how many moves does it take to gain a pawn when queen up?

[duncan]

after 19 moves stockfish has not gained a pawn, how many moves do you think it should take ?



[pgn]


[FEN "rnb1kbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"]

e2-e4 e7-e6 d2-d4 d7-d6 c2-c4 g7-g6 Nb1-c3 Bf8-g7 Bf1-e2 Ng8-e7 Ng1-f3 a7-a6 O-O Nb8-d7 Bc1-e3 O-O a2-a3 b7-b6 Qd1-d2 Bc8-b7 Be3-h6 f7-f6 b2-b4 a6-a5 d4-d5 e6-e5 Rf1-d1 Rf8-d8 Ra1-c1 Bg7xh6 Qd2xh6 Kg8-h8 Nc3-b5 a5xb4 a3xb4 Ra8-a2 Be2-d3 Ne7-g8
[/pgn]


Stockfish 7 32bit:
1/1 00:00 21 21,000 +10.82 e2-e4
2/2 00:00 60 30,000 +10.87 e2-e4 b7-b6
3/3 00:00 113 56,500 +10.71 e2-e4 d7-d6 d2-d3
4/4 00:00 268 134,000 +11.13 d2-d4 b7-b6 e2-e4 e7-e6
5/5 00:00 759 253,000 +10.82 e2-e4 e7-e5 d2-d4 Nb8-c6 c2-c3 e5xd4
6/6 00:00 1,979 494,750 +10.65 Nb1-c3 d7-d6 d2-d4 e7-e5 e2-e4 Ng8-f6
7/7 00:00 3,561 593,500 +10.53 Nb1-c3 d7-d6 d2-d4 Ng8-f6 e2-e4 e7-e5 f2-f3
8/9 00:00 5,764 640,444 +10.68 Nb1-c3 Ng8-f6 e2-e4 e7-e5 d2-d4 d7-d6 d4-d5 c7-c6
9/9 00:00 10,890 726,000 +10.94 d2-d4 Ng8-f6 Nb1-c3 d7-d6 Bc1-f4 Bc8-f5 e2-e3 Nb8-c6 Ng1-f3
10/13 00:00 17,987 620,241 +10.90 d2-d4 Ng8-f6 Nb1-c3 d7-d6 e2-e4 e7-e5 Ng1-f3 e5xd4 Nf3xd4 Nb8-c6
11/15 00:00 64,519 750,220 +11.02 Nb1-c3 Ng8-f6 e2-e4 e7-e6 Ng1-f3 Bf8-e7 e4-e5 Nf6-d5 Nc3xd5 e6xd5 d2-d4 O-O
12/16 00:00 193,180 465,493 +10.97 Nb1-c3 e7-e6 e2-e4 c7-c6 d2-d4 d7-d5 e4xd5 e6xd5 Ng1-f3 Bf8-b4 a2-a3 Bb4xc3+ b2xc3 Ng8-f6 Qd1-e2+ Nf6-e4
13/17 00:00 286,456 536,434 +11.01 e2-e4 e7-e5 Nb1-c3 Ng8-f6 f2-f4 d7-d6 Ng1-f3 Bc8-g4 d2-d4 Nb8-d7 Bf1-c4 Nd7-b6 Bc4-b5+ c7-c6 d4xe5 d6xe5 f4xe5
14/21 00:01 425,743 483,249 +11.04 e2-e4 e7-e5 Nb1-c3 Ng8-f6 d2-d4 e5xd4 Nc3-b5 Bf8-b4+ Bc1-d2 Bb4xd2+ Qd1xd2 Nb8-a6 e4-e5 Nf6-e4 Qd2xd4 Ne4-g5 Qd4-e3 Ng5-e6 Nb5xa7 O-O Ng1-f3
15/25 00:01 770,679 477,200 +10.97 e2-e4 d7-d6 Nb1-c3 c7-c6 d2-d4 e7-e5 Ng1-f3 Nb8-d7 Bf1-e2 Ng8-f6 O-O Bf8-e7 a2-a4 O-O Bc1-e3 e5xd4 Qd1xd4 Rf8-e8
16/25 00:02 971,885 485,214 +10.92 e2-e4 d7-d6 Nb1-c3 Ng8-f6 Ng1-f3 e7-e5 d2-d4 Bc8-g4 Nc3-b5 Nb8-a6 Qd1-d3 Nf6-d7 h2-h3 Bg4xf3 g2xf3 c7-c6 Nb5-c3 e5xd4
17/26- 00:03 1,516,059 479,007 +10.99 Nb1-c3 Ng8-f6
17/26 00:03 1,657,736 494,846 +10.96 Nb1-c3 Ng8-f6 e2-e4 e7-e5 Ng1-f3 d7-d6 d2-d4 Bc8-g4 Bf1-e2 Nb8-d7 d4xe5 Bg4xf3 Be2xf3 Nd7xe5 Nc3-b5 O-O-O O-O
18/26 00:06 2,900,104 466,930 +11.00 Nb1-c3 Ng8-f6 e2-e4 e7-e5 Ng1-f3 d7-d6 d2-d4 Bc8-g4 d4xe5 d6xe5 Nc3-d5 Bf8-d6 Nd5xf6+ g7xf6 Bc1-h6 Nb8-c6 Bh6-g7 O-O-O Bg7xh8 Bd6-b4+ c2-c3 Rd8xd1+ Ra1xd1
19/27 00:11 5,189,663 468,634 +11.01 e2-e4 d7-d6 d2-d4 e7-e6 Nb1-c3 Ng8-f6 Ng1-f3 Bf8-e7 Bf1-b5+ Bc8-d7 O-O Nb8-c6 d4-d5 e6xd5 e4xd5 Nc6-e5 Bb5xd7+ Nf6xd7 Nc3-b5 O-O Nf3xe5 Nd7xe5 Nb5xc7
20/27- 00:12 5,980,677 467,276 +10.94 e2-e4 d7-d6
20/27+ 00:14 6,618,526 464,002 +11.01 e2-e4
20/27- 00:16 7,589,557 464,590 +10.94 e2-e4 e7-e5
20/27 00:21 9,849,748 466,525 +10.88 e2-e4 e7-e5 Ng1-f3 d7-d6 Bf1-c4 Bf8-e7 d2-d4 e5xd4 Nf3xd4 Ng8-f6 Nb1-c3 O-O O-O Bc8-d7 Nd4-f5 Bd7xf5 e4xf5 Nb8-d7 Bc1-f4 Nd7-e5 Bc4-b3
21/28+ 00:24 11,443,198 466,175 +10.95 e2-e4
21/28+ 00:27 12,672,698 464,865 +11.02 e2-e4
21/28- 00:30 14,230,861 465,243 +10.95 e2-e4 d7-d6
21/29+ 00:34 16,069,436 465,039 +11.04 e2-e4
21/29 00:35 16,681,565 465,913 +11.04 e2-e4 d7-d6 Nb1-c3 Ng8-f6 d2-d4 e7-e6 Ng1-f3 Bf8-e7 Bf1-d3 Bc8-d7 O-O Nb8-c6 a2-a3 O-O Rf1-e1 a7-a6 Bc1-f4 Nf6-h5 Bf4-d2 Nh5-f6 e4-e5 d6xe5 d4xe5 Nf6-d5
22/29- 00:37 17,350,688 465,827 +10.97 e2-e4 d7-d6
22/29+ 00:39 18,275,430 464,586 +11.04 e2-e4
22/29 00:43 20,265,164 466,165 +11.00 e2-e4 d7-d6 Nb1-c3 Ng8-f6 d2-d4 e7-e6 Bf1-d3 Bf8-e7 Ng1-f3 O-O O-O Nb8-c6 a2-a3 a7-a6 Rf1-e1 e6-e5 d4-d5 Nc6-b8 Bc1-e3 Nb8-d7 h2-h3 h7-h6 Kg1-h1 Nd7-c5
23/29 00:48 22,493,437 463,906 +11.00 e2-e4 d7-d6 Nb1-c3 Ng8-f6 d2-d4 e7-e6 Bf1-d3 Bf8-e7 Ng1-f3 O-O O-O Nb8-c6 a2-a3 a7-a6 Rf1-e1 e6-e5 d4-d5 Nc6-b8 Bc1-e3 Nb8-d7 h2-h3 h7-h6 Kg1-h1
24/29+ 01:06 30,670,284 460,065 +11.07 e2-e4
24/29- 01:10 32,300,698 459,894 +11.00 e2-e4 d7-d6
24/32+ 01:18 35,921,745 460,027 +11.07 e2-e4
24/32- 01:20 37,038,424 460,453 +10.98 e2-e4 d7-d6
24/32 01:25 39,138,180 458,996 +11.03 e2-e4 d7-d6 d2-d4 e7-e6 c2-c4 Ng8-f6 Nb1-c3 e6-e5 Nc3-d5 Nf6xd5 c4xd5 Bf8-e7 d4xe5 d6xe5 Ng1-f3 Nb8-d7 Bf1-d3 c7-c6 Bd3-c2 c6xd5 Qd1xd5 O-O O-O Nd7-f6 Qd5xe5 Bc8-e6
25/32- 01:35 43,535,498 457,502 +10.96 e2-e4 d7-d6
25/32+ 01:45 48,161,301 456,392 +11.03 e2-e4
25/32 01:53 51,968,848 457,126 +11.06 e2-e4 d7-d6 d2-d4 e7-e6 c2-c4 Ng8-f6 Nb1-c3 e6-e5 Ng1-f3 e5xd4 Nf3xd4 Bf8-e7 Bf1-e2 O-O O-O Bc8-d7 Bc1-e3 a7-a6 Nc3-d5 Be7-d8 f2-f3 Nb8-c6 Nd4xc6 Nf6xd5 c4xd5 b7xc6
26/32- 02:06 57,415,642 456,016 +10.99 e2-e4 d7-d6
26/32 02:17 62,565,454 455,385 +10.99 e2-e4 d7-d6 d2-d4 e7-e6 c2-c4 Ng8-f6 Nb1-c3 e6-e5 Ng1-f3 e5xd4 Nf3xd4 Bf8-e7 Bf1-e2 O-O O-O Bc8-d7 Bc1-e3 a7-a6 Nc3-d5 Be7-d8 f2-f3 Nb8-c6 Nd4xc6 b7xc6 Nd5-c3 Ra8-b8 b2-b3 Bd8-e7 Qd1-e1 c6-c5 Be2-d3 Rf8-e8
27/36+ 02:33 69,308,693 453,724 +11.06 e2-e4
27/36- 02:46 75,079,335 450,832 +10.99 e2-e4 d7-d6
27/36+ 02:52 77,520,667 450,780 +11.06 e2-e4
27/36 03:06 83,724,145 450,183 +11.06 e2-e4 d7-d6 d2-d4 e7-e6 c2-c4 Ng8-f6 Nb1-c3 e6-e5 Ng1-f3 e5xd4 Nf3xd4 Bf8-e7 Bf1-e2 O-O O-O a7-a6 Bc1-e3 Rf8-e8 f2-f4 c7-c5 Nd4-b3 Nb8-c6 Be2-f3 Bc8-d7 Nc3-d5 Nf6xd5 c4xd5
28/36- 03:33 95,941,100 450,874 +10.99 e2-e4 d7-d6
28/36+ 04:17 115,620,293 449,316 +11.06 e2-e4
28/36- 04:29 120,939,453 449,398 +10.99 e2-e4 d7-d6
28/36 04:47 129,123,467 449,253 +11.01 e2-e4 d7-d6 d2-d4 e7-e6 c2-c4 Ng8-f6 Nb1-c3 e6-e5 Ng1-f3 e5xd4 Nf3xd4 Bf8-e7 Bf1-e2 O-O O-O a7-a6 Bc1-e3 Rf8-e8 f2-f4 c7-c5 Nd4-b3 Nb8-c6 Be2-f3 Bc8-e6 Nc3-d5 Be7-d8 Rf1-e1 Ra8-c8 Kg1-h1 Nf6-d7 Qd1-e2
29/37 05:40 152,011,431 447,608 +11.05 e2-e4 d7-d6 d2-d4 e7-e6 c2-c4 Ng8-f6 Nb1-c3 e6-e5 Ng1-f3 e5xd4 Nf3xd4 Bf8-e7 Bf1-e2 O-O O-O a7-a6 f2-f4 c7-c5 Nd4-b3 Nb8-c6 Be2-f3 a6-a5 Bc1-e3 Bc8-e6 Nb3-d2 Ra8-c8 Qd1-b3 Rc8-b8 Ra1-e1 Nf6-g4 Bf3xg4 Be6xg4 Nc3-d5 Rf8-e8
30/37 06:52 185,449,440 449,890 +11.02 e2-e4 d7-d6 d2-d4 e7-e6 c2-c4 Ng8-f6 Nb1-c3 e6-e5 Ng1-f3 e5xd4 Nf3xd4 Bf8-e7 Bf1-e2 O-O O-O a7-a6 f2-f4 c7-c5 Nd4-b3 Nb8-c6 Be2-f3 a6-a5 Bc1-e3 Bc8-e6 Nb3-d2 Be6-d7 Nc3-b5 b7-b6 b2-b3 Rf8-c8 h2-h3 Rc8-d8 Nb5-c7 Ra8-b8 Nc7-d5
31/42- 14:33 393,732,415 451,428 +10.95 e2-e4 e7-e6
31/42 19:13 521,750,028 453,102 +10.93 e2-e4 e7-e6 d2-d4 Bf8-e7 Ng1-f3 d7-d6 Nb1-c3 Ng8-f6 Bf1-b5+ Nf6-d7 Bc1-e3 O-O O-O a7-a6 Bb5-e2 Nd7-f6 Be3-f4 Nf6-d7 d4-d5 Be7-f6 Qd1-d2 Rf8-e8 Bf4-e3 e6xd5 Nc3xd5 Bf6-d8 Be3-g5 f7-f6 Bg5-e3 Nb8-c6 Be2-d3 b7-b5 a2-a4 b5xa4 Ra1xa4 Nd7-c5
32/42+ 21:22 581,257,670 453,926 +11.00 e2-e4
32/44+ 24:15 660,810,292 454,609 +11.06 e2-e4
32/44 38:52 1,063,110,878 456,759 +11.15 e2-e4 e7-e6 d2-d4 Bf8-e7 Nb1-c3 a7-a6 Bf1-d3 d7-d6 f2-f4 Nb8-c6 Ng1-f3 Nc6-b4 Bd3-c4 Ng8-f6 a2-a3 d6-d5 e4-e5 Nf6-d7 Bc4-b3 Nb4-c6 O-O Nd7-b6 f4-f5 Nc6-a5 Bc1-g5 f7-f6 e5xf6 g7xf6 Bg5-f4 c7-c6 Qd1-e2 Na5xb3 c2xb3 e6xf5
33/46- 40:39 1,114,127,989 457,387 +11.08 e2-e4 e7-e6
33/46- 46:01 1,263,480,572 458,149 +11.01 e2-e4 e7-e6
33/46+ 49:19 1,358,064,759 459,547 +11.08 e2-e4
33/46 51:44 1,428,113,042 460,780 +11.06 e2-e4 e7-e6 d2-d4 d7-d5 e4xd5 e6xd5 Ng1-f3 Nb8-c6 Bc1-f4 Bf8-d6 Bf4xd6 c7xd6 Bf1-d3 Ng8-f6 O-O Bc8-e6 Rf1-e1 O-O Nb1-a3 Rf8-e8 h2-h3 Re8-e7 c2-c3 Ra8-e8 Na3-c2 h7-h6 Nf3-d2 Nc6-a5 Nc2-e3 Re8-c8 Qd1-a4 Na5-c6 Qa4-b3 Rc8-e8 Qb3-d1 Nf6-d7 a2-a4
34/46 56:36 1,565,923,128 461,711 +11.04 e2-e4 e7-e6 d2-d4 d7-d5 e4xd5 e6xd5 Ng1-f3 Nb8-c6 Bc1-f4 Bf8-d6 Bf4xd6 c7xd6 Bf1-d3 Ng8-f6 O-O Bc8-e6 Rf1-e1 O-O Nb1-a3 Rf8-e8 h2-h3 Re8-e7 c2-c3 Ra8-e8 Na3-c2 h7-h6 Nc2-e3 Nf6-h5 Nf3-d2 Nh5-f4 Bd3-c2 g7-g5 a2-a4 f7-f6 a4-a5 a7-a6 b2-b4 Be6-f7 Qd1-f3
35/46 1:06:29 1,839,906,082 461,949 +11.04 e2-e4 e7-e6 d2-d4 d7-d5 e4xd5 e6xd5 Ng1-f3 Nb8-c6 Bc1-f4 Bf8-d6 Bf4xd6 c7xd6 Bf1-d3 Ng8-f6 O-O Bc8-e6 Rf1-e1 O-O Nb1-a3 Rf8-e8 h2-h3 Ra8-c8 c2-c3 h7-h6 Na3-c2 Nf6-h5 Qd1-d2 Nc6-a5 Bd3-b5 Na5-c6 a2-a3 a7-a6 Bb5-d3 Nh5-f6 Qd2-f4 Re8-d8 Nc2-e3
36/46+ 1:16:13 2,100,395,986 460,029 +11.11 e2-e4
36/46 1:24:46 2,313,699,719 455,565 +11.10 e2-e4 e7-e6 d2-d4 d7-d5 e4xd5 e6xd5 Ng1-f3 Nb8-c6 Bc1-f4 Bf8-d6 Bf4xd6 c7xd6 Bf1-d3 Ng8-f6 O-O Bc8-e6 Rf1-e1 O-O Nb1-a3 Rf8-e8 c2-c3 h7-h6 Qd1-b3 Re8-e7 Na3-c2 Ra8-d8 Nc2-e3 Re7-c7 Ra1-c1 Nc6-a5 Qb3-a4 Na5-c6 h2-h3 Rd8-e8 Qa4-a3 Re8-d8 Nf3-d2 Rc7-e7 Qa3-b3 Re7-c7 Bd3-b5
37/51+ 2:45:51 4,500,429,925 452,982 +11.17 e2-e4
37/51+ 4:57:24 8,046,889,718 451,739 +11.24 e2-e4
37/51 5:22:56 8,810,580,831 454,063 +11.24 e2-e4 e7-e6 d2-d4 b7-b6 Bf1-d3 Bc8-b7 Ng1-f3 a7-a6 O-O d7-d6 c2-c4 Ng8-f6 Nb1-c3 Bf8-e7 a2-a3 O-O Rf1-e1 Nf6-d7 Bc1-e3 Nb8-c6 Bd3-c2 Be7-f6 Qd1-d3 e6-e5 d4-d5 Nc6-e7 b2-b4 Ne7-g6 Bc2-a4 Rf8-d8 g2-g3 Bf6-e7 Be3-d2 Nd7-f6 Ba4-b3 a6-a5 Nc3-b5 Rd8-c8 h2-h4 a5xb4 a3xb4 Ra8xa1 Re1xa1
38/51- 5:43:30 9,419,819,697 456,483 +11.17 e2-e4 e7-e6
38/51+ 6:00:50 9,942,211,621 458,734 +11.24 e2-e4
38/51- 7:25:24 12,467,719,552 466,285 +11.17 e2-e4 e7-e6
38/51 7:32:22 12,679,244,504 466,911 +11.19 e2-e4 e7-e6 d2-d4 d7-d6 c2-c4 g7-g6 Nb1-c3 Bf8-g7 Bf1-e2 Ng8-e7 Ng1-f3 a7-a6 O-O Nb8-d7 Bc1-e3 O-O a2-a3 b7-b6 Qd1-d2 Bc8-b7 Be3-h6 f7-f6 b2-b4 a6-a5 d4-d5 e6-e5 Rf1-d1 Rf8-d8 Ra1-c1 Bg7xh6 Qd2xh6 Kg8-h8 Nc3-b5 a5xb4 a3xb4 Ra8-a2 Be2-d3 Ne7-g8

[Vinvin]

Sometimes it's better to not get material but it's stronger to rise the threats !

[duncan]

Sometimes it's better to not get material but it's stronger to rise the threats !

as an expert chess player, if your goal was to grab a pawn as soon as possible , how long do you think it would take you in such a position ?

[Vinvin]

Sometimes it's better to not get material but it's stronger to rise the threats !

as an expert chess player, if your goal was to grab a pawn as soon as possible , how long do you think it would take you in such a position ?

Worth to try with a very materialistic engine as Fritz 3 or Fritz 5.

I tried Ruffian 1.0.5, no material gain after 6 minutes.

Code: Select all

FEN: rnb1kbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1

Ruffian 1.0.5:
 1/1	00:00	 2	0	+9,52	1.a3
 1/1	00:00	 3	0	+9,53	1.a4
 1/1	00:00	 6	0	+9,56	1.c3
 1/1	00:00	 7	0	+9,57	1.c4
 1/1	00:00	 8	0	+9,67	1.d3
 1/1	00:00	 9	0	+9,73	1.d4
 2/3	00:00	 52	0	+9,52	1.d4 d5
 3/4	00:00	 596	0	+9,72	1.d4 d5 2.Nc3
 3/5	00:00	 819	0	+9,73	1.e4 Nf6 2.Nc3
 4/5	00:00	 1k	0	+9,52	1.e4 Nf6 2.Nc3 e5
 4/7	00:00	 2k	0	+9,56	1.d4 Nf6 2.Bf4 d6
 5/8	00:00	 4k	0	+9,73	1.d4 Nf6 2.Bf4 Nd5 3.Be5
 6/11	00:00	 10k	0	+9,62	1.d4 Nf6 2.Nc3 d6 3.e4 Nc6
 7/13	00:00	 38k	1.880k	+9,80	1.d4 Nc6 2.Nc3 e5 3.dxe5 Nxe5 4.Qd5 d6
 8/14	00:00	 70k	1.739k	+9,65	1.d4 Nc6 2.Nc3 Nf6 3.e4 d6 4.Nf3 Be6
 9/17	00:00	 271k	2.083k	+9,78	1.d4 Nf6 2.Nc3 e6 3.Nf3 Bd6 4.Nb5 0-0 5.Nxd6 cxd6
 10/19	00:00	 681k	2.269k	+9,75	1.d4 Nf6 2.Nc3 d5 3.Bf4 c6 4.e3 Be6 5.Nf3 Nbd7
 10/22	00:00	 1.708k	2.308k	+9,79	1.e4 Nf6 2.Nc3 Nc6 3.d4 d6 4.Nf3 Bg4 5.Bc4 e5
 11/22	00:01	 3.785k	2.442k	+9,82	1.e4 e6 2.Nf3 Nf6 3.e5 Nd5 4.c4 Nb6 5.Nc3 d5 6.cxd5
 12/23	00:03	 7.322k	2.393k	+9,78	1.e4 e6 2.Nc3 Nf6 3.e5 Nd5 4.Nxd5 exd5 5.Qf3 c6 6.c4 d4 7.Bd3
 13/25	00:10	 23.556k	2.300k	+9,83	1.e4 Nf6 2.e5 Nd5 3.c4 Nb4 4.a3 N4c6 5.d4 d6 6.Nf3 dxe5 7.Nxe5 Bf5
 14/26	00:20	 47.820k	2.346k	+9,86	1.e4 Nf6 2.Nc3 e6 3.e5 Nd5 4.Nxd5 exd5 5.Qf3 c6 6.c4 d4 7.Qg4 c5 8.Nf3
 15/28	00:44	 103.453k	2.351k	+9,86	1.e4 Nf6 2.Nc3 e6 3.Nf3 Be7 4.e5 Nd5 5.Nxd5 exd5 6.c4 dxc4 7.Bxc4 0-0 8.0-0 Nc6
 16/30	02:07	 302.118k	2.374k	+9,92	1.e4 Nf6 2.Nc3 e6 3.Nf3 Be7 4.e5 Nd5 5.Nxd5 exd5 6.c4 dxc4 7.Bxc4 d6 8.0-0 dxe5 9.Re1
 17/35	05:43	 795.111k	2.315k	+9,94	1.e4 Nf6 2.Nc3 e6 3.Nf3 d6 4.d4 Be7 5.Bd3 0-0 6.0-0 Nc6 7.Nb5 Ne8 8.Bf4 Bd7 9.c4

[Vinvin]

after 19 moves stockfish has not gained a pawn, how many moves do you think it should take ?

After some thinking, I'd say it's difficult to win material as long as everything (every pieces) is defended. As the position is very compact, it's very hard to create weakness after 20 moves. But let's play an engine vs another one and we will see score rise soon, hard and mate very close too.

[Uri Blass]

I think the right way to test it is by playing stockfish against stockfish.

PV is not reliable

[Vinvin]

I think the right way to test it is by playing stockfish against stockfish.

PV is not reliable

I always prefer 2 different engines (2 games, switched colour).
A lone engine tends to confirm its own thinking.

[Laskos]

With a tweaked IvanHoe in order to make it more materialistic:

[pgn][White "IvanHoe 46"]
[Black "Houdini 4"]
[Result "1-0"]
[SetUp "1"]
[FEN "rnb1kbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 0"]

1. Nc3 e6 2. Nf3 a6 3. d4 d6 4. e4 h6 5. Bd3 Nd7 6. O-O c5 7. dxc5 Nxc5 8. Be2 Nf6 9. e5 dxe5 10. Nxe5 Ncd7 11. Nc4 Be7 12. Nd6+ Kf8 13. Bf3 a5 14. Nxc8 Rxc8 15. Bxb7 Rb8 16. Bc6 Nc5 17. Be3 Kg8 18. Qe2 Kh7 19. Nb5 Rhc8 20. Bf3 Rb6 21. c4 Nfd7 22. Rfd1 Ne5 23. Bd2 Nxf3+ 24. Qxf3 f5 25. Bxa5 Rbb8 26. Nd4 g6 27. Nc6 Rb7 28. Nxe7 Rxe7 29. Rd8 Rxd8 30. Bxd8 Rg7 31. Qc6 Nd7 32. Rd1 Ne5 33. Qxe6 Ng4 34. f3 Ne5 35. Qxe5 Rf7 36. Qe8 Kg7 37. Rd7 Rxd7 38. Qxd7+ Kg8 39. Bf6 Kf8 40. Qe7+ Kg8 41. Qg7+ 1-0[/pgn]

The first grabbed pawn move 15. Bxb7

[pgn][White "IvanHoe 46"]
[Black "Houdini 4"]
[Result "1-0"]
[SetUp "1"]
[FEN "rnb1kbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 0"]

1. Nc3 e6 2. Nf3 a6 3. d4 d6 4. e4 Nd7 5. e5 d5 6. Be3 h6 7. Bd3 b6 8. Ne2 c5 9. c3 Ne7 10. O-O Bb7 11. Rc1 c4 12. Bc2 b5 13. Nf4 g6 14. a4 Bg7 15. axb5 axb5 16. Ra1 Rc8 17. Ra5 O-O 18. Rxb5 Bc6 19. Ra5 Rb8 20. Qc1 Rfe8 21. Ba4 Rb6 22. Bxc6 Nxc6 23. Ra2 Reb8 24. Qa1 Rc8 25. Ra8 Ncb8 26. Qa2 Rb5 27. Rb1 Nb6 28. Ra5 Rxa5 29. Qxa5 N8d7 30. Qb5 Ra8 31. b3 cxb3 32. Qxb3 Bf8 33. Qb5 Rb8 34. Nd2 Ra8 35. c4 dxc4 36. d5 exd5 37. Bxb6 Nxb6 38. Qxb6 g5 39. Nxd5 c3 40. Qb7 Rd8 41. e6 cxd2 42. Qxf7+ Kh8 43. Qf6+ Bg7 44. Qxd8+ Kh7 45. e7 h5 46. e8=Q d1=R+ 47. Rxd1 h4 48. Qh5+ Bh6 49. Qdxg5 Kh8 50. Qhxh6+ 1-0[/pgn]

The first grabbed pawn move 18. Rxb5

[Laskos]

Tweaking further IvanHoe in order to value a bit more the pawns

[pgn][White "IvanHoe 46"]
[Black "Houdini 4"]
[Result "1-0"]
[SetUp "1"]
[FEN "rnb1kbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 0"]

1. Nf3 Nf6 2. Nc3 d5 3. d3 c6 4. e4 g6 5. exd5 Nxd5 6. Nxd5 cxd5 7. d4 Nd7 8. Ne5 a6 9. c4 Bg7 10. Nxd7 Bxd7 11. Qb3 O-O 12. Qxb7 Bf5 13. Qxd5 Rad8 14. Qa5 Bxd4 15. Qxa6 Rb8 16. Qa3 e6 17. Be2 Rfd8 18. O-O e5 19. Rd1 Re8 20. Bf3 Bc2 21. Rd2 Bf5 22. Bd5 Rbc8 23. Qg3 Be6 24. Bxe6 Rxe6 25. Rc2 Rb6 26. a4 Rcb8 27. a5 Rb3 28. Qg4 Rd8 29. a6 h5 30. Qe2 Rbb8 31. Be3 Ra8 32. c5 h4 33. c6 Bxe3 34. fxe3 Kf8 35. c7 Rdc8 36. Qg4 h3 37. Qxc8+ Rxc8 38. a7 Ke7 39. a8=Q Rxa8 40. Rxa8 1-0[/pgn]
12. Qxb7 and 13. Qxd5 grabs two pawns consecutively

[pgn][White "IvanHoe 46"]
[Black "Houdini 4"]
[Result "1-0"]
[SetUp "1"]
[FEN "rnb1kbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 0"]

1. Nf3 Nf6 2. Nc3 d5 3. d3 c6 4. e4 g6 5. exd5 Nxd5 6. Nxd5 cxd5 7. d4 Bg7 8. Bb5+ Nc6 9. c4 a6 10. Qa4 O-O 11. Bxc6 bxc6 12. Qxc6 Bf5 13. c5 Be4 14. Ng5 Bf5 15. Qb7 Rab8 16. Qxd5 Rbd8 17. Qb7 Bc8 18. Qb3 Bxd4 19. Be3 Bg7 20. Rd1 Rde8 21. c6 h6 22. Nf3 Bg4 23. c7 Rc8 24. Qb6 Rfe8 25. Rd8 h5 26. Rxe8+ Rxe8 27. Bd4 Bxd4 28. Nxd4 Kg7 29. Qxa6 Rc8 30. Qc6 Rf8 31. a4 e5 32. Nb5 e4 33. Nd6 e3 34. fxe3 Rg8 35. c8=Q Bxc8 36. Nxc8 Kh7 37. a5 Rg7 38. a6 f5 39. a7 Rxa7 40. Nxa7 Kg7 41. b4 h4 42. b5 f4 43. exf4 Kf7 44. Qd7+ Kf6 45. O-O g5 46. fxg5+ Kg6 47. Qf7+ Kxg5 48. Rf5+ Kg4 49. Qh5+ 1-0[/pgn]
12. Qxc6 grabs a pawn.

[duncan]

With a tweaked IvanHoe in order to make it more materialistic:

thanks so much for taking the time to do this. your tweaked ivanhoe gets the pawn a lot quicker than my untweaked stockfish.


what settings did you change ?