Author: Terry McCracken
Date: 05:25:23 10/31/01
Go up one level in this thread
On October 31, 2001 at 07:08:43, Uri Blass wrote: >On October 31, 2001 at 03:28:12, Terry McCracken wrote: > >>On October 30, 2001 at 19:49:30, John Merlino wrote: >> >>>On October 30, 2001 at 18:24:41, Terry McCracken wrote: >>> >>>>[D]r5k1/ppp2r1p/3p3b/3Pn3/1n2PPp1/1P2K1P1/PBB1N2q/R2Q3R B >>>> >>>> >>>>How do your programmes evaluate this position? >>>>Do they find forced mate? >>>> >>>>Terry >>> >>>CM8000 does not find the mate in under 10 minutes on my PIII-600. It sees: >>> >>>1...Rxf4 2.Rxh2 Rf3+ 3.Kd4 c5+ 4.dxc6ep b5 5.Bd3 Nexc6+ 6.Kc3 Bg7+ 7.Kd2 Rxd3+ >>>8.Ke1 >>> >>>with an eval of -1.79. Is this the right line, and CM just hasn't seen far >>>enough yet? Is there really a forced mate? >>> >>Yes it is! Fritz with help finds a mate in 14, it was shorter in the >>actual game. >> >>I did this quickly so a shorter mate may exist? >> >> >>1...Rf4! 2.Rxh2..Rf3+ 3.Kd4..Bg7!!4.Rxh7 > >I do not understand Rxh7 >why not Ng1? Rxh7 is a computer move to delay mate. Ng1 and the mate come a couple moves sooner. > >Black may win by Rxg3 but I do not see a forced mate after it > >New position >[D]r5k1/ppp3bp/3p4/3Pn3/1n1KP1p1/1P3rP1/PBB4R/R2Q2N1 b - - 0 1 > >Analysis by Deep Fritz: > >4...Nxc2+! > +- (7.56) Depth: 1/3 00:00:00 >4...c5+ 5.dxc6 Nexc6+ 6.Kc4 > +- (4.75) Depth: 1/15 00:00:00 >4...c5+ 5.dxc6 Nexc6+ 6.Kc4 > +- (4.75) Depth: 1/15 00:00:00 >4...c5+ 5.dxc6 Nexc6+ 6.Kc4 > +- (4.75) Depth: 1/15 00:00:00 >4...Ned3+! > +- (4.69) Depth: 1/15 00:00:00 >4...Ned3+! 5.e5 Bxe5+ 6.Ke4 > +- (3.25) Depth: 1/15 00:00:00 1kN >4...Ned3+! > +- (2.81) Depth: 2/14 00:00:00 1kN >4...Ned3+! 5.e5 Bxe5+ 6.Kc4 Nxb2+ 7.Kxb4 > ± (0.94) Depth: 2/21 00:00:00 1kN >4...Ned3+ 5.e5 Bxe5+ 6.Kc4 Nxb2+ 7.Kxb4 a5+ 8.Kb5 > ± (0.87) Depth: 3/19 00:00:01 9kN >4...Ned3+ 5.e5 Bxe5+ 6.Kc4 Nxb2+ 7.Kxb4 a5+ 8.Kb5 Nxd1 > ± (0.87) Depth: 4/22 00:00:04 27kN >4...Ned3+ 5.e5 Bxe5+ 6.Kc4 Nxb2+ 7.Kxb4 a5+ 8.Kb5 Nxd1 9.Rxd1 > ± (0.87) Depth: 5/24 00:00:11 82kN >4...Ned3+ 5.e5 Bxe5+ 6.Kc4 Nxb2+ 7.Kxb4 a5+ 8.Kb5 Nxd1 9.Rxd1 > ± (0.87) Depth: 6/25 00:00:21 254kN >4...Ned3+ 5.e5 Bxe5+ 6.Kc4 Nxb2+ 7.Kxb4 Bc3+ 8.Ka3 Nxd1 9.Rxd1 Rxg3 10.Rxh7 > ± (0.87) Depth: 7/27 00:00:23 830kN >4...c5+! > ± (0.84) Depth: 7/31 00:00:24 1208kN >4...c5+! 5.dxc6 Ned3+ 6.Kc4 b5+ 7.Kxb5 Rb8+ 8.Ka4 Nxb2+ 9.Ka3 Nxd1 10.Rxd1 > = (-0.03) Depth: 7/31 00:00:24 1369kN >4...c5+ 5.dxc6 Ned3+ 6.Kc4 b5+ 7.Kxb5 Rb8+ 8.Ka4 Nxb2+ 9.Ka3 Nxd1 10.Rxd1 > = (-0.03) Depth: 8/27 00:00:25 2108kN >4...c5+ 5.dxc6 Ned3+ 6.Kc4 b5+ 7.Kxb5 Rb8+ 8.Ka4 Nxb2+ 9.Ka3 Nxd1 10.Rxd1 > = (-0.03) Depth: 9/30 00:00:28 5276kN >4...c5+ 5.dxc6 Ned3+ 6.Kc4 b5+ 7.Kxb5 Rb8+ 8.Ka4 Nxb2+ 9.Ka3 Nxd1 10.Rxd1 > = (-0.25) Depth: 10/33 00:00:37 13847kN >4...c5+-- > = (0.06) Depth: 11/35 00:01:12 45384kN >4...c5+-- 5.dxc6 Ned3+ 6.e5 Bxe5+ 7.Kc4 b5+ 8.Kxb5 Rb8+ 9.Ka4 Nxb2+ 10.Ka3 > = (0.00) Depth: 11/36 00:01:19 51404kN >4...Rxg3! > = (0.12) Depth: 11/36 00:01:33 62806kN >4...Rxg3! 5.Ne2 Rf3 6.Ng1 c5+ 7.dxc6 Ned3+ 8.Kc4 b5+ 9.Kxb5 Rb8+ 10.Ka4 > = (-0.22) Depth: 11/36 00:01:38 66522kN >4...Rxg3 5.Ne2 Rf3 6.Ng1 c5+ 7.dxc6 Ned3+ 8.Kc4 b5+ 9.Kxb5 Rb8+ 10.Ka4 > = (-0.22) Depth: 12/35 00:02:55 126315kN >4...Rxg3! > ³ (-0.53) Depth: 13/37 00:06:13 294192kN > >(Blass, Tel-aviv 31.10.2001) > > >..Rxh7 5.Ng1..c5+ 6.dxc ep. ..Nbc6+ >>7.Kd5..Nb4+ 8.Kd4..Ned3+ 9.e5..Bxe5+ 10.Kc4..Rc8+ 11.Kb5..Rc5+ 12.Ka4..Nxb2+ >>13.Kxb4..Bc3# >>>jm >>But mate it is! >> >> Terry
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