Code: Select all
36/76 1:53 +M8++ 1.Bd7 (274.642.680) 2429
36/76 1:53 +M5 1.Bd7 b4 2.Kf7 b3 3.Ke7 b2 4.Kd8 g5
5.Bxc7+ (274.707.943) 2429
37/10 1:53 +M5 1.Bd7 b4 2.Kf7 b3 3.Ke7 b2 4.Kd8 g5
5.Bxc7+ (275.052.394) 2429
38/10 1:53 +M5 1.Bd7 b4 2.Kf7 b3 3.Ke7 b2 4.Kd8 g5
5.Bxc7+ (275.518.619) 2429
39/10 1:53 +M5 1.Bd7 b4 2.Kf7 b3 3.Ke7 b2 4.Kd8 g5
5.Bxc7+ (276.231.683) 2429
40/10 1:53 +M5 1.Bd7 b4 2.Kf7 b3 3.Ke7 b2 4.Kd8 g5
5.Bxc7+ (276.874.913) 2429
41/10 1:54 +M5 1.Bd7 b4 2.Kf7 b3 3.Ke7 b2 4.Kd8 g5
5.Bxc7+ (278.386.992) 2429
42/10 1:55 +M5 1.Bd7 b4 2.Kf7 b3 3.Ke7 b2 4.Kd8 g5
5.Bxc7+ (280.061.937) 2430
43/10 1:55 +M5 1.Bd7 b4 2.Kf7 b3 3.Ke7 b2 4.Kd8 g5
5.Bxc7+ (281.467.594) 2430
44/10 1:56 +M5 1.Bd7 b4 2.Kf7 b3 3.Ke7 b2 4.Kd8 g5
5.Bxc7+ (284.117.776) 2430
45/10 1:57 +M5 1.Bd7 b4 2.Kf7 b3 3.Ke7 b2 4.Kd8 g5
5.Bxc7+ (285.481.917) 2431
46/10 1:57 +M5 1.Bd7 b4 2.Kf7 b3 3.Ke7 b2 4.Kd8 g5
5.Bxc7+ (286.830.109) 2432
47/10 1:58 +M5 1.Bd7 b4 2.Kf7 b3 3.Ke7 b2 4.Kd8 g5
5.Bxc7+ (288.293.974) 2434
48/10 1:59 +M5 1.Bd7 b4 2.Kf7 b3 3.Ke7 b2 4.Kd8 g5
5.Bxc7+ (289.836.243) 2435
49/10 1:59 +M5 1.Bd7 b4 2.Kf7 b3 3.Ke7 b2 4.Kd8 g5
5.Bxc7+ (292.711.578) 2439
50/10 2:00 +M5 1.Bd7 b4 2.Kf7 b3 3.Ke7 b2 4.Kd8 g5
5.Bxc7+ (295.351.446) 2443
51/10 2:03 +M5 1.Bd7 b4 2.Kf7 b3 3.Ke7 b2 4.Kd8 g5
5.Bxc7+ (301.790.606) 2451
52/10 2:05 +M5 1.Bd7 b4 2.Kf7 b3 3.Ke7 b2 4.Kd8 g5
5.Bxc7+ (308.045.403) 2459
53/10 2:07 +M5 1.Bd7 b4 2.Kf7 b3 3.Ke7 b2 4.Kd8 g5
5.Bxc7+ (315.077.224) 2467
54/10 2:11 +M5 1.Bd7 b4 2.Kf7 b3 3.Ke7 b2 4.Kd8 g5
5.Bxc7+ (327.393.739) 2481
55/10 2:16 +M5 1.Bd7 b4 2.Kf7 b3 3.Ke7 b2 4.Kd8 g5
5.Bxc7+ (339.479.808) 2493
56/10 2:19 +M5 1.Bd7 b4 2.Kf7 b3 3.Ke7 b2 4.Kd8 g5
5.Bxc7+ (350.324.057) 2505
best move: Be6-d7 time: 2:19.891 min n/s: 2.505.177 nodes: 350.324.057
I must say it is not really clear to me why this happens , even though some at Fishcooking say you only need an inkling of knowledge of the way Stockfish works to explain why Stockfish has trouble, that is not enough explanation. It is clear Zugzwang is involved and only the PV search solves the one below, so if Stockfish chooses the wrong move for the PV in this one, which is very possible if there are more moves with a draw score, it has even far less chance of finding especially concerning this position below. Kaissa can't if it chooses something like Rd7 as first move, it is only the one version that does this but still:
Code: Select all
q7/7R/k7/1p6/1p6/1P2B3/7K/8 w - -
Engine: Kaissa IV NoContempt 20190801_008 (512 MB)
by T. Romstad, M. Costalba, J. Kiiski, G. Linscott
35/09 0:01 0.00 1.Rd7 Qb8+ 2.Kh1 Qa8+ 3.Kg1 Qg8+
4.Kf2 Qa8 (5.339.958) 3093
36/09 0:02 0.00 1.Rd7 Qb8+ 2.Kh1 Qa8+ (7.916.691) 3116
37/07 0:03 0.00 1.Rd7 Qb8+ 2.Kh1 Qa8+ (11.207.294) 3147
38/31 0:04 0.00 1.Rd7 Qb8+ 2.Kh1 Qa8+ 3.Kg1 Qg8+
4.Kf2 Qa8 5.Bc5 Qb8 6.Kf3 Qa8+ (14.565.140) 3146
39/15 0:06 0.00 1.Rd7 Qb8+ 2.Kh1 Qa8+ (19.884.761) 3153
40/05 0:08 0.00 1.Rd7 Qb8+ 2.Kh1 Qa8+ (25.647.041) 3145
41/13 0:11 0.00 1.Rd7 Qb8+ 2.Kh1 Qa8+ 3.Kg1 Qg8+
4.Kf2 Qa8 (35.947.868) 3145
42/09 0:21 0.00 1.Rd7 Qb8+ 2.Kh1 Qa8+ (66.599.533) 3113
43/48 0:26 0.00 1.Rd7 Qb8+ 2.Kh1 Qa8+ (82.949.714) 3116
44/48 0:30 0.00 1.Rd7 Qb8+ 2.Kh1 Qa8+ 3.Kg1 Qg8+
4.Kf2 Qa8 5.Ra7+ Qxa7 6.Bxa7 Kxa7
7.Ke3 Kb7 8.Ke4 Kc6 9.Kd4 Kd6 10.Ke3 Kd5
11.Kd3 Ke5 12.Ke3 (94.346.198) 3118
45/09 0:33 0.00 1.Rd7 Qb8+ 2.Kh1 Qa8+ (103.480.179) 3122
46/09 0:45 0.00 1.Rd7 Qb8+ 2.Kh1 Qa8+ (140.571.468) 3113
47/15 0:55 0.00 1.Rd7 Qb8+ 2.Kh1 Qa8+ 3.Kg1 Qg8+
4.Kf2 Qa8 (172.834.924) 3128
48/09 1:08 0.00 1.Rd7 Qb8+ 2.Kh1 Qa8+ 3.Kg1 Qg8+
4.Kf2 Qa8 (214.997.968) 3152
49/09 1:39 0.00 1.Rd7 Qb8+ 2.Kh1 Qa8+ (317.815.399) 3187
50/15 1:59 0.00 1.Rd7 Qb8+ 2.Kh1 Qa8+ (383.318.708) 3204
51/14 2:27 0.00 1.Rd7 Qb8+ 2.Kh1 Qa8+ 3.Kg1 Qg8+
4.Kf2 Qa8 5.Ke2 Qg2+ 6.Ke1 Qh1+
7.Ke2 (474.889.335) 3213
52/13 2:57 0.00 1.Rd7 Qb8+ 2.Kh1 Qa8+ 3.Kg1 Qg8+
4.Kf2 Qa8 (573.210.566) 3235
53/13 3:22 0.00 1.Rd7 Qb8+ 2.Kh1 Qa8+ (658.763.516) 3252
54/09 4:06 0.00 1.Rd7 Qb8+ 2.Kh1 Qa8+ 3.Kg1 Qg8+
4.Kf2 Qa8 (804.694.830) 3260
55/09 5:34 0.00 1.Rd7 Qb8+ 2.Kh1 Qa8+ (1.084.789.697) 3245
56/09 6:49 0.00 1.Rd7 Qb8+ 2.Kh1 Qa8+ (1.340.135.006) 3271
57/27 8:19 0.00 1.Rd7 Qb8+ 2.Kh1 Qa8+ (1.643.405.149) 3290
58/31 10:59 0.00 1.Rd7 Qb8+ 2.Kh1 Qa8+ 3.Kg1 Qg8+
4.Kf2 Qa8 (2.147.365.553) 3255
59/23 15:44 0.00 1.Rd7 Qb8+ 2.Kh1 Qa8+ (3.104.593.270) 3287
60/23 18:22 0.00 1.Rd7 Qb8+ 2.Kh1 Qa8+ (3.639.819.776) 3301
best move: Rh7-d7 time: 18:22.641 min n/s: 3.301.091 nodes: 3.639.819.776
Tablebases help it seems but they were not used in my case.
[d]q7/7R/k7/1p6/1p6/1P2B3/7K/8 w - -
Code: Select all
q7/7R/k7/1p6/1p6/1P2B3/7K/8 w - -
Engine: Kaissa IV NoContempt 20190801_006 (one thread, 512 MB)
by T. Romstad, M. Costalba, J. Kiiski, G. Linscott
35/21 0:01 0.00 1.Bd4 Qb8+ 2.Kh3 Qa8 (5.743.308) 3244
36/27 0:02 0.00 1.Bd4 Qb8+ 2.Kh3 Qa8 (7.669.494) 3263
37/19 0:03 0.00 1.Bd4 Qb8+ 2.Kh3 Qa8 (11.141.149) 3247
38/25 0:04 0.00 1.Bd4 Qb8+ 2.Kh3 Qa8 3.Kg3 Qb8+ (14.171.748) 3234
39/23 0:06 0.00 1.Bd4 Qb8+ 2.Kh3 Qa8 3.Kg3 Qb8+ (19.320.921) 3205
40/23 0:06 0.00 1.Bd4 Qb8+ 2.Kh3 Qa8 3.Kg3 Qb8+
4.Kf3 Qa8+ 5.Ke3 Qb8 6.Ra7+ Qxa7
7.Bxa7 Kxa7 8.Kd4 Kb6 9.Kd5 Ka6
10.Kc6 Ka5 11.Kc5 Ka6 (21.943.827) 3205
41/23 0:09 0.00 1.Bd4 Qb8+ 2.Kh3 Qa8 3.Kg3 Qb8+
4.Kf3 Qa8+ 5.Ke3 Qb8 6.Ra7+ Qxa7
7.Bxa7 Kxa7 8.Kd4 Kb6 9.Kd5 Ka6
10.Kc6 Ka5 11.Kc5 Ka6 (29.568.593) 3183
42/23 0:12 0.00 1.Bd4 Qb8+ 2.Kh3 Qa8 (41.077.562) 3164
43/23 0:17 0.00 1.Bd4 Qb8+ 2.Kh3 Qa8 (56.155.012) 3182
44/11 0:22 0.00 1.Bd4 Qb8+ 2.Kh3 Qa8 (73.292.305) 3199
45/28 0:30 0.00 1.Bd4 Qb8+ 2.Kh3 Qa8 3.Kg3 Qb8+
4.Kf3 Qa8+ 5.Ke3 Qb8 6.Ra7+ Qxa7
7.Bxa7 Kxa7 8.Kd4 Ka6 9.Kc5 Ka5
10.Kd5 Kb6 11.Kd6 Kb7 12.Kc5 Ka6
13.Kc6 Ka5 14.Kd5 (95.597.678) 3181
46/41 0:41 0.00 1.Bd4 Qb8+ 2.Kh3 Qa8 3.Kg3 Qb8+ (131.623.242) 3144
47/27 0:49 0.00 1.Bd4 Qb8+ 2.Kh3 Qa8 3.Kg3 Qb8+
4.Kf3 Qa8+ 5.Ke3 Qb8 6.Ra7+ Qxa7
7.Bxa7 Kxa7 8.Kd4 Kb6 9.Kd5 Ka5
10.Kc5 Ka6 11.Kc6 Ka5 12.Kd7 Kb6
13.Kd6 Ka5 (155.998.983) 3151
48/29 1:15 0.00 1.Bd4 Qb8+ 2.Kh3 Qa8 3.Kg3 Qb8+
4.Kf3 Qa8+ 5.Ke3 Qe8+ 6.Kd2 Qb8
7.Ke2 Qe8+ (239.608.565) 3156
49/15 1:29 0.00 1.Bd4 Qb8+ 2.Kh3 Qa8 (283.744.769) 3178
50/15 1:45 0.00 1.Bd4 Qb8+ 2.Kh3 Qa8 (335.694.603) 3185
51/27 2:54 0.00 1.Bd4 Qb8+ 2.Kh3 Qa8 3.Kg3 Qb8+ (561.648.173) 3215
52/43 3:15 +0.11++ 1.Bd4 (626.644.204) 3207
52/43 3:26 +0.22++ 1.Bd4 (664.205.918) 3220
52/43 3:26 +0.37++ 1.Bd4 (664.927.631) 3220
52/56 3:26 +0.59++ 1.Bd4 (666.357.623) 3220
52/56 3:28 +0.88++ 1.Bd4 (670.464.253) 3219
52/56 3:28 +1.26++ 1.Bd4 (671.768.582) 3219
52/56 3:28 +1.76++ 1.Bd4 (672.071.308) 3220
52/56 3:28 +2.41++ 1.Bd4 (672.831.604) 3220
52/63 3:29 +3.24++ 1.Bd4 (673.447.147) 3221
52/70 3:35 +3.97 1.Bd4 Qb8+ 2.Kh1 Qa8+ 3.Kg1 Qg8+
4.Rg7 Qb8 5.Kg2 Qa8+ 6.Kg3 Qb8+
7.Kf3 Qf8+ 8.Ke2 Qa8 9.Ke3 Qe8+
10.Kd3 Qb8 11.Rg6+ Ka5 12.Rg1 Ka6
13.Rg7 Qa8 14.Rf7 (692.828.854) 3221
53/79 3:41 +4.08++ 1.Bd4 (711.253.277) 3215
53/79 3:58 +4.19++ 1.Bd4 (760.955.100) 3188
53/79 4:03 +4.34++ 1.Bd4 (777.803.721) 3188
53/79 4:05 +4.56++ 1.Bd4 (782.478.260) 3186
53/79 4:05 +4.85++ 1.Bd4 (783.759.586) 3187
53/79 4:07 +5.23++ 1.Bd4 (789.251.041) 3191
53/100 4:08 +5.74++ 1.Bd4 (794.792.336) 3197
53/100 4:09 +6.38++ 1.Bd4 (797.899.671) 3201
53/100 4:10 +7.22++ 1.Bd4 (802.120.813) 3204
53/100 4:11 +8.28++ 1.Bd4 (805.629.993) 3207
53/100 4:15 +8.28 1.Bd4 Qb8+ 2.Kh1 Qa8+ 3.Kg1 Qg8+
4.Rg7 Qb8 5.Kg2 Qa8+ 6.Kg3 Qb8+
7.Kf3 Qf8+ 8.Ke2 Qe8+ 9.Kd3 Qa8
10.Rf7 Qb8 11.Kc2 Qh2+ 12.Bf2 Qb8
13.Kb1 Qa8 14.Kb2 (818.857.498) 3208
54/67 5:44 +8.38++ 1.Bd4 (1.100.376.654) 3194
54/99 6:49 +8.49++ 1.Bd4 (1.301.196.843) 3179
54/99 7:06 +8.65++ 1.Bd4 (1.380.659.610) 3233
54/99 7:19 +8.86++ 1.Bd4 (1.439.283.033) 3276
54/99 7:35 +9.15++ 1.Bd4 (1.499.630.668) 3293
54/99 7:43 +9.54++ 1.Bd4 (1.532.909.498) 3310
54/99 7:57 +10.04++ 1.Bd4 (1.600.251.647) 3349
54/99 7:59 +10.69++ 1.Bd4 (1.606.054.982) 3350
54/99 8:00 +11.52++ 1.Bd4 (1.610.033.785) 3351
54/99 8:01 +12.58++ 1.Bd4 (1.612.873.871) 3351
54/99 8:02 +13.93++ 1.Bd4 (1.616.372.303) 3351
54/99 8:02 +15.63++ 1.Bd4 (1.617.260.642) 3352
54/99 8:02 +17.78++ 1.Bd4 (1.617.844.415) 3352
54/99 8:02 +20.49++ 1.Bd4 (1.618.240.645) 3352
54/99 8:02 +23.90++ 1.Bd4 (1.618.432.859) 3352
54/99 8:02 +28.18++ 1.Bd4 (1.618.518.403) 3352
54/99 8:02 +33.56++ 1.Bd4 (1.618.609.458) 3352
54/99 8:02 +40.30++ 1.Bd4 (1.618.646.788) 3352
54/99 8:03 +9.91 1.Bd4 Qb8+ 2.Kh1 Qa8+ 3.Kg1 Qg8+
4.Rg7 Qb8 5.Kg2 Qa8+ 6.Kg3 Qb8+
7.Kf3 Qf8+ 8.Ke2 Qe8+ 9.Kd3 Qa8
10.Rf7 Qb8 11.Kc2 Qh2+ 12.Bf2 Qb8
13.Kb1 Qa8 14.Ka2 (1.623.461.550) 3354
55/47 10:03 +10.02++ 1.Bd4 (1.992.323.000) 3302
55/75 10:12 +10.13++ 1.Bd4 (2.018.462.996) 3296
55/75 10:23 +10.28++ 1.Bd4 (2.060.680.264) 3304
55/75 10:29 +10.50++ 1.Bd4 (2.081.518.087) 3308
55/75 10:35 +10.79++ 1.Bd4 (2.105.071.118) 3313
55/75 10:43 +11.17++ 1.Bd4 (2.134.461.629) 3318
55/155 10:49 +11.68++ 1.Bd4 (2.157.931.100) 3322
55/155 10:52 +12.32++ 1.Bd4 (2.170.369.979) 3324
55/155 10:56 +13.15++ 1.Bd4 (2.183.092.855) 3327
55/155 10:58 +14.22++ 1.Bd4 (2.192.840.223) 3329
55/155 10:59 +15.56++ 1.Bd4 (2.197.865.731) 3330
55/155 11:00 +17.27++ 1.Bd4 (2.200.460.927) 3330
55/155 11:00 +19.42++ 1.Bd4 (2.201.410.999) 3331
55/155 11:01 +22.13++ 1.Bd4 (2.202.290.491) 3331
55/155 11:01 +25.53++ 1.Bd4 (2.202.792.693) 3331
55/155 11:01 +29.82++ 1.Bd4 (2.203.127.404) 3331
55/155 11:01 +35.19++ 1.Bd4 (2.203.387.988) 3331
55/155 11:01 +41.93++ 1.Bd4 (2.203.531.792) 3331
55/155 11:02 +47.82 1.Bd4 Qb8+ 2.Kh1 Qa8+ 3.Kg1 Qg8+
4.Rg7 Qb8 5.Kg2 Qa8+ 6.Kg3 Qb8+
7.Kf3 Qf8+ 8.Ke2 Qe8+ 9.Kd3 Qa8
10.Rf7 Qb8 11.Kc2 Qc8+ 12.Kb2 Qa8
13.Bf2 Qh8+ 14.Kb1 (2.206.247.513) 3332
56/76 29:24 +47.92++ 1.Bd4 (6.000.434.811) 3400
56/76 34:40 +48.03++ 1.Bd4 (7.088.070.986) 3406
56/95 36:01 +48.19++ 1.Bd4 (7.472.998.393) 3457
56/95 38:39 +48.19 1.Bd4 Qb8+ 2.Kh1 Qa8+ 3.Kg1 Qg8+
4.Rg7 Qb8 5.Kg2 Qa8+ 6.Kg3 Qb8+
7.Kf3 Qf8+ 8.Ke4 Qe8+ 9.Kd3 Qa8
10.Rf7 Qb8 11.Kc2 Qh2+ 12.Bf2 Qb8
13.Kc1 Qc8+ 14.Kb1 (7.965.122.353) 3434
57/72 69:48 +48.30++ 1.Bd4 (13.943.637.671) 3329
57/87 71:09 +48.40++ 1.Bd4 (14.324.547.351) 3355
57/87 72:12 +48.56++ 1.Bd4 (14.626.048.661) 3376
57/87 72:48 +48.77++ 1.Bd4 (14.803.244.256) 3388
57/87 73:23 +49.07++ 1.Bd4 (14.969.502.082) 3399
57/87 73:47 +49.45++ 1.Bd4 (15.081.627.924) 3406
57/87 74:04 +49.95++ 1.Bd4 (15.165.298.595) 3412
57/87 74:20 +50.60++ 1.Bd4 (15.241.399.311) 3416
57/87 74:27 +51.43++ 1.Bd4 (15.277.442.076) 3419
57/87 74:41 +52.49++ 1.Bd4 (15.345.364.365) 3423
57/87 74:51 +53.84++ 1.Bd4 (15.395.637.100) 3427
57/87 74:57 +55.54++ 1.Bd4 (15.421.824.388) 3429
57/87 74:57 +52.51 1.Bd4 Qb8+ 2.Kh1 Qa8+ 3.Kg1 Qg8+
4.Rg7 Qb8 5.Kg2 Qa8+ 6.Kg3 Qb8+
7.Kf3 Qf8+ 8.Ke4 Qe8+ 9.Kd3 Qa8
10.Rf7 Qb8 11.Kc2 Qa8 12.Kb2 Qg2+
13.Bf2 Qa8 14.Rh7 (15.425.027.214) 3429
58/70 102:18 +52.61++ 1.Bd4 (20.696.832.287) 3371
58/70 102:30 +52.72++ 1.Bd4 (20.752.224.210) 3373
58/70 102:38 +52.88++ 1.Bd4 (20.787.122.692) 3375
58/70 102:43 +53.09++ 1.Bd4 (20.811.982.988) 3376
58/70 102:46 +53.38++ 1.Bd4 (20.826.519.163) 3377
58/70 102:51 +53.77++ 1.Bd4 (20.847.067.164) 3378
58/70 102:54 +54.27++ 1.Bd4 (20.862.768.812) 3378
58/70 102:57 +54.92++ 1.Bd4 (20.878.277.175) 3379
58/70 102:59 +55.75++ 1.Bd4 (20.887.038.881) 3380
58/70 103:00 +56.81++ 1.Bd4 (20.891.613.066) 3380
58/70 103:16 +52.40-- 1.Bd4 Qb8+ (20.945.505.747) 3379
58/70 140:57 +55.28++ 1.Bd4 (27.761.507.471) 3282
58/70 140:59 +57.43++ 1.Bd4 (27.769.865.489) 3282
58/70 156:31 +57.43 1.Bd4 (30.704.116.953) 3269
best move: Be3-d4 time: 156:31.906 min n/s: 3.269.222 nodes: 30.704.116.953