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Subject: Re: mate -in -9

Author: leonid

Date: 05:04:04 08/25/03

Go up one level in this thread

On August 24, 2003 at 20:00:44, Mike Byrne wrote:

> afew years ago this probelm was considered non-trivial mate-in-9 ..I believe
>most program will save this rapidly ...
>
>Crafty v19.4 (2 cpus)
>
>White(1): kra fischer (using the new "fischer"  personality)
>  queen value..........................900
>  rook value...........................500
>  bishop value.........................300
>  knight value.........................300
>  pawn value...........................100
>
>
>
>
>White(1): [d]3Q4/5q1k/4ppp1/2Kp1N1B/RR6/3P1r2/4nP1b/3b4 w - -
>White(1): st 99999
>search time set to 99999.00.
>White(1): go
>              clearing hash tables
>              time surplus   0.00  time limit 1666:39 (1666:39) [easy move]
>              depth   time  score   variation (1)
>starting thread 1
>                1     0.00   0.04   1. Bxf3 gxf5
>                1->   0.00   0.04   1. Bxf3 gxf5
>                2     0.00   0.04   1. Bxf3 gxf5
>                2->   0.01   0.04   1. Bxf3 gxf5
>                3     0.01     ++   1. Bxf3!!
>                3     0.01   3.41   1. Bxf3 g5 2. Qe7
>                3->   0.03   3.41   1. Bxf3 g5 2. Qe7
>                4     0.03     ++   1. Bxf3!!
>                4     0.03   4.45   1. Bxf3 g5 2. Qe7 Qxe7+ 3. Nxe7 Be5
>                4->   0.04   4.45   1. Bxf3 g5 2. Qe7 Qxe7+ 3. Nxe7 Be5
>                                    (s=3)
>                5     0.06   4.53   1. Bxf3 d4 2. Qe7 Qxe7+ 3. Nxe7 Bxa4
>                                    4. Rxa4 (s=2)
>                5->   0.11   4.53   1. Bxf3 d4 2. Qe7 Qxe7+ 3. Nxe7 Bxa4
>                                    4. Rxa4 (s=4)
>                6     0.12     ++   1. Bxf3!!
>                6     0.14   5.04   1. Bxf3 d4 2. Qe7 Qxe7+ 3. Nxe7 Bxa4
>                                    4. Bxe2 Bc2 5. Kxd4 (s=3)
>                6->   0.29   5.04   1. Bxf3 d4 2. Qe7 Qxe7+ 3. Nxe7 Bxa4
>                                    4. Bxe2 Bc2 5. Kxd4 (s=8)
>                7     0.40     ++   1. Bxf3!!
>                7     0.54   6.06   1. Bxf3 Nf4 2. Rxf4 Bxf4 3. Bxd1 e5
>                                    4. Nd6 (s=7)
>                7     1.06  Mat09   1. Rb7 Qxb7 2. Bxg6+ Kxg6 3. Qg8+ Kxf5
>                                    4. Qg4+ Ke5 5. Qh5+ Rf5 6. f4+ Bxf4
>                                    7. Qxe2+ Bxe2 8. Re4+ dxe4 9. d4# (s=5)
>                7->   1.20  Mat09   1. Rb7 Qxb7 2. Bxg6+ Kxg6 3. Qg8+ Kxf5
>                                    4. Qg4+ Ke5 5. Qh5+ Rf5 6. f4+ Bxf4
>                                    7. Qxe2+ Bxe2 8. Re4+ dxe4 9. d4# (s=3)
>                8     1.42  Mat09   1. Rb7 Qxb7 2. Bxg6+ Kxg6 3. Qg8+ Kxf5
>                                    4. Qg4+ Ke5 5. Qh5+ Rf5 6. f4+ Bxf4
>                                    7. Qxe2+ Bxe2 8. Re4+ dxe4 9. d4# (s=2)
>                8->   7.50  Mat09   1. Rb7 Qxb7 2. Bxg6+ Kxg6 3. Qg8+ Kxf5
>                                    4. Qg4+ Ke5 5. Qh5+ Rf5 6. f4+ Bxf4
>                                    7. Qxe2+ Bxe2 8. Re4+ dxe4 9. d4# (s=5)
>                9     8.21  Mat09   1. Rb7 Qxb7 2. Bxg6+ Kxg6 3. Qg8+ Kxf5
>                                    4. Qg4+ Ke5 5. Qh5+ Rf5 6. f4+ Bxf4
>                                    7. Qxe2+ Bxe2 8. Re4+ dxe4 9. d4# (s=4)
>                9->   9.90  Mat09   1. Rb7 Qxb7 2. Bxg6+ Kxg6 3. Qg8+ Kxf5
>                                    4. Qg4+ Ke5 5. Qh5+ Rf5 6. f4+ Bxf4
>                                    7. Qxe2+ Bxe2 8. Re4+ dxe4 9. d4# (s=3)
>               10    11.78  Mat09   1. Rb7 Qxb7 2. Bxg6+ Kxg6 3. Qg8+ Kxf5
>                                    4. Qg4+ Ke5 5. Qh5+ Rf5 6. f4+ Bxf4
>                                    7. Qxe2+ Bxe2 8. Re4+ dxe4 9. d4# (s=2)
>?              10    11.78   2/50*  1. Bxf3
>White(1): ?
>              time=14.12  cpu=175%  mat=0  n=17988031  fh=96%  nps=1273k
>              ext-> chk=1362213 cap=17833 pp=57280 1rep=182010 mate=13687
>              predicted=0  nodes=17988031  evals=127506
>              endgame tablebase-> probes=0  hits=0
>              SMP->  split=632  stop=52  data=8/64  cpu=24.84  elap=14.12
>
>mate in 9 moves.
>
>
>White(1): Rb7
>              time used:  14.12
>Black(1):


LLchess mate solver. Selective search. On Pentium 600Mhz. No hash. Mate in 9
moves found in 0.33 second.

Leonid.

• Re: mate -in -9 (to Leonid) F. Huber 09:47:31 08/25/03
  • Re: mate -in -9 (to Leonid) leonid 11:21:03 08/25/03
    • Re: mate -in -9 (to Leonid) F. Huber 12:40:40 08/25/03
      • Re: to Leonid - problem found F. Huber 14:57:54 08/25/03
        • Re: to Leonid - problem found leonid 15:46:23 08/25/03
      • Re: mate -in -9 (to Leonid) leonid 14:53:28 08/25/03
        • Re: mate -in -9 (to Leonid) F. Huber 15:02:57 08/25/03
• Mate slightly harder leonid 06:49:46 08/25/03
  • Re: Mate slightly harder Mike Byrne 14:33:49 08/25/03
  • Re: Mate slightly harder Vincent Lejeune 10:29:53 08/25/03
  • Re: Mate slightly harder Dan Andersson 10:29:16 08/25/03
  • Re: Mate slightly harder Tim Foden 10:10:40 08/25/03
    • Re: Mate slightly harder leonid 11:33:47 08/25/03
  • Re: Mate slightly harder Manfred Rosenboom 10:07:45 08/25/03
  • Re: Mate slightly harder Tord Romstad 09:16:45 08/25/03
  • Re: Mate slightly harder Uri Blass 08:57:09 08/25/03

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