Author: Mike Byrne
Date: 21:14:33 07/15/02
Go up one level in this thread
I did some fine tuning of the discovery I made last night in this concept of
"booster extensions" - this version of Crafty "sees' many difficult problems
very fast and without unduly exploding the tree with meaningless less extensions
the standard Crafty "bench mark" is just around 60M nodes (type "bench" at the
command prompt) -- I have received your emails - but I will not be able to see
this version out until tommorrow - attached are a short set of problems so that
you can compare to your crafty . This "test" position especially please me - try
it on your program
[D]2k5/215/3pr2p/5Qp1/8/6P1/3pqP1P/R5K1 w - - bm Ra8 id "CCC"
Mate in 13 - modified crafty sees the mate in 98 seconds on my dual 1.7 Ghz Xeon
On July 15, 2002 at 06:04:11, Mike Byrne wrote:
>
>This is Bob Hyatt's Crafty 17.14 (which is a super fast searcher), compiled
>with MSVC 6 with the Intel plug in with some of my pet changes:
>
>They include :
>
>modified time.c - a more aggressive use of time up front in all type of games -
>blitz, tournament and increment
>
>tweaked extensions - but not elaborate - check out the "bench"
>
>standard 17.14 evaluation code - no changes here
>
>
>this version is very good - some results:
>
>Crafty v17.14 (1 cpus)
>
>White(1): bench
>Running benchmark. . .
>Total nodes: 59824696
>Raw nodes per second: 672187
>Total elapsed time: 89
>SMP time-to-ply measurement: 7.191011
>
>
>White(1): test d:\crafty\positions\ccc.epd 2
>======================================================================
>! WAC100 !
>======================================================================
>[D]8/k1b5/P4p2/1Pp2p1p/K1P2P1P/8/3B4/8 w - - bm b6+; id "WAC100";
>
>solution 1. b6+
>end-game phase
> time surplus 0.00 time limit 5:00 (5:00)
> nss depth time score variation (1)
> 11 0.11 3.37 1. Kb3 Bd6 2. Be3 Kb6 3. Kc3 Bb8 4.
> Kd2 Bd6 5. Kd3 <HT>
> 11-> 0.13 3.37 1. Kb3 Bd6 2. Be3 Kb6 3. Kc3 Bb8 4.
> Kd2 Bd6 5. Kd3 <HT>
> 12 0.20 3.28 1. Kb3 Bd6 2. Kc3 Bc7 3. Kd3 Bb6 4.
> Ke2 Bd8 5. Bc3 Bc7 6. Bxf6 Bxf4
> 12-> 0.30 3.28 1. Kb3 Bd6 2. Kc3 Bc7 3. Kd3 Bb6 4.
> Ke2 Bd8 5. Bc3 Bc7 6. Bxf6 Bxf4
> 13 0.38 3.52 1. Kb3 Bd6 2. Kc3 Bc7 3. Kd3 Bb6 4.
> Bc3 Bc7 5. Ke3 Bd8 6. Kd2 Kb6 7. Ke3
> 13-> 0.47 3.52 1. Kb3 Bd6 2. Kc3 Bc7 3. Kd3 Bb6 4.
> Bc3 Bc7 5. Ke3 Bd8 6. Kd2 Kb6 7. Ke3
> 14 0.69 3.47 1. Kb3 Bd6 2. Kc3 Bc7 3. Kd3 Bb6 4.
> Bc3 Bc7 5. Ke3 Bd8 6. Ke2 <HT>
> (2) 14-> 1.05 3.47 1. Kb3 Bd6 2. Kc3 Bc7 3. Kd3 Bb6 4.
> Bc3 Bc7 5. Ke3 Bd8 6. Ke2 <HT>
> 15 1.31 3.47 1. Kb3 Bd6 2. Kc3 Bc7 3. Kd3 Bb6 4.
> Bc3 Bd8 5. Ke3 Ka8 6. Kd2 Ka7 7. Ke2
> Be7 8. Ba5 <HT>
> (2) 15-> 1.78 3.47 1. Kb3 Bd6 2. Kc3 Bc7 3. Kd3 Bb6 4.
> Bc3 Bd8 5. Ke3 Ka8 6. Kd2 Ka7 7. Ke2
> Be7 8. Ba5 <HT>
> 16 2.49 3.47 1. Kb3 Bd6 2. Kc3 Bc7 3. Kd3 Bb6 4.
> Bc3 Bd8 5. Ke3 Ka8 6. Kd2 Ka7 7. Ke2
> Be7 8. Ba5 <HT>
> 16 3.50 3.82 1. b6+ Bxb6 2. Kb5 Bc7 3. Be3 Kb8 4.
> Kxc5 Ba5 5. Kd6 Ka8 6. Ke7 Be1 7. Kxf6
> Bxh4+ 8. Kxf5 Bg3 9. a7 h4 10. Ke6
> (4) 16-> 3.94 3.82 1. b6+ Bxb6 2. Kb5 Bc7 3. Be3 Kb8 4.
> Kxc5 Ba5 5. Kd6 Ka8 6. Ke7 Be1 7. Kxf6
> Bxh4+ 8. Kxf5 Bg3 9. a7 h4 10. Ke6
> (3) 17 4.56 3.90 1. b6+ Bxb6 2. Kb5 Bc7 3. Be3 Bb8 4.
> Bxc5+ Ka8 5. Be3 Bd6 6. c5 Bc7 7. c6
> Kb8 8. Kc4 Ka8 9. Kd5 Kb8 10. a7+ Ka8
> 11. Ke6
> (4) 17-> 7.42 3.90 1. b6+ Bxb6 2. Kb5 Bc7 3. Be3 Bb8 4.
> Bxc5+ Ka8 5. Be3 Bd6 6. c5 Bc7 7. c6
> Kb8 8. Kc4 Ka8 9. Kd5 Kb8 10. a7+ Ka8
> 11. Ke6
> 18 7.64 ++ 1. b6+!!
> 18-> 1:26 4.29 1. b6+ Bxb6 2. Kb5 Bc7 3. Be3 Bb8 4.
> Bxc5+ Ka8 5. Be3 Bd6 6. c5 Bc7 7. c6
> Kb8 8. Kc4 Ka8 9. Kd5 Kb8 10. a7+ Ka8
> 11. Ke6
> 19 1:29 4.51 1. b6+ Bxb6 2. Kb5 Bc7 3. Be3 Ka8 4.
> Kxc5 Ka7 5. Kc6+ Ka8 6. c5 Bb8 7. Kb5
> Bc7 8. c6 Kb8 9. Bc5 <HT>
> (3) 19-> 1:41 4.51 1. b6+ Bxb6 2. Kb5 Bc7 3. Be3 Ka8 4.
> Kxc5 Ka7 5. Kc6+ Ka8 6. c5 Bb8 7. Kb5
> Bc7 8. c6 Kb8 9. Bc5 <HT>
> time=1:41 cpu=199% mat=1 n=138050137 fh=97% nps=1361709
> ext-> checks=13505902 recaps=48818 pawns=1044210 1rep=712329
>thrt:14672
> predicted=0 nodes=138050137 evals=5173267
> endgame tablebase-> probes done=0 successful=0
> SMP-> split=3210 stop=297 data=10/64 cpu=3:22 elap=1:41
>
>======================================================================
>! WAC105 !
>======================================================================
>[D]r2r2k1/pb3ppp/1p1bp3/7q/3n2nP/PP1B2P1/1B1N1P2/RQ2NRK1 b - - bm Qxh4; id
>"WAC105";
>
>solution 1. Qxh4
> time surplus 0.00 time limit 5:00 (5:00)
> nss depth time score variation (1)
> 5 0.19 ++ 1. ... Bxg3!!
> 5 0.27 3.64 1. ... Bxg3 2. Be4 Ne2+ 3. Kg2 Rxd2
> 4. fxg3 Bxe4+ 5. Qxe4
> 5-> 0.27 3.64 1. ... Bxg3 2. Be4 Ne2+ 3. Kg2 Rxd2
> 4. fxg3 Bxe4+ 5. Qxe4
> 6 0.36 ++ 1. ... Bxg3!!
> 6 0.48 5.05 1. ... Bxg3 2. Be4 Bxe4 3. Nxe4 Bh2+
> 4. Kg2 Nxb3 5. Bf6 Nxa1 6. Bxd8 Rxd8
> 7. Qxa1
> 6 0.61 ++ 1. ... Qxh4!!
> 6 0.64 9.11 1. ... Qxh4 2. Nef3 Nxf3+ 3. Nxf3 Bxf3
> 4. Bxh7+ Qxh7 5. Qxh7+ Kxh7 6. Rac1
> (3) 6-> 0.64 9.11 1. ... Qxh4 2. Nef3 Nxf3+ 3. Nxf3 Bxf3
> 4. Bxh7+ Qxh7 5. Qxh7+ Kxh7 6. Rac1
> (2) 7 0.75 9.34 1. ... Qxh4 2. Nef3 Nxf3+ 3. Nxf3 Bxf3
> 4. Bxh7+ Qxh7 5. Qxh7+ Kxh7 6. Rac1
> e5
> 7-> 0.83 9.34 1. ... Qxh4 2. Nef3 Nxf3+ 3. Nxf3 Bxf3
> 4. Bxh7+ Qxh7 5. Qxh7+ Kxh7 6. Rac1
> e5
> 8 0.94 ++ 1. ... Qxh4!!
> 8 1.67 15.06 1. ... Qxh4 2. Nef3 Nxf3+ 3. Nxf3 Bxf3
> 4. Bxh7+ Kh8 5. Bxg7+ Kxg7 6. Qb2+
> f6 7. Qxf6+ Qxf6 8. Bd3
> (2) 8-> 3.28 15.06 1. ... Qxh4 2. Nef3 Nxf3+ 3. Nxf3 Bxf3
> 4. Bxh7+ Kh8 5. Bxg7+ Kxg7 6. Qb2+
> f6 7. Qxf6+ Qxf6 8. Bd3
> 9 3.48 ++ 1. ... Qxh4!!
> 9 6.14 Mat06 1. ... Qxh4 2. Nef3 Nxf3+ 3. Nxf3 Bxf3
> 4. Bxh7+ Kf8 5. Bxg7+ Ke8 6. gxh4 Bh2#
> 9-> 6.63 Mat06 1. ... Qxh4 2. Nef3 Nxf3+ 3. Nxf3 Bxf3
> 4. Bxh7+ Kf8 5. Bxg7+ Ke8 6. gxh4 Bh2#
> time=6.63 cpu=198% mat=1 n=7870828 fh=93% nps=1187153
> ext-> checks=449279 recaps=54630 pawns=5 1rep=51428 thrt:5306
> predicted=0 nodes=7870828 evals=615750
> endgame tablebase-> probes done=0 successful=0
> SMP-> split=198 stop=31 data=6/64 cpu=13.13 elap=6.63
>======================================================================
>! WAC141 !
>======================================================================
>[D]4r1k1/p1qr1p2/2pb1Bp1/1p5p/3P1n1R/1B3P2/PP3PK1/2Q4R w - - bm Qxf4; id
>"WAC141";
>
>solution 1. Qxf4
> time surplus 0.00 time limit 5:00 (5:00)
> nss depth time score variation (1)
> 7 0.18 ++ 1. Kf1!!
> 7-> 0.37 -2.13 1. Kf1 Re2 2. Bc2 c5 3. d5 Kf8
> 8 0.98 ++ 1. Kf1!!
> 8-> 1.14 -1.74 1. Kf1 Re2 2. Bc2 c5 3. d5 Kf8
> 9 3.17 -1.75 1. Kf1 Kh7 2. Qc2 Kh6 3. Rg4 a5 4.
> Rhh4 Re2 5. Qc3
> 9 3.56 ++ 1. Qxf4!!
> 9 13.00 Mat06 1. Qxf4 Bxf4 2. Rxh5 gxh5 3. Rxh5 Bh6
> 4. Rxh6 Qg3+ 5. Kxg3 Kf8 6. Rh8#
> 9-> 13.01 Mat06 1. Qxf4 Bxf4 2. Rxh5 gxh5 3. Rxh5 Bh6
> 4. Rxh6 Qg3+ 5. Kxg3 Kf8 6. Rh8#
> 10 14.92 Mat06 1. Qxf4 Bxf4 2. Rxh5 gxh5 3. Rxh5 Bh6
> 4. Rxh6 Qg3+ 5. Kxg3 Kf8 6. Rh8#
> 10-> 15.00 Mat06 1. Qxf4 Bxf4 2. Rxh5 gxh5 3. Rxh5 Bh6
> 4. Rxh6 Qg3+ 5. Kxg3 Kf8 6. Rh8#
> time=15.00 cpu=199% mat=-1 n=20771202 fh=92% nps=1384746
> ext-> checks=1809073 recaps=72249 pawns=2460 1rep=185082
>thrt:115810
> predicted=0 nodes=20771202 evals=1018265
> endgame tablebase-> probes done=0 successful=0
> SMP-> split=215 stop=34 data=6/64 cpu=29.92 elap=15.00
>======================================================================
>! CCC !
>======================================================================
>[D]2k5/215/3pr2p/5Qp1/8/6P1/3pqP1P/R5K1 w - - bm Ra8 id "CCC"
>
>solution 1. Ra8+
>end-game phase
> time surplus 0.00 time limit 5:00 (5:00)
> nss depth time score variation (1)
> (2) 6 0.09 -0.34 1. Qc2+ Kd8 2. Ra8+ Ke7 3. Qh7+ Kf6
> 4. Qxh6+ Kf5 5. Rf8+ Ke5 6. Qxg5+ Kd4
> 6-> 0.11 -0.34 1. Qc2+ Kd8 2. Ra8+ Ke7 3. Qh7+ Kf6
> 4. Qxh6+ Kf5 5. Rf8+ Ke5 6. Qxg5+ Kd4
> 7 0.12 -0.20 1. Qc2+ Kd8 2. Ra8+ Ke7 3. Qh7+ Kf6
> 4. Qxh6+ Kf5 5. Rf8+ Ke5 6. Qxg5+ Kd4
> 7. Qf4+
> (3) 7-> 0.17 -0.20 1. Qc2+ Kd8 2. Ra8+ Ke7 3. Qh7+ Kf6
> 4. Qxh6+ Kf5 5. Rf8+ Ke5 6. Qxg5+ Kd4
> 7. Qf4+
> (2) 8 0.22 -0.21 1. Qc2+ Kd8 2. Ra8+ Ke7 3. Qh7+ Kf6
> 4. Qxh6+ Kf5 5. Rf8+ Ke5 6. Qxg5+ Kd4
> 7. Qf4+ Kc3
> (3) 8-> 0.42 -0.21 1. Qc2+ Kd8 2. Ra8+ Ke7 3. Qh7+ Kf6
> 4. Qxh6+ Kf5 5. Rf8+ Ke5 6. Qxg5+ Kd4
> 7. Qf4+ Kc3
> (2) 9 0.56 -0.24 1. Qc2+ Kd8 2. Ra8+ Ke7 3. Qh7+ Kf6
> 4. Qxh6+ Kf5 5. Rf8+ Ke5 6. Qxg5+ Kd4
> 7. Qf4+ Kd3 8. Qf5+ Re4
> (2) 9-> 0.83 -0.24 1. Qc2+ Kd8 2. Ra8+ Ke7 3. Qh7+ Kf6
> 4. Qxh6+ Kf5 5. Rf8+ Ke5 6. Qxg5+ Kd4
> 7. Qf4+ Kd3 8. Qf5+ Re4
> 10 1.28 -- 1. Qc2+
> 10 1.31 -0.64 1. Qc2+ Kd8 2. Ra8+ Ke7 3. Qh7+ Kf6
> 4. Qxh6+ Kf5 5. Rf8+ Ke5 6. Qxg5+ Kd4
> 7. Rf4+ Kc3 8. Qa5+ Kb2 9. Rb4+ Kc2
> (4) 10-> 2.36 -0.64 1. Qc2+ Kd8 2. Ra8+ Ke7 3. Qh7+ Kf6
> 4. Qxh6+ Kf5 5. Rf8+ Ke5 6. Qxg5+ Kd4
> 7. Rf4+ Kc3 8. Qa5+ Kb2 9. Rb4+ Kc2
> 11 2.40 ++ 1. Qc2+!!
> (3) 11 27.00 0.02 1. Qc2+ Kd8 2. Ra8+ Ke7 3. Qh7+ Kf6
> 4. Qxh6+ Kf5 5. Rf8+ Ke5 6. Qxg5+ Kd4
> 7. Rf4+ Kc3 8. Qa5+ Kc2 9. Qa4+ Kc3
> 10. Rd4
> 11-> 28.34 0.02 1. Qc2+ Kd8 2. Ra8+ Ke7 3. Qh7+ Kf6
> 4. Qxh6+ Kf5 5. Rf8+ Ke5 6. Qxg5+ Kd4
> 7. Rf4+ Kc3 8. Qa5+ Kc2 9. Qa4+ Kc3
> 10. Rd4
> 12 30.69 0.00 1. Qc2+ Kd8 2. Ra8+ Ke7 3. Qh7+ Kf6
> 4. Qxh6+ Kf5 5. Rf8+ Ke5 6. Qxg5+ Kd4
> 7. Rf4+ Kc3 8. Qa5+ Kc2 9. Qa4+ Kc3
> 10. Qa5+
> 12-> 34.11 0.00 1. Qc2+ Kd8 2. Ra8+ Ke7 3. Qh7+ Kf6
> 4. Qxh6+ Kf5 5. Rf8+ Ke5 6. Qxg5+ Kd4
> 7. Rf4+ Kc3 8. Qa5+ Kc2 9. Qa4+ Kc3
> 10. Qa5+
> 13 39.92 0.04 1. Qc2+ Kd8 2. Ra8+ Ke7 3. Qh7+ Kf6
> 4. Qxh6+ Kf5 5. Rf8+ Ke5 6. Qxg5+ Kd4
> 7. Rf4+ Re4 8. Rxe4+ Kxe4 9. f3+ Kd4
> 10. Qg7+ Qe5 11. Qg4+ Kd3 12. f4
> (2) 13-> 50.20 0.04 1. Qc2+ Kd8 2. Ra8+ Ke7 3. Qh7+ Kf6
> 4. Qxh6+ Kf5 5. Rf8+ Ke5 6. Qxg5+ Kd4
> 7. Rf4+ Re4 8. Rxe4+ Kxe4 9. f3+ Kd4
> 10. Qg7+ Qe5 11. Qg4+ Kd3 12. f4
> 14 1:05 0.01 1. Qc2+ Kd8 2. Ra8+ Ke7 3. Qh7+ Kf6
> 4. Qxh6+ Kf5 5. Rf8+ Ke5 6. Qxg5+ Kd4
> 7. Rf4+ Re4 8. Rxe4+ Kxe4 9. Qe7+ Kd3
> 10. Qxd6+ Kc3 11. Qc7+ Qc4 12. Qe5+
> Kc2 13. Qf5+ <HT>
> 14 1:05 ++ 1. Ra8+!!
> 14 2:02 Mat13 1. Ra8+ Kd7 2. Ra7+ Kc6 3. Qc2+ Kd5
> 4. Ra5+ Kd4 5. Qb2+ Kc4 6. Qb5+ Kc3
> 7. Ra3+ Kd4 8. Ra4+ Kc3 9. Qb4+ Kc2
> 10. Ra2+ Kd3 11. Ra3+ Kc2 12. Rc3+
> Kd1 13. Qb1#
> 14-> 2:08 Mat13 1. Ra8+ Kd7 2. Ra7+ Kc6 3. Qc2+ Kd5
> 4. Ra5+ Kd4 5. Qb2+ Kc4 6. Qb5+ Kc3
> 7. Ra3+ Kd4 8. Ra4+ Kc3 9. Qb4+ Kc2
> 10. Ra2+ Kd3 11. Ra3+ Kc2 12. Rc3+
> Kd1 13. Qb1#
>White(1): ?
> time=2:14 cpu=199% mat=-1 n=172094178 fh=97% nps=1278465
> ext-> checks=23523851 recaps=305434 pawns=31545 1rep=1332227
>thrt:104050
> predicted=0 nodes=172094178 evals=8529219
> endgame tablebase-> probes done=0 successful=0
> SMP-> split=2596 stop=227 data=10/64 cpu=4:28 elap=2:14
White(1): mt 2
max threads set to 2
White(1): hash 192M
hash table memory = 192M bytes.
White(1): st 600
search time set to 600.00.
White(1): lea off
book learning disabled
result learning disabled
position learning disabled
White(1): ponder off
pondering disabled.
White(1): test d:\crafty\positions\ccc.epd
======================================================================
! WAC100 !
======================================================================
+---+---+---+---+---+---+---+---+
8 | | | | | | | | |
+---+---+---+---+---+---+---+---+
7 | *K| | *B| | | | | |
+---+---+---+---+---+---+---+---+
6 | P | | | | | *P| | |
+---+---+---+---+---+---+---+---+
5 | | P | *P| | | *P| | *P|
+---+---+---+---+---+---+---+---+
4 | K | | P | | | P | | P |
+---+---+---+---+---+---+---+---+
3 | | | | | | | | |
+---+---+---+---+---+---+---+---+
2 | | | | B | | | | |
+---+---+---+---+---+---+---+---+
1 | | | | | | | | |
+---+---+---+---+---+---+---+---+
a b c d e f g h
solution 1. b6+
end-game phase
time surplus 0.00 time limit 10:00 (10:00)
nss depth time score variation (1)
starting thread 1
11-> 0.11 3.36 1. Kb3 Bb8 2. Kc3 Bd6 3. Kd3 Bc7 4.
Kc2 Bb8 5. Be3 <HT>
12 0.14 3.36 1. Kb3 Bb8 2. Kc3 Bd6 3. Kd3 Bc7 4.
Kc2 Bb8 <HT>
(3) 12-> 0.23 3.36 1. Kb3 Bb8 2. Kc3 Bd6 3. Kd3 Bc7 4.
Kc2 Bb8 <HT>
(2) 13 0.31 3.52 1. Kb3 Bb8 2. Kc3 Bd6 3. Kd3 Bc7 4.
Ke3 Bb6 5. Bc3 Bd8 6. Kd2 Kb6 7. Ke3
(2) 13-> 0.42 3.52 1. Kb3 Bb8 2. Kc3 Bd6 3. Kd3 Bc7 4.
Ke3 Bb6 5. Bc3 Bd8 6. Kd2 Kb6 7. Ke3
14 0.62 3.47 1. Kb3 Bb8 2. Kc3 Bd6 3. Kd3 Bc7 4.
Ke3 Bb6 5. Bc3 Bd8 6. Ke2 <HT>
(2) 14-> 1.03 3.47 1. Kb3 Bb8 2. Kc3 Bd6 3. Kd3 Bc7 4.
Ke3 Bb6 5. Bc3 Bd8 6. Ke2 <HT>
15 1.23 3.47 1. Kb3 Bb8 2. Kc3 Bd6 3. Kd3 Bc7 4.
Ke3 Bb6 5. Bc3 Bd8 6. Ke2 Be7 7. Ba5
Bd6 8. Ke3
(3) 15-> 1.75 3.47 1. Kb3 Bb8 2. Kc3 Bd6 3. Kd3 Bc7 4.
Ke3 Bb6 5. Bc3 Bd8 6. Ke2 Be7 7. Ba5
Bd6 8. Ke3
(2) 16 2.19 3.47 1. Kb3 Bb8 2. Kc3 Bd6 3. Kd3 Bc7 4.
Bc1 Bd6 5. Ke3 Kb6 6. Bb2 Be7 7. Bc3
Ka7 8. Ba5 Bd6
16 3.22 3.86 1. b6+ Bxb6 2. Kb5 Bc7 3. Be3 Kb8 4.
Kxc5 Ba5 5. Kd6 Bb4+ 6. Ke6 Be1 7.
Kxf6 Bxh4+ 8. Kxf5 Bd8 9. a7+ Ka8 10.
Ke5 h4
(4) 16-> 3.50 3.86 1. b6+ Bxb6 2. Kb5 Bc7 3. Be3 Kb8 4.
Kxc5 Ba5 5. Kd6 Bb4+ 6. Ke6 Be1 7.
Kxf6 Bxh4+ 8. Kxf5 Bd8 9. a7+ Ka8 10.
Ke5 h4
(3) 17 3.97 3.90 1. b6+ Bxb6 2. Kb5 Bc7 3. Be3 Bb8 4.
Bxc5+ Ka8 5. Be3 Bd6 6. c5 Bc7 7. c6
Kb8 8. Kc4 Ka8 9. Kd5 Kb8 10. a7+ Ka8
11. Ke6
(4) 17-> 6.78 3.90 1. b6+ Bxb6 2. Kb5 Bc7 3. Be3 Bb8 4.
Bxc5+ Ka8 5. Be3 Bd6 6. c5 Bc7 7. c6
Kb8 8. Kc4 Ka8 9. Kd5 Kb8 10. a7+ Ka8
11. Ke6
18 6.94 ++ 1. b6+!!
(3) 18 57.26 4.66 1. b6+ Bxb6 2. Kb5 Bc7 3. Be3 Ka8 4.
Kxc5 Bd8 5. Kd5 Ba5 6. Ke6 Be1 7. c5
Ba5 8. c6 Bc7 9. Kxf6 Bd8+ 10. Kxf5
Bxh4
18-> 1:03 4.66 1. b6+ Bxb6 2. Kb5 Bc7 3. Be3 Ka8 4.
Kxc5 Bd8 5. Kd5 Ba5 6. Ke6 Be1 7. c5
Ba5 8. c6 Bc7 9. Kxf6 Bd8+ 10. Kxf5
Bxh4
19 1:04 4.96 1. b6+ Bxb6 2. Kb5 Bc7 3. Be3 Ka8 4.
Kxc5 Bd8 5. Kd5 Ba5 6. Ke6 Kb8 7. Kxf6
Bd8+ 8. Kxf5 Bxh4 9. Kg6 Be7 10. a7+
Ka8 11. Kxh5 Bf6
White(1): ?
time=1:07 cpu=430% mat=1 n=97878783 fh=98% nps=1454581
ext-> checks=9437967 recaps=29111 pawns=693320 1rep=432734
thrt:7052
predicted=0 nodes=97878783 evals=3602841
endgame tablebase-> probes done=0 successful=0
SMP-> split=2611 stop=198 data=9/64 cpu=4:49 elap=1:07
----------------------> solution correct (1/1).
======================================================================
! WAC105 !
======================================================================
+---+---+---+---+---+---+---+---+
8 | *R| | | *R| | | *K| |
+---+---+---+---+---+---+---+---+
7 | *P| *B| | | | *P| *P| *P|
+---+---+---+---+---+---+---+---+
6 | | *P| | *B| *P| | | |
+---+---+---+---+---+---+---+---+
5 | | | | | | | | *Q|
+---+---+---+---+---+---+---+---+
4 | | | | *N| | | *N| P |
+---+---+---+---+---+---+---+---+
3 | P | P | | B | | | P | |
+---+---+---+---+---+---+---+---+
2 | | B | | N | | P | | |
+---+---+---+---+---+---+---+---+
1 | R | Q | | | N | R | K | |
+---+---+---+---+---+---+---+---+
a b c d e f g h
solution 1. Qxh4
time surplus 0.00 time limit 10:00 (10:00)
nss depth time score variation (1)
5 0.14 ++ 1. ... Bxg3!!
5 0.19 3.64 1. ... Bxg3 2. Be4 Ne2+ 3. Kg2 Rxd2
4. fxg3 Bxe4+ 5. Qxe4
5-> 0.19 3.64 1. ... Bxg3 2. Be4 Ne2+ 3. Kg2 Rxd2
4. fxg3 Bxe4+ 5. Qxe4
6 0.28 ++ 1. ... Bxg3!!
6 0.41 5.05 1. ... Bxg3 2. Be4 Bxe4 3. Nxe4 Bh2+
4. Kg2 Nxb3 5. Bf6 Nxa1 6. Bxd8 Rxd8
7. Qxa1
6 0.50 ++ 1. ... Qxh4!!
6 0.53 9.11 1. ... Qxh4 2. Ndf3 Nxf3+ 3. Nxf3 Bxf3
4. Bxh7+ Qxh7 5. Qxh7+ Kxh7 6. Rac1
(2) 6-> 0.53 9.11 1. ... Qxh4 2. Ndf3 Nxf3+ 3. Nxf3 Bxf3
4. Bxh7+ Qxh7 5. Qxh7+ Kxh7 6. Rac1
7 0.61 9.34 1. ... Qxh4 2. Ndf3 Nxf3+ 3. Nxf3 Bxf3
4. Bxh7+ Qxh7 5. Qxh7+ Kxh7 6. Rac1
e5
7-> 0.67 9.34 1. ... Qxh4 2. Ndf3 Nxf3+ 3. Nxf3 Bxf3
4. Bxh7+ Qxh7 5. Qxh7+ Kxh7 6. Rac1
e5
8 0.76 ++ 1. ... Qxh4!!
8 1.37 15.06 1. ... Qxh4 2. Ndf3 Nxf3+ 3. Nxf3 Bxf3
4. Bxh7+ Kh8 5. Bxg7+ Kxg7 6. Qb2+
f6 7. Qxf6+ Qxf6 8. Bd3
(2) 8-> 2.78 15.06 1. ... Qxh4 2. Ndf3 Nxf3+ 3. Nxf3 Bxf3
4. Bxh7+ Kh8 5. Bxg7+ Kxg7 6. Qb2+
f6 7. Qxf6+ Qxf6 8. Bd3
9 2.84 ++ 1. ... Qxh4!!
9 5.37 Mat06 1. ... Qxh4 2. Nef3 Nxf3+ 3. Nxf3 Bxf3
4. Bxh7+ Kf8 5. Bxg7+ Ke8 6. gxh4 Bh2#
<HT>
(2) 9-> 9.58 Mat06 1. ... Qxh4 2. Nef3 Nxf3+ 3. Nxf3 Bxf3
4. Bxh7+ Kf8 5. Bxg7+ Ke8 6. gxh4 Bh2#
<HT>
10 10.33 Mat06 1. ... Qxh4 2. Nef3 Nxf3+ 3. Nxf3 Bxf3
4. Bxh7+ Kf8 5. Bxg7+ Ke8 6. gxh4 Bh2#
<HT>
10-> 11.17 Mat06 1. ... Qxh4 2. Nef3 Nxf3+ 3. Nxf3 Bxf3
4. Bxh7+ Kf8 5. Bxg7+ Ke8 6. gxh4 Bh2#
<HT>
11 12.69 Mat06 1. ... Qxh4 2. Nef3 Nxf3+ 3. Nxf3 Bxf3
4. Bxh7+ Kf8 5. Bxg7+ Ke8 6. gxh4 Bh2#
(2) 11-> 16.17 Mat06 1. ... Qxh4 2. Nef3 Nxf3+ 3. Nxf3 Bxf3
4. Bxh7+ Kf8 5. Bxg7+ Ke8 6. gxh4 Bh2#
time=16.17 cpu=198% mat=1 n=21095560 fh=96% nps=1304611
ext-> checks=1226588 recaps=124434 pawns=13 1rep=119794 thrt:13080
predicted=0 nodes=21095560 evals=437466
endgame tablebase-> probes done=0 successful=0
SMP-> split=324 stop=39 data=7/64 cpu=32.16 elap=16.17
----------------------> solution correct (2/2).
======================================================================
! WAC141 !
======================================================================
+---+---+---+---+---+---+---+---+
8 | | | | | *R| | *K| |
+---+---+---+---+---+---+---+---+
7 | *P| | *Q| *R| | *P| | |
+---+---+---+---+---+---+---+---+
6 | | | *P| *B| | B | *P| |
+---+---+---+---+---+---+---+---+
5 | | *P| | | | | | *P|
+---+---+---+---+---+---+---+---+
4 | | | | P | | *N| | R |
+---+---+---+---+---+---+---+---+
3 | | B | | | | P | | |
+---+---+---+---+---+---+---+---+
2 | P | P | | | | P | K | |
+---+---+---+---+---+---+---+---+
1 | | | Q | | | | | R |
+---+---+---+---+---+---+---+---+
a b c d e f g h
solution 1. Qxf4
time surplus 0.00 time limit 10:00 (10:00)
nss depth time score variation (1)
7 0.19 ++ 1. Kf1!!
7-> 0.36 -2.13 1. Kf1 Re2 2. Bc2 c5 3. d5 Kf8
8 1.11 -1.82 1. Kf1 a6 2. Bg5 Ne2 3. Qc2 Kg7 4.
Re4 Rxe4 5. Qxe4
8-> 1.14 -1.82 1. Kf1 a6 2. Bg5 Ne2 3. Qc2 Kg7 4.
Re4 Rxe4 5. Qxe4
9 3.39 -1.72 1. Kf1 Kh7 2. Rg1 Re2 3. Bc2 c5 4.
Rg5 cxd4 5. Rgxh5+ Kg8
9 3.81 ++ 1. Qxf4!!
9 14.67 Mat06 1. Qxf4 Bxf4 2. Rxh5 gxh5 3. Rxh5 Bh6
4. Rxh6 Qh2+ 5. Kxh2 Rd6 6. Rh8#
9-> 14.67 Mat06 1. Qxf4 Bxf4 2. Rxh5 gxh5 3. Rxh5 Bh6
4. Rxh6 Qh2+ 5. Kxh2 Rd6 6. Rh8#
10 16.78 Mat06 1. Qxf4 Bxf4 2. Rxh5 gxh5 3. Rxh5 Bh6
4. Rxh6 Qh2+ 5. Kxh2 Rd6 6. Rh8#
10-> 16.89 Mat06 1. Qxf4 Bxf4 2. Rxh5 gxh5 3. Rxh5 Bh6
4. Rxh6 Qh2+ 5. Kxh2 Rd6 6. Rh8#
11 21.22 Mat06 1. Qxf4 Bxf4 2. Rxh5 gxh5 3. Rxh5 Bh6
4. Rxh6 Qh2+ 5. Kxh2 Rd6 6. Rh8#
11-> 21.33 Mat06 1. Qxf4 Bxf4 2. Rxh5 gxh5 3. Rxh5 Bh6
4. Rxh6 Qh2+ 5. Kxh2 Rd6 6. Rh8#
time=21.33 cpu=199% mat=-1 n=28313008 fh=91% nps=1327379
ext-> checks=2648734 recaps=159696 pawns=5183 1rep=249107
thrt:181823
predicted=0 nodes=28313008 evals=966559
endgame tablebase-> probes done=0 successful=0
SMP-> split=257 stop=33 data=6/64 cpu=42.53 elap=21.33
======================================================================
! CCC !
======================================================================
+---+---+---+---+---+---+---+---+
8 | | | *K| | | | | |
+---+---+---+---+---+---+---+---+
7 | | | | | | | | |
+---+---+---+---+---+---+---+---+
6 | | | | *P| *R| | | *P|
+---+---+---+---+---+---+---+---+
5 | | | | | | Q | *P| |
+---+---+---+---+---+---+---+---+
4 | | | | | | | | |
+---+---+---+---+---+---+---+---+
3 | | | | | | | P | |
+---+---+---+---+---+---+---+---+
2 | | | | *P| *Q| P | | P |
+---+---+---+---+---+---+---+---+
1 | R | | | | | | K | |
+---+---+---+---+---+---+---+---+
a b c d e f g h
solution 1. Ra8+
end-game phase
time surplus 0.00 time limit 10:00 (10:00)
nss depth time score variation (1)
(2) 7 0.23 -0.20 1. Qc2+ Kd8 2. Ra8+ Ke7 3. Qh7+ Kf6
4. Qxh6+ Kf5 5. Rf8+ Ke5 6. Qxg5+ Kd4
7. Qf4+
7-> 0.28 -0.20 1. Qc2+ Kd8 2. Ra8+ Ke7 3. Qh7+ Kf6
4. Qxh6+ Kf5 5. Rf8+ Ke5 6. Qxg5+ Kd4
7. Qf4+
8 0.33 -0.21 1. Qc2+ Kd8 2. Ra8+ Ke7 3. Qh7+ Kf6
4. Qxh6+ Kf5 5. Rf8+ Ke5 6. Qxg5+ Kd4
7. Qf4+ Kc3
(3) 8-> 0.47 -0.21 1. Qc2+ Kd8 2. Ra8+ Ke7 3. Qh7+ Kf6
4. Qxh6+ Kf5 5. Rf8+ Ke5 6. Qxg5+ Kd4
7. Qf4+ Kc3
(2) 9 0.61 -0.24 1. Qc2+ Kd8 2. Ra8+ Ke7 3. Qh7+ Kf6
4. Qxh6+ Kf5 5. Rf8+ Ke5 6. Qxg5+ Kd4
7. Qf4+ Kd3 8. Qf5+ Re4
(2) 9-> 0.97 -0.24 1. Qc2+ Kd8 2. Ra8+ Ke7 3. Qh7+ Kf6
4. Qxh6+ Kf5 5. Rf8+ Ke5 6. Qxg5+ Kd4
7. Qf4+ Kd3 8. Qf5+ Re4
10 1.39 -- 1. Qc2+
10 1.97 -0.64 1. Qc2+ Kd8 2. Ra8+ Ke7 3. Qh7+ Kf6
4. Qxh6+ Kf5 5. Rf8+ Ke5 6. Qxg5+ Kd4
7. Rf4+ Kc3 8. Qa5+ Kb2 9. Rb4+ Kc2
(3) 10-> 2.97 -0.64 1. Qc2+ Kd8 2. Ra8+ Ke7 3. Qh7+ Kf6
4. Qxh6+ Kf5 5. Rf8+ Ke5 6. Qxg5+ Kd4
7. Rf4+ Kc3 8. Qa5+ Kb2 9. Rb4+ Kc2
11 2.98 ++ 1. Qc2+!!
(2) 11 24.00 0.02 1. Qc2+ Kd8 2. Ra8+ Ke7 3. Qh7+ Kf6
4. Qxh6+ Kf5 5. Rf8+ Ke5 6. Qxg5+ Kd4
7. Rf4+ Kc3 8. Qa5+ Kc2 9. Qa4+ Kc3
10. Rd4
11-> 25.36 0.02 1. Qc2+ Kd8 2. Ra8+ Ke7 3. Qh7+ Kf6
4. Qxh6+ Kf5 5. Rf8+ Ke5 6. Qxg5+ Kd4
7. Rf4+ Kc3 8. Qa5+ Kc2 9. Qa4+ Kc3
10. Rd4
12 27.20 0.00 1. Qc2+ Kd8 2. Ra8+ Ke7 3. Qh7+ Kf6
4. Qxh6+ Kf5 5. Rf8+ Ke5 6. Qxg5+ Kd4
7. Rf4+ Kc3 8. Qa5+ Kc2 9. Qa4+ Kc3
10. Qa5+
(2) 12-> 30.47 0.00 1. Qc2+ Kd8 2. Ra8+ Ke7 3. Qh7+ Kf6
4. Qxh6+ Kf5 5. Rf8+ Ke5 6. Qxg5+ Kd4
7. Rf4+ Kc3 8. Qa5+ Kc2 9. Qa4+ Kc3
10. Qa5+
13 35.31 0.04 1. Qc2+ Kd8 2. Ra8+ Ke7 3. Qh7+ Kf6
4. Qxh6+ Kf5 5. Rf8+ Ke5 6. Qxg5+ Kd4
7. Rf4+ Re4 8. Rxe4+ Kxe4 9. f3+ Kd4
10. Qg7+ Qe5 11. Qg4+ Kd3 12. f4
13 42.15 ++ 1. Ra8+!!
13-> 53.37 0.43 1. Ra8+
14 1:04 ++ 1. Ra8+!!
14 1:38 Mat13 1. Ra8+ Kd7 2. Ra7+ Kc6 3. Qc2+ Kd5
4. Ra5+ Kd4 5. Qb2+ Kc4 6. Qb5+ Kc3
7. Ra3+ Kd4 8. Ra4+ Kc3 9. Qb4+ Kc2
10. Ra2+ Kd3 11. Ra3+ Kc2 12. Rc3+
Kd1 13. Qb1#
14-> 1:49 Mat13 1. Ra8+ Kd7 2. Ra7+ Kc6 3. Qc2+ Kd5
4. Ra5+ Kd4 5. Qb2+ Kc4 6. Qb5+ Kc3
7. Ra3+ Kd4 8. Ra4+ Kc3 9. Qb4+ Kc2
10. Ra2+ Kd3 11. Ra3+ Kc2 12. Rc3+
Kd1 13. Qb1#
15 1:54 Mat13 1. Ra8+ Kd7 2. Ra7+ Kc6 3. Qc2+ Kd5
4. Ra5+ Kd4 5. Qb2+ Kc4 6. Qb5+ Kc3
7. Ra3+ Kd4 8. Ra4+ Kc3 9. Qb4+ Kc2
10. Ra2+ Kd3 11. Ra3+ Kc2 12. Rc3+
Kd1 13. Qb1#
White(1): ?
time=1:59 cpu=199% mat=-1 n=157468382 fh=97% nps=1318609
ext-> checks=21725506 recaps=271130 pawns=26916 1rep=1154090
thrt:86183
predicted=0 nodes=157468382 evals=7060288
endgame tablebase-> probes done=0 successful=0
SMP-> split=2275 stop=165 data=9/64 cpu=3:58 elap=1:59
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Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.