Author: Heiner Marxen
Date: 04:50:10 09/19/01
Go up one level in this thread
On September 19, 2001 at 03:45:56, Tim Foden wrote:
>On September 18, 2001 at 22:23:36, Heiner Marxen wrote:
>
>>On September 18, 2001 at 22:10:00, Dieter Buerssner wrote:
>>
>>>On September 18, 2001 at 21:53:18, Heiner Marxen wrote:
>>>
>>>>Scanning for mates up to depth 6 Chest finds only one result:
>>>
>>>In the 201 postions, Yace found 7 mates with 10 s search time. If you are
>>>interested, which positions this were, I can look them up.
>>>
>>>Regards,
>>>Dieter
>>
>>That would be fine! That way we can confirm each other's results.
>
>I thought I'd join in this one :)
>
>Here are the mates GLC215 finds on the test suite (at 10s per position):
Fine! I'll merge in the results of Chest for depth=7:
> 3r3k/p1Q3bp/2p3p1/8/2P1BRn1/1P4Pb/P1N1q2P/6BK b - - bm Nf2+; id "ECM.1122";
> 5 0.21 +Mate07 52772 Nf2+ Bxf2 Rd1+ Bg1 Rxg1+ Kxg1 Bd4+ Kh1 Qd1+ Ne1
> Qxe1+ Rf1 Qxf1# {ht}
Chest agrees completely:
3r3k/p1Q3bp/2p3p1/8/2P1BRn1/1P4Pb/P1N1q2P/6BK b - - acn 2934937; acs 28; bm
Nf2+; ce 32754; dm 7; id "ECM.1122"; pv Nf2+ Bxf2 Rd1+ Bg1 Rxg1+ Kxg1 Bd4+ Kh1
Qd1+ Ne1 Qxe1+ Rf1 Qxf1#;
> 6k1/1pp2p2/p2p2q1/2PPb3/4r3/Pr4PK/2R5/2Q2NR1 b - - bm Rh4+; id "ECM.1179";
> 7 3.78 +Mate06 2624651 Rh4+ Kxh4 Qh7+ Qh6 Qxh6+ Kg4 f5+ Kxf5 Qh5+ Ke6 Qf7#
> {ht}
Chest says:
6k1/1pp2p2/p2p2q1/2PPb3/4r3/Pr4PK/2R5/2Q2NR1 b - - acn 46263143; acs 558; bm
Rh4+; ce 32754; dm 7; id "ECM.1179"; pv Rh4+ Kxh4 Qh7+ Kg5 f6+ Kg4 f5+ Kg5 Kg7
g4 Qh6+ Kxf5 Qg6#;
I have not yet looked closer at this one, but it appears that one of us has
got a bug: if your mate in 6 is correct, Chest should have found it.
Otherwise the mate in 6 just is not correct, and you have the bug. :-(
> 6kb/B1p2p2/5r2/1r1p2pR/6q1/3P2P1/P1P2PP1/2KR3Q b - - bm Rb1+; id "ECM.1214";
> 6 0.15 +Mate07 52130 Rb1+ Kxb1 Rb6+ Kc1 Bb2+ Kd2 Bc3+ Kc1 Rb1+ Kxb1 Qb4+
> Kc1 Qb2#
6kb/B1p2p2/5r2/1r1p2pR/6q1/3P2P1/P1P2PP1/2KR3Q b - - acn 83008; acs 2; bm Rb1+;
ce 32754; dm 7; id "ECM.1214"; pv Rb1+ Kxb1 Rb6+ Kc1 Bb2+ Kd2 Bc3+ Kc1 Rb1+ Kxb1
Qb4+ Kc1 Qb2#;
Perfect.
> r1b2r2/3pNpkp/3pn1p1/2pN3P/2PnP3/q3QP2/4BKP1/1R5R w - - bm Qh6+; id "ECM.1224";
> 8 3.76 +Mate11 2041772 Qh6+ Kxh6 hxg6+ Kg5 Rh5+ Kxh5 f4+ Qf3+ Bxf3+ Nxf3
> Rh1+ Nh2 Nf6+ Kh6 Rxh2+ Kg7 Ne8+ Rxe8 Rxh7+ Kf6
> Rxf7# {ht}
I would need to do this one extra with depth=11. Haven't done that (yet).
> r2qnr2/pp3kbQ/2npb1p1/2pN1pP1/4P3/8/PPP1BP2/R1B1K1NR w KQ - bm Qxg6+; id
>"ECM.1232";
> 4 0.07 +Mate07 11174 Qxg6+ Kxg6 Bh5+ Kh7 Bf7+ Bh6 g6+ Kg7 Bxh6+ Kh8
> Bxf8+ Qh4 Rxh4# {ht}
r2qnr2/pp3kbQ/2npb1p1/2pN1pP1/4P3/8/PPP1BP2/R1B1K1NR w KQ - acn 3082714; acs 54;
bm Qxg6+; ce 32754; dm 7; id "ECM.1232"; pv Qxg6+ Kxg6 Bh5+ Kh7 Bf7+ Bh6 g6+ Kg7
Bxh6+ Kh8 Bg5+ Kg7 Rh7#;
We agree.
> 1rr3k1/4ppb1/2q1bnp1/1p2B1Q1/6P1/2p2P2/2P1B2R/2K4R w - - bm Qh6; id "ECM.1267";
> 8 0.80 +Mate07 507774 Qh6 Bxh6+ Rxh6 g5 Rh8+ Kg7 R1h7+ Kg6 Bd3+ Qe4 Bxe4+
> Nxe4 Rg7# {ht}
1rr3k1/4ppb1/2q1bnp1/1p2B1Q1/6P1/2p2P2/2P1B2R/2K4R w - - acn 338741; acs 6; bm
Qh6; ce 32754; dm 7; id "ECM.1267"; pv Qh6 Bxh6+ Rxh6 g5 Rh8+ Kg7 R1h7+ Kg6 Bd3+
Qe4 Bxe4+ Bf5 gxf5#;
We agree.
> r1b2r1R/1p2bpk1/4p1p1/4P1N1/p2p4/5Q2/qPP2PP1/1NKR4 w - - bm Qf6+; id
>"ECM.1280";
> 9 1.29 +Mate08 915265 Qf6+ Bxf6 Rh7+ Kg8 exf6 Qxb2+ Kxb2 a3+ Nxa3 e5 Rg7+
> Kh8 Rh1+ Bh3 Rxh3# {ht}
Not yet done with depth=8
> r3q2r/2p1k1p1/p5p1/1p2Nb2/1P2nB2/P7/2PNQbPP/R2R3K b - - bm Rxh2+; id
>"ECM.1387";
> 4 0.01 +Mate06 5901 Rxh2+ Bxh2 Ng3+ Bxg3 Qh8+ Bh2 Qxh2+ Kxh2 Rh8+ Qh5
> Rxh5# {ht}
r3q2r/2p1k1p1/p5p1/1p2Nb2/1P2nB2/P7/2PNQbPP/R2R3K b - - acn 111735; acs 1; bm
Rxh2+; ce 32756; dm 6; id "ECM.1387"; pv Rxh2+ Bxh2 Ng3+ Bxg3 Qh8+ Bh2 Qxh2+
Kxh2 Rh8+ Qh5 Rxh5#;
Perfectly equal.
> 2r1qrk1/3n3p/b3pPp1/4P3/1pp1nBN1/pP4PQ/P1P2PK1/3RR3 w - - bm Qxh7+; id
>"ECM.1607";
> 4 0.04 +Mate08 6357 Qxh7+ Kxh7 Rh1+ Kg8 Nh6+ Kh7 Nf7+ Kg8 Rh8+ Kxf7
> Rh7+ Kg8 Rg7+ Kh8 Rh1#
Not yet done with depth=8
>Cheers, Tim.
Summarizing: we have one disagreement, which implies a bug.
I will inspect that later, and tell you, why Chest thinks that your
mate-in-6-PV is not correct.
BTW, on my K7/600 with 350 MB hash Chest needed for depth=7 nearly 8 hours.
That is an average of 141 seconds.
Cheers,
Heiner
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