Author: Slater Wold
Date: 23:22:21 08/02/03
Go up one level in this thread
On August 03, 2003 at 00:50:02, Mike Byrne wrote: >On August 03, 2003 at 00:33:57, John Merlino wrote: > >>On August 02, 2003 at 22:05:27, Anson T J wrote: >> >>>[d]2r2rk1/p3ppbp/6p1/8/8/QPqBBP2/P1P3PP/2KR3R w - - 0 20 >>> >>>Junior 8 played 20. Bf2 >>>= (0.00) Depth: 16 0:03:29 >>> >>> >>>The King 3.23 SKR then played >>>20... Rfd8! >>>-+ (-8.87) Depth: 13 0:10:47 >>> >>>and won. >>> >>>Does any other engine also want to play 20. Bf2 ? I'm not sure if White's >>>position lost before move 20. or if it was a blunder on move 20. that cost >>>Junior the game. >>> >>>Please post your evals and comments: >> >>Chessmaster 9000 (default personality), after a reasonably long search on a >>P4-2.4G, seems to think that White's best chance is Qa4, with only a slight eval >>advantage to Black (-0.18). After 20.Bf2, a 1-minute search gives an eval of >>-1.37 for 20...Rfd8. >> >>But my vote is for "excellent attack by CM", starting with 18...Qc3!! How many >>engines would not play this move and not gxf5? >> >>[D]1r3rk1/p3ppbp/2q3p1/5B2/8/QP2BP2/P1P3PP/2KR3R b - - 0 18 >> >>Majestic Chess, for example, needs 18 seconds on my P4-2.4 to find Qc3.... >> >>jm > >excellent attack by CM gets my vote... > >3:00 for Crafty to find Qc3 on my "slow" dual 1.7 Ghz P4 - > >New game >1r3rk1/p3ppbp/2q3p1/5B2/8/QP2BP2/P1P3PP/2KR3R b - - 0 1 > >Analysis by Crafty 19.04 ST: > >1...gxf5 2.Qxe7 Rfc8 3.Rd2 > +- (1.89) Depth: 4 00:00:00 >1...gxf5 2.Qc5 Qa6 3.Rd7 Qxa2 4.Qxe7 > +- (1.72) Depth: 5 00:00:00 >1...gxf5 2.Qc5 Qa6 3.Rd7 Qxa2 4.Qxe7 > +- (1.72) Depth: 5 00:00:00 >1...gxf5 2.Qxe7 Rfc8 3.c4 Rc7 4.Rd8+ Rxd8 5.Qxd8+ > +- (1.58) Depth: 6 00:00:00 105kN >1...gxf5 2.Qxe7 Rfc8 3.c4 Rc7 4.Rd8+ Rxd8 5.Qxd8+ > +- (1.58) Depth: 6 00:00:00 175kN >1...gxf5 > ± (1.25) Depth: 7 00:00:00 381kN >1...gxf5 2.Qxa7 Rfc8 3.c4 Rb7 4.Qa5 e6 5.Rd8+ Bf8 6.Rxc8 Qxc8 > ± (1.16) Depth: 7 00:00:01 737kN >1...gxf5 2.Qxa7 Rfc8 3.c4 Rb7 4.Qa5 e6 5.Rd8+ Bf8 6.Rxc8 Qxc8 > ± (1.16) Depth: 7 00:00:01 1089kN >1...gxf5 2.Qc5 Qf6 3.Qd4 Qe6 4.Qd3 Qc8 5.Kb1 > +- (1.61) Depth: 8 00:00:02 1909kN >1...gxf5 2.Qc5 Qf6 3.Qd4 Qe6 4.Qd3 Qc8 5.Kb1 > +- (1.61) Depth: 8 00:00:05 4351kN >1...gxf5 2.Qc5 Qe6 3.Bf4 Rbc8 4.Qd5 Qe2 5.Rd2 Qa6 > +- (1.53) Depth: 9 00:00:06 5033kN >1...gxf5 2.Qc5 Qe6 3.Bf4 Rbc8 4.Qd5 Qe2 5.Rd2 Qa6 > +- (1.53) Depth: 9 00:00:07 6344kN >1...gxf5 2.Qc5 Qf6 3.Qd4 Qc6 4.Qd3 Bc3 5.Qxf5 > ± (1.32) Depth: 10 00:00:11 9702kN >1...gxf5 2.Qc5 Qf6 3.Qd4 Qc6 4.Qd3 Bc3 5.Qxf5 > ± (1.32) Depth: 10 00:00:23 20422kN >1...gxf5 2.Qc5 Qf6 3.Qd4 Qc6 4.Qd7 Qf6 5.Rd4 Qe5 6.Re1 Rfc8 > ± (1.20) Depth: 11 00:00:37 33055kN >1...gxf5 2.Qc5 Qf6 3.Qd4 Qc6 4.Qd7 Qf6 5.Rd4 Qe5 6.Re1 Rfc8 > ± (1.20) Depth: 11 00:01:00 53334kN >1...gxf5 2.Qc5 Qf6 3.Bd4 e5 4.Bb2 Qa6 5.Bxe5 Rb5 6.Qd6 Qxa2 7.Rhe1 > ± (1.34) Depth: 12 00:01:20 69887kN >1...Qc3 > ± (0.87) Depth: 12 00:03:00 155326kN > >(Byrne, Secane, PA USA 03.08.2003) I'd have to agree. After looking & looking, I'm impressed any engine would have that kind of positional know-how. Rebel 12.0 beta 1 & beta 9 don't get it in ~3 minutes (13 ply or so). And even the personality I'm working on now (which has scored about 20% better than the default or beta 9 against other engines) doesn't see it in 5 minutes. However... Fritz 7 1r3rk1/p3ppbp/2q3p1/5B2/8/QP2BP2/P1P3PP/2KR3R b - - 0 1 Analysis by Fritz 7: 1...gxf5 2.Qc5 Qf6 3.Qd4 Qc6 4.Qc4 Qxc4 5.bxc4 Rb2 ± (0.78) Depth: 8/26 00:00:00 537kN 1...gxf5 2.Qc5 Qf6 3.Qd4 Qc6 4.Qd3 e6 5.Qc4 Bb2+ 6.Kb1 ² (0.59) Depth: 9/26 00:00:00 950kN 1...gxf5 2.Qc5 Qf6 3.Qd4 Qe6 4.Qd3 Rfc8 5.Bxa7 Rb4 6.Be3 ² (0.62) Depth: 10/26 00:00:02 2558kN 1...Qc3! ² (0.59) Depth: 10/28 00:00:03 3533kN 1...Qc3! ² (0.44) Depth: 10/28 00:00:03 3813kN 1...Qc3! = (0.12) Depth: 10/30 00:00:04 4506kN 1...Qc3 2.Bd3 Rfd8 3.Rhf1 Rxd3 4.Rxd3 Qa1+ 5.Kd2 Qxf1 6.Qxe7 Qxg2+ 7.Kc1 Qh1+ 8.Rd1 = (-0.22) Depth: 10/30 00:00:05 6451kN 1...Qc3 2.Bd3 Rfd8 3.Bf2 Rxd3 4.Rxd3 Qa1+ 5.Kd2 Qxh1 6.Qxe7 Rf8 7.Rd8 = (-0.16) Depth: 11/32 00:00:09 10405kN 1...Qc3 2.Bd3 Rfd8 3.Bf2 Rxd3 4.Rxd3 Qa1+ 5.Kd2 Qxh1 6.Qxe7 Bh6+ 7.Ke2 a6 8.Rd8+ Rxd8 = (-0.03) Depth: 12/36 00:00:16 17875kN 1...Qc3 2.Bd3 Rfd8 3.Bf2 Rxd3 4.Rxd3 Qa1+ 5.Kd2 Qxh1 6.Qxe7 Bh6+ 7.Ke2 a6 8.Rd8+ Rxd8 = (-0.03) Depth: 12/36 00:00:20 23248kN (, 03.08.2003) I'd like to see an eval from CM9k, but I don't own it. Maybe I should. ;)
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