[d]5rk1/2p2Rpq/p2p2n1/2pPpQPp/4P2P/3P2N1/PP6/6K1 w - - 0 1
Any program find....Qe6...?....Erenburg....2004
After......Rxf7,
then...Nf5 seems to be a winning combination.....but I do not see why.
regards
Robert
From the new book...."Forcing Chess Moves"....
Hiarcs 11.2 will only make the move after you show it the winning move.
Good Test Move...
Moderator: Ras
-
F. Bluemers
- Posts: 880
- Joined: Thu Mar 09, 2006 11:21 pm
- Location: Nederland
Re: Good Test Move...
Because of zugzwang,Black will run out of decent moves.rightrook wrote:[d]5rk1/2p2Rpq/p2p2n1/2pPpQPp/4P2P/3P2N1/PP6/6K1 w - - 0 1
Any program find....Qe6...?....Erenburg....2004
After......Rxf7,
then...Nf5 seems to be a winning combination.....but I do not see why.
regards
Robert
From the new book...."Forcing Chess Moves"....
Hiarcs 11.2 will only make the move after you show it the winning move.
-
yanquis1972
- Posts: 1766
- Joined: Wed Jun 03, 2009 12:14 am
Re: Good Test Move...
somewhat bizarrely, rybka finds Qe6 in less than a second in multi-pv mode, but didnt find it by d18 in single-pv. she instead settled on the very interesting Rxc7
Analysis by Rybka 3:
1. +- (5.09): 1.Qe6 Kh8 2.Nf5
2. +/- (1.08): 1.Rxc7 Rxf5[] 2.Nxf5[] Nf8 3.Rc8 a5 4.Kh1[]
3. +/= (0.28): 1.Rxf8+ Nxf8[] 2.Qc8
4. = (-0.04): 1.Rd7 Rxf5 2.Nxf5[] Qh8 3.Rd8+[] Kh7 4.Rxh8+ Kxh8 5.Kf2 Kg8 6.Ke3 Kf7
---------
1.Rxf8+ Nxf8 2.Qxh7+ Kxh7 3.Nxh5 Ng6
+/= (0.55) Depth: 6 00:00:00 1kN
1.Rxf8+ Nxf8 2.Qc8 g6
+/= (0.39) Depth: 7 00:00:00 1kN
1.Rxf8+ Nxf8[] 2.Qc8 g6[] 3.Ne2 Qf7[] 4.Kg2
+/= (0.27) Depth: 8 00:00:00 4kN
1.Rxf8+ Nxf8[] 2.Qc8 g6[] 3.Ne2 Qd7[] 4.Qxd7 Nxd7[] 5.Kf2 Kf7 6.Ke3
= (0.25) Depth: 9 00:00:00 4kN
1.Rxf8+ Nxf8[] 2.Qc8 g6[] 3.Nf1 Qd7[] 4.Qxd7 Nxd7[] 5.Kf2 Kf7 6.Ke3 Nb6
= (0.25) Depth: 10 00:00:00 6kN
1.Rxf8+ Nxf8[] 2.Qc8 g6[] 3.Nf1 Qd7[] 4.Qxd7 Nxd7[] 5.Kf2 Kf7 6.Kf3 Ke7 7.Ke3
= (0.25) Depth: 11 00:00:00 6kN
1.Rxf8+ Nxf8[] 2.Qc8 g6[] 3.Nf1 Qd7[] 4.Qxd7 Nxd7[] 5.Kf2 Nb6 6.b3 Kf7 7.Ke3
= (0.21) Depth: 12 00:00:00 25kN
1.Rxf8+ Nxf8[] 2.Qc8 g6[] 3.b3 Qf7[] 4.Kg2 Qf4[] 5.Kh3 Qf7[] 6.a3 Qd7+[] 7.Qxd7 Nxd7[] 8.Nf1 Nb6[]
= (0.21) Depth: 13 00:00:00 103kN
1.Rxf8+ Nxf8[] 2.Qc8 g6[] 3.b3 Qf7[] 4.Kg2 Qf4[] 5.Kh3 Qf7[] 6.a3 Qd7+[] 7.Qxd7 Nxd7[] 8.Nf1 Nb6[]
= (0.21) Depth: 14 00:00:00 180kN
1.Rxf8+ Nxf8[] 2.Qc8 g6[] 3.Kf2 Qf7+ 4.Kg2 Qd7[] 5.Qxd7
= (0.23) Depth: 15 00:00:01 309kN
1.Rxf8+ Nxf8[] 2.Qc8 g6[] 3.Qe8 Qd7[] 4.Qxd7 Nxd7[] 5.Nf1 Nb6[] 6.Nd2 Na4 7.Nc4 Kf7[] 8.Kf2 Ke8 9.Ke3 Ke7
+/= (0.31) Depth: 16 00:00:03 705kN
1.Rxf8+ Nxf8[] 2.Qc8 g6[] 3.Qe8 Qd7[] 4.Qxd7 Nxd7[] 5.Nf1 Nb6[] 6.Nd2 Na4 7.Nc4 Kf7[] 8.Kf2 Ke8 9.Ke3 Ke7 10.Kd2
+/= (0.30) Depth: 17 00:00:05 1351kN
1.Rxc7
+/= (0.51 !) Depth: 17 00:00:12 3016kN
1.Rxc7
+/- (0.71 !) Depth: 17 00:00:15 3553kN
1.Rxc7
+/- (1.11 !) Depth: 17 00:00:20 4459kN
1.Rxc7 Rxf5 2.Nxf5[] c4 3.Rxc4[] Nf4 4.Rc6[] Kf7 5.Rxd6 Qh8[] 6.Rd7+ Kg6[] 7.b4 Kh7[] 8.Rxg7+ Qxg7[] 9.Nxg7 Kxg7 10.a4 Nxd3[] 11.b5 a5[] 12.b6 Nc5[] 13.Kg2 Kf7 14.Kf3 Kf8 15.Ke2
+/- (1.22) Depth: 17 00:00:41 9627kN
1.Rxc7
+- (1.42 !) Depth: 18 00:01:05 15435kN
1.Rxc7 Rxf5 2.Nxf5[] Nf4 3.Ra7 Nxd5 4.Rxg7+[] Qxg7 5.Nxg7[] Nf4 6.Ne8 Nxd3 7.b3 Nc1 8.Nxd6[] Nxa2 9.Nb7[] Nb4 10.Nxc5 Kg7 11.Kf2 Kg6 12.Kf3 Kf7 13.Ke3 Kg7
+- (1.61) Depth: 18 00:01:13 16948kN
Analysis by Rybka 3:
1. +- (5.09): 1.Qe6 Kh8 2.Nf5
2. +/- (1.08): 1.Rxc7 Rxf5[] 2.Nxf5[] Nf8 3.Rc8 a5 4.Kh1[]
3. +/= (0.28): 1.Rxf8+ Nxf8[] 2.Qc8
4. = (-0.04): 1.Rd7 Rxf5 2.Nxf5[] Qh8 3.Rd8+[] Kh7 4.Rxh8+ Kxh8 5.Kf2 Kg8 6.Ke3 Kf7
---------
1.Rxf8+ Nxf8 2.Qxh7+ Kxh7 3.Nxh5 Ng6
+/= (0.55) Depth: 6 00:00:00 1kN
1.Rxf8+ Nxf8 2.Qc8 g6
+/= (0.39) Depth: 7 00:00:00 1kN
1.Rxf8+ Nxf8[] 2.Qc8 g6[] 3.Ne2 Qf7[] 4.Kg2
+/= (0.27) Depth: 8 00:00:00 4kN
1.Rxf8+ Nxf8[] 2.Qc8 g6[] 3.Ne2 Qd7[] 4.Qxd7 Nxd7[] 5.Kf2 Kf7 6.Ke3
= (0.25) Depth: 9 00:00:00 4kN
1.Rxf8+ Nxf8[] 2.Qc8 g6[] 3.Nf1 Qd7[] 4.Qxd7 Nxd7[] 5.Kf2 Kf7 6.Ke3 Nb6
= (0.25) Depth: 10 00:00:00 6kN
1.Rxf8+ Nxf8[] 2.Qc8 g6[] 3.Nf1 Qd7[] 4.Qxd7 Nxd7[] 5.Kf2 Kf7 6.Kf3 Ke7 7.Ke3
= (0.25) Depth: 11 00:00:00 6kN
1.Rxf8+ Nxf8[] 2.Qc8 g6[] 3.Nf1 Qd7[] 4.Qxd7 Nxd7[] 5.Kf2 Nb6 6.b3 Kf7 7.Ke3
= (0.21) Depth: 12 00:00:00 25kN
1.Rxf8+ Nxf8[] 2.Qc8 g6[] 3.b3 Qf7[] 4.Kg2 Qf4[] 5.Kh3 Qf7[] 6.a3 Qd7+[] 7.Qxd7 Nxd7[] 8.Nf1 Nb6[]
= (0.21) Depth: 13 00:00:00 103kN
1.Rxf8+ Nxf8[] 2.Qc8 g6[] 3.b3 Qf7[] 4.Kg2 Qf4[] 5.Kh3 Qf7[] 6.a3 Qd7+[] 7.Qxd7 Nxd7[] 8.Nf1 Nb6[]
= (0.21) Depth: 14 00:00:00 180kN
1.Rxf8+ Nxf8[] 2.Qc8 g6[] 3.Kf2 Qf7+ 4.Kg2 Qd7[] 5.Qxd7
= (0.23) Depth: 15 00:00:01 309kN
1.Rxf8+ Nxf8[] 2.Qc8 g6[] 3.Qe8 Qd7[] 4.Qxd7 Nxd7[] 5.Nf1 Nb6[] 6.Nd2 Na4 7.Nc4 Kf7[] 8.Kf2 Ke8 9.Ke3 Ke7
+/= (0.31) Depth: 16 00:00:03 705kN
1.Rxf8+ Nxf8[] 2.Qc8 g6[] 3.Qe8 Qd7[] 4.Qxd7 Nxd7[] 5.Nf1 Nb6[] 6.Nd2 Na4 7.Nc4 Kf7[] 8.Kf2 Ke8 9.Ke3 Ke7 10.Kd2
+/= (0.30) Depth: 17 00:00:05 1351kN
1.Rxc7
+/= (0.51 !) Depth: 17 00:00:12 3016kN
1.Rxc7
+/- (0.71 !) Depth: 17 00:00:15 3553kN
1.Rxc7
+/- (1.11 !) Depth: 17 00:00:20 4459kN
1.Rxc7 Rxf5 2.Nxf5[] c4 3.Rxc4[] Nf4 4.Rc6[] Kf7 5.Rxd6 Qh8[] 6.Rd7+ Kg6[] 7.b4 Kh7[] 8.Rxg7+ Qxg7[] 9.Nxg7 Kxg7 10.a4 Nxd3[] 11.b5 a5[] 12.b6 Nc5[] 13.Kg2 Kf7 14.Kf3 Kf8 15.Ke2
+/- (1.22) Depth: 17 00:00:41 9627kN
1.Rxc7
+- (1.42 !) Depth: 18 00:01:05 15435kN
1.Rxc7 Rxf5 2.Nxf5[] Nf4 3.Ra7 Nxd5 4.Rxg7+[] Qxg7 5.Nxg7[] Nf4 6.Ne8 Nxd3 7.b3 Nc1 8.Nxd6[] Nxa2 9.Nb7[] Nb4 10.Nxc5 Kg7 11.Kf2 Kg6 12.Kf3 Kf7 13.Ke3 Kg7
+- (1.61) Depth: 18 00:01:13 16948kN
-
rightrook
- Posts: 1452
- Joined: Wed Mar 08, 2006 8:45 pm
Re: Good Test Move...
>>>Because of zugzwang,Black will run out of decent moves.<<<
OK...thanks...I never thought of that.....
OK...thanks...I never thought of that.....
-
jdart
- Posts: 4406
- Joined: Fri Mar 10, 2006 5:23 am
- Location: http://www.arasanchess.org
Re: Good Test Move...
Arasan, latest build, doesn't get it in 5 minutes:
0 0.00 Rxc7 -2.88 6
0 0.00 Rxf8+ +1.08 16
1 0.00 Rxf8+ +1.08 101
2 0.00 Rxf8+ +1.08 632
3 0.00 Rxf8+ +0.96 1507
4 0.00 Rxf8+ +1.28 4092
5 0.01 Rxf8+ +1.36 6055
6 0.01 Rxf8+ +1.44 11343
7 0.03 -- +0.94 42605
7 0.04 Rxf8+ +0.64 55990
8 0.04 Rxf8+ +0.64 88683
9 0.07 Rxf8+ +0.64 145147
10 0.11 Rxf8+ +0.92 245220
11 0.17 Rxf8+ +0.92 396451
12 0.31 Rxf8+ +0.60 863221
13 0.92 Rxf8+ +0.20 2878927
14 1.53 Rxf8+ +0.21 4874653
15 5.51 Rxf8+ +0.20 17621466
15 11.75 Rxc7 +0.35 36153589
16 16.23 Rxc7 +0.84 50028672
17 22.90 Rxc7 +0.88 70687925
18 37.34 Rxc7 +1.37 116347847
19 77.51 Rxc7 +1.86 243120897
20 158.20 -- +1.36 492066386
20 244.89 Rxc7 +1.08 764923522
3.15M nodes/second.
0 tablebase probes, 0 tablebase hits
3851 splits, average thread usage=3.99
result: Rxc7 score: +1.08 ** not solved in 300.09 secs. 943.97M nodes)
Rxc7 Rxf5 Nxf5 Nf4 Ra7 Nxd5 Rxg7+ Qxg7 Nxg7 Nf4 Ne8 Nxd3 b3 Nc1 Nxd6 Nxa2 Nb7 c4
bxc4 Nc3 Nd6 a5
Rybka 3 doesn't either:
no 2 20 +74 374 Rxf8+
no 3 20 +75 524 Rxf8+
no 4 20 +43 1118 Rxf8+
no 5 20 +63 1226 Rxf8+
no 5 20 +76 1473 Rxf8+ Nxf8 Qc8
no 6 30 +56 5205 Rxf8+ Nxf8 Qxh7+ Kxh7 Nxh5 Ng6
no 7 60 +36 9392 Rxf8+ Nxf8 Qc8 g6
no 8 90 +25 14509 Rxf8+ Nxf8 Qc8 g6 Nf1 Qf7 Kg2
no 9 130 +31 22076 Rxf8+ Nxf8 Qc8 g6 Nf1 a5 Kg2 Qd7
no 10 190 +29 33977 Rxf8+ Nxf8 Qc8 g6 Nf1 a5 Kg2 Qd7 Qxd7
Nxd7 Nd2
no 11 360 +25 64594 Rxf8+ Nxf8 Qc8 g6 Nf1 Qd7 Qxd7 Nxd7 Kf2
Kf7 Ke3 Nb6
no 12 550 +31 101031 Rxf8+ Nxf8 Qc8 g6 b3 Qd7 Qxd7 Nxd7
no 13 720 +31 135444 Rxf8+ Nxf8 Qc8 g6 b3 Qd7 Qxd7 Nxd7
no 14 1380 +21 253235 Rxf8+ Nxf8 Qc8 g6 b3 Qd7 Qxd7 Nxd7 Nf1
Kg7 Kf2 Nb6 Nd2 Nc8 Kf3
no 15 2250 +22 421256 Rxf8+ Nxf8 Qc8 g6 Qe8 Qd7 Qxd7
no 16 3450 +22 669310 Rxf8+ Nxf8 Qc8 g6 Qe8 Qd7 Qxd7 Nxd7 Nf1
Nb6 Nd2 Na4 Nc4 Kf8 Kf2 Kf7 Kf3 Ke7
no 17 5250 +22 1021340 Rxf8+ Nxf8 Qc8 g6 Qe8 Qd7 Qxd7 Nxd7 Nf1
Nb6 Nd2 Na4 Nc4 Kf8 Kf2 Kf7 Kf3 Ke7 Ke3
no 17 14660 +42 2521560 Rxc7
no 17 23950 +62 4078375 Rxc7
no 17 31610 +102 5159010 Rxc7
no 17 64880 +128 10546640 Rxc7 Rxf5 Nxf5 c4 Rxc4 Nf4 Rc6 Nxd5 Rxd6
Nf4 Rxa6 Kf7 Ra7+ Kf8 Rxg7 Qxg7 Nxg7 Kxg7
b4 Kf8 b5 Ke7 a4 Kd6
no 18 108280 +118 18396770 Rxc7 Rxf5 Nxf5 c4 Rxc4 Nf4 Rc6 Kf7 Nxd6+
Ke7 Rxa6 Nxd5 Nf5+ Kd7 Rd6+ Kc7
no 19 163500 +138 27820209 Rxc7
no 19 169340 +137 29060952 Rxc7 Rxf5 Nxf5 c4 Rxc4 Nf4 Rc6 Kf7 Rxa6
Nxd5 Ra7+ Kf8 Rxg7 Qxf5 exf5 Kxg7 a4 Nb4
a5 d5 Kg2 Kh7 Kf3 Kg7 Ke3
no 20 264610 +145 46381660 Rxc7 Rxf5 Nxf5 Nf4 Ra7 Nxd5 Rxg7+ Qxg7
Nxg7 Nf4 Nf5 Nxd3 b3 Nc1 Nxd6 Nxa2 Nb7
Nb4 Nxc5 a5 Kf2 Nc6 Nb7 Kh8 Ke3 Kh7 Kd2
Kg6 Kd3
Result: Failure
-------------------------------------------------------------------------------
Results:
0 problems solved.
1 problem unsolved.
0 0.00 Rxc7 -2.88 6
0 0.00 Rxf8+ +1.08 16
1 0.00 Rxf8+ +1.08 101
2 0.00 Rxf8+ +1.08 632
3 0.00 Rxf8+ +0.96 1507
4 0.00 Rxf8+ +1.28 4092
5 0.01 Rxf8+ +1.36 6055
6 0.01 Rxf8+ +1.44 11343
7 0.03 -- +0.94 42605
7 0.04 Rxf8+ +0.64 55990
8 0.04 Rxf8+ +0.64 88683
9 0.07 Rxf8+ +0.64 145147
10 0.11 Rxf8+ +0.92 245220
11 0.17 Rxf8+ +0.92 396451
12 0.31 Rxf8+ +0.60 863221
13 0.92 Rxf8+ +0.20 2878927
14 1.53 Rxf8+ +0.21 4874653
15 5.51 Rxf8+ +0.20 17621466
15 11.75 Rxc7 +0.35 36153589
16 16.23 Rxc7 +0.84 50028672
17 22.90 Rxc7 +0.88 70687925
18 37.34 Rxc7 +1.37 116347847
19 77.51 Rxc7 +1.86 243120897
20 158.20 -- +1.36 492066386
20 244.89 Rxc7 +1.08 764923522
3.15M nodes/second.
0 tablebase probes, 0 tablebase hits
3851 splits, average thread usage=3.99
result: Rxc7 score: +1.08 ** not solved in 300.09 secs. 943.97M nodes)
Rxc7 Rxf5 Nxf5 Nf4 Ra7 Nxd5 Rxg7+ Qxg7 Nxg7 Nf4 Ne8 Nxd3 b3 Nc1 Nxd6 Nxa2 Nb7 c4
bxc4 Nc3 Nd6 a5
Rybka 3 doesn't either:
no 2 20 +74 374 Rxf8+
no 3 20 +75 524 Rxf8+
no 4 20 +43 1118 Rxf8+
no 5 20 +63 1226 Rxf8+
no 5 20 +76 1473 Rxf8+ Nxf8 Qc8
no 6 30 +56 5205 Rxf8+ Nxf8 Qxh7+ Kxh7 Nxh5 Ng6
no 7 60 +36 9392 Rxf8+ Nxf8 Qc8 g6
no 8 90 +25 14509 Rxf8+ Nxf8 Qc8 g6 Nf1 Qf7 Kg2
no 9 130 +31 22076 Rxf8+ Nxf8 Qc8 g6 Nf1 a5 Kg2 Qd7
no 10 190 +29 33977 Rxf8+ Nxf8 Qc8 g6 Nf1 a5 Kg2 Qd7 Qxd7
Nxd7 Nd2
no 11 360 +25 64594 Rxf8+ Nxf8 Qc8 g6 Nf1 Qd7 Qxd7 Nxd7 Kf2
Kf7 Ke3 Nb6
no 12 550 +31 101031 Rxf8+ Nxf8 Qc8 g6 b3 Qd7 Qxd7 Nxd7
no 13 720 +31 135444 Rxf8+ Nxf8 Qc8 g6 b3 Qd7 Qxd7 Nxd7
no 14 1380 +21 253235 Rxf8+ Nxf8 Qc8 g6 b3 Qd7 Qxd7 Nxd7 Nf1
Kg7 Kf2 Nb6 Nd2 Nc8 Kf3
no 15 2250 +22 421256 Rxf8+ Nxf8 Qc8 g6 Qe8 Qd7 Qxd7
no 16 3450 +22 669310 Rxf8+ Nxf8 Qc8 g6 Qe8 Qd7 Qxd7 Nxd7 Nf1
Nb6 Nd2 Na4 Nc4 Kf8 Kf2 Kf7 Kf3 Ke7
no 17 5250 +22 1021340 Rxf8+ Nxf8 Qc8 g6 Qe8 Qd7 Qxd7 Nxd7 Nf1
Nb6 Nd2 Na4 Nc4 Kf8 Kf2 Kf7 Kf3 Ke7 Ke3
no 17 14660 +42 2521560 Rxc7
no 17 23950 +62 4078375 Rxc7
no 17 31610 +102 5159010 Rxc7
no 17 64880 +128 10546640 Rxc7 Rxf5 Nxf5 c4 Rxc4 Nf4 Rc6 Nxd5 Rxd6
Nf4 Rxa6 Kf7 Ra7+ Kf8 Rxg7 Qxg7 Nxg7 Kxg7
b4 Kf8 b5 Ke7 a4 Kd6
no 18 108280 +118 18396770 Rxc7 Rxf5 Nxf5 c4 Rxc4 Nf4 Rc6 Kf7 Nxd6+
Ke7 Rxa6 Nxd5 Nf5+ Kd7 Rd6+ Kc7
no 19 163500 +138 27820209 Rxc7
no 19 169340 +137 29060952 Rxc7 Rxf5 Nxf5 c4 Rxc4 Nf4 Rc6 Kf7 Rxa6
Nxd5 Ra7+ Kf8 Rxg7 Qxf5 exf5 Kxg7 a4 Nb4
a5 d5 Kg2 Kh7 Kf3 Kg7 Ke3
no 20 264610 +145 46381660 Rxc7 Rxf5 Nxf5 Nf4 Ra7 Nxd5 Rxg7+ Qxg7
Nxg7 Nf4 Nf5 Nxd3 b3 Nc1 Nxd6 Nxa2 Nb7
Nb4 Nxc5 a5 Kf2 Nc6 Nb7 Kh8 Ke3 Kh7 Kd2
Kg6 Kd3
Result: Failure
-------------------------------------------------------------------------------
Results:
0 problems solved.
1 problem unsolved.
-
Terry McCracken
- Posts: 16465
- Joined: Wed Aug 01, 2007 4:16 am
- Location: Canada
Re: Good Test Move...
Who were the players? Cute win, thanks.rightrook wrote:[d]5rk1/2p2Rpq/p2p2n1/2pPpQPp/4P2P/3P2N1/PP6/6K1 w - - 0 1
Any program find....Qe6...?....Erenburg....2004
After......Rxf7,
then...Nf5 seems to be a winning combination.....but I do not see why.
regards
Robert
From the new book...."Forcing Chess Moves"....
Hiarcs 11.2 will only make the move after you show it the winning move.
Terry McCracken
-
Eelco de Groot
- Posts: 4669
- Joined: Sun Mar 12, 2006 2:40 am
- Full name: Eelco de Groot
Re: Good Test Move...
Okay, thanks Jon, but what about after 15 minutes?jdart wrote:Arasan, latest build, doesn't get it in 5 minutes:
Rybka 3 doesn't either:
I think the problem is just too difficult for a 5 minute test. In spite of the fact that programs like Rybka and Hiarcs see it very fast after entering the move or in the case of Rybka also in multi_PV.
I don't have Rybka III but I would not be surprised if after ten or fifteen minutes she still does not see it? Assuming she is using a form of null move in null window searches. This result makes that likely and I think it shows that Zugzwang detectection and/or verified nullmove in the top programs is not up to the task at least not in Robert's testposition or it is compromised for more aggressive null move pruning.
Eelco
[d]5rk1/2p2Rpq/p2p2n1/2pPpQPp/4P2P/3P2N1/PP6/6K1 w - -
Engine: Ancalagon 1.3 Weak Squares 180 Board Control middlegame 50 endgame 50
Build 311 (Athlon 2009 MHz, 256 MB) by Romstad, Costalba, Kiiski, de Groot
2.01 0:05 +1.50 1.Rxf8+ Nxf8 2.Qc8 g6 3.Qxa6 Qf7
4.Kg2 Kg7 5.Qc6 (110.402) 20
3.01 0:05 +1.58 1.Rxf8+ Nxf8 2.Qc8 g6 3.Qxa6 Qf7
4.Kg2 Qd7 5.Qc6 Kf7 (289.916) 51
4.01 0:06 +1.55 1.Rxf8+ Nxf8 2.Qc8 g6 3.Qxa6 Qd7
4.Kf2 Qh3 5.Qa5 Qh2+ 6.Kf3 Qxb2
7.Qxc7 (621.415) 101
5.01 0:06 +1.41 1.Rxf8+ Nxf8 2.Qc8 g6 3.Qxa6 Qd7
4.Kf2 Qh3 5.Qa5 Qh2+ 6.Kf3 Qxh4
7.Qxc7 Qf4+ 8.Kg2 (949.201) 144
6.01 0:44 +0.41 1.Rxf8+ Nxf8 (30.411.589) 687
7.01 1:03 +0.41 1.Rxf8+ Nxf8 (45.565.467) 718
8.01 1:35 +0.43 1.Rxf8+ Nxf8 2.Qf3 g6 3.Nf1 Qd7 4.b3 Qb5
5.Qd1 Qb4 6.Kf2 Qd4+ 7.Ne3 Qb2+
8.Qe2 Qa1 9.Qd2 Qh1 10.Ng2 Qh3 11.a3 Nd7
12.Qe3 Qh2 13.Qf3 (70.717.889) 738
9.01 2:17 +0.41 1.Rxf8+ Nxf8 2.Qf3 g6 3.Nf1 Qf7
4.Kf2 Nd7 5.Ke3 Qxf3+ 6.Kxf3 Kf8
7.Ne3 Nb6 8.Ke2 Na4 9.Nc4 Nb6 10.Ke3 Nxc4+
11.dxc4 Ke7 12.b3 (104.289.947) 756
9.03 3:06 +1.47 1.Rxc7 (133.792.912) 716
10.01 20:49 +1.98 1.Rxc7 Rxf5 2.Nxf5 Nf4 3.Ra7 Nxd5
4.Rxg7+ Qxg7 5.Nxg7 Nf4 6.Nf5 Nxd3
7.b3 Nc1 8.Nxd6 Nxa2 9.Nb7 Kg7
10.Kg2 a5 11.Nxc5 Nb4 12.Kg3 Kg6 (764.159.968) 611
11.01 25:44 +2.06 1.Rxc7 Rxf5 2.Nxf5 Nf8 3.Kf1 Kh8
4.Rc8 Qg8 5.g6 Nxg6 6.Rxg8+ (946.403.988) 612
12.01 29:03 +2.01 1.Rxc7 Rxf5 2.Nxf5 Nf4 3.Ra7 Nxd5
4.Rxg7+ Qxg7 5.Nxg7 Nf4 6.Ne8 (1.083.951.288) 621
13.01 43:43 +2.12 1.Rxc7 Rxf5 2.Nxf5 Nf4 3.Ra7 Nxd5
4.Rxg7+ Qxg7 5.Nxg7 Nf4 6.Ne8 (1.687.837.502) 643
14.01 57:36 +1.99 1.Rxc7 Rxf5 2.Nxf5 Nf4 3.Ra7 Nxd5
4.Rxg7+ Qxg7 5.Nxg7 Nf4 6.Ne8 (2.237.670.969) 647
But after entering at this point the solution Ancalagon suddenly sees the light
[d]5rk1/2p2Rpq/p2pQ1n1/2pPp1Pp/4P2P/3P2N1/PP6/6K1 b - -
Engine: Ancalagon 1.3 Weak Squares 180 Board Control middlegame 50 endgame 50
Build 311 (Athlon 2009 MHz, 256 MB) by Romstad, Costalba, Kiiski, de Groot
2.00 0:00 +1.50 1...Rxf7 2.Nf5 a5 3.Kh2 a4 4.a3 Qh8
5.Qxg6 Kf8 6.Kg1 Rd7 (411.381) 572
3.00 0:00 +1.82 1...Rxf7 2.Nf5 a5 3.Kh2 a4 4.a3 Qh8
5.Qxg6 (462.746) 592
4.00 0:00 +1.82 1...Rxf7 2.Nf5 a5 3.Kh2 a4 4.a3 Qh8
5.Qxg6 (482.728) 593
5.00 0:00 +1.70 1...Rxf7 2.Nf5 a5 3.Kh2 a4 4.a3 Qh8
5.Qxg6 Kf8 (519.596) 604
6.00 0:01 +1.47 1...Rxf7 2.Nf5 (622.841) 622
7.01 0:01 +0.41 1...Rxf7 2.Nf5 (918.873) 638
8.01 0:02 -3.82 1...Rxf7 2.Nf5 (1.785.658) 664
9.01 8:36 -13.64 1...Rxf7 2.Nf5 c4 3.dxc4 a5 4.Kh2 Ne7
5.Nxe7+ Kf8 6.Ng6+ Qxg6 7.Qxg6 a4
8.a3 Rf4 9.Kg3 Rg4+ 10.Kh3 Rf4
11.Qe6 Rf2 12.Qc8+ Kf7 13.Kg3 Rf4
14.Qxc7+ Kg8 (322.454.740) 623
9.05 10:54 -12.12 1...a5 2.Rxc7+ Kh8 3.Qxd6 Re8 4.Nf5 Rg8
5.Qe6 Nf4 6.Qxe5 Nxd3 7.Qe7 Rb8 8.d6 Qg8
9.Nh6 Qf8 10.Nf7+ Kg8 (387.168.287) 591
9.07 11:15 -8.51 1...c4 2.dxc4 Kh8 3.Nf5 Qg8 4.Nh6 Qxf7
5.Nxf7+ Kh7 6.c5 Nxh4 7.cxd6 cxd6
8.Nxd6 Nf3+ 9.Kg2 (397.413.636) 588
9.11 12:17 -6.90 1...Kh8 2.Rxf8+ Nxf8 3.Qe8 Qg8
4.Qxh5+ Qh7 5.Qf7 Qg8 6.Qxc7 g6
7.Qxd6 Qg7 8.Qxc5 Kg8 9.d6 Qf7
10.Kg2 Qe6 (433.123.449) 586
10.01 32:50 -16.86 1...Kh8 2.Qxg6 (1.179.568.126) 598
10.02 33:04 -8.79 1...c4 2.dxc4 Kh8 3.Nf5 Qg8 4.Nh6 Qxf7
5.Nxf7+ Kh7 6.c5 Nxh4 7.cxd6 cxd6
8.Nxd6 Nf3+ 9.Kg2 Ne1+ 10.Kh2 Nf3+
11.Kg3 (1.186.903.256) 597
11.01 42:53 -14.23 1...c4 2.Rxf8+ (1.504.924.113) 584
11.03 72:08 -10.84 1...a5 2.Rxc7+ Kh8 3.Qxd6 c4 4.dxc4 Rg8
5.Nf5 Nxh4 6.Nxh4 Qxe4 7.Ng2 Qf5
8.g6 Rf8 9.Qe7 Rg8 10.Rc6 a4 11.c5 a3
12.bxa3 e4 13.Rd6 Qg4 (2.319.919.431) 535
11.07 77:06 -3.85 1...Rxf7 (2.458.698.778) 531
12.01 85:34 -15.00 1...Rxf7 2.Nf5 (2.781.084.172) 541
12.02 93:17 -11.04 1...a5 2.Rxc7+ Kh8 3.Qxd6 c4 4.dxc4 Rg8
5.Nf5 Nxh4 6.Nxh4 Qxe4 7.Ng2 Qf5
8.g6 Rf8 9.Qe7 Rg8 10.Rc6 a4 11.c5 a3
12.bxa3 e4 13.Rd6 Qf8 (2.999.704.297) 535
best move: a6-a5 time: 96:27.250 min n/s: 534.075 nodes: 3.090.810.318
Last edited by Eelco de Groot on Sat Sep 26, 2009 8:04 pm, edited 2 times in total.
Debugging is twice as hard as writing the code in the first
place. Therefore, if you write the code as cleverly as possible, you
are, by definition, not smart enough to debug it.
-- Brian W. Kernighan
place. Therefore, if you write the code as cleverly as possible, you
are, by definition, not smart enough to debug it.
-- Brian W. Kernighan
-
F. Bluemers
- Posts: 880
- Joined: Thu Mar 09, 2006 11:21 pm
- Location: Nederland
Re: Good Test Move...
Nice,Fruit 2.2.1 finds Qe6 with a bit of hammering on the search options 
Standard:
Null move pruning disabled(as zugzwang plays a big role in this position):
In the last iteration it had Qe6 till I stopped the search (5 minutes).Close but no cigar.
No null move pruning and no lmr ("history pruning"):
Got it 
Standard:
Code: Select all
12/27 0:00 +0.67 1.Txf8+ Pxf8 2.Dc8 g6 3.Db7 a5 4.Kg2 Dd7 5.Da7 a4 6.Db7 Kg7 7.Kh2 Df7 (703.899)
13/33 0:02 +0.39 1.Txf8+ Pxf8 2.Df2 g6 3.Pf1 Df7 4.Kg2 Kg7 5.Df3 Kg8 6.Pe3 Pd7 7.Pc4 Df4 8.Dxf4 exf4 (3.776.767) 1602
14/35 0:02 +0.40 1.Txf8+ Pxf8 2.Df2 g6 3.Pf1 Df7 4.Kg2 Kg7 5.Df3 Pd7 6.Dxf7+ Kxf7 7.Pe3 Kf8 8.Kf2 Ke7 9.Pc4 Pb6 (4.776.491) 1605
15/36 0:05 +0.42 1.Txf8+ Pxf8 2.Kg2 g6 3.Dc8 Dd7 4.Dxd7 Pxd7 5.Pf1 Kf7 6.Kf3 Pb6 7.Pd2 Ke7 8.Pc4 Pxc4 9.dxc4 a5 10.Ke3 (8.755.432) 1595
16/40 0:08 +0.41 1.Txf8+ Pxf8 2.Dh3 g6 3.Pf1 Dd7 4.Dxd7 Pxd7 5.Kf2 Kf7 6.Pe3 Pb6 7.Pc4 Ke8 8.Ke3 Ke7 9.Pa5 Kd7 10.Pc6 (13.355.465) 1600
17/43 0:12 +0.40 1.Txf8+ Pxf8 2.Dh3 g6 3.Pf1 De7 4.Pe3 De8 5.Dh2 Kg7 6.Pc4 Pd7 7.Df2 Df7 8.Dxf7+ Kxf7 9.Kg2 Ke7 10.Pe3 Kf7 11.Kf3 (20.442.792) 1603
18/43 0:18 +0.42 1.Txf8+ Pxf8 2.Dh3 g6 3.Pf1 De7 4.Pe3 De8 5.Dh2 Kg7 6.Pc4 Pd7 7.Df2 Df7 8.Dxf7+ Kxf7 9.Kg2 Pb6 10.Kf3 Pxc4 11.dxc4 Ke7 12.Ke3 (30.508.658) 1605
19/51 0:43 +0.40 1.Txf8+ Pxf8 2.Kg2 g6 3.Dc8 Df7 4.Pe2 Dd7 5.Dxd7 Pxd7 6.Kf2 Kf7 7.Ke3 Pb6 8.b3 Ke7 9.a3 Kf7 10.Pc3 Ke7 11.Kd2 a5 (69.091.952) 1602
20/51 1:16 +0.34 1.Txf8+ Pxf8 2.Kg2 g6 3.Dc8 Df7 4.Kh2 Df4 5.Kh3 Df7 6.b3 a5 7.Db7 Dd7+ 8.Kg2 Dg4 9.Dxc7 Dxh4 10.Dd8 Dg4 11.Dxd6 h4 12.Dxe5 hxg3 13.Dxg3 (122.946.327) 1598
20/62 4:14 +1.28 1.Txc7 Txf5 2.Pxf5 c4 3.Txc4 Pf4 4.Tc6 a5 5.Txd6 Kf7 6.Td7+ Kf8 7.Kh2 a4 8.Txg7 Dxg7 9.Pxg7 Kxg7 10.Kg3 Kf7 11.d4 Pe2+ 12.Kf2 a3 13.bxa3 Pxd4 (389.125.486) 1530
beste zet: Tf7xc7 tijd: 5:06.417 min n/s: 1.522.888 CPU 100.0% n/s(1CPU): 1.522.888 nodes: 466.520.000
Code: Select all
10/27 0:00 +1.27 1.Txf8+ Pxf8 2.Dc8 g6 3.Dxa6 Df7 4.Kg2 Df4 5.Da5 Dc1 6.Dc3 Dxc3 7.bxc3 (1.014.200)
11/30 0:02 +0.62 1.Txf8+ Pxf8 2.Dc8 g6 3.Kg2 Dd7 4.Db7 a5 5.a4 Kg7 6.Da7 Dxa4 7.Dxc7+ Dd7 8.Dxa5 (3.079.783) 1385
12/32 0:04 +0.80 1.Txf8+ Pxf8 2.Dc8 g6 3.Kg2 Dd7 4.Db7 a5 5.a4 Dxa4 6.Dxc7 Da1 7.Dxd6 Dxb2+ 8.Kh3 (6.831.704) 1390
13/38 0:23 +0.41 1.Txf8+ Pxf8 2.Dh3 g6 3.Pf1 Df7 4.Pe3 Df4 5.Kg2 Df7 6.Pc4 Pd7 7.De6 Kg7 8.Dxf7+ Kxf7 9.Kf3 (32.396.548) 1395
14/40 0:45 +0.48 1.Txf8+ Pxf8 2.Dh3 g6 3.Pf1 Df7 4.Pe3 Df4 5.Kg2 Kf7 6.b3 Ke7 7.Pc4 Dc1 8.Kf3 Df4+ 9.Ke2 Dg4+ 10.Dxg4 hxg4 (62.906.325) 1384
15/44 2:10 +0.49 1.Txf8+ Pxf8 2.Dc8 g6 3.Kg2 Dd7 4.Dxd7 Pxd7 5.Pf1 Kf7 6.Kf3 Pb6 7.Pe3 Ke7 8.b3 Kf7 9.a3 Ke7 (177.654.290) 1360
beste zet: Tf7xf8 tijd: 5:09.132 min n/s: 1.297.024 CPU 100.0% n/s(1CPU): 1.297.024 nodes: 400.870.000
No null move pruning and no lmr ("history pruning"):
Code: Select all
10/29 0:01 +1.27 1.Txf8+ Pxf8 2.Dc8 g6 3.Dxa6 Df7 4.Kg2 Df4 5.Da5 Dc1 6.Dc3 Dxc3 7.bxc3 (2.637.925) 1360
11/33 0:06 +0.62 1.Txf8+ Pxf8 2.Dc8 g6 3.Kg2 Dd7 4.Db7 a5 5.a4 Kg7 6.Da7 Dxa4 7.Dxc7+ Dd7 8.Dxa5 (9.123.119) 1406
12/34 0:16 +0.80 1.Txf8+ Pxf8 2.Dc8 g6 3.Kg2 Dd7 4.Db7 a5 5.a4 Dxa4 6.Dxc7 Da1 7.Dxd6 Dxb2+ 8.Kh3 (23.538.902) 1406
13/38 0:53 +0.39 1.Txf8+ Pxf8 2.Dh3 g6 3.Pf1 Df7 4.Pe3 a5 5.Kg2 a4 6.Pc4 Df4 7.Dg3 Pd7 8.Dxf4 exf4 (75.578.648) 1402
13/50 1:48 +3.37 1.De6 Txf7 2.Pf5 a5 3.a4 Dh8 4.Dxg6 Txf5 5.Dxf5 g6 6.Dc8+ Kh7 7.Dxc7+ Kg8 8.Dxd6 Dg7 9.Dxc5 (144.805.737) 1333
14/50 2:15 +3.79 1.De6 Txf7 2.Pf5 a5 3.a4 c4 4.dxc4 Dh8 5.Dxg6 Txf5 6.Dxf5 g6 7.Dc8+ Kh7 8.Dxc7+ Dg7 9.Dxd6 (178.226.429) 1314-
kgburcham
- Posts: 2016
- Joined: Sun Feb 17, 2008 4:19 pm
Re: Good Test Move...
[d] 5rk1/2p2Rpq/p2p2n1/2pPpQPp/4P2P/3P2N1/PP6/6K1 w - - 0 1
Zappa Mexico II:
1.Qe6 Rxf7 2.Nf5 a5 3.b3 c4 4.dxc4 Qh8 5.Qxg6 Rxf5 6.Qxf5 g6 7.Qc8+
+- (3.56) Depth: 14/47 00:00:17 62018kN
1.Qe6 Rxf7 2.Nf5 a5 3.b3 c4 4.dxc4 Qh8 5.Qxg6 Rxf5 6.Qxf5 g6 7.Qc8+
+- (4.93) Depth: 15/49 00:00:30 105mN
1.Qe6 Kh8 2.Nf5 Rg8 3.Rxc7 Nf4 4.Nxd6 Qg6 5.Qxg6 Nxg6 6.Rxc5 Rb8 7.b3 Nxh4
+- (6.56) Depth: 16/51 00:03:19 684mN
1.Qe6 Kh8 2.Nf5 Qg8 3.Nh6 Qxf7 4.Nxf7+ Kh7 5.Qd7 Kg8 6.Nd8 c4 7.dxc4 Rf4 8.Qxc7 Rg4+ 9.Kf2 Rf4+ 10.Ke3 Nxh4 11.Ne6 Rf3+
+- (6.56) Depth: 17/53 00:04:29 909mN
Deep Fritz 11:
1.Qe6 Kh8 2.Nf5 Rg8 3.Rxc7 Nf4 4.Qxd6 Qg6 5.Qxe5 Nxd3 6.Qc3 Nb4 7.Qxc5 Nd3 8.Qd4 Nf4 9.Kf2 a5
+- (5.63) Depth: 17/35 00:00:07 92923kN
1.Qe6 Kh8 2.Nf5 Rg8 3.Rxc7 Nf4 4.Qxd6 Qg6 5.Qxe5 Nxd3 6.Qc3 Nb4 7.Qxc5 Nd3 8.Qd4 Nf4 9.Kf2 a5
+- (5.90) Depth: 18/33 00:00:10 130mN
1.Qe6 Kh8 2.Nf5 Rg8 3.Rxc7 Nf4 4.Qxd6 Qg6 5.Qxe5 Nxd3 6.Qc3 Nb4 7.Qxc5 Nd3 8.Qd4 Nf4 9.Kf2
+- (5.90) Depth: 19/36 00:00:17 227mN
1.Qe6 Kh8 2.Nf5 Rg8 3.Rxc7 Nf4 4.Qxd6 Qg6 5.Qxe5 Nxd3 6.Qc3 Nb4 7.Qxc5 Nd3 8.Qd4 Nf4 9.Kh2 Qh7
+- (6.00) Depth: 20/36 00:00:36 474mN
1.Qe6 Kh8 2.Nf5 Rg8 3.Rxc7 Nf4 4.Nxd6 Rf8 5.Nf7+ Kg8 6.Nh6+ Kh8 7.Qd6 Ng6 8.Qxc5 gxh6 9.Rxh7+ Kxh7 10.Qa7+ Kg8
+- (7.46) Depth: 21/41 00:01:24 1106mN
Zappa Mexico II:
1.Qe6 Rxf7 2.Nf5 a5 3.b3 c4 4.dxc4 Qh8 5.Qxg6 Rxf5 6.Qxf5 g6 7.Qc8+
+- (3.56) Depth: 14/47 00:00:17 62018kN
1.Qe6 Rxf7 2.Nf5 a5 3.b3 c4 4.dxc4 Qh8 5.Qxg6 Rxf5 6.Qxf5 g6 7.Qc8+
+- (4.93) Depth: 15/49 00:00:30 105mN
1.Qe6 Kh8 2.Nf5 Rg8 3.Rxc7 Nf4 4.Nxd6 Qg6 5.Qxg6 Nxg6 6.Rxc5 Rb8 7.b3 Nxh4
+- (6.56) Depth: 16/51 00:03:19 684mN
1.Qe6 Kh8 2.Nf5 Qg8 3.Nh6 Qxf7 4.Nxf7+ Kh7 5.Qd7 Kg8 6.Nd8 c4 7.dxc4 Rf4 8.Qxc7 Rg4+ 9.Kf2 Rf4+ 10.Ke3 Nxh4 11.Ne6 Rf3+
+- (6.56) Depth: 17/53 00:04:29 909mN
Deep Fritz 11:
1.Qe6 Kh8 2.Nf5 Rg8 3.Rxc7 Nf4 4.Qxd6 Qg6 5.Qxe5 Nxd3 6.Qc3 Nb4 7.Qxc5 Nd3 8.Qd4 Nf4 9.Kf2 a5
+- (5.63) Depth: 17/35 00:00:07 92923kN
1.Qe6 Kh8 2.Nf5 Rg8 3.Rxc7 Nf4 4.Qxd6 Qg6 5.Qxe5 Nxd3 6.Qc3 Nb4 7.Qxc5 Nd3 8.Qd4 Nf4 9.Kf2 a5
+- (5.90) Depth: 18/33 00:00:10 130mN
1.Qe6 Kh8 2.Nf5 Rg8 3.Rxc7 Nf4 4.Qxd6 Qg6 5.Qxe5 Nxd3 6.Qc3 Nb4 7.Qxc5 Nd3 8.Qd4 Nf4 9.Kf2
+- (5.90) Depth: 19/36 00:00:17 227mN
1.Qe6 Kh8 2.Nf5 Rg8 3.Rxc7 Nf4 4.Qxd6 Qg6 5.Qxe5 Nxd3 6.Qc3 Nb4 7.Qxc5 Nd3 8.Qd4 Nf4 9.Kh2 Qh7
+- (6.00) Depth: 20/36 00:00:36 474mN
1.Qe6 Kh8 2.Nf5 Rg8 3.Rxc7 Nf4 4.Nxd6 Rf8 5.Nf7+ Kg8 6.Nh6+ Kh8 7.Qd6 Ng6 8.Qxc5 gxh6 9.Rxh7+ Kxh7 10.Qa7+ Kg8
+- (7.46) Depth: 21/41 00:01:24 1106mN
-
yanquis1972
- Posts: 1766
- Joined: Wed Jun 03, 2009 12:14 am
Re: Good Test Move...
those are only with null move disabled. its a bit strange that no engines can find this quickly but in mpv some see it instantly.