Hard-Talkchess-2019 set

[zullil]

First run with Stockfish_181222_x64_modern
Conditions :
CPU : i7-6*4 GHz, 6 threads used
EGTB : 6 pieces syzygy + KRPPKRP
15 min per position
GUI : Arena 3.5.1

I plan to run 5 or 6 times.

Code: Select all

217) Qd1-g4             Bc1-d2   

Cfish-dev finds Qg4, but not in 900 seconds:

info depth 59 seldepth 82 multipv 1 score cp 201 lowerbound nodes 660130599301 nps 35718896 hashfull 1000 tbhits 0 time 18481271 pv d1g4
info depth 58 currmove d1g4 currmovenumber 1
info depth 59 seldepth 82 multipv 1 score cp 211 lowerbound nodes 670963867530 nps 35705002 hashfull 1000 tbhits 0 time 18791873 pv d1g4
info depth 57 currmove d1g4 currmovenumber 1
info depth 59 seldepth 96 multipv 1 score cp 225 lowerbound nodes 744901968430 nps 35718339 hashfull 1000 tbhits 0 time 20854888 pv d1g4
info depth 56 currmove d1g4 currmovenumber 1
info depth 59 seldepth 96 multipv 1 score cp 246 lowerbound nodes 805874681457 nps 35734740 hashfull 1000 tbhits 0 time 22551575 pv d1g4
info depth 55 currmove d1g4 currmovenumber 1
info depth 55 currmove b2b3 currmovenumber 2
info depth 55 currmove e4g5 currmovenumber 3
info depth 55 currmove e4f6 currmovenumber 4
info depth 55 currmove g1h1 currmovenumber 5
info depth 55 currmove e4d6 currmovenumber 6
info depth 55 currmove c1e3 currmovenumber 7
info depth 55 currmove d1d4 currmovenumber 8
info depth 55 currmove c1f4 currmovenumber 9
info depth 55 currmove g2h3 currmovenumber 10
info depth 55 currmove d1d5 currmovenumber 11
info depth 55 currmove d1e2 currmovenumber 12
info depth 55 currmove a2a4 currmovenumber 13
info depth 55 currmove c1d2 currmovenumber 14
info depth 55 currmove d1c2 currmovenumber 15
info depth 55 currmove g1h2 currmovenumber 16
info depth 55 currmove f2f4 currmovenumber 17
info depth 55 currmove g3g4 currmovenumber 18
info depth 55 currmove e4c3 currmovenumber 19
info depth 55 currmove d1d6 currmovenumber 20
info depth 55 currmove e1e3 currmovenumber 21
info depth 55 currmove d1d3 currmovenumber 22
info depth 55 currmove d1d2 currmovenumber 23
info depth 55 currmove e1e2 currmovenumber 24
info depth 55 currmove d1b3 currmovenumber 25
info depth 55 currmove b2b4 currmovenumber 26
info depth 55 currmove g2f3 currmovenumber 27
info depth 55 currmove e1f1 currmovenumber 28
info depth 55 currmove d1a4 currmovenumber 29
info depth 55 currmove a2a3 currmovenumber 30
info depth 55 currmove e4d2 currmovenumber 31
info depth 55 currmove g2f1 currmovenumber 32
info depth 55 currmove d1f3 currmovenumber 33
info depth 55 currmove f2f3 currmovenumber 34
info depth 55 currmove a1b1 currmovenumber 35
info depth 55 currmove g2h1 currmovenumber 36
info depth 55 currmove e4c5 currmovenumber 37
info depth 55 currmove c1g5 currmovenumber 38
info depth 55 currmove c1h6 currmovenumber 39
info depth 55 currmove d1d7 currmovenumber 40
info depth 59 seldepth 99 multipv 1 score cp 243 nodes 840863697276 nps 35750071 hashfull 1000 tbhits 0 time 23520616 pv d1g4 g8h8 c1g5 f7f5 g4f4 d7d5 e4f6 g7f6 g5f6 f8f6 e1e8 h7g8 e8g8 h8g8 f4c7 f6f7 c7c8 g8g7 c8e6 f7f6 e6e7 f6f7 e7e5 f7f6 a1e1 b8d7 e5e7 f6f7 e7e6 d7f6 e6f5 g7f8 e1e6 f6g8 f5g4 a8d8 e6c6 g8f6 g4f4 f6g8 f4d4 b7c5 d4h8 a6d3 c6h6 c5e4 h6h7 e4g5 h7f7 g5f7 h8d4 d3c4 g3g4 d8d6 b2b3 c4e2 f2f3 e2a6 g1f2 g8e7 f2g3 a6b5 f3f4 e7c6 d4d2 c6e7 a2a4 b5d7 g4g5 d7f5 g5g6 f7h6 d2d4 e7g6 h5g6 d6g6 g3f2

info depth 60 seldepth 95 multipv 1 score cp 250 nodes 1010621359731 nps 35854924 hashfull 1000 tbhits 0 time 28186403 pv d1g4 g8h8 c1g5 h6g5 e4g5 h7g8 g4h4 a6d3 h5h6 f8e8 h4d4 b8a6 d4d7 e8f8 d7d3 g7h6 g5f3 b7c5 d3c4 a6c7 c4h4 a8d8 b2b4 c5e6 h4h6 g8h7 h6f6 h8g8 f3e5 h7h8 f6h8 g8h8 e5c6 d8d2 c6a7 b6b5 g2f1 c7d5 a7b5 d5b4 e1e2 d2e2 f1e2 f8a8 a2a4 b4c2 a1c1 c2b4 c1b1 b4c6 e2d1 h8g7 g1g2 c6e5 b1c1 a8a5 c1c3 g7f6 f2f4 e5d7 c3c6 d7c5 b5c3 f6e7 c6b6 e7d7 b6b5 a5b5 a4b5 e6d4 g2f2 d7c7 f2e3

Terminating search.

[Vinvin]

First run with Stockfish_181222_x64_modern
Conditions :
CPU : i7-6*4 GHz, 6 threads used
EGTB : 6 pieces syzygy + KRPPKRP
15 min per position
GUI : Arena 3.5.1

I plan to run 5 or 6 times...

2nd run

Code: Select all

  1) Ne7-c6             Ne7xg6   
  2) Qf3xf6             Qf3xf6  * 137 Seconds
  3) Nb8-c6             Bc1-d2   
  4) e4-e5              e4-e5   * 61 Seconds
  5) b3-b4              b3-b4   * 94 Seconds
  6) Rh4xh1             Rh4-c4   
  7) Rd4-d6             Nf5-e7   
  8) Bd3xh7             Bd3xh7  * 16 Seconds
  9) Rd6xf6             Rd6xf6  * 261 Seconds
 10) g2-g4              Ra1-d1   
 11) Rg1xg7             Rg1xg7  * 547 Seconds
 12) .. Nb6-c4          Nb6-c4  * 378 Seconds
 13) Qf4-f6             Be1-d2   
 14) h2-h4              Bc1-e3   
 15) Bd3xh7             Bd3xh7  * 227 Seconds
 16) Nf3-g5             Nf3-g5  * 67 Seconds
 17) Ng3-f5             Ng3-f5  * 257 Seconds
 18) a4-a5              Rf1-d1   
 19) .. Rb8xb3, Kc3-c1  Ra6-b6   
 20) g2-g4              g2-g4   * 2 Seconds
 21) Rc1xc3             Ne5xc6   
 22) e4-e5              e4-e5   * 10 Seconds
 23) Ne2-f4             Nb3-c5   
 24) Re3-e8             Nc4-d2   
 25) Ra4-a2, Ra4-a2     Ra4-a2  * 856 Seconds
 26) Rf1xf6             Rf1xf6  * 8 Seconds
 27) Rc8xc7             Rc8xc7  * 222 Seconds
 28) Ng3-h5             Ng3-h5  * 53 Seconds
 29) Nf7-d6             Nf7-h6   
 30) f5-f6              Bh3-g4   
 31) Kd2-c1             Rc2-c6   
 32) Re1-e6             Re1-e6  * 120 Seconds
 33) Ne4-c3             h4-h5    
 34) .. Rd6-f6          Rd6-f6  * 328 Seconds
 35) Kh3-g2             Kh3-g2  * 34 Seconds
 36) Na4xb6(?)          Na4xb6   
 37) c4-c5              c4-c5   * 331 Seconds
 38) b2-b4              b2-b4   * 3 Seconds
 39) Ne5-g6             Ne5-g6  * 223 Seconds
 40) g3-g4              Ra1-a5   
 41) Qc6-f3             Qc6-f3  * 61 Seconds
 42) Qg3xe5             Qg3xe5  * 57 Seconds
 43) Rf2-f4, Rf2-f4     Rf2-f4  * 631 Seconds
 44) Bd3xh7             Bd3xh7  * 391 Seconds
 45) Kh2-g3             Kh2-g3  * 28 Seconds
 46) Rf1-f5             Rf1-f5  * 104 Seconds
 47) Rd1-g1             Rd1-g1  * 20 Seconds
 48) b4-b5              Qf2-f3   
 49) Bd5xf7             Bd5xf7  * 27 Seconds
 50) Bg5-f4             a5-a6    
 51) Bc2-a4             e5xf6    
 52) Qd8-a8             Qd8-a8  * 62 Seconds
 53) Nc2-d4             Kg2-f3   
 54) Ng5xf7             Bf5-c2   
 55) Ne3-f5             Ne3-f5  * 179 Seconds
 56) Nh3-g5             Nh3-g5  * 3 Seconds
 57) .. f4-f3           f4-f3   * 140 Seconds
 58) b2-b4              Bd4-g1   
 59) .. Qg5xg3          Qg5xg3  * 424 Seconds
 60) h4-h5              h4-h5   * 13 Seconds
 61) Bd1-b3             Bd1-b3  * 47 Seconds
 62) Rd5xc5, Qb4-h4     Qb4-h4  * 58 Seconds
 63) Rg3-g5             Rg3-g5  * 0 Seconds
 64) Kc3-d4             Kc3-d4  * 131 Seconds
 65) .. Ba6-c8          Ba6-c8  * 59 Seconds
 66) .. e5-e4           e5-e4   * 299 Seconds
 67) f3-f4              Ke8-d7   
 68) Qc7-d8             Rb6-f6   
 69) Re8xe5             Re8-c8   
 70) a7-a8B             a7-a8B  * 408 Seconds
 71) .. h7-h5           h7-h5   * 147 Seconds
 72) g5-g6              g5-g6   * 9 Seconds
 73) .. e6-e5, c3xc1    Bf8-g7   
 74) Kb7-c8             a5-a6    
 75) Qd6xe5             Qd6-a3   
 76) Bd3xg6             Bd3xg6  * 195 Seconds
 77) Bh6-g5             Bh6-g7   
 78) .. Ne7-c8, g5-g4   Re8-f8   
 79) Rg2xg7             Rg1-e1   
 80) Ne4xf6             Ne4xf6  * 4 Seconds
 81) Qe2-h5             Qe2-h5  * 10 Seconds
 82) Ng7-f5             Ng7-f5  * 16 Seconds
 83) Qh4-g4             Qh4-h3   
 84) .. Bg5-h4          Bg5-h4  * 12 Seconds
 85) d4-d5              d4-d5   * 100 Seconds
 86) Rd3xb3             Rd3xb3  * 32 Seconds
 87) h5-h6              h5-h6   * 83 Seconds
 88) c2-c4              c2-c4   * 22 Seconds
 89) c7-c8N             Kf3-g2   
 90) Ne3-f5             Ne3-f5  * 3 Seconds
 91) Qf5-e6             Qf5-e6  * 2 Seconds
 92) .. Re2xd2          Re2xg2   
 93) e4-e5              e4-e5   * 1 Second
 94) Bd6-f8             Rg8-f8   
 95) Kg3-h2             Kg3-h2  * 0 Seconds
 96) Be3xc5             Kb7-b6   
 97) .. Bb7-d5          Bb7-d5  * 17 Seconds
 98) Nc6xe7             Rc1-c3   
 99) b3-b4              b3-b4   * 632 Seconds
100) Kg2-f3             Kg2-f3  * 117 Seconds
101) Nc3-d5             Nc3-d5  * 79 Seconds
102) a7-a8Q, a7-a8R     a7-a8Q  * 119 Seconds
103) .. Qh5-f5          g4xh3    
104) .. Re3xf3          Re3xf3  * 380 Seconds
105) .. Qd3xg3          Qd3xg3  * 681 Seconds
106) a5-a6              a5-a6   * 62 Seconds
107) Kh4-h5             Kh4-h5  * 478 Seconds
108) h5xg6              Nd6-b7   
109) Qa3-h3             Qa3-h3  * 779 Seconds
110) b7-b8R             b7-b8R  * 17 Seconds
111) Ne7-c8             Ne4-g5   
112) .. Rd7xd4, Kc3-c1  Rd7xd4  * 5 Seconds
113) h2-h3              Bc3-e1   
114) Be2-h5             Nh3xf2   
115) Bc4-e2             Bc4-e2  * 366 Seconds
116) Kf2-e1             Kf2-e1  * 177 Seconds
117) .. e4-e3           e4-e3   * 27 Seconds
118) Rf1-c1             Rf1-c1  * 34 Seconds
119) Ng4-f6             Ng4xe3   
120) Ne5xd3             Ne5xd3  * 30 Seconds
121) Rf4-g4             Rf4-g4  * 30 Seconds
122) Nf4-d3             Nf4-d3  * 176 Seconds
123) .. Rc5-b5(?)       Rc5-c4  * 132 Seconds
124) .. Re7-a7          Re7-a7  * 73 Seconds
125) h4-h5              e5-e6    
126) c3-c4              c3-c4   * 10 Seconds
127) Na5-b3             Na5-b3  * 52 Seconds
128) .. Bf5-h3, Bc3-c1  Bf5-h3  * 72 Seconds
129) Ke5-f6             Qf3-f8   
130) Ke2-d3             Ke2-d3  * 76 Seconds
131) Rf1-b1             Rf1-b1  * 32 Seconds
132) g3-g4              Bf2-d4   
133) Nd4-c6             g7-g8Q   
134) .. Nb6xc4          Nb6xc4  * 116 Seconds
135) Re5xf5             Re2-a2   
136) Bg2-e4             Bg2-e4  * 0 Seconds
137) f2-f4              Na8-c7   
138) Na8-c7             Rh5xh6   
139) .. d4-d3           d4-d3   * 29 Seconds
140) .. Qe4xc4          Qe4xc4  * 43 Seconds
141) .. Re7-e4          Ka8-b7   
142) Bh5-f3             Bh5-f3  * 208 Seconds
143) Rh1-h6             Rh1-h6  * 555 Seconds
144) Bd8-c7             g6xh7    
145) Kb5-a6             Kb5-a6  * 699 Seconds
146) Qh4-d4             Qh4-d4  * 0 Seconds
147) .. Ne8-c7          Ne8-c7  * 37 Seconds
148) Be3-d4             Be3-d4  * 0 Seconds
149) c4-c5              b4-b5    
150) Ra3-c3             Ra3xa7   
151) Bf1-e2             Bf1-e2  * 45 Seconds
152) Re1xe7             Re1xe7  * 115 Seconds
153) Bg5-f6             Bg5-f6  * 235 Seconds
154) Rd1-d8             Rd1-d8  * 53 Seconds
155) Rd1-d8             Kc1-b1   
156) Rd1-d8             Rd1-d8  * 171 Seconds
157) Bg5-f6             Bg5-f6  * 3 Seconds
158) Be4-g6             Be4-d3   
159) Bd3xh7             Nd4xc6   
160) Bd3xh7             Bd3xh7  * 7 Seconds
161) Bd4-f6             Qh5-h6   
162) Bd3xh7             Bd3xh7  * 18 Seconds
163) Nd4-f3             Nd4-f3  * 214 Seconds
164) Bd3-g6             Bd3-g6  * 12 Seconds
165) f4-f5              f4-f5   * 75 Seconds
166) Kg1-f2, ...        Kg1-f2  * 94 Seconds
167) g3-g4              Rh1-h3   
168) Bd3xh7             Bd3xh7  * 10 Seconds
169) Ne4-g5             Ne4-g5  * 40 Seconds
170) Bd3xh7             Bd3xh7  * 8 Seconds
171) Rh1xh7             Rh1xh7  * 124 Seconds
172) Qe2xe8             Qe2xe8  * 81 Seconds
173) b6-b7              b6-b7   * 155 Seconds
174) Nf8-g6             Nf8-g6  * 185 Seconds
175) Nd5-f6             Nd5-f6  * 261 Seconds
176) Nd5-f6             Nd5-f6  * 149 Seconds
177) f5-f6              Rb1-b2   
178) Bd3xh7             Bd3xh7  * 724 Seconds
179) Nd4-f5             Rh4-f4   
180) Qf3-f6             Qf3-f6  * 787 Seconds
181) Qf3-f6             Qf3-f6  * 102 Seconds
182) Rd1-d3             Rd1-d3  * 137 Seconds
183) Qg5-h6             Qg5-h6  * 13 Seconds
184) g2-g4              g2-g4   * 273 Seconds
185) Nd4-c6             Nd4-c6  * 24 Seconds
186) d5-d6              d5-d6   * 111 Seconds
187) Nf3-h4             Qd1xe1   
188) Bc1-g5             Bc1-g5  * 894 Seconds
189) .. Rd8xd4          Rd8xd4  * 70 Seconds
190) .. O-O-O           O-O-O   * 122 Seconds
191) Ng3-h5, Ng3-h5     Ra1-c1   
192) g2-g4              g2-g4   * 7 Seconds
193) .. Kg8-g7          Kg8-g7  * 217 Seconds
194) Rf3-f6             Rf3-f6  * 77 Seconds
195) Bd3xh7             Bd3xh7  * 9 Seconds
196) Ba4xc6             Ba4xc6  * 135 Seconds
197) Rd3-h3             Rd3-h3  * 16 Seconds
198) Rd6xf6             Rd6xf6  * 3 Seconds
199) Qf3xf4             Qf3xf4  * 127 Seconds
200) Qe2-h5             Nf5xe7   
201) Bd3xh7             Bd3xh7  * 60 Seconds
202) Qe2xd2, Ne5-g4     Ne5-g4  * 129 Seconds
203) .. Ra8-e8          Ra8-e8  * 6 Seconds
204) .. c3xb2, c3xc1    c3xb2   * 25 Seconds
205) .. e4-e3           e4-e3   * 18 Seconds
206) .. Rh6xh2          Kg8-h8   
207) Nc3-d5             Nc3-d5  * 627 Seconds
208) .. Bd7-h3          Bd7-h3  * 1 Second
209) .. Qb2-c2, c3-c1   Qb2-c2  * 91 Seconds
210) Ne7-d5             Ne7-d5  * 35 Seconds
211) d5-d6              d5-d6   * 44 Seconds
212) Bd3xh7             Bd3xh7  * 173 Seconds
213) e5-e6              e5-e6   * 52 Seconds
214) Be3-d4             Be3-d4  * 286 Seconds
215) Bc1-g5             b2-b4    
216) Rf1-f6             Rf1-f6  * 228 Seconds
217) Qd1-g4             Qd1-g4  * 2 Seconds
218) c3-c4              Rd1-d6   
219) Bd3xh7             O-O      
220) Qd1-h5             Qd1-h5  * 76 Seconds
221) Qd1-f3             Qd1-f3  * 12 Seconds
222) Qe3-d3             Qe3-d3  * 26 Seconds
223) Ng5xf7, Ng5xf7     Ng5xf7  * 200 Seconds

[zullil]

First run with Stockfish_181222_x64_modern
Conditions :
CPU : i7-6*4 GHz, 6 threads used
EGTB : 6 pieces syzygy + KRPPKRP
15 min per position
GUI : Arena 3.5.1

I plan to run 5 or 6 times...

2nd run

Code: Select all

217) Qd1-g4             Qd1-g4  * 2 Seconds

This is certainly dubious. Probably Stockfish briefly considers Qg4 early in its search, but then leaves it in favor of b3. As does Cfish-dev here:

info depth 30 currmove d1g4 currmovenumber 3
info depth 30 seldepth 43 multipv 1 score cp 10 lowerbound nodes 131334819 nps 32111202 hashfull 31 tbhits 0 time 4090 pv d1g4
info depth 29 currmove d1g4 currmovenumber 1
info depth 30 seldepth 43 multipv 1 score cp 19 lowerbound nodes 147254105 nps 32046595 hashfull 32 tbhits 0 time 4595 pv d1g4
info depth 28 currmove d1g4 currmovenumber 1
info depth 30 seldepth 43 multipv 1 score cp 34 lowerbound nodes 155893430 nps 32017545 hashfull 33 tbhits 0 time 4869 pv d1g4
info depth 27 currmove d1g4 currmovenumber 1
info depth 30 seldepth 43 multipv 1 score cp 54 lowerbound nodes 165654158 nps 32029032 hashfull 35 tbhits 0 time 5172 pv d1g4
info depth 26 currmove d1g4 currmovenumber 1
info depth 26 currmove e4d6 currmovenumber 2
info depth 26 currmove e4f6 currmovenumber 3
info depth 26 currmove g1h2 currmovenumber 4
info depth 26 currmove c1f4 currmovenumber 5
info depth 26 currmove c1e3 currmovenumber 6
info depth 26 currmove b2b3 currmovenumber 7
info depth 26 currmove e4c3 currmovenumber 8
info depth 26 currmove g1h1 currmovenumber 9
info depth 26 currmove d1d6 currmovenumber 10
info depth 26 currmove a2a4 currmovenumber 11
info depth 26 currmove b2b4 currmovenumber 12
info depth 26 currmove e1f1 currmovenumber 13
info depth 26 currmove g2h3 currmovenumber 14
info depth 26 currmove e1e3 currmovenumber 15
info depth 26 currmove d1a4 currmovenumber 16
info depth 26 currmove c1d2 currmovenumber 17
info depth 26 currmove d1b3 currmovenumber 18
info depth 26 currmove d1f3 currmovenumber 19
info depth 26 currmove e4d2 currmovenumber 20
info depth 26 currmove e1e2 currmovenumber 21
info depth 26 currmove e4g5 currmovenumber 22
info depth 26 currmove f2f3 currmovenumber 23
info depth 26 currmove g2f3 currmovenumber 24
info depth 26 currmove g2f1 currmovenumber 25
info depth 26 currmove d1d5 currmovenumber 26
info depth 26 currmove d1c2 currmovenumber 27
info depth 26 currmove d1d2 currmovenumber 28
info depth 26 currmove d1d4 currmovenumber 29
info depth 26 currmove d1e2 currmovenumber 30
info depth 26 currmove a2a3 currmovenumber 31
info depth 26 currmove g3g4 currmovenumber 32
info depth 26 currmove f2f4 currmovenumber 33
info depth 26 currmove a1b1 currmovenumber 34
info depth 26 currmove c1g5 currmovenumber 35
info depth 26 currmove d1d3 currmovenumber 36
info depth 26 currmove e4c5 currmovenumber 37
info depth 26 currmove g2h1 currmovenumber 38
info depth 26 currmove c1h6 currmovenumber 39
info depth 26 currmove d1d7 currmovenumber 40
info depth 30 seldepth 43 multipv 1 score cp 59 nodes 267375988 nps 32128813 hashfull 54 tbhits 0 time 8322 pv d1g4 g8h8 b2b4 d7d5 e4c3 a6c4 c1f4 h7g8 e1e7 b7d8 b4b5 f8e8 e7e8 g8e8 b5c6 d8c6 c3d5 c4d5 g2d5 b8a6 a1d1 a6b4 d5g2 a8d8 d1d8 e8d8 g4f5 c6d4 f5f7 d4e2 g1h2 e2f4 g3f4

info depth 31 seldepth 48 multipv 1 score cp 82 nodes 684721724 nps 32376080 hashfull 142 tbhits 0 time 21149 pv b2b3 d7d5 c1a3 h7f5 a3f8 g8f8 e4c3 b7c5 e1e3 b8d7 b3b4 d7f6 b4c5 f6g4 d1f3 f5h5 e3e2 h5h2 g1f1 h2h5 f3f4 a6e2 c3e2 f8g8 c5b6 a7b6 e2d4 g4e5 f4e3 e5c4 e3e2 h5e5 e2e5 c4e5 f2f4 a8a4 f4e5 a4d4 a1c1

...

info depth 59 seldepth 82 multipv 1 score cp 201 lowerbound nodes 660130599301 nps 35718896 hashfull 1000 tbhits 0 time 18481271 pv d1g4
info depth 58 currmove d1g4 currmovenumber 1
info depth 59 seldepth 82 multipv 1 score cp 211 lowerbound nodes 670963867530 nps 35705002 hashfull 1000 tbhits 0 time 18791873 pv d1g4
info depth 57 currmove d1g4 currmovenumber 1
info depth 59 seldepth 96 multipv 1 score cp 225 lowerbound nodes 744901968430 nps 35718339 hashfull 1000 tbhits 0 time 20854888 pv d1g4
info depth 56 currmove d1g4 currmovenumber 1
info depth 59 seldepth 96 multipv 1 score cp 246 lowerbound nodes 805874681457 nps 35734740 hashfull 1000 tbhits 0 time 22551575 pv d1g4

[Dann Corbit]

Does anyone have a mechanical solution (using computer only, but possibly with forward/backward analysis etc.) for these two:

[d]2bqrr1k/p5b1/1p1p2pp/nPpBp3/P1P1N2P/3PN1P1/R4P1K/3Q1R2 w - -

[d]7q/b1p5/1p1Npkb1/pPP2ppP/P1P5/3B2P1/5P1R/K3R3 w - -

[zullil]

Does anyone have a mechanical solution (using computer only, but possibly with forward/backward analysis etc.) for these two:

[d]2bqrr1k/p5b1/1p1p2pp/nPpBp3/P1P1N2P/3PN1P1/R4P1K/3Q1R2 w - -

Direct search from root, so far:

info depth 71 seldepth 79 multipv 1 score cp 247 nodes 2085864888500 nps 36085450 hashfull 1000 tbhits 0 time 57803487 pv h4h5 g6g5 e4c3 c8e6 d5e6 e8e6 c3d5 f8f7 h2g2 e6e8 g3g4 e8f8 f1e1 h8g8 a2e2 d8d7 e3f5 g8h8 e2a2 f8e8 d5e3 a5b7 d1f3 b7a5 f3d5 e8e6 d5e4 e6e8 e3d5 e8f8 g2g1 a5b3 d5e3 d7e6 e1b1 b3a5 a2d2 e6d7 d2d1 f8e8 d1e1 e8f8 e4f3 d7e6 e3d5 h8g8 f3e4 e6d7 e1e3 g8h8 e3f3 d7d8 b1b2 d8d7 f3h3 a5b7 b2a2 b7a5 a2a3 d7e6 e4e2 f8d8 h3g3 e6d7 e2e4 d8f8 g1g2 d7d8 g3f3 d8d7 g2g3 d7d8 f3e3 d8d7 e3e1 a5b7 g3g2

[Paloma]

2nd run
....

1st run . .164 solutions
2nd run . 153 solutions

[peter]

Hi Dann!

Does anyone have a mechanical solution (using computer only, but possibly with forward/backward analysis etc.) for these two:

[d]2bqrr1k/p5b1/1p1p2pp/nPpBp3/P1P1N2P/3PN1P1/R4P1K/3Q1R2 w - -

[d]7q/b1p5/1p1Npkb1/pPP2ppP/P1P5/3B2P1/5P1R/K3R3 w - -

For the Kasparov- Karpov- position there are several moves probably winning, 38.Nc3 having the edge, so I did some FW- BW of some lines and did let CFish at 16MV compute for about 2 hours, pity I don't remember the depths, shouldn't have used Fritz- GUI and instead used English abbrevations, but here's the output:

[d]2bqrr1k/p5b1/1p1p2pp/nPpBp3/P1P1N2P/3PN1P1/R4P1K/3Q1R2 w - - 0 1
Analysis by Cfish 241218 64 POP N:

Code: Select all

1. +-  (2.68): 38.Sc3 Kh7 39.Th1 Lb7 40.h5 g5 41.Le4+ Kh8 42.Scd5 Lc8 43.Lg6 Dd7 44.Kg1 Td8 45.g4 Lb7 46.Lf5 De8 47.Th3 Tb8 48.Le4 Dd7 49.Kg2 Dd8 50.Tf3 Dd7 51.Lf5 Dd8 52.Kg1 Tf7 53.Kh2 Tf6 54.Te2 Df8 55.Kg2 Tf7 56.Ta2 Te8 57.Th3 Tb8 58.Le4 Tf4 59.Sxf4 Lxe4+ 60.dxe4 exf4 61.Sf5 Sxc4 62.Dd5 Se5 63.f3 
2. +-  (2.37): 38.h5 g5 39.g4 Lb7 40.Kg2 Lc8 41.f3 Te7 42.Th1 Tf4 43.Tg1 Tf8 44.Ta3 Tf4 45.Tf1 Te8 46.Sg3 Ld7 47.De2 Tef8 48.Kg1 Lc8 49.Se4 Te8 50.Tf2 Dc7 51.Kg2 Tef8 52.Dd1 Dd8 53.Kg1 Dd7 54.Tf1 Td8 55.Kg2 Dc7 56.De2 Ld7 57.Tf2 Tff8 58.Dd1 Tf4 59.Kg1 Lc8 60.Taa2 De7 61.Kg2 Tff8 62.Ta3 Tde8 
3. +-  (2.37): 38.Kg1 Dd7 39.g4 Lb7 40.f3 Lc8 41.h5 g5 42.Ta3 Tf4 43.Dc2 Dc7 44.Ta2 Tef8 45.Dd1 Te8 46.Kh2 Dd8 47.Kg2 Tff8 48.Ta3 Te7 49.Sc3 Tc7 50.Kg1 Te7 51.Le4 Le6 52.Kg2 Tc7 53.De2 De8 54.Ld5 Lc8 55.Se4 Dd8 56.Sg3 Te7 57.Te1 Tc7 58.Sgf5 Tf6 59.Dd1 Tf8 60.Dc2 Tf6 61.De2 Tf8 62.Sg3 Tf6 63.Dd1 
4. +-  (2.37): 38.Kg2 Dd7 39.h5 g5 40.g4 Dd8 41.f3 Te7 42.Th1 Tf4 43.Tg1 Tf8 44.Ta3 Tf4 45.Tf1 Te8 46.Sg3 Ld7 47.De2 Tef8 48.Kg1 Lc8 49.Se4 Te8 50.Tf2 Dc7 51.Kg2 Tef8 52.Dd1 Dd8 53.Kg1 Dd7 54.Tf1 Td8 55.Kg2 Dc7 56.De2 Ld7 57.Kg1 Te8 58.Kh2 Td8 59.Sg3 Lc8 60.Kg2 Tff8 61.Dd1 Tde8 62.Sgf5 Dd7 
5. +-  (2.37): 38.Th1 Dd7 39.Kg2 Te7 40.h5 g5 41.g4 Dd8 42.Te1 Dd7 43.Sg3 Dc7 44.Sgf5 Tee8 45.Kg1 Dd8 46.Le4 Tf7 47.Sd5 Tef8 48.Sfe3 Lb7 49.Lf5 Da8 50.Lg6 Tf4 51.Le4 T4f7 52.Tf1 Dd8 53.Lg6 Tf3 54.Kg2 Lc8 55.Le4 T3f7 56.f3 Le6 57.Ta3 Tb7 58.Sc3 Tc7 59.Ld5 Lc8 60.Te1 Te7 61.De2 Ld7 62.Se4 Dc7 63.Th1 Db8 64.Tf1 Dc7 
6. +-  (2.37): 38.Td2 Dd7 39.h5 g5 40.Ta2 Td8 41.g4 Lb7 42.f3 Lc8 43.Ta3 Tf4 44.Kg2 Dc7 45.De2 Ld7 46.Kg1 Te8 47.Sg3 Tff8 48.Sgf5 Lc8 49.Kg2 Dd8 50.Kh1 Dd7 51.Sg3 Dc7 52.Kg2 Ld7 53.Se4 Lc8 54.Kh2 Tf4 55.Dg2 Td8 56.Kg1 Ld7 57.Dd2 Te8 58.De2 Td8 59.Dd1 Tff8 60.Kg2 Lc8 61.Ta2 De7 62.Kg1 Tde8 63.Kh1 Dd8 64.Kg2 
7. +-  (2.37): 38.Kh1 De7 39.h5 g5 40.g4 Tf4 41.f3 Tff8 42.Kh2 Ld7 43.Kg2 Tf4 44.Sg3 Dd8 45.Le4 Le6 46.Ta3 Tef8 47.Ld5 Ld7 48.Se4 Dc7 49.Ta2 Lc8 50.Kg1 Te8 51.Kh2 Dd8 52.Kg2 Tff8 53.Ta3 Te7 54.Sc3 Tc7 55.Te1 Te7 56.De2 Ld7 57.Se4 Dc7 58.Th1 Db8 59.Tf1 Dc7 60.Kg1 Tee8 61.Tf2 Db8 62.Kg2 Lc8 63.Kh1 
8. +-  (2.37): 38.Te2 Dd7 39.h5 g5 40.Ta2 Td8 41.g4 Lb7 42.f3 Lc8 43.Ta3 Tf4 44.Kg2 Dc7 45.De2 Ld7 46.Kg1 Te8 47.Sg3 Tff8 48.Sgf5 Lc8 49.Kg2 Dd8 50.Kh1 Dd7 51.Sg3 Dc7 52.Kg2 Ld7 53.Se4 Lc8 54.Kh2 Tf4 55.Dg2 Td8 56.Kg1 Ld7 57.Dd2 Te8 58.De2 Td8 59.Dd1 Tff8 60.Kg2 Lc8 61.Ta2 De7 62.Kg1 Tde8 63.Tff2 Td8 
9. +-  (2.37): 38.Te1 Dd7 39.h5 g5 40.Tf1 Td8 41.g4 Lb7 42.f3 Lc8 43.Ta3 Tf4 44.Kg2 Dc7 45.De2 Ld7 46.Kg1 Te8 47.Sg3 Tff8 48.Sgf5 Lc8 49.Kg2 Dd8 50.Kh1 Dd7 51.Sg3 Dc7 52.Kg2 Ld7 53.Se4 Lc8 54.Kh2 Tf4 55.Dg2 Td8 56.Kg1 Ld7 57.Dd2 Te8 58.De2 Td8 59.Dd1 Tff8 60.Kg2 Lc8 61.Ta2 De7 62.Kg1 Tde8 63.Th2 Dd8 
10. +-  (2.37): 38.Tb2 Dd7 39.h5 g5 40.Ta2 Td8 41.g4 Lb7 42.f3 Lc8 43.Ta3 Tf4 44.Kg2 Dc7 45.De2 Ld7 46.Kg1 Te8 47.Sg3 Tff8 48.Sgf5 Lc8 49.Kg2 Dd8 50.Kh1 Dd7 51.Sg3 Dc7 52.Kg2 Ld7 53.Se4 Lc8 54.Kh2 Tf4 55.Dg2 Td8 56.Kg1 Ld7 57.Dd2 Te8 58.De2 Td8 59.Dd1 Tff8 60.Kg2 Lc8 61.Ta2 De7 62.Kg1 Tde8 63.Ta3 
11. +-  (2.37): 38.Sg2 Dd7 39.h5 g5 40.Se3 Td8 41.g4 Lb7 42.f3 Lc8 43.Ta3 Tf4 44.Kg2 Dc7 45.De2 Ld7 46.Kg1 Te8 47.Sg3 Tff8 48.Sgf5 Lc8 49.Kg2 Dd8 50.Kh1 Dd7 51.Sg3 Dc7 52.Kg2 Ld7 53.Se4 Lc8 54.Kh2 Tf4 55.Dg2 Td8 56.Kg1 Ld7 57.Dd2 Te8 58.De2 Td8 59.Dd1 Tff8 60.Kg2 Lc8 61.Ta2 De7 62.Kg1 Tde8 63.Ta3 
12. +-  (2.37): 38.Ta1 Te7 39.h5 g5 40.Ta2 Dd7 41.Kg1 Sb7 42.g4 Dd8 43.Te1 Tf4 44.f3 Sa5 45.Kg2 Te8 46.Tf1 Tff8 47.Ta3 Te7 48.Sc3 Tc7 49.Te1 Te7 50.De2 Ld7 51.Se4 Dc7 52.Th1 Db8 53.Tf1 Dc7 54.Kg1 Tee8 55.Tf2 Db8 56.Kg2 Tf4 57.Dd1 Tef8 58.Tf1 Te8 59.Kg1 Tff8 60.Sg3 Tf6 61.De2 Tff8 62.Sgf5 Lxf5 63.Sxf5 
13. +-  (2.37): 38.Ta3 Dd7 39.h5 g5 40.g4 Lb7 41.f3 Te7 42.De2 Lc8 43.Kg1 Dd8 44.Te1 Tf4 45.Sc3 Tf8 46.Kg2 Ld7 47.Se4 Dc7 48.Th1 Db8 49.Tf1 Dc7 50.Kg1 Tee8 51.Tf2 Db8 52.Kg2 Tf4 53.Dd1 Tef8 54.Tf1 Te8 55.Kg1 Tff8 56.Sg3 Tf6 57.De2 Tff8 58.Sgf5 Tf6 59.Kg2 Tff8 60.Te1 Dc7 61.Kh2 Lc8 62.Tf1 Ld7 63.Kg1 Lc8 
14. +-  (2.37): 38.Db1 Dd7 39.h5 g5 40.Dd1 Td8 41.g4 Lb7 42.f3 Lc8 43.Ta3 Tf4 44.Kg2 Dc7 45.De2 Ld7 46.Kg1 Te8 47.Sg3 Tff8 48.Sgf5 Lc8 49.Kg2 Dd8 50.Kh1 Dd7 51.Sg3 Dc7 52.Kg2 Ld7 53.Se4 Lc8 54.Kh2 Tf4 55.Dg2 Td8 56.Kg1 Ld7 57.Dd2 Te8 58.De2 Td8 59.Dd1 Tff8 60.Kg2 Lc8 61.Ta2 De7 62.Te2 Le6 63.Lxe6 Dxe6 64.Sd5 
15. +-  (2.37): 38.f3 Dd7 39.g4 Dd8 40.Kg1 Tf4 41.h5 g5 42.Te1 Tef8 43.Kg2 Ld7 44.Tf1 Dc7 45.Kh1 Te8 46.Taf2 Tff8 47.Kh2 Tf4 48.Kg1 Tb8 49.Ta2 Tff8 50.Tff2 Tbd8 51.Ta3 Tf4 52.Tf1 Tff8 53.Kg2 Lc8 54.Ta2 De7 55.Sg3 Dc7 56.Sgf5 Tde8 57.Th1 Ld7 58.Te1 Lc8 59.Tf2 Dd8 60.Tef1 Tf6 61.Sg3 Tff8 62.Se4 Tf4 63.Ta2 
16. +-  (2.37): 38.Sd2 Dd7 39.Le4 Dh3+ 40.Kg1 De6 41.h5 g5 42.g4 Td8 43.Ld5 Dd7 44.Se4 Tf4 45.f3 De7 46.Kg2 Tff8 47.Te2 Tde8 48.Tef2 Td8 49.Ta2 Dd7 50.Te1 De7 51.Sg3 Dc7 52.Sgf5 Tde8 53.Tf2 Db8 54.Tee2 Dc7 55.Kg1 Dd7 56.Kh2 Dc7 57.Tf1 Tf6 58.Sg3 Tef8 59.Ta2 Tf4 60.Se4 Te8 61.Ta3 Ld7 62.Kg2 Lc8 63.Tf2 

And here is, what I've stored about the game in my database:
[pgn]
[Event "World Championship 34th-KK4 VL CCC 38."]
[Site "Sevilla"]
[Date "1987.??.??"]
[Round "8"]
[White "Kasparov, Gary"]
[Black "Karpov, Anatoly"]
[Result "1-0"]
[ECO "A36"]
[WhiteElo "2000"]
[BlackElo "2000"]
[Annotator "Martan,Peter"]
[PlyCount "99"]
[EventDate "1987.??.??"]
[TimeControl "60"]

1. c4 e5 2. Nc3 d6 3. g3 c5 4. Bg2 Nc6 5. a3 g6 6. b4 Bg7 7. Rb1 Nge7 8. e3 O-O
9. d3 Rb8 10. Nge2 Be6 11. b5 Na5 12. Bd2 b6 13. O-O Nb7 14. e4 Kh8 15. Qc1 f5
16. Bg5 Qe8 17. Bxe7 Qxe7 18. exf5 Bxf5 19. Nd5 Qd7 20. Qd2 Na5 21. Nec3 Rbe8
22. Ne4 Nb7 23. a4 Na5 24. h4 Nb7 25. Kh2 Rb8 26. Ra1 Na5 27. Ra3 Rf7 28. Qc3
Rd8 29. Ra2 Bh6 30. Ng5 Rff8 31. Re2 Bg7 32. Qc2 Rde8 33. Ne3 Bh6 34. Bd5 Bg7
35. Qd1 h6 36. Ne4 Qd8 37. Ra2 Bc8 38. Nc3 (38. h5 $5 g5 39. g4 Qe7 40. Kg1 Rf4
41. f3 Rff8 42. Ng3 Qd8 43. Kg2 Bd7 44. Kh1 Bc8 45. Nef5 Kh7 {[%eval 125,37] SE
}) (38. Kg1 $6 Qe7 (38... Re7 39. Nc3 Qe8 40. Be4 Bf5 41. Kg2 h5 42. Nxf5 gxf5
43. Bf3 {[%eval 154,39]}) 39. Nc3 Bh3 (39... Rd8 40. Be4 Qe6 41. Ncd5 {[%eval
179,35]}) 40. Bg2 Bxg2 41. Kxg2 e4 42. Nxe4 Nxc4 43. Nxc4 d5 44. Ned6 Rd8 45.
Re2 {[%eval 158,33]}) 38... h5 (38... e4 39. Nxe4 Qd7 (39... Bd4 {[%eval 254,
32]}) 40. Rh1 Bd4 41. Re2 Re5 (41... Qe7 {[%eval 220,30]}) 42. Kg2 $1 {[%eval
240,31]} (42. Qf1 $2 {Mike Liban} Rh5 $6 (42... Bxe3 {[%eval 118,31]}) 43. Qg2
$2 (43. Qd1 {[%eval 243,30]}) 43... g5 44. Kg1 g4 45. Qf1 Bb7 $6 (45... Bxe3 {
[%eval 140,31]}) 46. Bxb7 Nxb7 47. Nd5 (47. Qd1 {[%eval 164,33]}) 47... Nd8 48.
Qd1 Rhf5 49. a5 bxa5 50. Ra2 Rf3 51. Kg2 Qh7 52. Re1 {[%eval 0,38]}) 42... h5 (
42... Ree8 {[%eval 285,32]}) 43. f4 Re7 44. Ree1 Kg7 45. Nc2 Bf6 46. Nxf6 Rxf6
47. Rxe7+ Qxe7 48. Re1 Be6 49. Ne3 Qf8 50. Re2 {[%eval 527,32]}) (38... Qf6 39.
Be4 Rd8 40. Ncd5 Qe6 41. Kg1 $1 (41. h5 $2 g5 {[%eval 133,34]}) (41. Re2 Rd7
42. Kg1 {[%eval 181,34]} Rdf7 43. f4 {[%eval 210,34] thematische ZUS}) (41. Kg2
$6 h5 42. Kg1 {3Eck} Bb7 43. Re2 {[%eval 181,31]}) 41... Bb7 42. Re2 Rf7 (42...
Rd7 43. f4 {[%eval 246,31]}) 43. f4 Nxc4 44. dxc4 exf4 45. Nc2 Qg4 46. Qd3 Bxd5
47. Bxd5 Rff8 48. Re4 Qxg3+ 49. Qxg3 fxg3 50. Rg4 {[%eval 369,34]}) (38... Qd7
39. Be4 Qf7 (39... Qe6 40. Ncd5 Rf7 (40... Rd8 41. f3 Rg8 (41... Qh3+ 42. Kg1
Bb7 43. h5 {[%eval 406,30]} (43. Rh2 {VL})) 42. Kg1 {[%eval 210,30]}) 41. h5 {
[%eval 195,34]}) 40. Ncd5 Bf5 41. h5 Bxe4 42. dxe4 g5 43. Rd2 (43. Kg2 Kh7 44.
Ra3 Rd8 45. Qe2 Qe6 46. Rd1 Rd7 47. Rc3 {[%eval 200,44]} (47. Nf5 {VL})) 43...
Qd7 44. Kg2 Rf7 45. Rh1 {[%eval 200,42]}) (38... Qe7 39. Be4 Qe6 (39... Bf5 40.
Ncd5 {[%eval 199,31]}) 40. Ncd5 Rf7 41. h5 {[%eval 196,36]} (41. f3 {VL})) (
38... Kh7 39. Be4 Bf5 40. Kg2 Qd7 41. h5 Bxe4+ 42. dxe4 Qf7 43. Rh1 g5 44. Ncd5
Rd8 45. Rf1 {[%eval 343,45]}) 39. Be4 Re6 40. Ncd5 $6 (40. f3 $1 Bh6 (40... Bb7
41. Rg2 {[%eval 206,31]}) (40... g5 41. Bf5 {[%eval 216,30]}) 41. Ned5 Kg7 (
41... Bb7 42. Rg2 {[%eval 225,30]} Kg7 (42... Rf7 43. Kh1 Bg7 {[%eval 252,30]}
(43... Rf8 $2 {LT} 44. f4 {[%eval 400,40]} exf4 45. gxf4 Rg8 (45... Bxd5 46.
Nxd5 Rg8 (46... Nxc4 47. Bxg6 Qxh4+ 48. Rh2 Qg4 49. Qxg4 hxg4 50. Rxh6+ {
[%eval 666,36]}) 47. Qf3 Nb3 48. Qh3 Nd4 49. Rfg1 Rg7 50. Bxg6 {[%eval 666,40]}
) (45... Nxc4 46. dxc4 Bxd5 47. cxd5 {[%eval 601,34]} (47. cxd5 {[%eval 601,34]
})) 46. f5 Bxd5 (46... Re5 47. f6 Bc8 (47... Qd7 $2 48. f7 {[%eval 1468,26]}) (
47... Qf8 48. Bxg6 {[%eval 806,32]}) (47... Bxd5 48. Bxd5 {[%eval 836,28]}) 48.
f7 Rf8 49. Rf6 Bg7 50. Rgxg6 {[%eval 804,37]}) (46... gxf5 47. Bxf5 Rxg2 48.
Kxg2 Qg8+ 49. Kh2 Qf7 50. Bxe6 {[%eval 818,31]}) 47. Bxd5 Re3 48. f6 Rh3+ (
48... Nxc4 49. Bxc4) 49. Rh2 Rxh2+ (49... Qc8 50. Bxg8) 50. Kxh2 {[%eval 762,
42]} Rf8 {[%eval 757,45]}) (43... Rg7 44. f4 exf4 45. gxf4 Bc8 46. Rgf2 Rg8 47.
f5 Re5 48. f6 Bg4 49. Qc2 Qd7 50. Ne7 {[%eval 568,32]}) 44. g4 Qxh4+ 45. Rh2 {
[%eval 372,35]}) 43. Kh1 {[%eval 247,38]} Ree8 44. g4 Qxh4+ 45. Rh2 Qd8 46. Rg1
Re6 (46... Bf4 47. Nxf4 Rxf4 48. gxh5 g5 49. Bxb7 Nxb7 50. Ne4 {[%eval 406,33]}
) 47. g5 $1 (47. gxh5 $6 g5 {[%eval 221,33]}) (47. Rgg2 $6 Kg8 (47... Rf7 48.
Rh3 {[%eval 328,30]}) (47... Kf7 48. gxh5 {[%eval 348,31]}) (47... Bf4 48. Nxf4
Rxf4 49. Nd5) 48. gxh5 g5 49. Ne3 Kg7 50. Ng4 {[%eval 336,30]}) 47... Bxg5 (
47... Rg8 48. gxh6+ {[%eval 859,33]}) 48. Rhg2 Bf4 (48... Rf4 49. Nxf4 {[%eval
729,33]}) (48... Bxd5 49. cxd5 {[%eval 720,35]}) 49. Rxg6+ Rxg6 (49... Kh8 50.
Qe1 {[%eval 775,33]}) 50. Rxg6+ {[%eval 777,41]}) (41... Bd7 42. Raf2 {[%eval
205,31]}) 42. Rg2 Bd7 (42... Rg8 {[%eval 215,32]}) (42... Ree8 {[%eval 213,33]}
) 43. Rh1 Kh8 44. g4 {[%eval 224,33]}) 40... Bh6 41. Ng2 $6 (41. f3 Bxe3 (41...
Kg7 42. Raf2 {[%eval 131,33]}) 42. Nxe3 {[%eval 124,33]}) 41... Kg7 $2 (41...
Bb7 {[%eval 79,42]}) 42. f4 exf4 43. Ngxf4 Re5 44. Nxg6 Rxf1 45. Qxf1 Rxe4 46.
dxe4 Kxg6 47. Rf2 Qe8 48. e5 dxe5 49. Rf6+ Kg7 50. Rd6 1-0
[/pgn]

And as for the second one, which is Mihai Neghina's study "Detour", only Sting is able to solve more or less from the starting position, for Backward of author's solution I took komodo with switched off nullmove, which can use more hash (8G max. for Sting), and therefore is better here to keep longer lines in hash at Backward more easily:

[d]7q/b1p5/1p1Npkb1/pPP2ppP/P1P5/3B2P1/5P1R/K3R3 w - - 0 1

Analysis by Komodo 12.3 64-bit:

1.hxg6 Qxh2 2.Rxe6+ Kxe6 3.g7 Qh1+ 4.Kb2 Qa8 5.Bxf5+ Kf6 6.Nc8 Kxg7 7.c6 Bb8 8.Kc3 Ba7 9.Bd7 Bb8 10.f3 Kg6 11.Kd4 Kf6 12.Bg4 Ba7 13.f4 Bb8 14.Ke4 Ba7 15.Ke3 Kg6 16.Kd4 Kf6 17.Bd7 Bb8 18.Ke4 Ba7 19.Bf5 Qb8
+- (9.79) Depth: 27 00:03:11 5265MN

As for Sting, with some FW- BW it would do even better of course, especially for the winning eval, more hash would help much I guess (8G max.), but i wanted to show the exceptional abiltiy to get the King's march into output from starting position at all, no other engine get's that without FW- BW, lazy King's eval and almost no nullmove- usage might be the matter here most.

[d]7q/b1p5/1p1Npkb1/pPP2ppP/P1P5/3B2P1/5P1R/K3R3 w - - 0 1
Analysis by Sting 11.5 based on Stockfish 2.1.1 64bit:

1.hxg6 Qxh2 2.Rxe6+ Kxe6 3.g7 Qh1+ 4.Kb2 Qa8 5.Bxf5+ Kf6 6.Nc8 Kxg7 7.c6 Kf6 8.Bd7 Ke5 9.f3 Kd4 10.f4 gxf4 11.gxf4 Qb8 12.Be6 Ke4 13.f5 Ke5 14.Kc3 Qa8 15.Kd3 Qb8 16.Ke3 Kf6 17.Ke4 Qa8 18.Kd4 Qb8 19.Kd5 Qa8 20.Ke4 Qb8 21.Kf3 Ke5 22.Kg2 Kf6 23.Kg3 Ke5 24.Kf3
+/= (0.32) Depth: 37 00:12:09 11766MN

[zullil]

Does anyone have a mechanical solution (using computer only, but possibly with forward/backward analysis etc.) for these two:

[d]2bqrr1k/p5b1/1p1p2pp/nPpBp3/P1P1N2P/3PN1P1/R4P1K/3Q1R2 w - -

Direct search from root, so far:

info depth 71 seldepth 79 multipv 1 score cp 247 nodes 2085864888500 nps 36085450 hashfull 1000 tbhits 0 time 57803487 pv h4h5 g6g5 e4c3 c8e6 d5e6 e8e6 c3d5 f8f7 h2g2 e6e8 g3g4 e8f8 f1e1 h8g8 a2e2 d8d7 e3f5 g8h8 e2a2 f8e8 d5e3 a5b7 d1f3 b7a5 f3d5 e8e6 d5e4 e6e8 e3d5 e8f8 g2g1 a5b3 d5e3 d7e6 e1b1 b3a5 a2d2 e6d7 d2d1 f8e8 d1e1 e8f8 e4f3 d7e6 e3d5 h8g8 f3e4 e6d7 e1e3 g8h8 e3f3 d7d8 b1b2 d8d7 f3h3 a5b7 b2a2 b7a5 a2a3 d7e6 e4e2 f8d8 h3g3 e6d7 e2e4 d8f8 g1g2 d7d8 g3f3 d8d7 g2g3 d7d8 f3e3 d8d7 e3e1 a5b7 g3g2

info depth 76 seldepth 90 multipv 1 score cp 247 nodes 4077631527709 nps 36504809 hashfull 1000 tbhits 0 time 111701215 pv h4h5 g6g5 e4c3 c8e6 d5e6 e8e6 c3d5 f8f7 h2g2 e6e8 g3g4 e8f8 f1e1 h8g8 a2e2 d8d7 e3f5 g8h8 e2a2 a5b7 d1f3 f8e8 e1d1 b7a5 d5e3 a5b3 f3e4 e8d8 d1b1 b3a5 a2d2 f7f8 e3d5 f8f7 g2g3 a5b7 g3f3 b7a5 f3g2 d8f8 d2a2 d7d8 e4f3 f7d7 a2e2 d7f7 e2e4 d8d7 e4e1 f8e8 f3e2 a5b7 b1a1 e8f8 e2e4 b7a5 a1a2 a5b3 d5e3 f8d8 e4d5 b3a5 e1d1 f7f8 d5e4 a5b3 a2a3 b3a5 e3d5 f8f7 g2g1 d8f8 d1e1 f7f5 g4f5 f8f5 g1g2 d7f7 a3a2 g7f8

Terminating search.

[lech]

To solve this position an engin should solve the first part:

[pgn]
[FEN "7q/b1p5/1p1Npkb1/pPP2ppP/P1P5/3B2P1/5P1R/K3R3 w - -"]
1. hxg6 Qxh2 2. Rxe6 Kxe6 3. g7 Qh1 4. Kb2 Qa8 5. Bxf5 Kf6 6. Nc8 Kxg7 7. c6 Kf6
[/pgn]

and next the second part (continuation):

[pgn]
[FEN "q1N5/b1p5/1pP2k2/pP3Bp1/P1P5/6P1/1K3P2/8 w - -"]
1. Bd7 {or Bg4 with the same solution} Ke5 2. f3 Kd4 3. f4 gxf4 4. gf4 Ke4 5. f5 Ke5 6.Kc3 Kf6 7. Kd4 Qb8 8. Ke4 Qa8 9. Kf4 Qb8 10. Kg4 Qa8 11. Kh5 Qb8 12. Kh6 Qa8 13. Kh7 Qb8 14. Kg8 Qa8 15. Kf8 Qb8 16. Ke8 Qa8 17. Be6 Qb8 18. Kd7 {win}
[/pgn]

Sting 11.8 (Hash 1024M; 1CPU) solves both parts quickly (without any tricks!).
e.g. the second part:

[d]q1N5/b1p5/1pP2k2/pP3Bp1/P1P5/6P1/1K3P2/8 w - -

Code: Select all

info depth 39 multipv 1 score cp 44 nodes 118391106 nps 803168 time 147405 pv f5d7 f6e5 f2f3 e5d4 f3f4 g5f4 g3f4 d4e4 f4f5 e4e5 b2c3 e5f6 c3d4 a8b8 d4e3 b8a8 e3e4 a8b8 e4d4 b8a8 d7e6 a8b8 d4d3 b8a8 d3e4 a8b8 e4d4 b8a8 d4d3 f6e5 e6d7 a7b8 d3e3 b8a7 e3f3 a7b8 f3g4 e5f6 g4f4 b8a7 f4f3
info depth 40
info currmove f5d7 currmovenumber 1
info depth 40 multipv 1 score cp 56 lowerbound nodes 121258032 nps 803405 time 150930 pv f5d7
info currmove f5d7 currmovenumber 1
info depth 40 multipv 1 score cp 68 lowerbound nodes 128534015 nps 798695 time 160930 pv f5d7 f6e5 f2f3 e5d4 f3f4 g5f4 g3f4 d4e4 f4f5 e4e5 b2c3 e5f6 c3d4 a8b8 d4e3 b8a8 e3e4 a8b8 e4f4 b8a8 d7e6 a7b8 f4g4 b8a7 g4h5 a7b8 h5h6 b8a7 h6h7 a7b8 h7g8 b8a7 g8f8 a8b8 f8e8 b8a8 e8d7 a8b8 d7d8 b8a8 d8c7 a7b8 c7d7 b8f4 c6c7 a8g2 c8d6 g2d2 e6d5 f4d6 c7c8q f6f5 d7d6
info currmove f5d7 currmovenumber 1
info depth 40 multipv 1 score cp 86 lowerbound nodes 140408861 nps 791606 time 177372 pv f5d7 f6e5 f2f3 e5d4 f3f4 g5f4 g3f4 d4e4 f4f5 e4e5 b2c3 e5f6 c3d4 a8b8 d4e3 b8a8 e3e4 a8b8 e4f4 b8a8 d7e6 a7b8 f4g4 b8a7 g4h5 a7b8 h5h6 b8a7 h6h7 a7b8 h7g8 b8a7 g8f8 a8b8 f8e8 b8a8 e8d7 a8b8 d7d8 b8a8 d8c7 a7b8 c7d7 b8f4 c6c7 a8g2 c8d6 g2d2 e6d5 f4d6 c7c8q f6f5 d7d6
info currmove f5d7 currmovenumber 1
info currmove c8a7 currmovenumber 2
info currmove g3g4 currmovenumber 3
info currmove f2f3 currmovenumber 4
info currmove b2c2 currmovenumber 5
info currmove b2b3 currmovenumber 6
info currmove f2f4 currmovenumber 7
info currmove b2c3 currmovenumber 8
info currmove f5h3 currmovenumber 9
info currmove f5e6 currmovenumber 10
info currmove f5g4 currmovenumber 11
info currmove b2b1 currmovenumber 12
info currmove c8d6 currmovenumber 13
info currmove b2a2 currmovenumber 14
info currmove c4c5 currmovenumber 15
info currmove b2c1 currmovenumber 16
info currmove f5c2 currmovenumber 17
info currmove b2a3 currmovenumber 18
info currmove f5d3 currmovenumber 19
info currmove c8e7 currmovenumber 20
info currmove b2a1 currmovenumber 21
info currmove f5e4 currmovenumber 22
info currmove f5b1 currmovenumber 23
info currmove f5h7 currmovenumber 24
info currmove f5g6 currmovenumber 25
info currmove c8b6 currmovenumber 26
info depth 40 multipv 1 score cp 72 nodes 279269372 nps 790473 time 353294 pv f5d7 f6e5 f2f3 e5d4 f3f4 g5f4 g3f4 d4e4 f4f5 e4e5 b2c3 e5f6 c3d4 a8b8 d4e3 b8a8 e3e4 a8b8 e4f4 b8a8 d7e6 a7b8 f4g4 b8a7 g4h5 a7b8 h5h6 b8a7 h6h7 a7b8 h7g8 b8a7 g8f8 a8b8 f8e8 b8a8 e8d7 a8b8 d7d8 b8a8 d8c7 a7b8 c7d7 b8f4 c6c7 a8g2 c8d6 g2g7 d7c6 g7g2

It means that Sting can solve the both parts together too.

[zullil]

First run with Stockfish_181222_x64_modern
Conditions :
CPU : i7-6*4 GHz, 6 threads used
EGTB : 6 pieces syzygy + KRPPKRP
15 min per position
GUI : Arena 3.5.1

I plan to run 5 or 6 times.

Code: Select all

  
206) .. Rh6xh2          Kg8-h8   

[d]r5k1/p1pb2bp/3p3r/P1pPp1p1/2B1Pq2/1R2QPp1/1P4PP/5RBK b - -

Cfish-dev solves, but in a bit more than 900 seconds:

info depth 43 seldepth 64 multipv 1 score cp 111 lowerbound nodes 39886195201 nps 33850340 hashfull 1000 tbhits 0 time 1178310 pv h6h2
info depth 42 currmove h6h2 currmovenumber 1
info depth 43 seldepth 64 multipv 1 score cp 148 lowerbound nodes 40085154147 nps 33853159 hashfull 1000 tbhits 0 time 1184089 pv h6h2
info depth 41 currmove h6h2 currmovenumber 1
info depth 43 seldepth 64 multipv 1 score cp 196 lowerbound nodes 40458028070 nps 33862352 hashfull 1000 tbhits 0 time 1194779 pv h6h2
info depth 40 currmove h6h2 currmovenumber 1
info depth 43 seldepth 64 multipv 1 score cp 258 lowerbound nodes 40916457214 nps 33876595 hashfull 1000 tbhits 0 time 1207809 pv h6h2
info depth 39 currmove h6h2 currmovenumber 1
info depth 43 seldepth 64 multipv 1 score cp 338 lowerbound nodes 41505605678 nps 33896903 hashfull 1000 tbhits 0 time 1224466 pv h6h2
info depth 38 currmove h6h2 currmovenumber 1
info depth 43 seldepth 64 multipv 1 score cp 441 lowerbound nodes 42068790389 nps 33920535 hashfull 1000 tbhits 0 time 1240216 pv h6h2
info depth 37 currmove h6h2 currmovenumber 1
info depth 43 seldepth 64 multipv 1 score cp 571 lowerbound nodes 42634818523 nps 33947676 hashfull 1000 tbhits 0 time 1255898 pv h6h2
info depth 36 currmove h6h2 currmovenumber 1
info depth 43 seldepth 64 multipv 1 score cp 736 lowerbound nodes 44219130360 nps 34022854 hashfull 1000 tbhits 0 time 1299689 pv h6h2
info depth 35 currmove h6h2 currmovenumber 1
info depth 43 seldepth 68 multipv 1 score cp 944 lowerbound nodes 48123156891 nps 34307665 hashfull 1000 tbhits 0 time 1402694 pv h6h2

...

info depth 102 seldepth 44 multipv 1 score mate 22 nodes 1984376961518 nps 51944517 hashfull 1000 tbhits 0 time 38201856 pv h6h2 g1h2 f4h4 e3g1 a8f8 f3f4 e5f4 b3d3 d7g4 d3d2 g7d4 d2d4 c5d4 e4e5 f4f3 g2f3 g4f3 f1f3 f8f3 e5e6 f3e3 c4f1 d4d3 g1g2 g3h2 e6e7 e3e7 g2f3 d3d2 a5a6 e7e1 f3f5 g8g7 f5d7 g7g6 d7e6 e1e6 f1d3 g6f6 d5e6 d2d1q h1g2 h2h1q