Author: John Merlino
Date: 12:18:23 01/05/02
Go up one level in this thread
On January 05, 2002 at 07:46:36, Uri Blass wrote: >On January 05, 2002 at 07:29:52, Gian-Carlo Pascutto wrote: > >>>The mate in the second position is too long and not relevant >>>for practical games. >> >>A mate is a mate. I do not see how finding a long mate is >>not practical and finding a short one suddely is. >> >>If so, what is the limit? Mate in 15 ? Mate in 16? >> >>-- >>GCP > >I think that mates in more than 20 moves that can be practically proved are rare >in practical games if you do not use tablebases. > >I think that chessmaster is one of the best in finding mates from practical >games when tablebases are not involved. > >It may be interesting to do a competition of finding mates in the middle game >between programs based on the ssdf games when there are at least 16 pieces on >the board so we can hope that tablebases are not going to help much. > >I expect chessmaster to be best in most of the positions. > >Here is the first position for this competition > >Sphinx Dominator - MChess 486 >[D]1r4k1/5pp1/6bp/p7/PpP1n3/1Q1p2PP/1P3qBK/N2R4 b - - 0 1 > >Analysis by Yace 0.99.56: > >31...Qxg2+ 32.Kxg2 > +- (4.94) Depth: 1 00:00:00 >31...Nxg3 > -+ (-2.69) Depth: 1 00:00:00 >31...Qxg3+ 32.Kh1 > -+ (-3.00) Depth: 1 00:00:00 >31...Qxg3+ 32.Kg1 Rd8 > -+ (-3.10) Depth: 2 00:00:00 >31...Qxg3+ 32.Kg1 Nf2 33.Rf1 Nxh3+ > -+ (-3.92) Depth: 3 00:00:00 >31...Qxg3+ 32.Kg1 Nf2 33.Re1 > -+ (-3.95) Depth: 3 00:00:00 >31...Qxg3+ 32.Kg1 Qe3+ 33.Kh2 Qf4+ 34.Kg1 Nd2 35.Qa2 > -+ (-4.02) Depth: 4 00:00:00 >31...Qxg3+ 32.Kg1 Nc5 33.Qa2 Bf5 34.Kf1 > -+ (-4.32) Depth: 5 00:00:00 17kN >31...Qxg3+ 32.Kg1 Qf2+ 33.Kh1 Qe2 34.Rxd3 Qxd3 35.c5 > -+ (-4.72) Depth: 6 00:00:00 114kN >31...Qxg3+ 32.Kg1 Qf2+ 33.Kh1 Qe2 34.Rb1 Nd2 35.Qd1 Nxb1 36.Qxb1 > -+ (-4.79) Depth: 6 00:00:00 114kN >31...Qxg3+ 32.Kg1 Qf2+ 33.Kh1 Qe2 34.Rb1 d2 35.Qxb4 axb4 36.Bxe4 > -+ (-5.19) Depth: 7 00:00:00 161kN >31...Qxg3+ 32.Kg1 Nc5 33.Qa2 d2 34.Qa3 bxa3 35.bxa3 > -+ (-6.19) Depth: 7 00:00:00 161kN >31...Qxg3+ 32.Kg1 Nc5 33.Qa2 d2 34.Nb3 Nxb3 35.Rf1 Be4 > -+ (-6.66) Depth: 7 00:00:00 161kN >31...Qxg3+ 32.Kg1 Qf2+ 33.Kh2 Nd2 34.Rxd2 Qxd2 35.Kg1 Qe3+ 36.Kh2 Qf4+ 37.Kg1 >Qc1+ 38.Qd1 Qxd1+ 39.Kh2 > -+ (-7.06) Depth: 8 00:00:01 481kN >31...Qxg3+ 32.Kg1 Qf2+ 33.Kh2 Nd2 34.Rxd2 Qxd2 35.Kg3 Qe1+ 36.Kh2 Qe5+ 37.Kg1 >Qxb2 38.Qxb2 Bh5 > -+ (-7.84) Depth: 8 00:00:01 527kN >31...Nxg3 32.Rxd3 Ne2 33.Qd1 Bxd3 34.c5 Qxc5 35.Qxd3 Qc7+ 36.Qd6 Qxd6+ 37.Kh1 > -+ (-7.85) Depth: 8 00:00:02 1059kN >31...Nxg3 32.Rxd3 Ne2 33.Qd1 Bxd3 34.Qf1 Qg3+ 35.Kh1 Nf4 36.Qf3 > -+ (-8.24) Depth: 8 00:00:02 1059kN >31...Nxg3 32.Rxd3 Ne2 33.Qd1 Bxd3 34.Qf1 Qg3+ 35.Kh1 Bxc4 36.Qf3 Qe1+ 37.Qf1 > -+ (-8.34) Depth: 9 00:00:04 2028kN >31...Qxg3+ 32.Kg1 Qf2+ 33.Kh2 Nd2 34.Rxd2 Qxd2 35.Kg3 Qe1+ 36.Kh2 d2 37.Qxb4 >axb4 38.Bf1 > -+ (-8.35) Depth: 9 00:00:04 2028kN >31...Qxg3+ 32.Kg1 Nf2 33.Rf1 Nxh3+ 34.Kh1 Qh4 35.Bxh3 Qxh3+ 36.Kg1 Qe3+ 37.Kh2 >Qe2+ 38.Kg1 Qg4+ 39.Kh2 Be4 40.Qc2 dxc2 41.Nxc2 > -+ (-9.64) Depth: 9 00:00:07 3431kN >31...Qxg3+ 32.Kg1 Ng5 33.Kf1 Rb6 34.Bf3 Nxf3 35.Qc3 bxc3 36.Rd2 > -+ (-14.64) Depth: 9 00:00:11 5449kN >31...Qxg3+ 32.Kg1 Ng5 33.Nc2 Nxh3+ 34.Kh1 Nf2+ 35.Kg1 Nxd1 > -+ (-14.64) Depth: 9 00:00:11 5449kN >31...Qxg3+ 32.Kg1 Ng5 33.Nc2 Nxh3+ 34.Kh1 Nf2+ 35.Kg1 Nxd1 36.Ne1 Re8 37.Nc2 >Qxg2+ 38.Kxg2 dxc2 39.Kh3 c1Q > -+ (-15.04) Depth: 10 00:00:14 6847kN >31...Qxg3+ 32.Kg1 Ng5 33.Nc2 Nxh3+ 34.Kh1 Nf2+ 35.Kg1 Be4 36.Ne1 Ng4 37.Qc2 dxc2 >38.Kf1 cxd1Q 39.Bxe4 > -+ (-16.04) Depth: 10 00:00:14 6891kN >31...Qxg3+ 32.Kg1 Ng5 33.Rxd3 Bxd3 34.Qd1 Be4 35.Qg4 Nf3+ 36.Qxf3 Bxf3 37.Kf1 >Qxg2+ 38.Ke1 > -+ (-18.72) Depth: 10 00:00:20 9694kN >31...Qxg3+ 32.Kg1 Ng5 33.Qxb4 axb4 34.Kf1 Be4 35.Rd2 Re8 36.Nc2 dxc2 37.Kg1 c1Q+ >38.Rd1 > -+ (-19.12) Depth: 11 00:00:31 16324kN >31...Qxg3+ 32.Kg1 Ng5 33.Rxd3 Bxd3 34.Qd1 Nxh3+ 35.Kh1 Nf2+ 36.Kg1 Nxd1 37.Nb3 >Qe3+ 38.Kh2 > -+ (-19.61) Depth: 11 00:00:45 23928kN >31...Qxg3+ 32.Kg1 Ng5 33.Rxd3 Bxd3 34.Qc3 bxc3 35.Nc2 > -+ (-20.01) Depth: 12 00:01:10 37280kN >31...Qxg3+ 32.Kg1 Ng5 33.Qxd3 Nxh3+ 34.Kh1 Nf2+ 35.Kg1 Nxd3 36.Rd2 Qe1+ 37.Kh2 >Qxd2 38.c5 Nxc5 39.Kh1 Qxb2 40.Ba8 > -+ (-21.01) Depth: 12 00:01:13 39564kN >31...Qxg3+ 32.Kg1 Ng5 33.Kf1 Nxh3 34.Qc2 dxc2 35.Rb1 > -+ (-26.01) Depth: 12 00:01:14 40170kN >31...Qxg3+ 32.Kg1 Ng5 33.Rxd3 Bxd3 34.Qxd3 Nxh3+ 35.Kh1 Nf2+ 36.Kg1 Nxd3 > -+ (-#11) Depth: 12 00:03:39 138282kN > >(Blass, Tel-aviv 05.01.2002) > >Uri Not sure how to "score" this one. ;-) CM8000 (default personality) finds Mate in 12 (not 11) in 52 seconds on my PIII-733: Time Depth Score Positions Moves 0:00 1/4 -4.74 4348 1...Qxg3+ 2. Kg1 Qe3+ 3. Kh2 Nd2 4. Qa2 Qf4+ 5. Kh1 Nxc4 0:00 2/6 -6.79 45771 1...Qxg3+ 2. Kg1 Nf2 3. Rd2 Nxh3+ 4. Kh1 Qe1+ 5. Kh2 Qxd2 6. Kxh3 0:01 2/6 -8.81 92260 1...Nxg3 2. Rxd3 Ne2 3. Qd1 Be4 4. Qf1 Qxf1 5. Bxf1 Bxd3 6. Nb3 0:01 3/7 -9.98 140009 1...Nxg3 2. Rxd3 Ne2 3. Qd1 Bxd3 4. Qf1 Qxf1 5. Bxf1 Bxc4 6. Bg2 0:02 3/7 -10.66 225766 1...Qxg3+ 2. Kg1 Ng5 3. Kh1 Nf3 4. Bxf3 Qxf3+ 5. Kg1 Be4 6. Rd2 Qe3+ 7. Kf1 Qxd2 0:05 3/8 -17.98 560427 1...Qxg3+ 2. Kg1 Ng5 3. Qxd3 Bxd3 4. Rxd3 Nxh3+ 5. Kh1 Nf2+ 6. Kg1 Nxd3 7. Kh1 Nxb2 8. Bf1 Qh4+ 9. Kg2 Nxc4 10. Bxc4 Qxc4 0:13 4/9 -18.29 1640560 1...Qxg3+ 2. Kg1 Ng5 3. Qxd3 Bxd3 4. Rxd3 Nxh3+ 5. Kh1 Nf2+ 6. Kg1 Nxd3 7. Kh1 Nf2+ 8. Kg1 Ng4 9. Nc2 Qh2+ 10. Kf1 Qf4+ 11. Kg1 Qc1+ 12. Bf1 Qxc2 0:52 5/10 -Mate12 6788484 1...Qxg3+ 2. Kg1 Ng5 3. Qxd3 Bxd3 4. Rxd3 Nxh3+ 5. Kh1 Nf2+ 6. Kg1 Nxd3 7. Nc2 Nf4 8. Ne3 Qxe3+ 9. Kh1 Ne2 10. Kh2 Qg3+ 11. Kh1 Qh4+ 12. Bh3 Qxh3# 3:13 6/11 -Mate12 25026686 1...Qxg3+ 2. Kg1 Ng5 3. Qxd3 Bxd3 4. Rxd3 Nxh3+ 5. Kh1 Nf2+ 6. Kg1 Nxd3 7. Nc2 Nf4 8. Ne1 Qxe1+ 9. Bf1 Ne2+ 10. Kh1 Qxf1+ 11. Kh2 Qg1+ 12. Kh3 Qg3# jm
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.