Author: Robert Hyatt
Date: 08:26:06 01/02/02
Go up one level in this thread
On January 02, 2002 at 11:19:52, Uri Blass wrote: >[D]r1b4k/ppp2Bb1/6Pp/3pP3/1qnP1p1Q/8/PPP3P1/1K1R3R w - - bm Qd8+; > >It is WAC96 > >Qd8+ is a forced mate for white but b3 is also enough to win the game. > >I saw cases when stupid moves are considered as solutions for WAC only because >they are winning so in this case b3 should be considered as an alternative >solution: > >after b3 I gave yace to learn that Na3+ Kc1 is bad for black and it give the >folllowing analysis: >New position >r1b4k/ppp2Bb1/6Pp/3pP3/1qnP1p1Q/1P6/P1P3P1/1K1R3R b - - 0 1 > >Analysis by Yace 0.99.56: > >1...Qxb3+ 2.axb3 > +- (9.15) Depth: 1 00:00:00 >1...Nxe5 2.dxe5 > +- (2.61) Depth: 1 00:00:00 >1...f3 2.gxf3 > +- (1.57) Depth: 1 00:00:00 >1...Rb8 2.Bxd5 > ± (1.34) Depth: 1 00:00:00 >1...Bf5 2.Bxd5 > ± (1.12) Depth: 1 00:00:00 >1...c6 2.Qxf4 > ± (1.04) Depth: 1 00:00:00 >1...Ne3 > ² (0.26) Depth: 1 00:00:00 >1...Ne3 2.Qd8+ Qf8 > ² (0.48) Depth: 2 00:00:00 >1...Ne3 2.Qd8+ Qf8 3.Qxf8+ Bxf8 4.Rdg1 > = (0.07) Depth: 3 00:00:00 >1...Ne3 2.Qxf4 Bxe5 3.Rxh6+ Kg7 4.Qxe5+ Kf8 > ² (0.47) Depth: 4 00:00:00 >1...Ne3 2.Qxf4 Nf5 3.Bxd5 > +- (2.27) Depth: 4 00:00:00 >1...Bf5 2.Bxd5 Bxc2+ 3.Kc1 > +- (2.26) Depth: 4 00:00:00 >1...Bf5 2.Qxf4 Bd7 3.Bxd5 > +- (1.91) Depth: 4 00:00:00 >1...f3 2.Qd8+ Qf8 3.Qxf8+ Bxf8 4.bxc4 fxg2 5.Rdf1 > +- (1.90) Depth: 4 00:00:00 >1...f3 2.Qd8+ Qf8 3.Qxf8+ Bxf8 4.bxc4 fxg2 5.Rhg1 > +- (1.83) Depth: 4 00:00:00 >1...Nb6 2.Qd8+ Qf8 3.Rde1 > +- (1.82) Depth: 4 00:00:00 >1...Nb6 2.Qxf4 Qf8 3.Rdf1 > +- (1.76) Depth: 4 00:00:00 >1...Nb6 2.Qd8+ Qf8 3.Qxc7 Bg4 4.Rdf1 > +- (1.62) Depth: 5 00:00:00 49kN >1...Nb6 2.Qd8+ Qf8 3.Qxc7 Bg4 4.Rdf1 Qc8 5.Qxc8+ Rxc8 6.Rxf4 > +- (1.82) Depth: 6 00:00:00 129kN >1...Qf8 2.Kc1 Bf5 3.Qg5 Qa3+ 4.Kb1 > +- (1.81) Depth: 6 00:00:00 129kN >1...Qf8 2.Qxf4 Na3+ 3.Kc1 c6 4.Rdf1 Bd7 > +- (1.41) Depth: 6 00:00:00 129kN >1...Qf8 2.e6 Na3+ 3.Kc1 c6 4.e7 Bf5 5.exf8Q+ Bxf8 > +- (1.81) Depth: 7 00:00:01 402kN >1...Qf8 2.e6 Bxe6 3.Bxe6 Qa3 4.Qf6 Bxf6 5.bxc4 > +- (1.81) Depth: 7 00:00:01 402kN >1...Qf8 2.Qxf4 Na3+ 3.Kc1 b6 4.Rxh6+ Bxh6 5.Bxd5 > +- (1.49) Depth: 8 00:00:03 1176kN >1...Qf8 2.Qxf4 Na3+ 3.Kb2 Bd7 4.Rxh6+ Bxh6 5.Rh1 Qxf7 6.gxf7 Kg7 7.f8Q+ Rxf8 >8.Qxh6+ Kf7 > +- (1.89) Depth: 9 00:00:07 2235kN >1...Qf8 2.Qg5 Ne3 3.Rxh6+ Bxh6 4.Rh1 Ng4 5.e6 Bxe6 6.Bxe6 f3 7.Qxg4 > +- (2.33) Depth: 9 00:00:11 4029kN >1...Qf8 2.Qg5 Ne3 3.Rxh6+ Bxh6 4.Qf6+ Qg7 5.Rh1 Bh3 6.Rxh3 Ng4 7.Qxf4 Qxf7 >8.gxf7 Nxe5 > +- (2.73) Depth: 10 00:00:26 9166kN >1...Qf8 2.Qxf4 Bf5 3.Qxf5 Ne3 4.Rxh6+ Bxh6 5.Qf6+ Qg7 6.Rh1 Ng4 7.Qf4 c6 8.Qxg4 >Rf8 > +- (4.05) Depth: 10 00:00:44 15973kN >1...Qf8 2.Qxf4 Bf5 3.Qxf5 Ne3 4.Rxh6+ Bxh6 5.Qf6+ Qg7 6.Rh1 Ng4 7.Qf4 c6 8.g3 >Rf8 9.Qxg4 > +- (4.14) Depth: 11 00:01:53 41818kN >1...Qf8 2.Qxf4 Bf5 3.Qxf5 Ne3 4.Rxh6+ Bxh6 5.Qf6+ Qg7 6.Rh1 Ng4 7.Qf4 c6 8.Qxg4 >Qxf7 9.gxf7 Kh7 > +- (4.54) Depth: 12 00:03:42 79943kN >1...Qf8 2.Qxf4 Bf5 3.Qxf5 Ne3 4.Rxh6+ Bxh6 5.Qf6+ Qg7 6.Rh1 Ng4 7.Qf4 > +- (4.54) Depth: 12 00:04:00 87418kN >1...Qf8 2.Qxf4 Bf5 3.Qg5 Na3+ 4.Kb2 Nxc2 5.Rxh6+ Bxh6 6.Qf6+ Qg7 7.Rh1 Bxg6 >8.Be8 > +- (4.54) Depth: 13 00:11:00 218149kN > >(Blass, Tel-aviv 02.01.2002) > > >Uri If b3 isn't a forced mate, then I disagree. WAC is about finding the best move in a position. If several moves lead to the same score, then they are all reasonable solutions. But if one leads to +4 and one leads to a forced mate, the +4 is wrong, because the program simply isn't seeing deep enough to see the _real_ issue...
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