Author: Matthias Gemuh
Date: 09:26:51 03/08/04
Go up one level in this thread
On March 08, 2004 at 11:35:30, Tord Romstad wrote: >In the following ECM-GCP position, Bb7 is listed as the only solution move. >Gothmog 0.4.6 initially wants to play Bb7, but then switches to Rxg2+, which >it claims is a mate in 11. Later it switches back to Bb7, with a mate in 9. > >Do I have a bug, or do both moves lead to mate? > >[d]2b3k1/p4ppp/7q/2Q5/8/P3r1P1/1r4BP/R3R1K1 b - - bm Bb7; id "ECM.1197"; > > 1 1.31 0.00 185 Rxe1+ Rxe1 > 2 1.62 0.00 654 Rxe1+ Rxe1 Bb7 > 3 7.72 0.03 4844 Bb7 Rxe3 Rxg2+ Kf1 Qf6+ > 4 10.34 0.10 13575 Bb7 Kh1 Rxg2 Qxa7 Rxh2+ > 5 13.06 0.24 32829 Bb7 Re2 Rbxe2 Bh3 Qxh3 > 6 12.25 0.51 74306 Bb7 Qc8+ Bxc8 > 7 12.25 0.72 121708 Bb7 Qc8+ Bxc8 > 8 >= 15.97 3.05 680582 Rxg2+ Kxg2 Bb7+ Kf2 Rf3+ Kg2 Rxa3+ Kg1 > Rxg3+ Kf1 Qh3+ Ke2 Rg2+ Qf2 Rxf2+ Kxf2 > Qf3+ > 8 15.97 3.60 797200 Rxg2+ Kf1 Ba6+ Kxg2 > 9 22.16 7.67 1793331 Rxg2+ Kf1 Ba6+ Kxg2 Bb7+ Kf2 Rf3+ Kg2 > Rxa3+ Re4 Bxe4+ Kf1 Rxa1+ Ke2 Ra2+ Qc2 > Rxc2+ Ke1 Qxh2 >10 >= #103 12.12 3032510 Rxg2+ Kf1 Ba6+ Kxg2 Bb7+ Kf2 Rf3+ Kg2 > Rxa3+ Re4 Bxe4+ Kf1 Rxa1+ Ke2 Ra2+ Qc2 > Rxc2+ Ke1 Qc1# >10 #11 25.64 6897653 Rxg2+ Kf1 Ba6+ Kxg2 Bb7+ Kf2 Rf3+ Kg2 > Rxa3+ Kg1 Rxg3+ Kf1 Qh3+ Ke2 Rg2+ Qf2 > Rxf2+ >11 >= #10 1:11 21815599 Bb7 Qc8+ Bxc8 >11 >= #9 1:21 26474808 Bb7 Qc8+ Bxc8 >11 <= #9 1:23 27349074 Bb7 Qc8+ Bxc8 Red1 Rxg2+ Kxg2 Bh3+ Kg1 > Re1+ Rxe1 Qb6+ Kh1 Qc6+ Re4 Qxe4+ Kg1 Qd4+ > Kh1 Qxa1# >11 #9 1:23 27349074 Bb7 Qc8+ Bxc8 Red1 Rxg2+ Kxg2 Bh3+ Kg1 > Re1+ Rxe1 Qb6+ Kh1 Qc6+ Re4 Qxe4+ Kg1 Qd4+ > Kh1 Qxa1# > >Tord BigLion does not yet output a PV ;(. [1] (-1.03) 1 ...Rxe1 2.Rxe1 Qa6 (00h:00m:00s) [2] (-0.48) 1 ...-Rxe1 (00h:00m:00s) [2] (-0.42) 1 ...Rxe1 2.Rxe1 Bd7 3.Qxa7 (00h:00m:00s) [3] (-0.36) 1 ...Rxe1 2.Rxe1 Rxg2 3.Kxg2 Qd2 4.Qf2 Bh3 5.Kg1 (00h:00m:00s) [4] (-0.91) 1 ...+Rxe1 (00h:00m:00s) [4] (-0.86) 1 ...Bb7 2.Qxe3 Rxg2 3.Kf1 Qf6 4.Qf4 Qxf4 5.gxf4 Rxh2 (00h:00m:00s) [5] (-1.41) 1 ...+Bb7 (00h:00m:01s) [5] (-3.06) 1 ...+Bb7 (00h:00m:01s) [5] (-6.14) 1 ...Bb7 2.Rxe3 Rxg2 3.Kf1 Qf6 4.Rf3 Qxf3 5.Ke1 (00h:00m:02s) [6] (-6.69) 1 ...+Bb7 (00h:00m:02s) [6] (-8.34) 1 ...+Bb7 (00h:00m:03s) [6] (-9.86) 1 ...Bb7 2.Kh1 Rxg2 3.Qc8 Bxc8 4.Kxg2 Qh3 5.Kg1 (00h:00m:07s) [7] (-10.41) 1 ...+Bb7 (00h:00m:08s) [7] (-11.16) 1 ...Bb7 2.Qc8 Bxc8 3.Red1 Qg5 4.Rdc1 Bg4 5.Rc7 (00h:00m:18s) [8] (-11.71) 1 ...+Bb7 (00h:00m:37s) [8] (-11.16) 1 ...-Bb7 (00h:00m:41s) [8] (-13.99) 1 ...Rxg2 2.Kf1 Bb7 3.Qc8 Bxc8 4.Rxe3 Qxe3 5.Kxg2 Qd2 6.Kf3 Bb7 7.Kg4 Qd4 8.Kg5 Qxa1 (00h:01m:34s) [9] (-14.54) 1 ...+Rxg2 (00h:01m:41s) [9] (-16.19) 1 ...+Rxg2 (00h:02m:09s) [9] (-Mate in 11) 1 ...Rxg2 2.Kxg2 Bb7 (00h:02m:31s) [9] (-Mate in 11) 1 ...Rxg2 2.Kxg2 Bb7 (00h:02m:31s)
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