Bugaboo position for SF

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Dann Corbit
Posts: 10207
Joined: Wed Mar 08, 2006 7:57 pm
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Bugaboo position for SF

Post by Dann Corbit » Fri Mar 30, 2018 4:20 am

Stockfish has a truly terrible time with this position:
[d]8/2p1q3/p3P3/2P4p/1PBP2kP/2N3P1/7K/8 w - -
Houdini solves it quickly:

Code: Select all

    Avoid move: 
    Best move (Houdini 6 Tactical 1): Bc4-e2
    Not found in: 10:00
    13/28	00:00	   2,225,848	19,024,000	+0.63	Bf1 Qd8 d5 Kf5 Bc4 Qf8 Kg2 a5 bxa5 Qxc5 a6 Ke5 a7
    14/33	00:00	   5,538,067	19,363,000	+0.07	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 d5 Kf5 Ng5 Qe5 Kh3 Kg6 Bf3 Qf5+ Kh2 Qe5 e7 Qxe7
    15/38	00:00	   7,690,899	19,770,000	 0.00	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 Bh3+ Kf3 Ng5+ Kf2 Bg2 Qxd4 Nh3+
    16/38	00:00	   8,437,693	19,714,000	 0.00	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 Bh3+ Kf3 Ng5+ Kf2 Bg2 Qxd4 Nh3+ Ke3
    17/38	00:00	   9,269,346	19,680,000	 0.00	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 Bh3+ Kf3 Ng5+ Kf2 Bg2 Qxd4 Nh3+ Ke3 Nf4
    18/41	00:00	  12,144,621	19,035,000	 0.00	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 d5 Kf5 Bf3 Qe5 Ng5 Kg6 Bg2 Kf5 Kh3 Kg6
    19/41	00:00	  14,655,188	19,057,000	 0.00	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 d5 Kf5 Bf3 Qe5 Ng5 Kg6 Bg2 Kf5 Kh3 Kg6 Bf3
    20/41	00:01	  22,005,840	19,252,000	 0.00	Bf1 Qf8 Bh3+ Kf3 Bg2+ Kg4 d5 Qg7 Ne4 Kf5 Bf3 Qe5 Ng5 Kg6 Bg2 Kf5 Kh3 Kg6 Bf3 Qf5+
    21/47	00:01	  31,179,220	19,011,000	 0.00	Bf1 Qf8 Bh3+ Kf3 Bg2+ Kg4 d5 Qg7 Ne4 Kf5 Bf3 Qe5 Ng5 Kg6 Bg2 Kf5 Kh3 Kg6 Bf3 Qf5+ Kh2
    22/49	00:02	  40,973,961	18,641,000	 0.00	Bf1 Qf8 Bh3+ Kf3 Bg2+ Kg4 d5 Qg7 Ne4 Kf5 Ng5 Qe5 Kh3 Kg6 Bf3 Qf5+ Kh2 Qe5 Bg2 Kf5
    23/49	00:03	  59,923,353	18,696,000	 0.00	Bf1 Qf8 Bh3+ Kf3 Bg2+ Kg4 d5 Qg7 Ne4 Kf5 Ng5 Qe5 Kh3 Kg6 Bf3 Qf5+ Kh2 Qe5 Bg2 Kf5
    24/54	00:04	  82,436,723	18,663,000	 0.00	Bf1 Qf8 Bh3+ Kf3 Bg2+ Kg4 d5 Qg7 Ne4 Kf5 Ng5 Qe5 Kh3 Kg6 Bf3 Qf5+ Kh2 Qe5 Bg2 Kf5
    25/55	00:05	  95,754,937	18,386,000	 0.00	Bf1 Qf8 Bh3+ Kf3 Bg2+ Kg4 d5 Qg7 Ne4 Kf5 Ng5 Qe5 Kh3 Kg6 Bf3 Qf5+ Kh2 Qe5 Bg2 Kf5
    25/55+	00:06	 114,921,153	18,482,000	+0.07	Be2+
    25/63+	00:15	 161,748,596	10,841,000	+11.40	Be2+
    25/63	00:15	 166,731,832	10,495,000	+12.33	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qg7 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kd6 g4 Ke5 gxh5 Kf6 h6 Kg6 Kg4 a5 bxa5 Kh7 a6 Kg6 a7
    25/63	00:16	 166,733,601	10,495,000	+12.33	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qg7 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kd6 g4 Ke5 gxh5 Kf6 h6 Kg6 Kg4 a5 bxa5 Kh7 a6 Kg6 a7
    26/63+	00:17	 170,847,453	10,089,000	+12.40	Be2+
    26/63-	00:17	 171,043,173	10,072,000	+12.33	Be2+ Kf5
    26/63+	00:17	 171,567,218	9,996,000	+12.40	Be2+
    26/63+	00:17	 173,341,264	9,888,000	+12.55	Be2+
    26/63-	00:17	 173,716,620	9,880,000	+12.43	Be2+ Kf5
    26/63-	00:17	 173,874,781	9,865,000	+10.69	Be2+ Kf5
    26/63+	00:17	 174,273,656	9,833,000	+11.19	Be2+
    26/63+	00:17	 174,611,213	9,810,000	+12.17	Be2+
    26/63-	00:17	 174,967,836	9,786,000	+11.35	Be2+ Kf5
    26/63+	00:18	 175,185,978	9,781,000	+12.39	Be2+
    26/63+	00:19	 182,592,352	9,485,000	+14.38	Be2+
    26/63	00:19	 185,697,641	9,410,000	+14.38	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qh8 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kd4 g4 Ke5 gxh5 Kf5 h6 Kg6 Kg4 Kh7 Kf5 a5 bxa5 Kg8 a6
    26/63	00:19	 185,698,657	9,411,000	+14.38	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qh8 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kd4 g4 Ke5 gxh5 Kf5 h6 Kg6 Kg4 Kh7 Kf5 a5 bxa5 Kg8 a6
    27/63+	00:21	 193,614,706	9,050,000	+14.45	Be2+
    27/63-	00:21	 193,964,366	9,027,000	+14.38	Be2+ Kf5
    27/63-	00:21	 194,577,549	9,011,000	+12.61	Be2+ Kf5
    27/63+	00:21	 194,884,560	9,004,000	+13.03	Be2+
    27/63+	00:21	 195,427,371	9,000,000	+13.80	Be2+
    27/63-	00:21	 195,789,396	9,000,000	+12.70	Be2+ Kf5
    27/63+	00:21	 196,385,681	8,988,000	+13.97	Be2+
    27/63+	00:25	 217,329,514	8,561,000	+17.55	Be2+
    27/65	00:28	 238,566,291	8,445,000	+22.96	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qh8 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Kd5 g4 Ke6 gxh5 Kf6 h6 Kg6 Kg3 Kh7 Kg4 Kg6 h7 Kf6 h8Q+ Ke6 Qc8+ Ke5 Qxc7+ Ke4 Qf4+ Kd3
    27/65	00:28	 238,569,238	8,445,000	+22.96	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qh8 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Kd5 g4 Ke6 gxh5 Kf6 h6 Kg6 Kg3 Kh7 Kg4 Kg6 h7 Kf6 h8Q+ Ke6 Qc8+ Ke5 Qxc7+ Ke4 Qf4+ Kd3
    28/65	00:38	 277,376,652	7,233,000	+92.00	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 a5 b5 a4 Kg2 Qf6 Nd3 Qf1+ Kxf1 Kxg3 b6 a3 Bd5 a2 Bxa2 c6 b7 Kf3 b8Q Ke3 Qe8+ Kxd3 Qxh5 Kc3 Qe8 Kd2 Qxc6 Kc3 Qe6 Kb4 Qb6+
    28/65	00:38	 277,405,788	7,232,000	+92.00	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 a5 b5 a4 Kg2 Qf6 Nd3 Qf1+ Kxf1 Kxg3 b6 a3 Bd5 a2 Bxa2 c6 b7 Kf3 b8Q Ke3 Qe8+ Kxd3 Qxh5 Kc3 Qe8 Kd2 Qxc6 Kc3 Qe6 Kb4 Qb6+
    29/65	00:39	 282,675,894	7,119,000	+92.00	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qxe4 Nf6+ Kf5 Nxe4 c6 Ng5 Kf6 g4 hxg4 Kg3 Ke7 Kxg4 Ke8 h5 Kf8 h6 Kg8 Kf5 Kf8 Ne6+ Kg8 Kg6 Kh8 Ng5 Kg8 h7+ Kf8 h8Q+ Ke7
    29/65	00:39	 282,699,331	7,118,000	+92.00	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qxe4 Nf6+ Kf5 Nxe4 c6 Ng5 Kf6 g4 hxg4 Kg3 Ke7 Kxg4 Ke8 h5 Kf8 h6 Kg8 Kf5 Kf8 Ne6+ Kg8 Kg6 Kh8 Ng5 Kg8 h7+ Kf8 h8Q+ Ke7
    30/65	00:40	 283,902,528	7,098,000	+92.00	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qxe4 Nf6+ Kf5 Nxe4 c6 Ng5 Kf6 g4 hxg4 Kg3 Ke7 Kxg4 Ke8 h5 Kf8 h6 Kg8 Kf5 Kf8 Ne6+ Kg8 Kg6 Kh8 Ng5 Kg8 h7+ Kf8 h8Q+ Ke7
    30/65	00:40	 283,932,382	7,097,000	+92.00	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qxe4 Nf6+ Kf5 Nxe4 c6 Ng5 Kf6 g4 hxg4 Kg3 Ke7 Kxg4 Ke8 h5 Kf8 h6 Kg8 Kf5 Kf8 Ne6+ Kg8 Kg6 Kh8 Ng5 Kg8 h7+ Kf8 h8Q+ Ke7
    31/65	00:43	 299,920,624	6,903,000	+92.04	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 a5 b5 a4 Kg2 Qf6 Nd3 Qf1+ Kxf1 Kxg3 b6 a3 Bd5 a2 Bxa2 c6 b7 Kf3 b8Q Ke3 Qe8+ Kxd3 Qxh5 Kc3 Qe8 Kd2 Qxc6 Kc3 Qe6 Kb4
    31/65	00:43	 299,985,573	6,902,000	+92.04	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 a5 b5 a4 Kg2 Qf6 Nd3 Qf1+ Kxf1 Kxg3 b6 a3 Bd5 a2 Bxa2 c6 b7 Kf3 b8Q Ke3 Qe8+ Kxd3 Qxh5 Kc3 Qe8 Kd2 Qxc6 Kc3 Qe6 Kb4
    32/74	01:09	 441,522,426	6,394,000	+100.96	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qxe4 Nf6+ Kf5 Nxe4 Ke6 Kh3 Kf5 Ng5 Kf6 g4 Ke7 gxh5 Kd7 h6 Kc6 h7 Kb5 h8Q Kc4 Qc8 Kxd4 Qxc7 Kc3 Qa5 Kd2 Qxa6 Kc2 c6 Kb1 c7
    32/74	01:09	 441,599,269	6,394,000	+100.96	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qxe4 Nf6+ Kf5 Nxe4 Ke6 Kh3 Kf5 Ng5 Kf6 g4 Ke7 gxh5 Kd7 h6 Kc6 h7 Kb5 h8Q Kc4 Qc8 Kxd4 Qxc7 Kc3 Qa5 Kd2 Qxa6 Kc2 c6 Kb1 c7
    33/81	01:44	 638,731,173	6,113,000	+148.78	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qxe4 Nf6+ Kf5 Nxe4 Ke6 Kh3 Kf5 Ng5 Kf6 g4 c6 gxh5 Kg7 h6+ Kxh6 Kg4 Kg7 d5 Kf6 Ne4+ Ke5 dxc6 Kd4 c7 Kc4 c8Q Kd3 Qxa6+ Kc2 c6 Kb2
    33/81	01:44	 638,812,441	6,113,000	+148.78	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qxe4 Nf6+ Kf5 Nxe4 Ke6 Kh3 Kf5 Ng5 Kf6 g4 c6 gxh5 Kg7 h6+ Kxh6 Kg4 Kg7 d5 Kf6 Ne4+ Ke5 dxc6 Kd4 c7 Kc4 c8Q Kd3 Qxa6+ Kc2 c6 Kb2
    34/81	02:07	 746,891,520	5,873,000	+148.79	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qf6 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kf5 g4+ Kg6 gxh5+ Kh6 Kg4 Kg7 Kf5 Kf7 h6 Kg8 h7+ Kg7 h8Q+ Kxh8 Ke6
    34/81	02:07	 747,114,980	5,874,000	+148.79	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qf6 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kf5 g4+ Kg6 gxh5+ Kh6 Kg4 Kg7 Kf5 Kf7 h6 Kg8 h7+ Kg7 h8Q+ Kxh8 Ke6
    35/81	02:25	 818,088,610	5,638,000	+148.79	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qf6 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kf6 g4 Kg7 gxh5 Kh6 Kg4 Kg7 h6+ Kh7 Kf5 Kg8 h7+ Kg7 h8Q+ Kxh8 Ke6
    35/81	02:25	 818,174,428	5,638,000	+148.79	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qf6 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kf6 g4 Kg7 gxh5 Kh6 Kg4 Kg7 h6+ Kh7 Kf5 Kg8 h7+ Kg7 h8Q+ Kxh8 Ke6
    36/81	02:53	 940,942,284	5,413,000	+148.79	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qf6 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kf6 g4 Kg7 gxh5 Kh6 Kg4 Kg7 h6+ Kh7 Kf5 Kg8 h7+ Kg7 h8Q+ Kxh8 Ke6
    36/81	02:53	 941,105,954	5,413,000	+148.79	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qf6 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kf6 g4 Kg7 gxh5 Kh6 Kg4 Kg7 h6+ Kh7 Kf5 Kg8 h7+ Kg7 h8Q+ Kxh8 Ke6
    37/81	03:24	1,109,448,116	5,420,000	+148.79	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qf6 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kf6 g4 Kg7 gxh5 Kh6 Kg4 Kg7 h6+ Kh7 Kf5 Kg8 h7+ Kg7 h8Q+ Kxh8 Ke6
    37/81	03:24	1,110,397,812	5,421,000	+148.79	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qf6 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kf6 g4 Kg7 gxh5 Kh6 Kg4 Kg7 h6+ Kh7 Kf5 Kg8 h7+ Kg7 h8Q+ Kxh8 Ke6
    38/81	05:06	1,641,217,869	5,354,000	+148.80	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qf6 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kf5 g4+ hxg4+ Kg3 Ke6 Kxg4 Ke5 Kg5 Ke6 Kf4 Kd6 Kf5 Ke7 b5 a5 b6 Kd6
    38/81	05:06	1,642,358,852	5,356,000	+148.80	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qf6 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kf5 g4+ hxg4+ Kg3 Ke6 Kxg4 Ke5 Kg5 Ke6 Kf4 Kd6 Kf5 Ke7 b5 a5 b6 Kd6
    39/81	08:22	2,493,599,411	4,959,000	+148.80	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qf6 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kf5 g4+ hxg4+ Kg3 Ke6 Kxg4 Ke5 Kg5 Ke6 Kf4 Kd6 Kf5 Ke7 b5 a5 b6 Kd6 bxc7
    39/81	08:23	2,495,261,180	4,961,000	+148.80	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qf6 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kf5 g4+ hxg4+ Kg3 Ke6 Kxg4 Ke5 Kg5 Ke6 Kf4 Kd6 Kf5 Ke7 b5 a5 b6 Kd6 bxc7
And stockfish cannot solve it even if you let it analyze the position after the winning move for ten minutes before trying to analyze the original problem.

Which is to say that SF also cannot tell that this position is dead lost even after quite a long think:
[d]8/2p1q3/p3P3/2P4p/1P1P2kP/2N3P1/4B2K/8 b - -
Taking ideas is not a vice, it is a virtue. We have another word for this. It is called learning.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.

MikeGL
Posts: 901
Joined: Thu Sep 01, 2011 12:49 pm

Re: Bugaboo position for SF

Post by MikeGL » Fri Mar 30, 2018 4:36 am

Dann Corbit wrote:Stockfish has a truly terrible time with this position:
[d]8/2p1q3/p3P3/2P4p/1PBP2kP/2N3P1/7K/8 w - -
Houdini solves it quickly:

Code: Select all

    Avoid move: 
    Best move (Houdini 6 Tactical 1): Bc4-e2
    Not found in: 10:00
    13/28	00:00	   2,225,848	19,024,000	+0.63	Bf1 Qd8 d5 Kf5 Bc4 Qf8 Kg2 a5 bxa5 Qxc5 a6 Ke5 a7
    14/33	00:00	   5,538,067	19,363,000	+0.07	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 d5 Kf5 Ng5 Qe5 Kh3 Kg6 Bf3 Qf5+ Kh2 Qe5 e7 Qxe7
    15/38	00:00	   7,690,899	19,770,000	 0.00	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 Bh3+ Kf3 Ng5+ Kf2 Bg2 Qxd4 Nh3+
    16/38	00:00	   8,437,693	19,714,000	 0.00	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 Bh3+ Kf3 Ng5+ Kf2 Bg2 Qxd4 Nh3+ Ke3
    17/38	00:00	   9,269,346	19,680,000	 0.00	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 Bh3+ Kf3 Ng5+ Kf2 Bg2 Qxd4 Nh3+ Ke3 Nf4
    18/41	00:00	  12,144,621	19,035,000	 0.00	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 d5 Kf5 Bf3 Qe5 Ng5 Kg6 Bg2 Kf5 Kh3 Kg6
    19/41	00:00	  14,655,188	19,057,000	 0.00	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 d5 Kf5 Bf3 Qe5 Ng5 Kg6 Bg2 Kf5 Kh3 Kg6 Bf3
    20/41	00:01	  22,005,840	19,252,000	 0.00	Bf1 Qf8 Bh3+ Kf3 Bg2+ Kg4 d5 Qg7 Ne4 Kf5 Bf3 Qe5 Ng5 Kg6 Bg2 Kf5 Kh3 Kg6 Bf3 Qf5+
    21/47	00:01	  31,179,220	19,011,000	 0.00	Bf1 Qf8 Bh3+ Kf3 Bg2+ Kg4 d5 Qg7 Ne4 Kf5 Bf3 Qe5 Ng5 Kg6 Bg2 Kf5 Kh3 Kg6 Bf3 Qf5+ Kh2
    22/49	00:02	  40,973,961	18,641,000	 0.00	Bf1 Qf8 Bh3+ Kf3 Bg2+ Kg4 d5 Qg7 Ne4 Kf5 Ng5 Qe5 Kh3 Kg6 Bf3 Qf5+ Kh2 Qe5 Bg2 Kf5
    23/49	00:03	  59,923,353	18,696,000	 0.00	Bf1 Qf8 Bh3+ Kf3 Bg2+ Kg4 d5 Qg7 Ne4 Kf5 Ng5 Qe5 Kh3 Kg6 Bf3 Qf5+ Kh2 Qe5 Bg2 Kf5
    24/54	00:04	  82,436,723	18,663,000	 0.00	Bf1 Qf8 Bh3+ Kf3 Bg2+ Kg4 d5 Qg7 Ne4 Kf5 Ng5 Qe5 Kh3 Kg6 Bf3 Qf5+ Kh2 Qe5 Bg2 Kf5
    25/55	00:05	  95,754,937	18,386,000	 0.00	Bf1 Qf8 Bh3+ Kf3 Bg2+ Kg4 d5 Qg7 Ne4 Kf5 Ng5 Qe5 Kh3 Kg6 Bf3 Qf5+ Kh2 Qe5 Bg2 Kf5
    25/55+	00:06	 114,921,153	18,482,000	+0.07	Be2+
    25/63+	00:15	 161,748,596	10,841,000	+11.40	Be2+
    25/63	00:15	 166,731,832	10,495,000	+12.33	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qg7 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kd6 g4 Ke5 gxh5 Kf6 h6 Kg6 Kg4 a5 bxa5 Kh7 a6 Kg6 a7
    25/63	00:16	 166,733,601	10,495,000	+12.33	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qg7 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kd6 g4 Ke5 gxh5 Kf6 h6 Kg6 Kg4 a5 bxa5 Kh7 a6 Kg6 a7
    26/63+	00:17	 170,847,453	10,089,000	+12.40	Be2+
    26/63-	00:17	 171,043,173	10,072,000	+12.33	Be2+ Kf5
    26/63+	00:17	 171,567,218	9,996,000	+12.40	Be2+
    26/63+	00:17	 173,341,264	9,888,000	+12.55	Be2+
    26/63-	00:17	 173,716,620	9,880,000	+12.43	Be2+ Kf5
    26/63-	00:17	 173,874,781	9,865,000	+10.69	Be2+ Kf5
    26/63+	00:17	 174,273,656	9,833,000	+11.19	Be2+
    26/63+	00:17	 174,611,213	9,810,000	+12.17	Be2+
    26/63-	00:17	 174,967,836	9,786,000	+11.35	Be2+ Kf5
    26/63+	00:18	 175,185,978	9,781,000	+12.39	Be2+
    26/63+	00:19	 182,592,352	9,485,000	+14.38	Be2+
    26/63	00:19	 185,697,641	9,410,000	+14.38	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qh8 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kd4 g4 Ke5 gxh5 Kf5 h6 Kg6 Kg4 Kh7 Kf5 a5 bxa5 Kg8 a6
    26/63	00:19	 185,698,657	9,411,000	+14.38	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qh8 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kd4 g4 Ke5 gxh5 Kf5 h6 Kg6 Kg4 Kh7 Kf5 a5 bxa5 Kg8 a6
    27/63+	00:21	 193,614,706	9,050,000	+14.45	Be2+
    27/63-	00:21	 193,964,366	9,027,000	+14.38	Be2+ Kf5
    27/63-	00:21	 194,577,549	9,011,000	+12.61	Be2+ Kf5
    27/63+	00:21	 194,884,560	9,004,000	+13.03	Be2+
    27/63+	00:21	 195,427,371	9,000,000	+13.80	Be2+
    27/63-	00:21	 195,789,396	9,000,000	+12.70	Be2+ Kf5
    27/63+	00:21	 196,385,681	8,988,000	+13.97	Be2+
    27/63+	00:25	 217,329,514	8,561,000	+17.55	Be2+
    27/65	00:28	 238,566,291	8,445,000	+22.96	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qh8 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Kd5 g4 Ke6 gxh5 Kf6 h6 Kg6 Kg3 Kh7 Kg4 Kg6 h7 Kf6 h8Q+ Ke6 Qc8+ Ke5 Qxc7+ Ke4 Qf4+ Kd3
    27/65	00:28	 238,569,238	8,445,000	+22.96	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qh8 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Kd5 g4 Ke6 gxh5 Kf6 h6 Kg6 Kg3 Kh7 Kg4 Kg6 h7 Kf6 h8Q+ Ke6 Qc8+ Ke5 Qxc7+ Ke4 Qf4+ Kd3
    28/65	00:38	 277,376,652	7,233,000	+92.00	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 a5 b5 a4 Kg2 Qf6 Nd3 Qf1+ Kxf1 Kxg3 b6 a3 Bd5 a2 Bxa2 c6 b7 Kf3 b8Q Ke3 Qe8+ Kxd3 Qxh5 Kc3 Qe8 Kd2 Qxc6 Kc3 Qe6 Kb4 Qb6+
    28/65	00:38	 277,405,788	7,232,000	+92.00	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 a5 b5 a4 Kg2 Qf6 Nd3 Qf1+ Kxf1 Kxg3 b6 a3 Bd5 a2 Bxa2 c6 b7 Kf3 b8Q Ke3 Qe8+ Kxd3 Qxh5 Kc3 Qe8 Kd2 Qxc6 Kc3 Qe6 Kb4 Qb6+
    29/65	00:39	 282,675,894	7,119,000	+92.00	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qxe4 Nf6+ Kf5 Nxe4 c6 Ng5 Kf6 g4 hxg4 Kg3 Ke7 Kxg4 Ke8 h5 Kf8 h6 Kg8 Kf5 Kf8 Ne6+ Kg8 Kg6 Kh8 Ng5 Kg8 h7+ Kf8 h8Q+ Ke7
    29/65	00:39	 282,699,331	7,118,000	+92.00	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qxe4 Nf6+ Kf5 Nxe4 c6 Ng5 Kf6 g4 hxg4 Kg3 Ke7 Kxg4 Ke8 h5 Kf8 h6 Kg8 Kf5 Kf8 Ne6+ Kg8 Kg6 Kh8 Ng5 Kg8 h7+ Kf8 h8Q+ Ke7
    30/65	00:40	 283,902,528	7,098,000	+92.00	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qxe4 Nf6+ Kf5 Nxe4 c6 Ng5 Kf6 g4 hxg4 Kg3 Ke7 Kxg4 Ke8 h5 Kf8 h6 Kg8 Kf5 Kf8 Ne6+ Kg8 Kg6 Kh8 Ng5 Kg8 h7+ Kf8 h8Q+ Ke7
    30/65	00:40	 283,932,382	7,097,000	+92.00	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qxe4 Nf6+ Kf5 Nxe4 c6 Ng5 Kf6 g4 hxg4 Kg3 Ke7 Kxg4 Ke8 h5 Kf8 h6 Kg8 Kf5 Kf8 Ne6+ Kg8 Kg6 Kh8 Ng5 Kg8 h7+ Kf8 h8Q+ Ke7
    31/65	00:43	 299,920,624	6,903,000	+92.04	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 a5 b5 a4 Kg2 Qf6 Nd3 Qf1+ Kxf1 Kxg3 b6 a3 Bd5 a2 Bxa2 c6 b7 Kf3 b8Q Ke3 Qe8+ Kxd3 Qxh5 Kc3 Qe8 Kd2 Qxc6 Kc3 Qe6 Kb4
    31/65	00:43	 299,985,573	6,902,000	+92.04	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 a5 b5 a4 Kg2 Qf6 Nd3 Qf1+ Kxf1 Kxg3 b6 a3 Bd5 a2 Bxa2 c6 b7 Kf3 b8Q Ke3 Qe8+ Kxd3 Qxh5 Kc3 Qe8 Kd2 Qxc6 Kc3 Qe6 Kb4
    32/74	01:09	 441,522,426	6,394,000	+100.96	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qxe4 Nf6+ Kf5 Nxe4 Ke6 Kh3 Kf5 Ng5 Kf6 g4 Ke7 gxh5 Kd7 h6 Kc6 h7 Kb5 h8Q Kc4 Qc8 Kxd4 Qxc7 Kc3 Qa5 Kd2 Qxa6 Kc2 c6 Kb1 c7
    32/74	01:09	 441,599,269	6,394,000	+100.96	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qxe4 Nf6+ Kf5 Nxe4 Ke6 Kh3 Kf5 Ng5 Kf6 g4 Ke7 gxh5 Kd7 h6 Kc6 h7 Kb5 h8Q Kc4 Qc8 Kxd4 Qxc7 Kc3 Qa5 Kd2 Qxa6 Kc2 c6 Kb1 c7
    33/81	01:44	 638,731,173	6,113,000	+148.78	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qxe4 Nf6+ Kf5 Nxe4 Ke6 Kh3 Kf5 Ng5 Kf6 g4 c6 gxh5 Kg7 h6+ Kxh6 Kg4 Kg7 d5 Kf6 Ne4+ Ke5 dxc6 Kd4 c7 Kc4 c8Q Kd3 Qxa6+ Kc2 c6 Kb2
    33/81	01:44	 638,812,441	6,113,000	+148.78	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qxe4 Nf6+ Kf5 Nxe4 Ke6 Kh3 Kf5 Ng5 Kf6 g4 c6 gxh5 Kg7 h6+ Kxh6 Kg4 Kg7 d5 Kf6 Ne4+ Ke5 dxc6 Kd4 c7 Kc4 c8Q Kd3 Qxa6+ Kc2 c6 Kb2
    34/81	02:07	 746,891,520	5,873,000	+148.79	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qf6 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kf5 g4+ Kg6 gxh5+ Kh6 Kg4 Kg7 Kf5 Kf7 h6 Kg8 h7+ Kg7 h8Q+ Kxh8 Ke6
    34/81	02:07	 747,114,980	5,874,000	+148.79	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qf6 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kf5 g4+ Kg6 gxh5+ Kh6 Kg4 Kg7 Kf5 Kf7 h6 Kg8 h7+ Kg7 h8Q+ Kxh8 Ke6
    35/81	02:25	 818,088,610	5,638,000	+148.79	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qf6 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kf6 g4 Kg7 gxh5 Kh6 Kg4 Kg7 h6+ Kh7 Kf5 Kg8 h7+ Kg7 h8Q+ Kxh8 Ke6
    35/81	02:25	 818,174,428	5,638,000	+148.79	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qf6 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kf6 g4 Kg7 gxh5 Kh6 Kg4 Kg7 h6+ Kh7 Kf5 Kg8 h7+ Kg7 h8Q+ Kxh8 Ke6
    36/81	02:53	 940,942,284	5,413,000	+148.79	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qf6 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kf6 g4 Kg7 gxh5 Kh6 Kg4 Kg7 h6+ Kh7 Kf5 Kg8 h7+ Kg7 h8Q+ Kxh8 Ke6
    36/81	02:53	 941,105,954	5,413,000	+148.79	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qf6 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kf6 g4 Kg7 gxh5 Kh6 Kg4 Kg7 h6+ Kh7 Kf5 Kg8 h7+ Kg7 h8Q+ Kxh8 Ke6
    37/81	03:24	1,109,448,116	5,420,000	+148.79	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qf6 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kf6 g4 Kg7 gxh5 Kh6 Kg4 Kg7 h6+ Kh7 Kf5 Kg8 h7+ Kg7 h8Q+ Kxh8 Ke6
    37/81	03:24	1,110,397,812	5,421,000	+148.79	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qf6 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kf6 g4 Kg7 gxh5 Kh6 Kg4 Kg7 h6+ Kh7 Kf5 Kg8 h7+ Kg7 h8Q+ Kxh8 Ke6
    38/81	05:06	1,641,217,869	5,354,000	+148.80	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qf6 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kf5 g4+ hxg4+ Kg3 Ke6 Kxg4 Ke5 Kg5 Ke6 Kf4 Kd6 Kf5 Ke7 b5 a5 b6 Kd6
    38/81	05:06	1,642,358,852	5,356,000	+148.80	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qf6 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kf5 g4+ hxg4+ Kg3 Ke6 Kxg4 Ke5 Kg5 Ke6 Kf4 Kd6 Kf5 Ke7 b5 a5 b6 Kd6
    39/81	08:22	2,493,599,411	4,959,000	+148.80	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qf6 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kf5 g4+ hxg4+ Kg3 Ke6 Kxg4 Ke5 Kg5 Ke6 Kf4 Kd6 Kf5 Ke7 b5 a5 b6 Kd6 bxc7
    39/81	08:23	2,495,261,180	4,961,000	+148.80	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qf6 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf5 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kf5 g4+ hxg4+ Kg3 Ke6 Kxg4 Ke5 Kg5 Ke6 Kf4 Kd6 Kf5 Ke7 b5 a5 b6 Kd6 bxc7
And stockfish cannot solve it even if you let it analyze the position after the winning move for ten minutes before trying to analyze the original problem.

Which is to say that SF also cannot tell that this position is dead lost even after quite a long think:
[d]8/2p1q3/p3P3/2P4p/1P1P2kP/2N3P1/4B2K/8 b - -
Nice position. Funny mating position at Kg4, forcing black to give up Q.
Thanks for sharing.
I told my wife that a husband is like a fine wine; he gets better with age. The next day, she locked me in the cellar.

Dann Corbit
Posts: 10207
Joined: Wed Mar 08, 2006 7:57 pm
Location: Redmond, WA USA
Contact:

Re: Bugaboo position for SF

Post by Dann Corbit » Fri Mar 30, 2018 4:53 am

MikeGL wrote: Nice position. Funny mating position at Kg4, forcing black to give up Q.
Thanks for sharing.
Reference:
http://www.yacpdb.org/#search/ODJwMXEzc ... LzEvMA==/1
Taking ideas is not a vice, it is a virtue. We have another word for this. It is called learning.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.

Jhoravi
Posts: 248
Joined: Wed May 08, 2013 4:49 am

Re: Bugaboo position for SF

Post by Jhoravi » Fri Mar 30, 2018 5:20 am

I rememer this very interesting position about two decades ago because I let ChessMater4000 analyze it that led me to conlude that engines won't get a slight clue about it in many more years.

BTW the position is taken from Capablanca's book "My last lectures"

peter
Posts: 1786
Joined: Sat Feb 16, 2008 6:38 am
Full name: Peter Martan

Re: Bugaboo position for SF

Post by peter » Fri Mar 30, 2018 7:28 am

Hi Dann!
Dann Corbit wrote:Stockfish has a truly terrible time with this position:
[d]8/2p1q3/p3P3/2P4p/1PBP2kP/2N3P1/7K/8 w - -
Houdini solves it quickly:
Troitzky 1928.
Houdini seems to have a special good nullmove verification for such endgames. (Zugzwang arises fully not until move nr. 4.) Maybe it's about LMRs too.
Sting and MateFinder do solve quickly.

CFish succeeds too:

Code: Select all

8/2p1q3/p3P3/2P4p/1PBP2kP/2N3P1/7K/8 w - - 0 1

Analysis by Cfish R1 x64 POPCNT:

...
1.Bf1 c6 2.d5 Kf3 3.Bg2+ Kf2 4.Ne4+ Ke1 5.dxc6 Qxe6 6.Ng5 Qg4 7.Bh3 Qe2+ 8.Bg2 Qg4 
  =  (0.00)   Depth: 48/17   00:01:01  1256MN
1.Be2+ 
  =  (0.17 ++)   Depth: 49/60   00:01:37  2322MN
1.Be2+ 
  =  (0.25 ++)   Depth: 49/62   00:01:37  2327MN
...
1.Be2+ 
  +-  (1.91 ++)   Depth: 49/66   00:01:48  2652MN
...
1.Be2+ 
  +-  (15.63 ++)   Depth: 49/93   00:04:20  8649MN


Peter.

peter
Posts: 1786
Joined: Sat Feb 16, 2008 6:38 am
Full name: Peter Martan

Re: Bugaboo position for SF

Post by peter » Fri Mar 30, 2018 8:27 am

24 threads of 3GHz 12core Intel CPU, 32G hash, no tbs:

8/2p1q3/p3P3/2P4p/1PBP2kP/2N3P1/7K/8 w - - 0 1

Analysis by Stockfish 260318 64 POPCNT:

1.Bf1 c6 2.d5 Kf3 3.dxc6 Qxe6 4.Bg2+ Kf2 5.Ne4+ Ke2 6.Ng5 Qf5 7.Be4 Qe5 8.Bg2 Ke3 9.Nh3 Qg7 10.Nf4 Kf2 11.Nxh5 Qg4 12.c7 Qc8 13.Bh3 Qxc7 14.Nf4 Qg7 15.Nd3+ Ke2 16.Nf4+ Kf2
= (0.00) Depth: 49/33 00:00:57 1616MN
1.Be2+
= (0.07 ++) Depth: 50/62 00:01:06 1869MN
1.Be2+
= (0.15 ++) Depth: 50/65 00:01:09 1949MN
...
1.Be2+
+- (5.66 ++) Depth: 50/92 00:01:22 2358MN
...
1.Be2+
+- (25.06 ++) Depth: 50/92 00:03:02 6134MN

Restarted GUI 3 times, second was 3'22, third 1'10, always depth 50.
Peter.

TommyTC
Posts: 18
Joined: Thu Mar 30, 2017 6:52 am

Re: Bugaboo position for SF

Post by TommyTC » Fri Mar 30, 2018 7:32 pm

Dann Corbit wrote:Stockfish has a truly terrible time with this position:
[d]8/2p1q3/p3P3/2P4p/1PBP2kP/2N3P1/7K/8 w - -

And stockfish cannot solve it even if you let it analyze the position after the winning move for ten minutes before trying to analyze the original problem.
On my computer (6 threads and full 6 piece EGTB) after 6 minutes, SF (relatively recent: 070318), at depth 55 finds 1. Be2 with eval 9+.

MikeB
Posts: 3559
Joined: Thu Mar 09, 2006 5:34 am
Location: Pen Argyl, Pennsylvania

Re: Bugaboo position for SF

Post by MikeB » Sat Mar 31, 2018 3:02 am

TommyTC wrote:
Dann Corbit wrote:Stockfish has a truly terrible time with this position:
[d]8/2p1q3/p3P3/2P4p/1PBP2kP/2N3P1/7K/8 w - -

And stockfish cannot solve it even if you let it analyze the position after the winning move for ten minutes before trying to analyze the original problem.
On my computer (6 threads and full 6 piece EGTB) after 6 minutes, SF (relatively recent: 070318), at depth 55 finds 1. Be2 with eval 9+.
Yesterday McBrain was clueless in this position, made some changes and today it is brilliant. Dann - will send you the sources if you could make some exe's - thanks!

18 threads on 12 core Mac Pro with 8GB hash

Code: Select all

dep	score	nodes	time	(not shown:  tbhits	knps	seldep)
 47	+132.63 	8.86G	4:42.01	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qf6 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf3 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kf5 g4+ hxg4+ Kg3 Ke6 Kxg4 Kf6 h5 Kf7 h6 Kg8 Kf5 Kf7 h7 Kg7 h8=Q+ Kxh8 
 46	+132.63 	8.85G	4:41.55	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qf6 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf3 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kf5 g4+ hxg4+ Kg3 Ke6 Kxg4 Kf6 h5 Kf7 h6 Kg8 Kf5 Kf7 h7 Kg7 h8=Q+ Kxh8 
 45	+132.63 	8.72G	4:37.67	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qf6 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf3 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kf5 g4+ hxg4+ Kg3 Ke6 Kxg4 Kf6 h5 Kf7 h6 Kg8 Kf5 Kf7 h7 Kg7 h8=Q+ Kxh8 
 44	+132.63 	8.43G	4:31.20	Be2+ Kf5 Nd5 Qxe6 Bd3+ Kg4 Be4 Qh6 Nf4 Qf6 Nd3 Qxd4 c6 Qxe4 Nf2+ Kf3 Nxe4 Kxe4 Kg2 Ke5 Kf3 Kf5 g4+ hxg4+ Kg3 Kg6 Kxg4 Kf6 h5 Kf7 h6 Kg8 h7+ Kh8 Kf5 Kg7 h8=Q+ Kxh8 
 44	+132.19!	5.89G	3:25.74	Be2+! 
 44	+79.90!	5.75G	3:21.79	Be2+! 
 44	+63.55!	5.09G	3:03.46	Be2+! 
 44	+50.48!	4.48G	2:45.54	Be2+! 
 44	+40.04!	4.45G	2:44.44	Be2+! 
 44	+31.71!	4.39G	2:42.62	Be2+! 
 44	+25.06!	4.23G	2:37.57	Be2+! 
 44	+19.75!	4.01G	2:30.47	Be2+! 
 44	+15.52!	3.75G	2:21.84	Be2+! 
 44	+12.16!	3.57G	2:16.38	Be2+! 
 44	+9.48!	3.46G	2:12.80	Be2+! 
 44	+7.35!	3.27G	2:06.18	Be2+! 
 44	+5.66!	3.15G	2:01.64	Be2+! 
 44	+4.33!	3.09G	1:59.49	Be2+! 
 44	+3.28!	3.07G	1:58.82	Be2+! 
 44	+2.45!	3.07G	1:58.70	Be2+! 
 44	+1.81!	3.01G	1:56.76	Be2+! 
 44	+1.31!	2.98G	1:55.48	Be2+! 
 44	+0.92!	2.94G	1:54.05	Be2+! 
 44	+0.63!	2.94G	1:54.04	Be2+! 
 44	+0.42!	2.94G	1:54.00	Be2+! 
 44	+0.26!	2.78G	1:48.04	Be2+! 
 44	+0.15!	2.76G	1:47.38	Be2+! 
 44	+0.07!	2.74G	1:46.51	Be2+! 
 43	  0.00 	2.03G	1:19.85	Bf1 c6 d5 Qf6 Bh3+ Kf3 Bg2+ Ke3 Ne4 Qe5 dxc6 Qxe6 Nd6 Kf2 c7 Qg4 Ne4+ Ke1 Nf6 Qc8 Nxh5 Qxc7 Nf4 Kf2 c6 Qg7 Nd3+ Ke3 Nf4 Kf2 
 42	  0.00 	1.48G	0:58.86	Bf1 c6 d5 Kf3 Bg2+ Kf2 Ne4+ Ke1 d6 Qxe6 Bf3 Qa2+ Bg2 Qe6 
 41	  0.00 	1.13G	0:45.46	Bf1 c6 d5 Kf3 Bg2+ Kf2 Ne4+ Ke1 d6 Qxe6 Bf3 Qa2+ Bg2 Qe6 
 40	  0.00 	764.3M	0:31.26	Bf1 c6 d5 Qf6 Bh3+ Kf3 Bg2+ Ke3 Ne4 Qe5 dxc6 Qxe6 Nd6 Kf2 c7 Qg4 Ne4+ Ke1 Nf6 Qc8 Nxh5 Qxc7 Nf4 Kf2 c6 Qg7 Nd3+ Ke3 Nf4 Kf2 
 39	  0.00 	665.8M	0:27.37	Bf1 c6 d5 Kf3 Bg2+ Kf2 Ne4+ Ke1 d6 Qxe6 Bf3 Qa2+ Bg2 Qe6 
 38	  0.00 	454.3M	0:18.84	Bf1 c6 d5 Kf3 Bg2+ Kf2 Ne4+ Ke1 d6 Qxe6 Bf3 Qa2+ Bg2 Qe6 
 37	  0.00 	322.0M	0:13.47	Bf1 c6 d5 Kf3 Bg2+ Kf2 Ne4+ Ke1 d6 Qxe6 Bf3 Qa2+ Bg2 Qe6 
 36	  0.00 	278.2M	0:11.68	Bf1 c6 d5 Kf3 Bg2+ Kf2 Ne4+ Ke1 d6 Qxe6 Bf3 Qa2+ Bg2 Qe6 
 35	  0.00 	178.8M	0:07.46	Bf1 Kf3 Bg2+ Kf2 d5 c6 Ne4+ Ke1 d6 Qxe6 Bf3 Qa2+ Bg2 Qe6 
 34	  0.00 	166.3M	0:06.96	Bf1 c6 d5 Kf3 Bg2+ Kf2 Ne4+ Ke1 d6 Qxe6 Bf3 Qa2+ Bg2 Qe6 
 33	  0.00 	82.9M  	0:03.34	Bf1 c6 d5 Kf3 Bg2+ Kf2 Ne4+ Ke1 d6 Qxe6 Bf3 Qa2+ Bg2 Qe6 
 32	  0.00 	34.1M  	0:01.36	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 d5 Kf5 Ng5 Qe5 Bf3 Kg6 Nf7 Qe3 d6 cxd6 cxd6 Kg7 d7 Qxf3 d8=Q Qe2+ Kg1 Qe1+ Kh2 Qf2+ Kh3 Qf1+ Kh2 Qf2+ 
 31	  0.00 	27.3M  	0:01.09	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 d5 Kf5 Ng5 Qe5 Bf3 Kg6 Nf7 Qe3 d6 cxd6 cxd6 Kg7 d7 Qxf3 d8=Q Qe2+ Kg1 Qe1+ Kh2 Qf2+ Kh3 Qf1+ Kh2 Qf2+ 
 30	  0.00 	21.3M  	0:00.85	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 d5 Kf5 Ng5 Qe5 Bf3 Kg6 Nf7 Qe3 d6 cxd6 cxd6 Kg7 d7 Qxf3 d8=Q Qe2+ Kg1 Qe1+ Kh2 Qf2+ Kh3 Qf1+ Kh2 Qf2+ 
 29	  0.00 	20.2M  	0:00.81	Bf1 Qf8 Bh3+ Kf3 Bg2+ Kg4 d5 Qg7 Ne4 Kf5 Ng5 Qe5 Bf3 Kg6 Nf7 Qe3 d6 cxd6 cxd6 Kg7 d7 Qxf3 d8=Q Qe2+ Kg1 Qe1+ Kh2 Qf2+ Kh3 Qf1+ Kh2 Qf2+ 
 28	  0.00 	16.9M  	0:00.68	Bf1 Qf8 Bh3+ Kf3 Bg2+ Kg4 d5 Qg7 Ne4 Kf5 Ng5 Qe5 Bf3 Kg6 Nf7 Qe3 d6 cxd6 cxd6 Kg7 d7 Qxf3 d8=Q Qe2+ Kg1 Qe1+ Kh2 Qf2+ Kh3 Qf1+ Kh2 Qf2+ 
 27	  0.00 	12.0M  	0:00.48	Bf1 Qf8 Bh3+ Kf3 Bg2+ Kg4 d5 Qg7 Ne4 Kf5 Ng5 Qe5 Bf3 Kg6 Nf7 Qe3 d6 cxd6 cxd6 Kg7 d7 Qxf3 d8=Q Qe2+ Kg1 Qe1+ Kh2 Qf2+ Kh3 Qf1+ Kh2 Qf2+ 
 26	  0.00 	10.8M  	0:00.43	Bf1 Qf8 Bh3+ Kf3 Bg2+ Kg4 d5 Qg7 Ne4 Kf5 Ng5 Qe5 Bf3 Kg6 Nf7 Qe3 d6 cxd6 cxd6 Kg7 d7 Qxf3 d8=Q Qe2+ Kg1 Qe1+ Kh2 Qf2+ Kh3 Qf1+ Kh2 Qf2+ 
 25	  0.00 	9.18M  	0:00.36	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 d5 Kf5 Ng5 Qe5 Bf3 Kg6 Nf7 Qe3 d6 cxd6 cxd6 Kg7 d7 Qxf3 d8=Q Qe2+ Kg1 Qe1+ Kh2 Qf2+ Kh3 Qf1+ Kh2 Qf2+ 
 24	  0.00 	6.46M  	0:00.25	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 d5 Kf5 Ng5 Qe5 Bf3 Kg6 Nf7 Qe3 d6 cxd6 cxd6 Kg7 d7 Qxf3 d8=Q Qe2+ Kg1 Qe1+ Kh2 Qf2+ Kh3 Qf1+ Kh2 Qf2+ 
 23	  0.00 	6.09M  	0:00.24	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 d5 Kf5 Ng5 Qe5 Bf3 Kg6 Nf7 Qe3 d6 cxd6 cxd6 Kg7 d7 Qxf3 d8=Q Qe2+ Kg1 Qe1+ Kh2 Qf2+ Kh3 Qf1+ Kh2 Qf2+ 
 22	  0.00 	5.51M  	0:00.22	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 d5 Kf5 Ng5 Qe5 Bf3 Kg6 Nf7 Qe3 d6 cxd6 cxd6 Kg7 d7 Qxf3 d8=Q Qe2+ Kg1 Qe1+ Kh2 Qf2+ Kh3 Qf1+ Kh2 Qf2+ 
 21	  0.00 	4.98M  	0:00.20	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 d5 Kf5 Ng5 Qe5 Bf3 Kg6 Nf7 Qe3 d6 cxd6 cxd6 Kg7 d7 Qxf3 d8=Q Qe2+ Kg1 Qe1+ Kh2 Qf2+ Kh3 Qf1+ Kh2 Qf2+ 
 20	  0.00 	4.17M  	0:00.16	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 d5 Kf5 Ng5 Qe5 Bf3 Kg6 Bg2 Kf5 
 19	  0.00 	3.44M  	0:00.14	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 d5 Kf5 Ng5 Qe5 Bf3 Kg6 Kg2 Qb2+ Kh3 Qe5 Bg2 Kg7 Bf3 Kg6 
 18	+0.04 	3.31M  	0:00.13	Bf1 Qf8 Bh3+ Kf3 Bg2+ Kg4 d5 Qg7 Ne4 Kf5 Bf3 Qe5 Kg2 Kg6 Ng5 Qb2+ Kh3 Qe5 Bg2 Qf5+ Kh2 Qe5 Nh3 Kf5 Nf4 Kf6 
 17	  0.00 	2.64M  	0:00.11	Bf1 Qf8 Bh3+ Kf3 Bg2+ Kg4 Bh3+ 
 16	+0.61 	1.98M  	0:00.08	Bf1 Qf8 Bh3+ Kf3 Bg2+ Kg4 d5 Qg7 Ne4 Kf5 Ng5 Qe5 c6 Qd6 Nf7 Qe7 Kh3 Kf6 Bf3 Kg6 Be4+ Kf6 
 15	+0.38 	1.61M  	0:00.07	Bf1 Qf8 Bh3+ Kf3 Bg2+ Kg4 d5 Qg7 Ne4 Kf5 Ng5 Qe5 c6 Qd6 Nf7 Qe7 Kh3 Kf6 Bf3 Qxb4 d6 Kxe6 
 14	+0.15 	1.34M  	0:00.06	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 d5 Kf5 Ng5 Qe5 Kh3 Kg6 Nf7 Qe1 Nd8 Qxb4 e7 Qg4+ Kh2 Qd7 d6 cxd6 cxd6 Kf6 Nc6 Qe6 
 13	+0.56 	946825	0:00.04	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qd8 d5 Kf5 Kh3 Ke5 Ng5 Qb8 Bf3 Qb5 Bxh5 Kxd5 Bf3+ Ke5 
 12	+0.30 	627763	0:00.03	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 d5 Kf5 Ng5 Qe5 Kh3 Kg6 Be4+ Kf6 
 11	+0.29 	255998	0:00.01	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qd8 d5 Kf5 Nf2 Kf6 Nd3 Qb8 Bf3 Qh8 
 10	+0.40 	167569	0:00.01	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qd8 Ng5 Kf5 d5 Qf6 
  9	+0.10 	153823	0:00.01	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qd8 Ng5 Kf5 d5 Kf6 
  8	+0.09 	46123  	0:00.00	Ne4 Kf5 Ng5 c6 Bxa6 Qf6 Be2 Qxd4 
  7	+0.87 	26720  	0:00.00	d5 a5 Be2+ Kf5 bxa5 Qxc5 a6 Ke5 e7 Qxe7 
  6	+0.38 	20360  	0:00.00	Ne4 Kf5 Ng5 Qf6 d5 Qb2+ Kh3 
  5	+0.88 	3922    	0:00.00	d5 a5 Be2+ Kf5 bxa5 Qxc5 
  4	+0.45 	1259    	0:00.00	Be2+ Kf5 d5 a5 
  3	+0.31 	1033    	0:00.00	Ne2 c6 d5 
  2	+0.57 	618      	0:00.00	d5 a5 Be2+ Kf5 
  1	+0.45 	202      	0:00.00	d5 
  0	# 
here's second run and it does appear a little bit of luck can creep in..:

Code: Select all

dep	score	nodes	time	(not shown:  tbhits	knps	seldep)
 41	+132.21!	3.18G	1:44.69	Be2+! 
 41	+79.91!	3.10G	1:42.15	Be2+! 
 41	+40.05!	2.25G	1:17.98	Be2+! 
 41	+31.72!	2.16G	1:15.64	Be2+! 
 41	+25.07!	2.09G	1:13.13	Be2+! 
 41	+19.76!	1.91G	1:07.54	Be2+! 
 41	+15.53!	1.73G	1:02.24	Be2+! 
 41	+12.17!	1.60G	0:58.10	Be2+! 
 41	+9.49!	1.53G	0:56.09	Be2+! 
 41	+7.36!	1.49G	0:54.68	Be2+! 
 41	+5.67!	1.46G	0:53.62	Be2+! 
 41	+4.34!	1.44G	0:52.99	Be2+! 
 41	+3.29!	1.44G	0:52.98	Be2+! 
 41	+2.46!	1.43G	0:52.73	Be2+! 
 41	+1.82!	1.24G	0:45.80	Be2+! 
 41	+1.32!	1.24G	0:45.75	Be2+! 
 41	+0.93!	1.24G	0:45.72	Be2+! 
 41	+0.63!	1.24G	0:45.71	Be2+! 
 41	+0.42!	1.23G	0:45.70	Be2+! 
 41	+0.26!	1.23G	0:45.64	Be2+! 
 41	+0.15!	1.21G	0:44.94	Be2+! 
 41	+0.07!	1.20G	0:44.49	Be2+! 
 40	  0.00 	753.8M	0:27.81	Bf1 c6 d5 Kf3 Bg2+ Kf2 Ne4+ Ke1 dxc6 Qxe6 Ng5 Qc8 Nh3 Qg4 Nf4 Kf2 Nd3+ Ke3 Nf4 Kf2 
 39	  0.00 	629.9M	0:23.27	Bf1 Kf3 d5 c6 Bg2+ Kf2 Ne4+ Ke1 dxc6 Qxe6 Ng5 Qc8 Nh3 Qg4 Nf4 Kf2 Nd3+ Ke3 Nf4 Kf2 
 38	  0.00 	505.8M	0:18.74	Bf1 Kf3 d5 c6 Bg2+ Kf2 Ne4+ Ke1 dxc6 Qxe6 Ng5 Qc8 Nh3 Qg4 Nf4 Kf2 Nd3+ Ke3 Nf4 Kf2 
 37	  0.00 	450.3M	0:16.70	Bf1 c6 d5 Kf3 Bg2+ Kf2 Ne4+ Ke1 dxc6 Qxe6 Ng5 Qc8 Nh3 Qg4 Nf4 Kf2 Nd3+ Ke3 Nf4 Kf2 
 36	  0.00 	409.0M	0:15.20	Bf1 c6 d5 Kf3 Bg2+ Kf2 Ne4+ Ke1 dxc6 Qxe6 Ng5 Qc8 Nh3 Qg4 Nf4 Kf2 Nd3+ Ke3 Nf4 Kf2 
 35	  0.00 	263.5M	0:09.82	Bf1 c6 d5 Kf3 Bg2+ Kf2 Ne4+ Ke1 dxc6 Qxe6 Ng5 Qc8 Nh3 Qg4 Nf4 Kf2 Nd3+ Ke3 Nf4 Kf2 
 34	  0.00 	218.0M	0:08.15	Bf1 c6 d5 Kf3 Bg2+ Kf2 Ne4+ Ke1 dxc6 Qxe6 Ng5 Qc8 Nh3 Qg4 Nf4 Kf2 Nd3+ Ke3 Nf4 Kf2 
 33	  0.00 	168.7M	0:06.31	Bf1 Kf3 d5 c6 Bg2+ Kf2 Ne4+ Ke1 dxc6 Qxe6 Ng5 Qc8 Nh3 Qg4 Nf4 Kf2 Nd3+ Ke3 Nf4 Kf2 
 32	  0.00 	114.7M	0:04.32	Bf1 Kf3 d5 c6 Bg2+ Kf2 Ne4+ Ke1 dxc6 Qxe6 Ng5 Qc8 Nh3 Qg4 Nf4 Kf2 Nd3+ Ke3 Nf4 Kf2 
 31	  0.00 	98.1M  	0:03.70	Bf1 Kf3 d5 c6 Bg2+ Kf2 Ne4+ Ke1 dxc6 Qxe6 Ng5 Qc8 Nh3 Qg4 Nf4 Kf2 Nd3+ Ke3 Nf4 Kf2 
 30	  0.00 	84.7M  	0:03.20	Bf1 Kf3 d5 c6 Bg2+ Kf2 Ne4+ Ke1 dxc6 Qxe6 Ng5 Qc8 Nh3 Qg4 Nf4 Kf2 Nd3+ Ke3 Nf4 Kf2 
 29	  0.00 	62.8M  	0:02.37	Bf1 Kf3 d5 c6 Bg2+ Kf2 Ne4+ Ke1 dxc6 Qxe6 Ng5 Qc8 Nh3 Qg4 Nf4 Kf2 Nd3+ Ke3 Nf4 Kf2 
 28	  0.00 	31.3M  	0:01.20	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 d5 Kf5 Ng5 Qe5 c6 Qd6 Nf7 Qe7 Bf3 Kg6 Ne5+ Kf6 Nf7 Kg6 
 27	  0.00 	15.1M  	0:00.59	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 d5 Kf5 Ng5 Qe5 c6 Qd6 Nf7 Qe7 Bf3 Kg6 Ne5+ Kf6 Nf7 Kg6 
 26	  0.00 	12.5M  	0:00.49	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 d5 Kf5 Ng5 Qe5 c6 Qd6 Nf7 Qe7 Bf3 Kg6 Ne5+ Kf6 Nd3 Qh7 Nf4 Qc2+ Kh3 Qf5+ Kg2 Qc2+ Kh3 
 25	  0.00 	8.94M  	0:00.35	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 d5 Kf5 Ng5 Qe5 c6 Qd6 Nf7 Qe7 Bf3 Kg6 Ne5+ Kf6 Nd3 Qh7 Nf4 Qc2+ Kh3 Qf5+ Kg2 Qc2+ Kh3 
 24	  0.00 	8.23M  	0:00.32	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 d5 Kf5 Ng5 Qe5 c6 Qd6 Nf7 Qe7 Bf3 Kg6 Ne5+ Kf6 Nd3 Qh7 Nf4 Qc2+ Kh3 Qf5+ Kg2 Qc2+ Kh3 
 23	  0.00 	8.13M  	0:00.32	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 Bh3+ Kf3 Bg2+ Kg4 
 22	  0.00 	6.01M  	0:00.24	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 d5 Kf5 Ng5 Qe5 c6 Qd6 Nf7 Qe7 Bf3 Kg6 Ne5+ Kf6 Nd3 Qh7 Nf4 Qc2+ Kh3 Qf5+ Kg2 Qc2+ Kh3 
 21	  0.00 	5.91M  	0:00.23	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 d5 Kf5 Ng5 Qe5 c6 Qd6 Nf7 Qe7 Bf3 Kg6 Ne5+ Kf6 Nd3 Qh7 Nf4 Qc2+ Kh3 Qf5+ Kg2 Qc2+ Kh3 
 20	  0.00 	5.62M  	0:00.22	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 d5 Kf5 Ng5 Qe5 c6 Qd6 Nf7 Qe7 Bf3 Kg6 Ne5+ Kf6 Nd3 Qh7 Nf4 Qc2+ Kh3 Qf5+ Kg2 Qc2+ Kh3 
 19	  0.00 	4.01M  	0:00.16	Bf1 Qf8 Bh3+ Kf3 d5 Qg7 Bg2+ Kg4 Ne4 Kf5 Ng5 Qe5 c6 Qd6 Nf7 Qe7 Bf3 Kf6 Kh3 Kg6 Kh2 Kf6 
 18	  0.00 	3.69M  	0:00.15	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 d5 Kf5 Ng5 Qe5 c6 Qd6 Nf7 Qe7 Bf3 Kf6 Bxh5 Qxb4 d6 Qd2+ Kh3 Qe1 e7 Qh1+ Kg4 Qe4+ Kh3 Qh1+ 
 17	  0.00 	3.36M  	0:00.13	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qg7 Bh3+ Kf3 Bg2+ Kg4 
 16	+0.24 	2.25M  	0:00.09	Bf1 Qg7 Bh3+ Kf3 Bg2+ Kf2 Ne4+ Ke3 d5 Qe7 Ng5 Kd4 Nh3 a5 bxa5 Kxc5 Nf4 Kd6 a6 c5 dxc6 Qa7 Nd5 
 15	+0.33 	1.78M  	0:00.07	Bf1 Qg7 Bh3+ Kf3 Bg2+ Kf2 Ne4+ Ke3 d5 Qe7 Ng5 Kd4 Nh3 a5 bxa5 Kxc5 a6 Kb6 Nf4 Kxa6 Bf3 Kb6 Bxh5 Kc5 Bf3 Qg7 
 14	+0.43 	1.38M  	0:00.06	Bf1 Qf6 Bh3+ Kf3 Bg2+ Kg4 Ne4 Qf8 d5 Kf5 Ng5 Ke5 Nh3 Kf6 Nf4 Qb8 Nxh5+ Ke7 Nf4 
 13	+0.43 	1.10M  	0:00.05	Bf1 Qg7 Bh3+ Kf3 Bg2+ Kf2 Ne4+ Ke3 d5 Qe7 Ng5 Kd4 Nh3 a5 bxa5 Qxc5 Nf4 
 12	  0.00 	392996	0:00.02	d5 Qf6 Be2+ Kf5 Bxh5 Qxc3 e7 Qe1 e8=Q Qf2+ Kh3 Qf1+ Kh2 Qf2+ 
 11	  0.00 	260271	0:00.01	d5 a5 Nb5 Qf6 Be2+ Kf5 Nxc7 axb4 Bxh5 Qe5 Na6 Ke4 Nxb4 
 10	  0.00 	133846	0:00.01	d5 a5 Ne2 Qf8 d6 cxd6 cxd6 Qf2+ Kh1 Qf1+ Kh2 Qf2+ 
  9	  0.00 	69662  	0:00.01	d5 a5 bxa5 Qxc5 Be2+ Kf5 Bxh5 Qf2+ Kh3 Qf1+ Kh2 Qf2+ 
  8	+0.56 	25733  	0:00.00	d5 a5 bxa5 Qxc5 Be2+ Kf5 a6 Ke5 a7 Qxa7 e7 Qf2+ Kh3 
  7	+0.56 	18288  	0:00.00	d5 a5 bxa5 Qxc5 Be2+ Kf5 a6 Ke5 a7 Qxa7 
  6	+0.56 	16316  	0:00.00	d5 a5 bxa5 Qxc5 Be2+ Kf5 a6 Ke5 
  5	+0.44 	10398  	0:00.00	d5 a5 Be2+ Kf5 bxa5 Qxc5 
  4	+0.42 	7831    	0:00.00	d5 a5 Be2+ Kf5 bxa5 
  3	+0.42 	6237    	0:00.00	d5 a5 Be2+ Kf5 
  2	+1.10 	5005    	0:00.00	d5 a5 Be2+ Kf5 bxa5 Qxc5 Bxh5 
  1	+0.45 	151      	0:00.00	d5 
  0	# 
a third run did not find the move after 7 1/2 minutes , go figure..

peter
Posts: 1786
Joined: Sat Feb 16, 2008 6:38 am
Full name: Peter Martan

Re: Bugaboo position for SF

Post by peter » Sat Mar 31, 2018 8:45 am

Hi Michael!
MikeB wrote: ...it does appear a little bit of luck can creep in..

...

a third run did not find the move after 7 1/2 minutes ,
SMP- luck for sure makes big differences here.

Had 3 tries, here's the longest time to solution:

Code: Select all


8/2p1q3/p3P3/2P4p/1PBP2kP/2N3P1/7K/8 w - - 0 1

Analysis by McBrain 9 64 POPCNT:
...
1.Bf1 c6 2.d5 Kf3 3.dxc6 Qxe6 4.Bg2+ Kf2 5.Ne4+ Ke1 6.Ng5 Qg4 7.Bh3 Qe2+ 8.Bg2 Qg4 
  =  (0.00)   Depth: 49/17   00:06:05  10950MN
1.Be2+ 
  =  (0.07 ++)   Depth: 50/60   00:07:27  13395MN
1.Be2+ 
  =  (0.15 ++)   Depth: 50/62   00:07:28  13420MN
...
1.Be2+ 
  +/-  (1.57 ++)   Depth: 50/70   00:07:47  13999MN
...
1.Be2+ 
  +-  (6.22 ++)   Depth: 50/73   00:10:17  18536MN
...
1.Be2+ 
  +-  (10.05 ++)   Depth: 50/106   00:14:17  26254MN
...
1.Be2+ 
  +-  (23.55 ++)   Depth: 50/106   00:45:13  118758MN
1.Be2+ 
  +-  (23.62 ++)   Depth: 50/106   00:45:15  118857MN
1.Be2+ 
...
1.Be2+ 
  +-  (43.50 ++)   Depth: 50/106   01:12:10  206401MN
Second worst was 3'9" in depth 45, best one 1'35" depth 43.

24 threads of 12x3GHz Intel CPU, 32G hash, no tbs.
Peter.

Dann Corbit
Posts: 10207
Joined: Wed Mar 08, 2006 7:57 pm
Location: Redmond, WA USA
Contact:

Re: Bugaboo position for SF

Post by Dann Corbit » Sat Mar 31, 2018 9:09 am

These are the things that make projects like McBrain important.
SF is *purely* Elo driven. If it costs 1 Elo to check for 2 level x-ray, then the check will not be made. But Analysts are patient. And we buy big, fast machines. SO 128 cores and an hour to look at a position means that when we want the right answer to a tough nut to crack, that someone can find the answer.

I am a horrible mercinary. I don't care if it is Houdini or Komodo or McBrain or SF or SF_Mate_finder or whatever. I just want the right result. Now, most people are not interested in that. There are a million computers buzzing away at blitz to gain ratings and nobody will ever even bother to look at the games.

I am the opposite of that. Give me time, give me a clever program, and I will turn electricity into information. (P.S. My electric company keeps sending me memos telling me that my electric bill is going through the roof and they can help me to save money). But damn the torpedoes and full speed ahead.

I thank you for McBrain. One more tool that can turn electricity into answers, much to the chagrin of the electric company. But they do have a reprieve. I cannot afford multiple tons of air conditioning to run full tilt during the summer.
Taking ideas is not a vice, it is a virtue. We have another word for this. It is called learning.
But sharing ideas is an even greater virtue. We have another word for this. It is called teaching.

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