Author: Uri Blass
Date: 02:22:59 11/28/02
Go up one level in this thread
On November 28, 2002 at 05:01:29, Ingo Bauer wrote: >Hi Martin > >>I think Nxf7 is winning, although Ruffian didn't really see the win: >> >>1.Nxh7 Kxh7 2.Qh5+ Kg8 3.Bxg6 Qe7 4.Re3 Bxd4 5.Rh3 Bxf2+ 6.Kh1 Qg7 (pv at >>depth 15.01) >>and now (instead of Bh7+ with a draw) Bh6! Qe5 Qg4! wins. > >Even worse! Ruffian is not seeing the win even with the right line. Here is >ruffians analysis in your given position. > >[D]r4rk1/pp1b2q1/1nn1p1B1/3p3Q/8/2N4R/PP3bPP/R1B4K w - - > > 9.00 0:01 +3.15 7.Bh6 Qe5 8.Qg4 Qd4 9.Bh7+ Kf7 10.Rf3+ Ke7 11.Qg5+ Qf6 >12.Rxf6 Rxf6 (1.773.662) 1323.6 > 10.01 0:02 +3.50++ 7.Bh6 (3.052.884) 1310.2 > 10.01 0:09 +4.18 7.Bh6 Qh8 8.Be8 Bd4 9.Rg3+ Bg7 10.Rxg7+ Qxg7 11.Bxg7 Rfxe8 >12.Qh8+ Kf7 13.Rf1+ Ke7 14.Qh4+ Kd6 15.Qf6 (14.243.166) 1432.9 > 11.01 0:18 +4.00 7.Bh6 Qh8 8.Be8 Bd4 9.Rg3+ Bg7 10.Rxg7+ Qxg7 11.Bxg7 Rfxe8 >12.Qh8+ Kf7 13.Rf1+ Ke7 14.Qh4+ Kd6 15.Qf4+ e5 16.Qf7 (26.834.161) 1427.3 > 12.01 0:27 +4.35++ 7.Bh6 (37.868.399) 1396.3 > 12.01 0:44 +5.36 7.Bh6 Qh8 8.Be8 Bd4 9.Rg3+ Bg7 10.Rxg7+ Qxg7 11.Bxg7 Kxg7 >12.Qg6+ Kh8 13.Bxd7 Nxd7 14.Qh6+ Kg8 15.Qxe6+ Rf7 16.Nxd5 Raf8 (63.287.943) >1407.3 > 13.01 1:11 +5.71++ 7.Bh6 (97.812.423) 1363.9 > 13.01 1:46 +5.74 7.Bh6 Qh8 8.Be8 Bd4 9.Rg3+ Bg7 10.Rxg7+ Qxg7 11.Bxg7 Kxg7 >12.Qg6+ Kh8 13.Bxd7 Nxd7 14.Qh6+ Kg8 15.Qxe6+ Rf7 16.Rf1 Nd8 17.Qxd5 >(148.653.499) 1401.9 > 13.02 2:32 +7.07 7.Bh7+ Kh8 8.Bh6 Qxh7 9.Bg7+ Kxg7 10.Qxh7+ Kf6 11.Rf3+ Ke5 >12.Qg7+ Kd6 13.Rxf8 Be3 14.Rxa8 Nxa8 15.Qg3+ Ke7 16.Qxe3 Nb6 (212.148.079) >1392.4 > 14.01 3:15 +6.88 7.Bh7+ Kh8 8.Bh6 Qxh7 9.Bg7+ Kxg7 10.Qxh7+ Kf6 11.Rf3+ Ke5 >12.Qg7+ Kd6 13.Rxf8 Bd4 14.Nb5+ Kc5 15.Nxd4 Rxf8 16.Nb3+ Kb5 17.Qxf8 Ka6 >(274.619.158) 1403.6 > 15.01 5:26 +7.23++ 7.Bh7+ (469.904.381) 1438.5 > 15.01 6:56 +7.46 7.Bh7+ Kh8 8.Bh6 Qxh7 9.Bg7+ Kxg7 10.Qxh7+ Kf6 11.Rf3+ Ke5 >12.Qg7+ Kd6 13.Rxf8 Bd4 14.Nb5+ Kc5 15.Nxd4 Rxf8 16.Nb3+ Kb5 17.Qxf8 Nc4 18.Qa8 >(594.257.440) 1425.2 >best move: Bg6-h7 time: 8:43.252 min n/s: 1.469.546 CPU 99.0% nodes: >768.954.990 > >First it considers Bh6 but after a few Minutes it switches ti Bh7 (original >line) with a score and variant witch is defenately a dead game for black! >Now the question is why Ruffian considers the position as 0.00 in its original >analysis. > >Bye Ingo The answer is simple It did not search deep enough 5...Bxf2+ is bad and ruffian has no problem to avoid it You should never follow a long line in ruffian's analysis and decide that it is the right line. Uri
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