Author: Terry McCracken
Date: 08:41:52 10/31/01
Go up one level in this thread
On October 31, 2001 at 09:04:08, Uri Blass wrote: >On October 31, 2001 at 08:25:23, Terry McCracken wrote: > >>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. > >No >Ng1 is the computer move and after Rxh7 programs can see a clear advantage for >black. > Not according to Fritz 6 or me! Hey I looked through this mate as well. I don't rely on computers to work everything out. Sometimes I make mistakes, and so do the programmes! That is why I chose this position, I doubt any programme out there can easily solve this mate from the begining. Maybe some can with enough time? >New position >r5k1/ppp3bp/3p4/3Pn3/1n1KP1p1/1P3rP1/PBB1N2R/R2Q4 w - - 0 1 > >Analysis by Deep Fritz: > >4.Rxh7-- > +- (7.44) Depth: 1/5 00:00:00 >4.Rxh7-- Kxh7 > +- (3.53) Depth: 1/9 00:00:00 >4.Nf4! > +- (3.56) Depth: 1/19 00:00:00 >4.Nf4! c5+ 5.dxc6 > +- (4.44) Depth: 1/20 00:00:00 1kN >4.a3! > +- (4.47) Depth: 1/20 00:00:00 1kN >4.a3! c5+ 5.dxc6 > +- (4.75) Depth: 1/20 00:00:00 2kN >4.Nc3! > +- (4.84) Depth: 1/20 00:00:00 2kN >4.Nc3! Rxg3 > +- (6.66) Depth: 1/20 00:00:00 2kN >4.Bc3! > +- (6.75) Depth: 1/20 00:00:00 2kN >4.Bc3! c5+ 5.dxc6 > +- (7.03) Depth: 1/20 00:00:00 3kN >4.Bc3 c5+ 5.dxc6 Nxc2+ 6.Qxc2 > +- (7.03) Depth: 2/12 00:00:00 3kN >4.Bc3-- > +- (6.56) Depth: 3/16 00:00:00 4kN >4.Bc3-- Rf1 5.Ke3 Rxd1 > +- (3.97) Depth: 3/17 00:00:00 8kN >4.Qd2! > +- (4.00) Depth: 3/19 00:00:00 22kN >4.Qd2! c5+ 5.dxc6 Nexc6+ 6.Kc4 Bxb2 > +- (4.25) Depth: 3/19 00:00:00 23kN >4.Qd2-- > +- (3.94) Depth: 4/20 00:00:00 25kN >4.Qd2-- b5 5.Qxb4 Nc6# > -+ (-#2) Depth: 4/20 00:00:00 32kN >4.Bc3! > -+ (-#3) Depth: 4/20 00:00:00 39kN >4.Nc1! > -+ (-11.72) Depth: 4/20 00:00:00 65kN >4.Nc1! Ned3+ 5.Kc4 Nxb2+ 6.Kxb4 Bc3+ 7.Ka3 Nxd1 > µ (-1.19) Depth: 4/20 00:00:00 71kN >4.Ng1! > µ (-1.16) Depth: 4/20 00:00:00 81kN >4.Ng1! Ned3+ 5.e5 Bxe5+ 6.Kc4 Nxb2+ 7.Kxb4 a5+ 8.Kb5 > ± (0.88) Depth: 4/20 00:00:00 93kN >4.Rxh7! > ± (0.91) Depth: 4/20 00:00:00 99kN >4.Rxh7! Kxh7 5.Bc3 c5+ 6.dxc6 Nexc6+ 7.Kc4 > +- (3.28) Depth: 4/20 00:00:00 104kN >4.Rxh7-- > +- (2.97) Depth: 5/19 00:00:00 117kN >4.Rxh7-- b5 5.Rxg7+ Kxg7 6.Bd3 Rxd3+ 7.Qxd3 > = (0.13) Depth: 5/21 00:00:00 134kN >4.Nf4! > = (0.16) Depth: 5/26 00:00:00 274kN >4.Nf4! b5 5.Qxf3 Nxf3+ > = (0.25) Depth: 5/26 00:00:00 302kN >4.Ng1! > ² (0.28) Depth: 5/26 00:00:00 338kN >4.Ng1! Ned3+ 5.e5 Bxe5+ 6.Kc4 Nxb2+ 7.Kxb4 a5+ 8.Kb5 Nxd1 > ± (0.88) Depth: 5/26 00:00:00 348kN >4.Ng1 Ned3+ 5.e5 Bxe5+ 6.Kc4 Nxb2+ 7.Kxb4 a5+ 8.Kb5 Nxd1 9.Rxd1 > ± (0.88) Depth: 6/26 00:00:00 439kN >4.Ng1 Ned3+ 5.e5 Bxe5+ 6.Kc4 Nxb2+ 7.Kxb4 a5+ 8.Kb5 Nxd1 9.Rxd1 > ± (0.88) Depth: 7/28 00:00:01 937kN >4.Ng1-- > ² (0.56) Depth: 8/32 00:00:01 1499kN >4.Ng1-- c5+ 5.dxc6 Ned3+ 6.Kc4 b5+ 7.Kxb5 Rb8+ 8.Ka4 Nxb2+ 9.Ka3 Nc4+ > = (0.00) Depth: 8/32 00:00:02 1844kN >4.Ng1 c5+ 5.dxc6 Ned3+ 6.Kc4 b5+ 7.Kxb5 Rb8+ 8.Ka4 Nxb2+ 9.Ka3 Nc4+ > = (0.00) Depth: 9/34 00:00:05 4437kN >4.Ng1 c5+ 5.dxc6 Ned3+ 6.Kc4 b5+ 7.Kxb5 Rb8+ 8.Ka4 Nxb2+ 9.Ka3 Nc4+ > = (0.00) Depth: 10/32 00:00:11 10055kN >4.Ng1 c5+ 5.dxc6 Ned3+ 6.Kc4 b5+ 7.Kxb5 Rb8+ 8.Ka4 Nxb2+ 9.Ka3 Nxd1 > = (-0.25) Depth: 11/36 00:00:30 26824kN >4.Ng1 Rxg3 5.Ne2 Rf3 6.Ng1 c5+ 7.dxc6 Ned3+ 8.Kc4 b5+ 9.Kxb5 Rb8+ > = (-0.22) Depth: 12/37 00:02:04 103964kN > >(Blass, Tel-aviv 31.10.2001) > >New position >r5k1/ppp3bp/3p4/3Pn3/1n1KP1p1/1P3rP1/PBB1N2R/R2Q4 w - - 0 1 > >Analysis by Crafty 18.12: > >4.a3 > +- (9.13) Depth: 1/6 00:00:00 >4.a3 c5+ 5.dxc6 Nexc6+ 6.Kc4 Bxb2 7.axb4 Bxa1 8.Qxa1 > +- (5.65) Depth: 2/6 00:00:00 >4.Bc3 Nxc2+ 5.Qxc2 Rd3+ 6.Qxd3 Nxd3+ 7.Kxd3 Bxc3 8.Nxc3 > +- (7.63) Depth: 2/6 00:00:00 >4.Bc3 c5+ 5.dxc6 Nexc6+ 6.Kc4 b5+ 7.Kxb5 Bxc3 8.Nxc3 Rxc3 9.Qxg4+ > +- (6.77) Depth: 3/14 00:00:00 >4.Bc3 Rf1 5.Ke3 Rxd1 6.Bxd1 > +- (6.15) Depth: 4/17 00:00:00 >4.Bc3 c5+ 5.dxc6 bxc6 6.Bxb4 Nd3+ 7.e5 Bxe5+ 8.Ke4 d5# > -+ (-#5) Depth: 5/19 00:00:01 >4.a4 c5+ 5.dxc6 bxc6 6.Bd3 c5+ 7.Kc3 Rxd3+ 8.Qxd3 Nexd3+ 9.Kd2 Bxb2 10.Rf1 > -+ (-3.82) Depth: 5/19 00:00:01 >4.Rh5 Ned3+ 5.Kc4 Nxb2+ 6.Kxb4 a5+ 7.Kb5 Nxd1 8.Rxd1 > +- (3.33) Depth: 5/19 00:00:01 >4.Bc1 c5+ 5.dxc6 bxc6 6.Be3 Ned3+ 7.Kc4 d5+ 8.exd5 cxd5+ 9.Kb5 Rxe3 10.Bxd3 Nxd3 > +- (3.46) Depth: 5/19 00:00:02 >4.Bc1 b5 5.Rb1 Nec6# > -+ (-#2) Depth: 6/24 00:00:04 2022kN >4.a4 c5+ 5.dxc6 bxc6 6.Bd3 c5+ 7.Kc3 Rxd3+ 8.Qxd3 Nexd3+ 9.Kd2 Nxb2 10.Rf1 N2d3 > -+ (-3.52) Depth: 6/24 00:00:05 2434kN >4.Rxh7 c5+ 5.dxc6 bxc6 6.Rxg7+ Kxg7 7.Bd3 Rxd3+ 8.Qxd3 Nbxd3 9.Ba3 Rd8 > ³ (-0.55) Depth: 6/24 00:00:06 3009kN >4.Ng1 Ned3+ 5.e5 Bxe5+ 6.Kc4 Nxb2+ 7.Kxb4 Bc3+ 8.Ka3 Nxd1 9.Rxd1 > +- (2.09) Depth: 6/24 00:00:08 3962kN >4.Ng1 c5+ 5.dxc6 Ned3+ 6.Kc4 b5+ 7.Kxb5 Rb8+ 8.Ka4 Nxb2+ 9.Ka3 Nc4+ 10.Ka4 Nb2+ > = (0.00) Depth: 7/26 00:00:10 5108kN >4.Ng1 c5+ 5.dxc6 Ned3+ 6.e5 Bxe5+ 7.Kc4 b5+ 8.Kxb5 Rb8+ 9.Ka4 Nxb2+ 10.Ka3 Nc4+ >11.Ka4 Nb2+ > = (0.00) Depth: 8/29 00:00:18 9300kN >4.Ng1 c5+ 5.dxc6 Ned3+ 6.e5 Bxe5+ 7.Kc4 b5+ 8.Kxb5 Rb8+ 9.Ka4 Nxb2+ 10.Ka3 Nc4+ >11.Ka4 Nb2+ > = (0.00) Depth: 9/29 00:00:31 16576kN >4.Ng1 c5+ 5.dxc6 Ned3+ 6.e5 Bxe5+ 7.Kc4 b5+ 8.Kxb5 Rb8+ 9.Ka4 Nxb2+ 10.Ka3 Nc4+ >11.Ka4 Nb2+ > = (0.00) Depth: 10/33 00:01:10 37379kN > >(Blass, Tel-aviv 31.10.2001) > >Uri Don't blindly trust computer analysis! Terry
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