Author: Robert Hyatt
Date: 20:19:51 12/08/03
Go up one level in this thread
On December 08, 2003 at 19:53:36, Jeremiah Penery wrote: >On December 08, 2003 at 19:12:34, Steven Edwards wrote: > >>On December 08, 2003 at 18:30:57, Steven Edwards wrote: >> >>>I've been testing Symbolic's low level search on the BWTC test suite. Althouh >>>the program can solve almost all of the 1,001 positions in a few seconds or less >>>each, there are a few holdouts. >> >>Here's BWTC.0570 (key move Rd1+): >> >>[D]1k1r4/1bp2p2/1p6/2r1PB1p/PQ4pP/6B1/5PP1/6K1 b - - >> >>[SI] [01] (1... Ba6) Score: -2.330 >>[SI] [02] (1... Ba6 2. Kh2) Score: -2.330 >>[SI] [03] (1... Ba6 2. Kh2 Rc4) Score: -2.330 >>[SI] [04] (1... Ba6 2. Kh2 Rc4 3. Qb3) Score: -2.330 >>[SI] [05] (1... Ba6 2. Kh2 Rc4 3. Qb3 Ka7) Score: -2.330 >>[SI] [06] (1... Ba6 2. Kh2 Rc4 3. Qb3 Ka7 4. f4) Score: -2.330 >>[SI] [07] (1... Ba6 2. Kh2 Rc4 3. Qb3 Rdd4) Score: -2.330 >>[SI] [08] (1... Ba6 2. Kh2 Ka7) Score: -2.330 >>[SI] [09] (1... Ba6 2. Kh2 Ka7 3. f4 Rd1) Score: -2.330 >>[SI] [09] (1... Rc1+) Score: -1.330 >>[SI] [09] (1... Rc1+ 2. Kh2 Rdd1 3. Qf8+ Ka7 4. Qa8+ Bxa8 5. Bf4 Rc4 6. Kg3 Rxa4 >>7. Bc8) Score: +7.670 >>[SI] [10] (1... Rc1+) Score: +8.670 >>[SI] [10] (1... Rc1+ 2. Kh2 Rdd1 3. Qf8+ Ka7 4. Qa8+ Bxa8 5. Bf4 Rh1+ 6. Kg3 >>Rh3+ 7. gxh3 Rg1+ 8. Kh2 Rh1+ 9. Kg3 Rxh3#) Score: MateIn9 >> >>Does anyone else get this? Is there a faster mate? > > >Crafty gives: > >6 0.29 ++ 1. ... Rd1+!! >6-> 0.31 2.30 1. ... Rd1+ >7 0.32 ++ 1. ... Rd1+!! >7 0.33 -Mat09 1. ... Rd1+ 2. Kh2 Rcc1 3. Qf8+ Ka7 > 4. Qb8+ Kxb8 5. Bf4 Rh1+ 6. Kg3 Rh3+ > 7. gxh3 Rg1+ 8. Kh2 Rh1+ 9. Kg3 Rxh3# >7-> 0.34 -Mat09 1. ... Rd1+ 2. Kh2 Rcc1 3. Qf8+ Ka7 > 4. Qb8+ Kxb8 5. Bf4 Rh1+ 6. Kg3 Rh3+ > 7. gxh3 Rg1+ 8. Kh2 Rh1+ 9. Kg3 Rxh3# >8 0.35 -Mat09 1. ... Rd1+ 2. Kh2 Rcc1 3. Qf8+ Ka7 > 4. Qb8+ Kxb8 5. Bf4 Rh1+ 6. Kg3 Rh3+ > 7. gxh3 Rg1+ 8. Kh2 Rh1+ 9. Kg3 Rxh3# They are the _same_ solution if you look at the first two black moves. Both rooks come down, one with check, one without....
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