Author: Uri Blass
Date: 01:19:45 09/26/01
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On September 25, 2001 at 17:39:56, Uri Blass wrote: >On September 25, 2001 at 15:34:58, J. Wesley Cleveland wrote: > >>These are all positions where crafty gets the key move, but the evaluation is >>around zero. Does anyone know if these are supposed to be draws, or are they >>broken, or crafty did't see the full solution ? > > >>[D]6k1/1p3p2/4r1p1/1PPrbq1p/2QN4/P2R1P1P/R4KP1/8 b - - bm Bg3+; id "ECM.1208 1 >>min draw ???"; > >Here is some analysis: >1...Bg3+ 2.Kxg3 Qe5+ 3.f4 h4+ 4.Kh2 Qxf4+ 5.g3 hxg3+ 6.Kg2 Qe4+ and I prefer >black but I am not sure if black can win it. > >possible computer lines after the first 6 moves are 7.Kg1 Rf6 or 7.Rf3 Qxd4 > >Uri 7.Kg1 Rf6 is losing Here is Deep Fritz's opinion after 7...Rf6: New position [D]6k1/1p3p2/5rp1/1PPr4/2QNq3/P2R2pP/R7/6K1 w - - 0 1 Analysis by Deep Fritz: 8.Qxd5-- +- (2.72) Depth: 1/3 00:00:00 8.Qxd5-- Qxd5 ³ (-0.59) Depth: 1/5 00:00:00 8.Rxg3! = (0.19) Depth: 1/5 00:00:00 8.Rxg3! Rxd4 ± (1.00) Depth: 1/5 00:00:00 8.c6! ± (1.16) Depth: 1/5 00:00:00 8.c6! bxc6 +- (3.59) Depth: 1/6 00:00:00 8.Rad2! +- (3.72) Depth: 1/6 00:00:00 8.Rad2-- +- (3.25) Depth: 2/9 00:00:00 8.Rad2-- Qe1+ 9.Kg2 Rf2+ 10.Rxf2 +- (3.06) Depth: 2/9 00:00:00 8.Re2! +- (3.13) Depth: 2/9 00:00:00 8.Re2! Rxc5 +- (3.25) Depth: 2/9 00:00:00 8.Re2-- -+ (-#2) Depth: 3/6 00:00:00 8.Re2-- -+ (-#2) Depth: 3/8 00:00:00 8.Rad2! -+ (-13.31) Depth: 3/9 00:00:00 1kN 8.Rad2! Qe1+ 9.Kg2 Rf2+ 10.Rxf2 +- (3.06) Depth: 3/12 00:00:00 1kN 8.c6! +- (3.09) Depth: 3/12 00:00:00 2kN 8.c6! Qe1+ 9.Kg2 Rf2+ +- (3.16) Depth: 3/12 00:00:00 2kN 8.c6-- +- (2.63) Depth: 4/11 00:00:00 3kN 8.c6-- Qe1+ 9.Kg2 Rf2+ 10.Rxf2 Qxf2+ 11.Kh1 Qh2# -+ (-#4) Depth: 4/21 00:00:00 4kN 8.h4! -+ (-13.37) Depth: 4/21 00:00:00 5kN 8.h4! Rxc5 9.Qxc5 Qxd3 10.Re2 +- (2.25) Depth: 4/21 00:00:00 8kN 8.Qc3! +- (2.28) Depth: 4/21 00:00:00 8kN 8.Qc3! Rxc5 9.Qxc5 Qxd3 10.Kg2 +- (2.31) Depth: 4/21 00:00:00 9kN 8.Rd1! +- (2.34) Depth: 4/21 00:00:00 10kN 8.Rd1! Qe3+ 9.Kh1 Rh5 10.Rad2 Rxh3+ 11.Kg2 +- (2.66) Depth: 4/21 00:00:00 11kN 8.Rd1-- +- (2.34) Depth: 5/14 00:00:00 13kN 8.Rd1-- Qe3+ 9.Kh1 Qe4+ 10.Rg2 Rf2 11.Rdg1 Rxd4 = (-0.12) Depth: 5/15 00:00:00 16kN 8.Qc3! = (-0.09) Depth: 5/15 00:00:00 19kN 8.Qc3! Rxc5 9.Qxc5 Qxd3 10.Re2 +- (2.50) Depth: 5/17 00:00:00 25kN 8.Qc3-- +- (2.19) Depth: 6/18 00:00:00 31kN 8.Qc3-- Rxc5 9.Re3 Rf1+ 10.Kxf1 Qh1+ 11.Ke2 Qh2+ 12.Kf1 +- (1.53) Depth: 6/20 00:00:00 51kN 8.Qc3-- ± (1.22) Depth: 7/18 00:00:00 74kN 8.Qc3-- Rxc5 9.Ne6 Rf1+ 10.Kxf1 Qf5+ 11.Rf3 Qxh3+ 12.Rg2 Rxc3 ³ (-0.44) Depth: 7/21 00:00:00 102kN 8.Ra1! ³ (-0.41) Depth: 7/22 00:00:00 151kN 8.Ra1! Qf4 9.Rf3 Qe5 10.Raf1 Rxd4 11.Qb3 ² (0.41) Depth: 7/22 00:00:00 184kN 8.Rxg3! ² (0.44) Depth: 7/22 00:00:00 264kN 8.Rxg3! Rxd4 9.Qc2 Qd5 ² (0.59) Depth: 7/22 00:00:00 277kN 8.Rxg3-- ² (0.28) Depth: 8/18 00:00:00 302kN 8.Rxg3-- Rxd4 9.Qe2 Qd5 10.Qe8+ Kh7 11.Rag2 Rd1+ 12.Kh2 Qxc5 = (0.16) Depth: 8/20 00:00:00 381kN 8.Ra1! = (0.19) Depth: 8/20 00:00:00 422kN 8.Ra1! Qf4 9.Rf3 Qe5 10.Raf1 Rxd4 11.Qb3 Rxf3 12.Qxf3 ² (0.56) Depth: 8/21 00:00:00 471kN 8.Ra1 Qf4 9.Rf3 Qe5 10.Rxf6 Qxf6 11.Rf1 Rxd4 12.Qe2 Qe6 ² (0.53) Depth: 9/23 00:00:01 884kN 8.Ra1-- = (0.22) Depth: 10/26 00:00:02 1335kN 8.Ra1-- Rf2 9.Rxg3 Rxd4 10.Qc3 Rdd2 11.Qxd2 Rxd2 12.Rc1 Qd4+ 13.Kh1 Kf8 -+ (-3.94) Depth: 10/27 00:00:02 1753kN 8.Rxg3! -+ (-3.91) Depth: 10/28 00:00:05 3589kN 8.Rxg3! Rxd4 9.Qc1 Rc4 10.Qd1 Qf4 11.Qd8+ Kh7 12.Qd3 Rc1+ 13.Kg2 Rxc5 = (-0.03) Depth: 10/28 00:00:06 4377kN 8.Rxg3 Rxd4 9.Qe2 Qb1+ 10.Kh2 Rd1 11.Qg2 Rff1 12.Re3 Rh1+ 13.Kg3 Qxb5 ³ (-0.28) Depth: 11/29 00:00:09 6256kN 8.Rxg3-- ³ (-0.59) Depth: 12/31 00:00:16 11234kN 8.Rxg3-- ³ (-0.59) Depth: 12/32 00:00:19 13519kN 8.Rxg3 Rxd4 9.Qe2 Qb1+ 10.Kg2 Rd1 11.Rf3 Rxf3 12.Kxf3 Qf5+ 13.Kg2 Qd5+ µ (-0.78) Depth: 13/33 00:00:40 28698kN 8.Rxg3-- µ (-1.09) Depth: 14/33 00:01:07 48035kN 8.Rxg3-- Rxd4 9.Qc2 Qe1+ 10.Kh2 Rd1 11.Qg2 Rf1 12.Rxg6+ fxg6 13.Qxg6+ -+ (-2.69) Depth: 14/39 00:01:44 76416kN 8.Qc3! -+ (-2.66) Depth: 14/39 00:02:30 109882kN 8.Qc3! Rxc5 9.Ne6 Rf1+ 10.Kxf1 Qh1+ 11.Ke2 Rxc3 12.Rxc3 Qh2+ 13.Ke1 Qxa2 -+ (-2.50) Depth: 14/39 00:02:50 125319kN 8.Qc3-- -+ (-2.81) Depth: 15/31 00:03:51 169104kN 8.Qc3-- Rxc5 9.Ne6 Rf1+ 10.Kxf1 Qh1+ 11.Ke2 Rxc3 12.Rxc3 Qe4+ 13.Kd1 Qb1+ -+ (-3.28) Depth: 15/42 00:05:02 219617kN 8.Rxg3! -+ (-3.25) Depth: 15/42 00:05:39 247698kN 8.Rxg3! Rxd4 9.Qc2 Qe1+ 10.Kh2 Rd1 11.Qg2 Rf1 12.Rxg6+ fxg6 13.Qxg6+ Kf8 -+ (-2.78) Depth: 15/42 00:06:34 288576kN (Blass, Tel-aviv 26.09.2001) It leaves us with 7.Rf3 when Deep Fritz cannot see something decisive for black in a short time New position [D]6k1/1p3p2/4r1p1/1PPr4/2QNq3/P4RpP/R5K1/8 b - - 0 1 Analysis by Deep Fritz: 7...Qxf3+-- +- (4.87) Depth: 1/3 00:00:00 7...Qxf3+-- 8.Nxf3 +- (7.34) Depth: 1/3 00:00:00 7...Rxd4! +- (3.53) Depth: 1/3 00:00:00 7...Rxd4! 8.Qc2 Qd5 9.Kxg3 Re1 10.Qf2 Rdd1 11.h4 Rg1+ 12.Kh3 Rgf1 13.Qxf1 = (-0.13) Depth: 1/12 00:00:00 7...Rxd4 8.Qf1 Qd5 = (-0.09) Depth: 2/6 00:00:00 7...Rxd4 8.Qf1 Qd5 9.Rc2 = (0.06) Depth: 3/9 00:00:00 7...Rxd4 8.Qc2 Rc4 9.Qxe4 Rexe4 10.c6 = (0.09) Depth: 4/12 00:00:00 2kN 7...Rxd4 8.Qc2 Rc4 9.Qxe4 Rexe4 10.c6 bxc6 = (0.09) Depth: 5/13 00:00:00 6kN 7...Rxd4 8.Qc2 Qd5 9.Kxg3 Rc4 10.Qf2 Qxc5 = (-0.03) Depth: 6/15 00:00:00 16kN 7...Rxd4 8.Qc2 Qd5 9.Kxg3 Rc4 10.Qf2 Qxc5 11.Rxf7 = (-0.03) Depth: 7/16 00:00:00 42kN 7...Rxd4 8.Qc2 Qd5 9.Kxg3 Rc4 10.Qf2 Qxc5 11.Rxf7 Qxb5 = (-0.03) Depth: 8/19 00:00:00 93kN 7...Rxd4 8.Qc2 Qd5 9.Kxg3 Rc4 10.Qf2 Qxc5 11.Rxf7 Qxb5 12.Rf8+ = (-0.03) Depth: 9/20 00:00:00 221kN 7...Rxd4 8.Qc2 Qd5 9.Kxg3 Rd1 10.Qf2 Qg5+ 11.Kh2 Ree1 12.Qg2 = (-0.13) Depth: 10/24 00:00:00 625kN 7...Rxd4 8.Qb3 Rf6 9.a4 Rd5 10.Qe3 Qxf3+ 11.Qxf3 Rxf3 12.Kxf3 g5 13.Kxg3 = (-0.16) Depth: 11/28 00:00:05 3822kN 7...Rxd4 8.Qb3 Rf6 9.a4 Rd5 10.Qe3 Qxf3+ 11.Qxf3 Rxf3 12.Kxf3 = (-0.25) Depth: 12/28 00:00:09 6305kN 7...Rxd4 8.Qb3 Rf6 9.a4 Rd5 10.Qe3 Qxf3+ 11.Qxf3 Rxf3 12.Kxf3 = (-0.25) Depth: 13/33 00:00:22 15458kN 7...Rxd4 8.Qb3 Rf6 9.Qc3 g5 10.Rb2 g4 11.hxg4 Rh6 ³ (-0.34) Depth: 14/34 00:01:09 47463kN 7...Rxd4 8.Qb3 Rf6 9.a4 g5 10.b6 Rc4 11.Qe3 Qxf3+ 12.Qxf3 ³ (-0.28) Depth: 15/34 00:03:44 155522kN (Blass, Tel-aviv 26.09.2001) conclusion 1...Bg3+ 2.Kxg3 Qe5+ 3.f4 h4+ 4.Kh2 Qxf4+ 5.g3 hxg3+ 6.Kg2 Qe4+ 7.Rf3 Rxd4 is forced from white's point of view and the question is black can win after these moves Uri
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