There is a tragedy. Too bad that Aristarch came to a halt. I seem to remember that he was working on a new version, and then simply abandoned it.Ajedrecista wrote:Hello Dann:
JetChess solves it in less than 20 mintes in my PC of 9 years old! However, JetChess does not show pv.Dann Corbit wrote:5b1k/PP3bnb/1Qb2N2/7b/4bP2/2Qb4/QN2N3/KQ6 w - - acd 13; acs 2514; bm Na4 Nc4 Nd1 Nd7 Ne8 Nxd3 Nxh5 Q1g1 Qaa3 Qbb4 Qbd4 Qd8 a8=Q a8=R b8=Q b8=R; ce 32756; dm 6; id "Leonid.391101"; pm Na4 Nc4 Nd1 Nd7 Ne8 Nxd3 Nxh5 Q1g1 Qaa3 Qbb4 Qbd4 Qd8 a8=Q a8=R b8=Q b8=R; pv b8=Q Bce8 Q8d6 Ne6 Qxf8+ Bhg8 Nd7+ Nd4 Qcxd4+ Kh7 Qfg7#;Dann Corbit wrote:How does your mate solver perform with this mate in 6:
[d]5b1k/PP3bnb/1Qb2N2/7b/4bP2/2Qb4/QN2N3/KQ6 w - -
It takes Chest "quite a while."
JetChess 1.0.0.0 (single core, 32-bit). Hash = 1 GB. Intel Pentium D930 (3 GHz) of year 2006:
Perft results:Code: Select all
5b1k/PP3bnb/1Qb2N2/7b/4bP2/2Qb4/QN2N3/KQ6 w - - 1 Qb1-c2 0 2 Qb1*d3 0 3 Qb1-c1 0 4 Qb1-d1 0 5 Qb1-e1 0 6 Qb1-f1 0 7 Qb1-g1 Mate 8 Qb1-h1 0 9 Qa2-b3 0 10 Qa2-c4 0 11 Qa2-d5 0 12 Qa2-e6 0 13 Qa2*f7 0 14 Qa2-a3 Mate 15 Qa2-a4 0 16 Qa2-a5 0 17 Qa2-a6 0 18 Qc3-b4 0 19 Qc3-a5 0 20 Qc3-d4 0 21 Qc3-e5 0 22 Qc3-d2 0 23 Qc3-e1 0 24 Qc3-c4 0 25 Qc3-c5 0 26 Qc3*c6 0 27 Qc3*d3 0 28 Qc3-b3 0 29 Qc3-a3 0 30 Qc3-c2 0 31 Qc3-c1 0 32 Qb6-c7 0 33 Qb6-d8 Mate 34 Qb6-c5 0 35 Qb6-d4 Mate 36 Qb6-e3 0 37 Qb6-f2 0 38 Qb6-g1 0 39 Qb6-a5 0 40 Qb6*c6 0 41 Qb6-a6 0 42 Qb6-b5 0 43 Qb6-b4 Mate 44 Qb6-b3 0 45 Nb2-a4 Mate 46 Nb2-c4 Mate 47 Nb2*d3 Mate 48 Nb2-d1 Mate 49 Ne2-d4 0 50 Ne2-g3 0 51 Ne2-c1 0 52 Ne2-g1 0 53 Nf6-d7 Mate 54 Nf6-e8 Mate 55 Nf6-g8 0 56 Nf6*h7 0 57 Nf6-d5 0 58 Nf6*e4 0 59 Nf6-g4 0 60 Nf6*h5 Mate 61 f4-f5 0 62 a7-a8Q Mate 63 a7-a8N 0 64 a7-a8R Mate 65 a7-a8B 0 66 b7-b8Q Mate 67 b7-b8N 0 68 b7-b8R Mate 69 b7-b8B 0 Multiple Solutions (checkmate in 6). Time: 1119.326 s (0:18:39.326)
Unique positions (en passant flag checked):Code: Select all
5b1k/PP3bnb/1Qb2N2/7b/4bP2/2Qb4/QN2N3/KQ6 w - - perft(1) = 69 perft(2) = 2,722 perft(3) = 187,614 perft(4) = 7,223,934 perft(5) = 497,393,135 perft(6) = 18,912,611,910
It is the first time I see JetChess reporting perft(2) =/= positions(2). I hope it is not a bug.Code: Select all
5b1k/PP3bnb/1Qb2N2/7b/4bP2/2Qb4/QN2N3/KQ6 w - - positions(1) = 69 positions(2) = 2,721 positions(3) = 103,763 positions(4) = 2,253,365 positions(5) = 58,386,326
Regards from Spain.
Ajedrecista.