 Rb2 3.Bg1 Be8 4.Rc5 Bf7 5.Rc7 Kf6 0:02 2/11 1.57 379607 1.Rd6 Bf7 2.Rc6 Rb2 3.Bg1 Be8 4.Rd6 Bf7 5.Kh3 Re2 6.Rc6 Rb2 0:03 3/12 1.59 908912 1.Rd6 Bf7 2.Rc6 Be8 3.Rc5 Bf7 4.Rc7 Kf6 5.Rb7 Rc2 6.Be1 Re2 0:07 4/13 1.57 1974219 1.Rd6 Bf7 2.Bg1 Kh7 3.Rf6 Bg6 4.Rb6 Kg7 5.Kh3 Bf7 6.Rc6 Re1 7.Bf2 Rb1 0:17 5/14 1.57 5136927 1.Rd6 Bf7 2.Bg1 Re1 3.Kh2 Re2 4.Rc6 Re1 5.Bf2 Re2 6.Kg1 Be8 7.Re6 Bf7 8.Re7 0:35 6/15 1.52 10960287 1.Rd6 Bf7 2.Bg1 Re1 3.Kf2 Rc1 4.Rb6 Be8 5.Bh2 Rc2+ 6.Kg3 Re2 7.Re6 Bf7 8.Re7 Kf6 1:39 7/16 1.54 31356575 1.Rd6 Bf7 2.Bg1 Re1 3.Kh2 Re2 4.Rc6 Be8 5.Rb6 Bf7 6.Kh3 Kf8 7.Kg3 Ke7 8.Bf2 Be6 4:00 8/17 1.57 77933573 1.Rd6 Bf7 2.Bg1 Re1 3.Kf2 Rc1 4.Rb6 Rc2+ 5.Kg3 Re2 6.Rc6 Kh7 7.Rf6 Bg6 8.Rb6 Be8 9.Kh3 Bd7 jm
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