Author: Michel Langeveld
Date: 14:27:58 11/13/01
Go up one level in this thread
On November 13, 2001 at 16:59:43, Gian-Carlo Pascutto wrote: >On November 13, 2001 at 16:43:11, Michel Langeveld wrote: > >>On November 13, 2001 at 15:18:12, Slater Wold wrote: >> >>>On November 13, 2001 at 13:18:55, Robert Hyatt wrote: >>> >>>>On November 13, 2001 at 12:00:47, Michel Langeveld wrote: >>>> >>>>>How long does your program need to see that Nxf1 is deadly lost: >>>>> >>>>>[D] 2r3k1/1b3p2/p4q2/2bp1NpQ/Pr6/3BP2P/3n1PPB/1R3RK1 b - - 0 30 >>>> >>>> >>>>Should take crafty this long: >>>> >>>> 9 13.25 -1.53 1. ... Nxf1 2. Rxb4 Bxb4 3. Be5 Ng3 >>>> 4. Nh6+ Kf8 5. Bxg3 Rc1+ <HT> >>>> 9-> 14.45 -1.53 1. ... Nxf1 2. Rxb4 Bxb4 3. Be5 Ng3 >>>> 4. Nh6+ Kf8 5. Bxg3 Rc1+ <HT> >>>> 10 16.55 -- 1. ... Nxf1 >>>> 10 37.19 -0.47 1. ... Nxf1 2. Be5 Rxb1 3. Bxb1 Ng3 >>>> 4. fxg3 Bxe3+ 5. Kh2 Bg1+ 6. Kxg1 Qxe5 >>>> 7. Ne7+ Kg7 8. Nxc8 Bxc8 >>>> 10-> 43.73 -0.47 1. ... Nxf1 2. Be5 Rxb1 3. Bxb1 Ng3 >>>> 4. fxg3 Bxe3+ 5. Kh2 Bg1+ 6. Kxg1 Qxe5 >>>> 7. Ne7+ Kg7 8. Nxc8 Bxc8 >>>> 11 44.67 -- 1. ... Nxf1 >>>> 11 57.23 3.07 1. ... Nxf1 2. Be5 Rxb1 3. Bxb1 Ng3 >>>> 4. fxg3 Bxe3+ 5. Kh2 Rc1 6. Ne7+ Kf8 >>>> 7. Ng6+ fxg6 8. Qh6+ Ke7 9. Bxf6+ Kxf6 >>>> 10. Bxg6 >>>> > >Some more: > >Black(1): puzzling over a move to ponder. > clearing hash tables > nss depth time score variation (1) > 5-> 0.17 -0.70 1. ... Nxb1 2. Nh6+ Kg7 3. Nf5+ Kf8 > 4. Rxb1 Rxb1+ 5. Bxb1 Kg8 > 6 0.26 -- 1. ... Nxb1 > 6 0.29 1.96 1. ... Nxb1 2. Be5 Rh4 3. Qxh4 gxh4 > 4. Bxf6 > 6 0.50 -0.36 1. ... Rxb1 2. Rxb1 Nxb1 3. Nh6+ Kf8 > 4. Bxb1 Bb4 5. Bd3 Rc1+ 6. Bf1 <HT> > 6-> 0.67 -0.36 1. ... Rxb1 2. Rxb1 Nxb1 3. Nh6+ Kf8 > 4. Bxb1 Bb4 5. Bd3 Rc1+ 6. Bf1 <HT> > 7 0.77 -- 1. ... Rxb1 > 7 1.04 2.38 1. ... Rxb1 2. Rxb1 Nxb1 3. Be5 Bd4 > 4. Bxf6 Rc1+ 5. Kh2 Bxf6 > 7 1.49 1.63 1. ... Nxb1 2. Be5 Rh4 3. Nxh4 Qxe5 > 4. Bh7+ Kf8 5. Rxb1 > 7 2.02 -0.28 1. ... Nxf1 2. Rxf1 Rxa4 3. Nh6+ Kf8 > 4. Be5 Qe7 5. Qd1 > 7-> 2.33 -0.28 1. ... Nxf1 2. Rxf1 Rxa4 3. Nh6+ Kf8 > 4. Be5 Qe7 5. Qd1 > 8 3.70 -0.13 1. ... Nxf1 2. Be5 Ng3 3. Nh6+ Kf8 > 4. Bxg3 Rxb1+ 5. Bxb1 Rc6 6. Ng4 Qe7 > 8-> 4.80 -0.13 1. ... Nxf1 2. Be5 Ng3 3. Nh6+ Kf8 > 4. Bxg3 Rxb1+ 5. Bxb1 Rc6 6. Ng4 Qe7 > 9 5.29 -- 1. ... Nxf1 > 9 7.84 0.07 1. ... Nxf1 2. Rxb4 Bxb4 3. Be5 Ng3 > 4. Nh6+ Kf8 5. Bxg3 Rc1+ 6. Kh2 Kg7 > 7. Ng4 <HT> > 9-> 10.69 0.07 1. ... Nxf1 2. Rxb4 Bxb4 3. Be5 Ng3 > 4. Nh6+ Kf8 5. Bxg3 Rc1+ 6. Kh2 Kg7 > 7. Ng4 <HT> > 10 14.63 0.20 1. ... Nxf1 2. Rxb4 Bxb4 3. Be5 Rc1 > 4. Nh6+ Kf8 5. Bxf1 Qg6 6. Qg4 Qb1 > 7. Qe2 > 10-> 21.48 0.20 1. ... Nxf1 2. Rxb4 Bxb4 3. Be5 Rc1 > 4. Nh6+ Kf8 5. Bxf1 Qg6 6. Qg4 Qb1 > 7. Qe2 > 11 48.54 0.07 1. ... Nxf1 2. Rxf1 Kf8 3. f4 g4 4. > Qxg4 Re8 5. Qe2 Rb2 6. Qf3 Kg8 > 11-> 1:01 0.07 1. ... Nxf1 2. Rxf1 Kf8 3. f4 g4 4. > Qxg4 Re8 5. Qe2 Rb2 6. Qf3 Kg8 > 12 1:56 -- 1. ... Nxf1 > > 12 3:09 5.43 1. ... Nxf1 2. Be5 Rxb1 3. Bxb1 Ng3 > 4. fxg3 Bxe3+ 5. Kf1 a5 6. Bxf6 Ba6+ > 7. Ke1 Rc1+ 8. Qd1 Bf2+ 9. Kd2 Rxd1+ > 10. Kxd1 Bf1 11. Bxg5 Bxg2 > 12 5:41 3.79 1. ... Rxb1 2. Rxb1 Bf8 3. Ng3 Bd6 > 4. Rxb7 Rc1+ 5. Nf1 Rxf1+ 6. Bxf1 Bxh2+ > 7. Kxh2 Nxf1+ 8. Kg1 Nd2 9. Rb8+ Kg7 > 10. Qh8+ Kg6 11. Qxf6+ Kxf6 12. Ra8 > Ke5 13. Rxa6 > 12 8:30 2.22 1. ... Rc6 2. Rxb4 Bxb4 3. Rd1 Bc8 > 4. Nd4 Rc5 5. Qh7+ Kf8 6. h4 Ne4 7. > Bxe4 dxe4 8. hxg5 Bf5 9. Nxf5 Qxf5 > 12 9:53 2.16 1. ... Kf8 2. Rxb4 Bxb4 3. Rd1 Nc4 > 4. f4 g4 5. Bg3 gxh3 6. Bh4 Qc3 7. > Qh6+ Kg8 8. Qg5+ Kh8 9. gxh3 > 12-> 11:24 2.16 1. ... Kf8 2. Rxb4 Bxb4 3. Rd1 Nc4 > 4. f4 g4 5. Bg3 gxh3 6. Bh4 Qc3 7. > Qh6+ Kg8 8. Qg5+ Kh8 9. gxh3 > 13 12:42 2.51 1. ... Kf8 2. Rxb4 Bxb4 3. Rd1 a5 4. > Nh6 Re8 5. Rxd2 Bxd2 6. Bd6+ Re7 7. > Nxf7 Bxe3 8. fxe3 Qxf7 9. Qxg5 > 13-> 20:41 2.51 1. ... Kf8 2. Rxb4 Bxb4 3. Rd1 a5 4. > Nh6 Re8 5. Rxd2 Bxd2 6. Bd6+ Re7 7. > Nxf7 Bxe3 8. fxe3 Qxf7 9. Qxg5 > 14 26:39 2.56 1. ... Kf8 2. Rxb4 Bxb4 3. Rd1 Nc4 > 4. f4 g4 5. hxg4 Nb2 6. g5 Qc3 7. g6 > fxg6 8. Qh6+ Kf7 9. Qh7+ Kf8 > 14-> 41:44 2.56 1. ... Kf8 2. Rxb4 Bxb4 3. Rd1 Nc4 > 4. f4 g4 5. hxg4 Nb2 6. g5 Qc3 7. g6 > fxg6 8. Qh6+ Kf7 9. Qh7+ Kf8 > 15 61:51 2.66 1. ... Kf8 2. Rxb4 Bxb4 3. Rd1 a5 4. > Nh6 Nc4 5. Ng4 Qg7 6. Bxc4 dxc4 7. > Be5 Qg6 <HT> > 15-> 96:58 2.66 1. ... Kf8 2. Rxb4 Bxb4 3. Rd1 a5 4. > Nh6 Nc4 5. Ng4 Qg7 6. Bxc4 dxc4 7. > Be5 Qg6 <HT> > 16 112:49 -- 1. ... Kf8 > 16 187:18 3.17 1. ... Kf8 2. Rxb4 Bxb4 3. Rd1 Ne4 > 4. Qg4 Be7 5. Nxe7 Kxe7 6. Bxe4 Rc4 > 7. Qg3 dxe4 8. Qb8 Bd5 9. Be5 Qe6 10. > a5 >-- >GCP Thanks Gian-Carlo!! So it seems to be that even Kf8 is lost...
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