Stockfish 1 with 12 threads and 2 hours vs Stockfish 17.1 with 12 threads and 1 minute, who wins?

[Uri Blass]

After 1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. Nc3 Bb4 5. Qa4+ Nc6 6. e3 O-O
7. Bd2 dxc4 8. Bxc4 Bd6 9. O-O e5 10. d5 Ne7 11. e4 a6 12. Qc2 b5 13. Bb3 Bg4
14. Qd3 Ng6 15. h3 Bd7 16. Ne2 Nh5 17. Rac1 a5 18. g4 Nhf4 19. Nxf4 exf4 20.
Rfe1 Re8 21. Bc3 f6 22. Bd1 Qe7 23. Qc2 b4 24. Bd4 a4 25. Bc5 a3 26. b3 Ne5
27. Nxe5 fxe5 28. Kg2 Ra5 29. Bxd6 cxd6 30. Qd2 Rb5 31. Bf3 Rb7 32. Rh1 Reb8
33. Rc2 Rf8 34. Rhc1 h6 35. Rc4 Kh7 36. Rc7 Rfb8 37. Be2 Kg6 38. R7c2 Qg5 39.
Qd3 Ra7 40. Kf1 Qh4 41. Kg1 Rf8 42. Qf3 Qg5 43. Kf1 Kh7 44. Rc4 Rb7 45. Ke1
Qd8 46. R4c2 Rb8*

It seens to me that the position is not complicated enough to cause old stockfish to make mistakes.

old stockfish suggest Rc7 with draw score.

It will take hours to get 100,000 million node but I believe that even 10,000 millon nodes is enough in this position.

Analysis so far
[d]1r1q1r2/3b2pk/3p3p/3Pp3/1p2PpP1/pP3Q1P/P1R1BP2/2R1K3 w - - 24 47

Stockfish-191-64-ja:
1 00:00 165 83k +0.44 Ke1-f1
2 00:00 218 109k +0.36 Rc2-c7 g7-g6
2 00:00 261 131k +0.40 Ke1-f1 g7-g6
3 00:00 419 140k +0.44 Ke1-f1 g7-g6 Kf1-g1
4 00:00 652 217k +0.40 Ke1-f1 g7-g6 Kf1-g1 Kh7-g7
5 00:00 1k 297k +0.36 Ke1-f1 g7-g6 Kf1-g1 Kh7-g7 Rc2-c7
6+ 00:00 2k 425k +0.44 Ke1-f1 g7-g6 Kf1-g1 Kh7-g7 Rc2-c7
6+ 00:00 2k 459k +0.52 Ke1-f1 g7-g6 Kf1-g1 Kh7-g7 Rc2-c7
6 00:00 4k 468k +0.48 Ke1-f1 Qd8-a5 Kf1-g1 Rf8-c8 Rc2xc8 Rb8xc8 Rc1xc8 Bd7xc8
7- 00:00 7k 552k +0.32 Ke1-f1 Qd8-b6 Kf1-g1 Rb8-c8
7 00:00 12k 616k +0.40 Be2-d3 Qd8-b6 Rc2-c7 Rb8-c8 Rc7xc8 Rf8xc8 Rc1xc8 Bd7xc8 Ke1-d2
8 00:00 14k 570k +0.28 Be2-d3 Qd8-b6 Rc2-c7 Rb8-c8 Rc7xc8 Rf8xc8 Rc1xc8 Bd7xc8 Ke1-d2 Qb6-d4
9- 00:00 22k 643k +0.12 Be2-d3 Qd8-b6 Rc2-c7 Rb8-c8 Rc7xc8 Rf8xc8 Rc1xc8 Bd7xc8 Ke1-d2 Qb6-d4
9 00:00 29k 696k +0.20 Rc2-c7 Rf8-f7 Qf3-g2 g7-g6 Qg2-f3 Kh7-g7 Be2-d3 Bd7-e8 Rc7xf7+ Be8xf7
9 00:00 33k 749k +0.28 Ke1-f1 Qd8-b6 Kf1-g1 Rb8-c8 Rc2xc8 Rf8xc8 Rc1xc8 Bd7xc8 Qf3-d3 Bc8-d7 Qd3-c4
10 00:00 49k 788k +0.24 Ke1-f1 Qd8-b6 Kf1-g2 Kh7-g8 Rc2-c7 Rb8-c8 Rc7xc8 Rf8xc8 Rc1xc8+ Bd7xc8 Qf3-d3 Kg8-f7
11 00:00 104k 1,129k +0.20 Ke1-f1 Qd8-b6 Kf1-g2 Rb8-c8 Rc2xc8 Rf8xc8 Rc1xc8 Bd7xc8 Qf3-d3 Bc8-d7 Qd3-a6 Qb6xa6 Be2xa6 Kh7-g6 Kg2-f3 Kg6-g5
11 00:00 143k 1,262k +0.24 Qf3-g2 g7-g6 Qg2-f3 Kh7-g7 Rc2-c7 Rf8-f7 Ke1-f1 Bd7-e8 Rc7-c2 Be8-b5 Be2xb5 Rb8xb5 Kf1-g1
12 00:00 171k 1,288k +0.24 Qf3-g2 g7-g6 Qg2-f3 Kh7-g7 Rc2-c7 Rb8-c8 Rc7xc8 Bd7xc8 Qf3-d3 Bc8-d7 Qd3-a6 f4-f3 Qa6xd6 f3xe2 Qd6xe5+ Rf8-f6 Ke1xe2
13- 00:00 260k 1,468k +0.16 Qf3-g2 g7-g6 Qg2-f3 Qd8-b6 Qf3-d3 f4-f3 Be2xf3 Bd7-b5 Rc2-c7+ Kh7-g8
13+ 00:00 316k 1,570k +0.32 Rc2-c7 Rf8-f7 Qf3-g2 g7-g6 f2-f3 Bd7-e8 Rc7-c2 Be8-d7 Ke1-f1 Kh7-g7 Qg2-f2
13 00:00 333k 1,534k +0.24 Rc2-c7 Rf8-f7 Qf3-g2 g7-g6 f2-f3 Bd7-e8 Rc7-c2 Qd8-h4+ Ke1-f1 Kh7-g7 Kf1-g1 Rf7-a7 Rc2-c7+ Ra7xc7 Rc1xc7+ Be8-f7 Be2-d3
14+ 00:00 428k 1,620k +0.32 Rc2-c7 Rf8-f7 Qf3-g2 g7-g6 f2-f3 Bd7-e8 Rc7-c2 Qd8-h4+ Ke1-f1 Kh7-g7 Kf1-g1 Rf7-a7 Rc2-c7+ Ra7xc7 Rc1xc7+ Be8-f7 Qg2-f2 Qh4xh3 Rc7xf7+
14 00:00 445k 1,602k +0.32 Rc2-c7 Rf8-f7 Qf3-g2 g7-g6 f2-f3 Bd7-e8 Rc7-c2 Qd8-h4+ Ke1-f1 Kh7-g7 Kf1-g1 Rf7-d7 Be2-f1 Rd7-f7 Bf1-a6 Rb8-b6 Ba6-e2 Be8-b5 Be2xb5 Rb6xb5 Rc2-c6 Qh4-e7 Qg2-d2
15- 00:00 647k 1,842k +0.24 Rc2-c7 Rf8-f7 Qf3-g2 g7-g6 f2-f3 Rb8-c8 Rc7xc8 Bd7xc8 Qg2-f2 Kh7-g7 Ke1-d2 Rf7-c7 Rc1xc7+ Qd8xc7
15 00:00 935k 2,116k +0.24 Rc2-c7 Rf8-f7 Qf3-g2 g7-g6 f2-f3 Rb8-c8 Rc7xc8 Bd7xc8 Qg2-f2 Bc8-b7 Ke1-d2 Kh7-g7 Be2-d3 Rf7-c7 Rc1xc7+ Qd8xc7 Bd3-c4 Qc7-e7
16+ 00:00 2,355k 3,226k +0.36 Rc2-c7 Rf8-f7 Qf3-g2 g7-g6 f2-f3 Kh7-g7 Qg2-f2 Bd7-b5 Rc7xf7+ Kg7xf7 Qf2-a7+ Bb5-d7 Rc1-c7
16 00:00 2,784k 3,489k +0.20 Rc2-c7 Rf8-f7 Qf3-g2 Qd8-h4 Be2-d3 Kh7-g8 Qg2-f3 Qh4-d8 Rc7-c2 Qd8-b6 Ke1-f1 Rf7-f8 Kf1-g1 Rf8-c8 Rc2xc8+ Rb8xc8 Rc1xc8+ Bd7xc8 Kg1-g2 Bc8-d7
17+ 00:01 5,204k 4,659k +0.28 Rc2-c7 Rf8-f7 Qf3-g2 Qd8-h4 Be2-d3 Kh7-g8 Qg2-f3 Qh4-d8 Rc7-c2 Qd8-b6 Ke1-f1 Rf7-f8 Kf1-g2 Rb8-c8 Rc2xc8 Bd7xc8 Rc1-c6
17 00:01 5,290k 4,686k +0.32 Rc2-c7 Rf8-f7 Qf3-g2 Qd8-h4 Be2-d3 Kh7-g8 Qg2-f3 Qh4-d8 Rc7-c2 Qd8-b6 Ke1-f1 g7-g6 Kf1-g1 Rf7-f8 Qf3-d1 Rb8-c8 Qd1-d2
18 00:01 6,264k 4,952k +0.20 Rc2-c7 Rf8-f7 Qf3-g2 Qd8-h4 Be2-a6 g7-g6 Ke1-f1 f4-f3 Qg2-g3 Qh4-g5 Rc1-c2 Kh7-g7 Kf1-g1 h6-h5 g4xh5 Qg5xg3+ f2xg3 g6xh5 Kg1-f2 Bd7xh3 Rc7xf7+ Kg7xf7 Kf2xf3 Rb8-g8
19 00:01 7,348k 5,267k +0.20 Rc2-c7 Rf8-f7 Qf3-g2 Qd8-h4 Be2-a6 g7-g6 Ke1-f1 f4-f3 Qg2-g3 Qh4-g5 Rc1-c2 Kh7-g7 Kf1-g1 h6-h5 g4xh5 Qg5xg3+ f2xg3 g6xh5 Kg1-f2 Bd7xh3 Rc7xf7+ Kg7xf7 Kf2xf3 Rb8-g8
20- 00:01 13,506k 6,902k +0.12 Rc2-c7 Rf8-f7 Qf3-g2 Rb8-c8 Rc7xc8 Bd7xc8 Qg2-h1 Rf7-c7 Ke1-d2 Rc7xc1 Qh1xc1 Bc8-d7 Qc1-e1 Qd8-b6
20+ 00:02 21,177k 8,067k +0.28 Rc2-c7 Rf8-f7 Qf3-d3 f4-f3 Be2-f1 Bd7-b5 Qd3-c2 Rf7xc7 Qc2xc7 Qd8xc7 Rc1xc7 Bb5xf1 Ke1xf1 Kh7-g6 Kf1-e1
20+ 00:02 21,905k 8,152k +0.36 Rc2-c7 Rf8-f7 Qf3-d3 Bd7-b5 Qd3-c2 Bb5-d7 Be2-f1 g7-g6 f2-f3 Kh7-g7 Qc2-f2 Rb8-c8 Rc7xc8 Bd7xc8 Rc1-c4
20 00:03 34,747k 9,353k +0.40 Rc2-c7 Bd7-e8 Ke1-f1 Kh7-g8 Qf3-g2 Rf8-f7 Rc7-c2 Be8-d7 f2-f3 Qd8-h4 Rc2-c7 g7-g6 Qg2-h2 Kg8-g7 Be2-d3 Rf7-e7 Kf1-g2 Re7-f7 Kg2-g1 Kg7-g8
21 00:04 40,248k 9,677k +0.44 Rc2-c7 Bd7-e8 Ke1-f1 Rf8-f6 Kf1-g2 Be8-d7 Kg2-g1 Rf6-f7 Qf3-g2 Rb8-c8 Rc7xc8 Bd7xc8 Be2-d3 Rf7-c7 Rc1xc7 Qd8xc7 f2-f3 Qc7-c3
22 00:04 45,611k 9,717k +0.44 Rc2-c7 Bd7-e8 Ke1-f1 Rf8-f7 Rc7xf7 Be8xf7 Qf3-d3 Rb8-c8 Rc1-c4 Rc8xc4 Qd3xc4 Qd8-b6 h3-h4 Bf7-e8 Qc4-c8 Be8-b5 Qc8-f5+ Kh7-g8 Qf5-e6+ Kg8-h7 g4-g5 h6xg5 h4xg5 Bb5xe2+ Kf1xe2 Qb6-b5+ Ke2-d2 Qb5-c5 g5-g6+ Kh7-h6
23- 00:04 47,097k 9,759k +0.36 Rc2-c7 Bd7-e8 Ke1-f1 Rf8-f7 Rc7xf7 Be8xf7 Qf3-d3 Rb8-c8 Rc1-c4 Rc8xc4 Qd3xc4 Qd8-b6 h3-h4 Bf7-e8 Qc4-c8 Be8-b5 Qc8-f5+ Kh7-g8 Qf5-e6+ Kg8-h7 g4-g5 h6xg5 h4xg5 Bb5xe2+ Kf1xe2 Qb6-b5+ Ke2-d2 Qb5-c5 g5-g6+ Kh7-h6
23 00:05 49,285k 9,839k +0.36 Rc2-c7 Bd7-e8 Ke1-f1 Rf8-f7 Rc7xf7 Be8xf7 Qf3-d3 Rb8-c8 Rc1-c4 Rc8xc4 Qd3xc4 Qd8-b6 h3-h4 Bf7-e8 Qc4-c8 Be8-b5 Qc8-f5+ Kh7-g8 Qf5-e6+ Kg8-h7 g4-g5 h6xg5 Qe6-f5+ g7-g6 Qf5-f7+ Kh7-h6 Qf7-f8+ Kh6-h7 Qf8-e7+ Kh7-g8 h4xg5
24 00:05 61,786k 10,414k +0.36 Rc2-c7 Bd7-e8 Qf3-g2 Rf8-f7 Rc7-c2 g7-g6 f2-f3 Qd8-a5 Ke1-f1 Rb8-b7 Be2-d3 Kh7-g7 Qg2-d2 Qa5-b6 Qd2-f2 Qb6-a5 Kf1-g2 Rf7-c7 Qf2-e1 Rc7xc2+ Rc1xc2 Qa5-b6 Qe1-f2 Qb6-e3 Bd3-a6
25- 00:06 73,119k 10,824k +0.28 Rc2-c7 Rf8-f7 Qf3-d3 f4-f3 Be2-f1 Bd7-b5 Qd3-c2 Rf7xc7 Qc2xc7 Bb5xf1 Ke1xf1 Qd8-g5 Kf1-e1 Qg5-f4 Rc1-c4 Rb8-b5 Qc7-c8 Rb5-c5 Qc8-a6 Rc5xc4 Qa6xc4 Qf4-h2
25- 00:07 85,912k 11,060k +0.20 Rc2-c7 Rf8-f7 Qf3-d3 f4-f3 Be2-f1 Bd7-b5 Qd3-c2 Rf7xc7 Qc2xc7 Bb5xf1 Ke1xf1 Qd8-g5 Rc1-c2 Qg5-f4 Qc7xd6 Qf4-h2
25 00:09 107,666k 11,462k +0.16 Rc2-c7 Rf8-f7 Qf3-d3 f4-f3 Be2-f1 Bd7-b5 Qd3-c2 Rf7xc7 Qc2xc7 Bb5xf1 Ke1xf1 Qd8-g5 Rc1-d1 Qg5-d8 Qc7xd8 Rb8xd8 Rd1-c1 Kh7-g6 h3-h4 Rd8-f8 Rc1-c6 Rf8-f4 Rc6xd6+ Kg6-h7 g4-g5 h6xg5 h4xg5 Rf4xe4 Rd6-b6 Re4-e2 Rb6xb4 Re2xa2
26 00:27 344,496k 12,465k +0.12 Rc2-c7 Rf8-f7 Rc7-c4 Rf7-f6 Be2-d3 Qd8-b6 Ke1-f1 Rf6-f7 Kf1-g1 g7-g6 Bd3-f1 Kh7-g7 Qf3-d1 f4-f3 Qd1-d2 h6-h5 g4-g5 Kg7-g8 Rc4-c7 Kg8-g7 Kg1-h2 Kg7-g8 Bf1-d3 Kg8-g7 h3-h4 Qb6-d4 Kh2-h1
27 00:30 380,817k 12,413k +0.16 Rc2-c7 Rf8-f7 Rc7-c4 Rf7-f6 Be2-d3 Qd8-b6 Ke1-f1 Rf6-f7 Qf3-d1 Qb6-d8 Kf1-e1 Qd8-h4 Qd1-f3 Qh4-d8 Rc4-c2 Qd8-b6 Bd3-e2 Rf7-f8 Qf3-d3 f4-f3 Be2-f1 Kh7-g8 Rc2-c7 Rb8-c8 Rc7xc8 Rf8xc8 Rc1xc8+ Bd7xc8 Qd3-e3 Qb6xe3+ f2xe3
28- 00:37 468,499k 12,375k +0.08 Rc2-c7 Rf8-f7 Rc7-c4 Rf7-f8 Rc4-c2 Qd8-b6 Qf3-d3 Rb8-a8 Rc2-c7 Rf8-c8 Rc7xc8 Ra8xc8 Rc1xc8 Bd7xc8 Qd3-b5 Qb6-d4 Qb5-c4 Qd4xc4 Be2xc4 Kh7-g6 Ke1-e2 Bc8-d7 Ke2-d2 Kg6-g5 Bc4-e2 Kg5-h4 Be2-f1 Bd7-c8 Kd2-c2 Bc8-d7
28- 00:47 590,186k 12,447k 0.00 Rc2-c7 Rf8-f7 Rc7-c4 Rf7-f8 Rc4-c2 Qd8-b6 Qf3-d3 Rb8-a8 Rc2-c7 Rf8-c8 Rc7xc8 Ra8xc8 Rc1xc8 Bd7xc8 Qd3-b5 Qb6-d4 Qb5-c4 Qd4xc4 Be2xc4 Kh7-g6 Ke1-e2 Bc8-d7 Ke2-d2 Kg6-g5 Bc4-e2 Kg5-h4 Be2-f1 Kh4-g5 Bf1-d3 Kg5-h4 Bd3-f1
28 00:56 715,136k 12,585k 0.00 Rc2-c7 Rf8-f7 Rc7-c4 Rf7-f8 Rc4-c2 Qd8-b6 Qf3-d3 Rb8-a8 Rc2-c7 Rf8-c8 Rc7xc8 Ra8xc8 Rc1xc8 Bd7xc8 Qd3-b5 Qb6-d4 Qb5-c4 Qd4xc4 Be2xc4 Kh7-g6 f2-f3 Kg6-g5 Ke1-f2 Bc8-d7 Bc4-d3 Kg5-h4 Kf2-g2 Kh4-g5 Kg2-f2
29 00:59 743,491k 12,582k 0.00 Rc2-c7 Rf8-f7 Rc7-c4 Rf7-f8 Rc4-c2 Qd8-b6 Qf3-d3 Rb8-a8 Rc2-c7 Rf8-c8 Rc7xc8 Ra8xc8 Rc1xc8 Bd7xc8 Qd3-b5 Qb6-d4 Qb5-c4 Qd4xc4 Be2xc4 Kh7-g6 f2-f3 Kg6-g5 Ke1-f2 Bc8-d7 Bc4-d3 Kg5-h4 Kf2-g2 Kh4-g5 Kg2-f2
30 01:03 802,035k 12,621k 0.00 Rc2-c7 Rf8-f7 Rc7-c4 Rf7-f8 Rc4-c2 Qd8-b6 Qf3-d3 Rb8-a8 Rc2-c7 Rf8-c8 Rc7xc8 Ra8xc8 Rc1xc8 Bd7xc8 Qd3-b5 Qb6-d4 Qb5-c4 Qd4xc4 Be2xc4 Kh7-g6 f2-f3 Kg6-g5 Ke1-f2 Bc8-d7 Bc4-d3 Kg5-h4 Kf2-g2 Kh4-g5 Kg2-f2
31 01:08 864,228k 12,651k 0.00 Rc2-c7 Rf8-f7 Rc7-c4 Rf7-f8 Rc4-c2 Qd8-b6 Qf3-d3 Rb8-a8 Rc2-c7 Rf8-c8 Rc7xc8 Ra8xc8 Rc1xc8 Bd7xc8 Qd3-b5 Qb6-d4 Qb5-c6 Bc8-b7 Qc6xb7 Qd4-c3+ Ke1-f1 Qc3xh3+ Kf1-g1 f4-f3 Be2-f1 Qh3xg4+ Kg1-h2 Qg4-h4+ Kh2-g1 Qh4-g4+
32 01:14 944,838k 12,711k 0.00 Rc2-c7 Rf8-f7 Rc7-c4 Rf7-f8 Rc4-c2 Qd8-b6 Qf3-d3 Rb8-a8 Rc2-c7 Rf8-c8 Rc7xc8 Ra8xc8 Rc1xc8 Bd7xc8 Qd3-b5 Qb6-d4 Qb5-c6 Bc8-b7 Qc6xb7 Qd4-c3+ Ke1-f1 Qc3xh3+ Kf1-g1 f4-f3 Be2-f1 Qh3xg4+ Kg1-h2 Qg4-h4+ Kh2-g1 Qh4-g4+
33 01:23 1,067,285k 12,776k 0.00 Rc2-c7 Rf8-f7 Rc7-c4 Rf7-f8 Rc4-c2 Qd8-b6 Qf3-d3 Rb8-a8 Rc2-c7 Rf8-c8 Rc7xc8 Ra8xc8 Rc1xc8 Bd7xc8 Qd3-b5 Qb6-d4 Qb5-c6 Bc8-b7 Qc6xb7 Qd4-c3+ Ke1-f1 Qc3xh3+ Kf1-g1 f4-f3 Be2-f1 Qh3xg4+ Kg1-h2 Qg4-h4+ Kh2-g1 Qh4-g4+
34 01:31 1,166,723k 12,817k 0.00 Rc2-c7 Rf8-f7 Rc7-c4 Rf7-f8 Rc4-c2 Qd8-b6 Qf3-d3 Rb8-a8 Rc2-c7 Rf8-c8 Rc7xc8 Ra8xc8 Rc1xc8 Bd7xc8 Qd3-b5 Qb6-d4 Qb5-c6 Bc8-b7 Qc6xb7 Qd4-c3+ Ke1-f1 Qc3xh3+ Kf1-g1 f4-f3 Be2-f1 Qh3xg4+ Kg1-h2 Qg4-h4+ Kh2-g1 Qh4-g4+
35 01:40 1,299,386k 12,878k 0.00 Rc2-c7 Rf8-f7 Rc7-c4 Rf7-f8 Rc4-c2 Qd8-b6 Qf3-d3 Rb8-a8 Rc2-c7 Rf8-c8 Rc7xc8 Ra8xc8 Rc1xc8 Bd7xc8 Qd3-b5 Qb6-d4 Qb5-c6 Bc8-b7 Qc6xb7 Qd4-c3+ Ke1-f1 Qc3xh3+ Kf1-g1 f4-f3 Be2-f1 Qh3xg4+ Kg1-h2 Qg4-h4+ Kh2-g1 Qh4-g4+
35+ 02:45 2,159,779k 13,080k +0.08 Qf3-d3 Bd7-b5 Qd3-d2 Bb5xe2 Ke1xe2
36 03:07 2,457,625k 13,087k 0.00 Rc2-c7 Rf8-f7 Rc7-c4 Rf7-f8 Rc4-c2 Qd8-b6 Qf3-d3 Rb8-a8 Rc2-c7 Rf8-c8 Rc7xc8 Ra8xc8 Rc1xc8 Bd7xc8 Qd3-b5 Qb6-d4 Qb5-c6 Bc8-b7 Qc6xb7 Qd4-c3+ Ke1-f1 Qc3xh3+ Kf1-g1 f4-f3 Be2-f1 Qh3xg4+ Kg1-h2 Qg4-h4+ Kh2-g1 Qh4-g4+
37 03:37 2,857,353k 13,144k 0.00 Rc2-c7 Rf8-f7 Rc7-c4 Rf7-f8 Rc4-c2 Qd8-b6 Qf3-d3 Rb8-a8 Rc2-c7 Rf8-c8 Rc7xc8 Ra8xc8 Rc1xc8 Bd7xc8 Qd3-b5 Qb6-d4 Qb5-c6 Bc8-b7 Qc6xb7 Qd4-c3+ Ke1-f1 Qc3xh3+ Kf1-g1 f4-f3 Be2-f1 Qh3xg4+ Kg1-h2 Qg4-h4+ Kh2-g1 Qh4-g4+
38 03:59 3,153,012k 13,172k 0.00 Rc2-c7 Rf8-f7 Rc7-c4 Rf7-f8 Rc4-c2 Qd8-b6 Qf3-d3 Rb8-a8 Rc2-c7 Rf8-c8 Rc7xc8 Ra8xc8 Rc1xc8 Bd7xc8 Qd3-b5 Qb6-d4 Qb5-c6 Bc8-b7 Qc6xb7 Qd4-c3+ Ke1-f1 Qc3xh3+ Kf1-g1 f4-f3 Be2-f1 Qh3xg4+ Kg1-h2 Qg4-h4+ Kh2-g1 Qh4-g4+
39 04:59 3,924,998k 13,104k 0.00 Rc2-c7 Rf8-f7 Rc7-c4 Rf7-f8 Rc4-c2 Qd8-b6 Qf3-d3 Rb8-a8 Rc2-c7 Rf8-c8 Rc7xc8 Ra8xc8 Rc1xc8 Bd7xc8 Qd3-b5 Qb6-d4 Qb5-c6 Bc8-b7 Qc6xb7 Qd4-c3+ Ke1-f1 Qc3xh3+ Kf1-g1 f4-f3 Be2-f1 Qh3xg4+ Kg1-h2 Qg4-h4+ Kh2-g1 Qh4-g4+
40 07:34 5,904,031k 12,987k 0.00 Rc2-c7 Rf8-f7 Rc7-c4 Rf7-f8 Rc4-c2 Qd8-b6 Qf3-d3 Rb8-a8 Rc2-c7 Rf8-c8 Rc7xc8 Ra8xc8 Rc1xc8 Bd7xc8 Qd3-b5 Qb6-d4 Qb5-c6 Bc8-b7 Qc6xb7 Qd4-c3+ Ke1-f1 Qc3xh3+ Kf1-g1 f4-f3 Be2-f1 Qh3xg4+ Kg1-h2 Qg4-h4+ Kh2-g1 Qh4-g4+
41 13:21 10,116,742k 12,625k 0.00 Rc2-c7 Rf8-f7 Rc7-c4 Rf7-f8 Rc4-c2 Qd8-b6 Qf3-d3 Rb8-a8 Rc2-c7 Rf8-c8 Rc7xc8 Ra8xc8 Rc1xc8 Bd7xc8 Qd3-b5 Qb6-d4 Qb5-c6 Bc8-b7 Qc6xb7 Qd4-c3+ Ke1-f1 Qc3xh3+ Kf1-g1 f4-f3 Be2-f1 Qh3xg4+ Kg1-h2 Qg4-h4+ Kh2-g1 Qh4-g4+
42 17:07 13,143,498k 12,788k 0.00 Rc2-c7 Rf8-f7 Rc7-c4 Rf7-f8 Rc4-c2 Qd8-b6 Qf3-d3 Rb8-a8 Rc2-c7 Rf8-c8 Rc7xc8 Ra8xc8 Rc1xc8 Bd7xc8 Qd3-b5 Qb6-d4 Qb5-c6 Bc8-b7 Qc6xb7 Qd4-c3+ Ke1-f1 Qc3xh3+ Kf1-g1 f4-f3 Be2-f1 Qh3xg4+ Kg1-h2 Qg4-h4+ Kh2-g1 Qh4-g4+
43 20:44 15,976,435k 12,834k 0.00 Rc2-c7 Rf8-f7 Rc7-c4 Rf7-f8 Rc4-c2 Qd8-b6 Qf3-d3 Rb8-a8 Rc2-c7 Rf8-c8 Rc7xc8 Ra8xc8 Rc1xc8 Bd7xc8 Qd3-b5 Qb6-d4 Qb5-c6 Bc8-b7 Qc6xb7 Qd4-c3+ Ke1-f1 Qc3xh3+ Kf1-g1 f4-f3 Be2-f1 Qh3xg4+ Kg1-h2 Qg4-h4+ Kh2-g1 Qh4-g4+

[Uri Blass]

כfinal move is 47. Rc7
[d][1r1q1r2/3b2pk/3p3p/3Pp3/1p2PpP1/pP3Q1P/P1R1BP2/2R1K3 w - - 24 47/fen]

Stockfish-191-64-ja:

42 17:07 13,143,498k 12,788k 0.00 Rc2-c7 Rf8-f7 Rc7-c4 Rf7-f8 Rc4-c2 Qd8-b6 Qf3-d3 Rb8-a8 Rc2-c7 Rf8-c8 Rc7xc8 Ra8xc8 Rc1xc8 Bd7xc8 Qd3-b5 Qb6-d4 Qb5-c6 Bc8-b7 Qc6xb7 Qd4-c3+ Ke1-f1 Qc3xh3+ Kf1-g1 f4-f3 Be2-f1 Qh3xg4+ Kg1-h2 Qg4-h4+ Kh2-g1 Qh4-g4+
43 20:44 15,976,435k 12,834k 0.00 Rc2-c7 Rf8-f7 Rc7-c4 Rf7-f8 Rc4-c2 Qd8-b6 Qf3-d3 Rb8-a8 Rc2-c7 Rf8-c8 Rc7xc8 Ra8xc8 Rc1xc8 Bd7xc8 Qd3-b5 Qb6-d4 Qb5-c6 Bc8-b7 Qc6xb7 Qd4-c3+ Ke1-f1 Qc3xh3+ Kf1-g1 f4-f3 Be2-f1 Qh3xg4+ Kg1-h2 Qg4-h4+ Kh2-g1 Qh4-g4+
44 25:26 19,724,773k 12,919k 0.00 Rc2-c7 Rf8-f7 Rc7-c4 Rf7-f8 Rc4-c2 Qd8-b6 Qf3-d3 Rb8-a8 Rc2-c7 Rf8-c8 Rc7xc8 Ra8xc8 Rc1xc8 Bd7xc8 Qd3-b5 Qb6-d4 Qb5-c6 Bc8-b7 Qc6xb7 Qd4-c3+ Ke1-f1 Qc3xh3+ Kf1-g1 f4-f3 Be2-f1 Qh3xg4+ Kg1-h2 Qg4-h4+ Kh2-g1 Qh4-g4+
45 34:49 27,229,962k 13,031k 0.00 Rc2-c7 Rf8-f7 Rc7-c4 Rf7-f8 Rc4-c2 Qd8-b6 Qf3-d3 Rb8-a8 Rc2-c7 Rf8-c8 Rc7xc8 Ra8xc8 Rc1xc8 Bd7xc8 Qd3-b5 Qb6-d4 Qb5-c6 Bc8-b7 Qc6xb7 Qd4-c3+ Ke1-f1 Qc3xh3+ Kf1-g1 f4-f3 Be2-f1 Qh3xg4+ Kg1-h2 Qg4-h4+ Kh2-g1 Qh4-g4+
46 44:05 34,885,817k 13,187k 0.00 Rc2-c7 Rf8-f7 Rc7-c4 Rf7-f8 Rc4-c2 Qd8-b6 Qf3-d3 Rb8-a8 Rc2-c7 Rf8-c8 Rc7xc8 Ra8xc8 Rc1xc8 Bd7xc8 Qd3-b5 Qb6-d4 Qb5-c6 Bc8-b7 Qc6xb7 Qd4-c3+ Ke1-f1 Qc3xh3+ Kf1-g1 f4-f3 Be2-f1 Qh3xg4+ Kg1-h2 Qg4-h4+ Kh2-g1 Qh4-g4+
47 1:09:03 54,807,038k 13,226k 0.00 Rc2-c7 Rf8-f7 Rc7-c4 Rf7-f8 Rc4-c2 Qd8-b6 Qf3-d3 Rb8-a8 Rc2-c7 Rf8-c8 Rc7xc8 Ra8xc8 Rc1xc8 Bd7xc8 Qd3-b5 Qb6-d4 Qb5-c6 Bc8-b7 Qc6xb7 Qd4-c3+ Ke1-f1 Qc3xh3+ Kf1-g1 f4-f3 Be2-f1 Qh3xg4+ Kg1-h2 Qg4-h4+ Kh2-g1 Qh4-g4+
48 1:40:41 79,671,471k 13,188k 0.00 Rc2-c7 Rf8-f7 Rc7-c4 Rf7-f8 Rc4-c2 Qd8-b6 Qf3-d3 Rb8-a8 Rc2-c7 Rf8-c8 Rc7xc8 Ra8xc8 Rc1xc8 Bd7xc8 Qd3-b5 Qb6-d4 Qb5-c6 Bc8-b7 Qc6xb7 Qd4-c3+ Ke1-f1 Qc3xh3+ Kf1-g1 f4-f3 Be2-f1 Qh3xg4+ Kg1-h2 Qg4-h4+ Kh2-g1 Qh4-g4+

[Leto]

I offer a draw, but in case you would like to continue:

After: 1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. Nc3 Bb4 5. Qa4+ Nc6 6. e3 O-O
7. Bd2 dxc4 8. Bxc4 Bd6 9. O-O e5 10. d5 Ne7 11. e4 a6 12. Qc2 b5 13. Bb3 Bg4
14. Qd3 Ng6 15. h3 Bd7 16. Ne2 Nh5 17. Rac1 a5 18. g4 Nhf4 19. Nxf4 exf4 20.
Rfe1 Re8 21. Bc3 f6 22. Bd1 Qe7 23. Qc2 b4 24. Bd4 a4 25. Bc5 a3 26. b3 Ne5
27. Nxe5 fxe5 28. Kg2 Ra5 29. Bxd6 cxd6 30. Qd2 Rb5 31. Bf3 Rb7 32. Rh1 Reb8
33. Rc2 Rf8 34. Rhc1 h6 35. Rc4 Kh7 36. Rc7 Rfb8 37. Be2 Kg6 38. R7c2 Qg5 39.
Qd3 Ra7 40. Kf1 Qh4 41. Kg1 Rf8 42. Qf3 Qg5 43. Kf1 Kh7 44. Rc4 Rb7 45. Ke1
Qd8 46. R4c2 Rb8 47. Rc7 Rf7 48. R7c4 *

Sf17.1 plays 47...Rf7

analysis:

[-0.04] d=55 47...Rf7 48.R7c4 Kh8 49.Bf1 Be8 50.R4c2 Ra7 51.Qe2 Kh7 52.Kd1 Qh4 53.f3 Kg6 54.Qg2 Kg5 55.Bd3 Bd7 56.Kd2 Rbb7 57.Be2 Kg6 58.Qg1 Kh7 59.Qe1 Qd8 60.Kd1 g5 61.Qg1 Kg6 62.Bf1 Ra8 63.Kd2 Qa5 64.Be2 Rh8 65.Rc4 Kg7 66.Bf1 h5 67.gxh5 Rxh5 68.R4c2 Kh6 69.Rc8(0:19:54) 12087781kN
[-0.04] d=54 47...Rf7 48.R7c4 Kh8 49.Bf1 Be8 50.R4c2 Ra7 51.Qe2 Kh7 52.Kd1 Qh4 53.f3 Kg6 54.Qg2 Kg5 55.Bd3 Bd7 56.Kd2 Rbb7 57.Be2 Kg6 58.Qg1 Kh7 59.Qe1 Qd8 60.Kd1 g5 61.Qg1 Kg6 62.Bf1 Ra8 63.Kd2 Qa5 64.Be2 Rh8 65.Rc4 Kg7 66.Bf1 h5 67.gxh5 Rxh5 68.R4c2 Kh6 69.Rc8 Bxc8(0:19:50) 12049297kN
[-0.07] d=54 47...Rf7 48.R7c4 Kg8 49.Bf1 Be8 50.Be2 g6 51.Bf1 Rfb7 52.Qg2 Bb5 53.R4c2 Bd7 54.f3 Rc8 55.Rxc8 Bxc8 56.Qf2 Bd7 57.Rc2 Kg7 58.Ba6 Rb6 59.Bf1 g5 60.Kd1 Kg6 61.Qg1 Kf7 62.Qf2 Kg7 63.Ke1(0:19:35) 11899133kN
[-0.05] d=54 47...Rf7 48.R7c4 Kg8 49.Bf1 Be8 50.Be2 g6 51.Bf1 Rfb7 52.Qg2 Bb5 53.R4c2 Bd7 54.f3 Rc8 55.Rxc8 Bxc8 56.Qf2 Bd7 57.Rc2 Kg7 58.Ba6 Rb6 59.Bf1 g5 60.Kd1 Kg6 61.Qg1 Kf7 62.Qf2 Kg7 63.Ke1 Be8(0:18:29) 11265385kN
[-0.08] d=54 47...Rf7 48.R7c4 Kg8 49.Bf1 Be8 50.Be2 g6 51.Bf1 Rfb7 52.Qg2 Bb5 53.R4c2 Bd7 54.f3 Rc8 55.Rxc8 Bxc8 56.Qf2 Bd7 57.Rc2 Kg7 58.Ba6 Rb6 59.Bf1 g5 60.Kd1 Kg6 61.Qg1 Kf7 62.Qf2 Kg7 63.Ke1 Be8 64.Kd1(0:18:24) 11218525kN
[-0.07] d=54 47...Rf7 48.R7c4 Kg8 49.Bf1 Be8 50.Be2 g6 51.Bf1 Rfb7 52.Qg2 Bb5 53.R4c2 Bd7 54.f3 Rc8 55.Rxc8 Bxc8 56.Qf2 Bd7 57.Rc2 Kg7 58.Ba6 Rb6 59.Bf1 g5 60.Kd1 Kg6 61.Qg1 Kf7 62.Qf2 Kg7 63.Ke1 Be8 64.Kd1 Kh7(0:18:14) 11116881kN
[-0.05] d=53 47...Rf7 48.R7c4 Kg8 49.Bf1 Be8 50.Be2 g6 51.Bf1 Rfb7 52.Qg2 Bb5 53.R4c2 Bd7 54.f3 Rc8 55.Rxc8 Bxc8 56.Qf2 Bd7 57.Rc2 Kg7 58.Ba6 Rb6 59.Bf1 g5 60.Kd1 Kg6 61.Qg1 Kf7 62.Qf2 Kg7 63.Ke1 Be8 64.Kd1 Kh7 65.Bc4(0:17:54) 10926005kN
[-0.14] d=53 47...Rf7 48.R7c4 Be8 49.Kd2 Rfb7 50.Qg2 Qg5 51.f3 Qh4 52.R4c2 Ra8 53.Bd3 Bd7 54.Be2 Qd8 55.Qf2 Rc8 56.Rxc8 Bxc8 57.h4 Rc7 58.Rc4 Rxc4 59.Bxc4 Qa5 60.h5 Kg8 61.Ke1 Bd7 62.Kf1 Kf8 63.Kg2 Ke7 64.Kf1 Kd8 65.Qh4 Ke8 66.Qf2 Qc7 67.Ke1 Ke7 68.Kf1 Kd8 69.Kg2 Ke8 70.Kf1 Qa5 71.Kg1 Bc8 72.Kf1(0:17:06) 10456375kN
[-0.11] d=53 47...Rf7 48.R7c4 Be8 49.Kd2 Rfb7 50.Qg2 Qg5 51.f3 Qh4 52.R4c2 Ra8 53.Bd3 Bd7 54.Be2 Qd8 55.Qf2 Rc8 56.Rxc8 Bxc8 57.h4 Rc7 58.Rc4 Rxc4 59.Bxc4 Qa5 60.h5 Kg8 61.Ke1 Bd7 62.Kf1 Kf8 63.Kg2 Ke7 64.Kf1 Kd8 65.Qh4 Ke8 66.Qf2 Qc7 67.Ke1 Ke7 68.Kf1 Kd8 69.Kg2 Ke8 70.Kf1 Qa5 71.Kg1 Bc8 72.Kf1 Qc7(0:17:05) 10450550kN
[-0.09] d=53 47...Rf7 48.R7c4 Be8 49.Kd2 Rfb7 50.Qg2 Qg5 51.f3 Qh4 52.R4c2 Ra8 53.Bd3 Bd7 54.Be2 Qd8 55.Qf2 Rc8 56.Rxc8 Bxc8 57.h4 Rc7 58.Rc4 Rxc4 59.Bxc4 Qa5 60.h5 Kg8 61.Ke1 Bd7 62.Kf1 Kf8 63.Kg2 Ke7 64.Kf1 Kd8 65.Qh4 Ke8 66.Qf2 Qc7 67.Ke1 Ke7 68.Kf1 Kd8 69.Kg2 Ke8 70.Kf1 Qa5 71.Kg1 Bc8 72.Kf1 Qc7 73.Kg2(0:17:05) 10447722kN
[-0.07] d=53 47...Rf7 48.R7c4 Be8 49.Kd2 Rfb7 50.Qg2 Qg5 51.f3 Qh4 52.R4c2 Ra8 53.Bd3 Bd7 54.Be2 Qd8 55.Qf2 Rc8 56.Rxc8 Bxc8 57.h4 Rc7 58.Rc4 Rxc4 59.Bxc4 Qa5 60.h5 Kg8 61.Ke1 Bd7 62.Kf1 Kf8 63.Kg2 Ke7 64.Kf1 Kd8 65.Qh4 Ke8 66.Qf2 Qc7 67.Ke1 Ke7 68.Kf1 Kd8 69.Kg2 Ke8 70.Kf1 Qa5 71.Kg1 Bc8 72.Kf1 Qc7 73.Kg2 Kd8(0:17:03) 10434630kN
[-0.06] d=53 47...Rf7 48.R7c4 Be8 49.Kd2 Rfb7 50.Qg2 Qg5 51.f3 Qh4 52.R4c2 Ra8 53.Bd3 Bd7 54.Be2 Qd8 55.Qf2 Rc8 56.Rxc8 Bxc8 57.h4 Rc7 58.Rc4 Rxc4 59.Bxc4 Qa5 60.h5 Kg8 61.Ke1 Bd7 62.Kf1 Kf8 63.Kg2 Ke7 64.Kf1 Kd8 65.Qh4 Ke8 66.Qf2 Qc7 67.Ke1 Ke7 68.Kf1 Kd8 69.Kg2 Ke8 70.Kf1 Qa5 71.Kg1 Bc8 72.Kf1 Qc7 73.Kg2 Kd8 74.Qh4(0:17:03) 10432787kN
[-0.07] d=52 47...Rf7 48.R7c4 Be8 49.Kd2 Rfb7 50.Qg2 Qg5 51.f3 Qh4 52.R4c2 Ra8 53.Bd3 Bd7 54.Be2 Qd8 55.Qf2 Rc8 56.Rxc8 Bxc8 57.h4 Rc7 58.Rc4 Rxc4 59.Bxc4 Qa5 60.h5 Kg8 61.Ke1 Bd7 62.Kf1 Kf8 63.Kg2 Ke7 64.Kf1 Kd8 65.Qh4 Ke8 66.Qf2 Qc7 67.Ke1 Ke7 68.Kf1 Kd8 69.Kg2 Ke8 70.Kf1 Qa5 71.Kg1 Bc8 72.Kf1 Qc7 73.Kg2 Kd8 74.Qh4 Qe7(0:16:42) 10230408kN
[-0.06] d=52 47...Rf7 48.R7c4 Be8 49.Kd2 Qb6 50.Ke1 g6 51.R4c2 Kg7 52.Qd3 Ra7 53.h4 Bd7 54.Qh3 Qd8 55.h5 g5 56.Qd3 Kf6 57.Qd2 Qa5 58.Rc4 Qb6 59.Bf1 Ke7 60.f3 Raa8 61.Kd1 Qg1 62.Qe1 Rc8 63.Be2 Qxe1 64.Kxe1 Rxc4 65.Bxc4 Kd8 66.Kd2(0:15:42) 9682060kN
[-0.08] d=52 47...Rf7 48.R7c4 Be8 49.Kd2 Qb6 50.Ke1 g6 51.R4c2 Kg7 52.Qd3 Ra7 53.h4 Bd7 54.Qh3 Qd8 55.h5 g5 56.Qd3 Kf6 57.Qd2 Qa5 58.Rc4 Qb6 59.Bf1 Ke7 60.f3 Raa8 61.Kd1 Qg1 62.Qe1 Rc8 63.Be2 Qxe1 64.Kxe1 Rxc4 65.Bxc4 Kd8 66.Kd2 Rc8(0:15:38) 9648425kN
[-0.10] d=52 47...Rf7 48.R7c4 Be8 49.Kd2 Qb6 50.Ke1 g6 51.R4c2 Kg7 52.Qd3 Ra7 53.h4 Bd7 54.Qh3 Qd8 55.h5 g5 56.Qd3 Kf6 57.Qd2 Qa5 58.Rc4 Qb6 59.Bf1 Ke7 60.f3 Raa8 61.Kd1 Qg1 62.Qe1 Rc8 63.Be2 Qxe1 64.Kxe1 Rxc4 65.Bxc4 Kd8 66.Kd2 Rc8 67.Ke2(0:15:36) 9636994kN
[-0.14] d=52 47...Rf7 48.R7c4 Be8 49.Kd2 Qb6 50.Ke1 g6 51.R4c2 Kg7 52.Qd3 Ra7 53.h4 Bd7 54.Qh3 Qd8 55.h5 g5 56.Qd3 Kf6 57.Qd2 Qa5 58.Rc4 Qb6 59.Bf1 Ke7 60.f3 Raa8 61.Kd1 Qg1 62.Qe1 Rc8 63.Be2 Qxe1 64.Kxe1 Rxc4 65.Bxc4 Kd8 66.Kd2 Rc8 67.Ke2 Rc7(0:15:35) 9623290kN
[-0.13] d=52 47...Rf7 48.R7c4 Be8 49.Kd2 Qb6 50.Ke1 g6 51.R4c2 Kg7 52.Qd3 Ra7 53.h4 Bd7 54.Qh3 Qd8 55.h5 g5 56.Qd3 Kf6 57.Qd2 Qa5 58.Rc4 Qb6 59.Bf1 Ke7 60.f3 Raa8 61.Kd1 Qg1 62.Qe1 Rc8 63.Be2 Qxe1 64.Kxe1 Rxc4 65.Bxc4 Kd8 66.Kd2 Rc8 67.Ke2 Rc7 68.Kd3(0:15:35) 9619675kN
[-0.11] d=51 47...Rf7 48.R7c4 Be8 49.Kd2 Qb6 50.Ke1 g6 51.R4c2 Kg7 52.Qd3 Ra7 53.h4 Bd7 54.Qh3 Qd8 55.h5 g5 56.Qd3 Kf6 57.Qd2 Qa5 58.Rc4 Qb6 59.Bf1 Ke7 60.f3 Raa8 61.Kd1 Qg1 62.Qe1 Rc8 63.Be2 Qxe1 64.Kxe1 Rxc4 65.Bxc4 Kd8 66.Kd2 Rc8 67.Ke2 Rc7 68.Kd3 Rc5(0:15:33) 9607312kN
[-0.15] d=51 47...Rf7 48.R7c4 Rb7 49.R4c2 Rf8 50.Bf1 Rh8 51.Be2 g6 52.Qg2 Kg7 53.f3 h5 54.g5 Qa5 55.h4 Ra8 56.Rc4 Raa7 57.Bf1 Rc7 58.Qd2 Rxc4 59.Rxc4 Rb7 60.Qc2 Kf7 61.Qd2 Ke7 62.Qf2 Rc7 63.Be2 Ke8 64.Bf1 Rxc4 65.Bxc4 Qc7 66.Kd2 Kf8 67.Ke1 Ke7 68.Qd2(0:15:31) 9588526kN

[jkominek]

Looks like your draw offer has been agree to in this correspondence game and that the reverse will not be played. I was hoping you would flip colors to see if old Stockfish could hold as Black.

Reading the posts it occurred to me that you really didn't know what to expect because you do not have the big picture of performance trends. At the outset I had a pretty good idea of what to expect and knew that you were giving new Stockfish way too much time for an even match. But, I had no data on SF 17.1 vs. SF 1.91 specifically. So, while the correspondence game was taking place I spent those couple weeks gathering some data points to share.

My approach is to conduct fixed node matches with a doubling of nodes per move between matches. This provides a machine-independent "skeleton" against which I can calibrate machine-dependent runs at time controls. I use Chess324 as an opening book. Chess324 is mid-way in its characteristics between a balanced book and an unbalanced book such as S. Pohl's UHO offerings.

In your first match you gave SF 17.1 60s per game, 12 threads. Then in your second match you reduced it to 0.25s / move, 8 threads. To get a calibration of these settings I got the following nearest-neighbor comparisons. My testing machine is an Intel Xeon Gold 6248R. I'll hand wave and say that's close enough to your machine for discussion.

Code: Select all

Stockfish 17o1 Hash 256 Threads 12 TC 60 vs.         Stockfish 17o1 Hash 512 Threads 1 Nodes 8388608  [26, 578, 44] -9.7 Elo
Stockfish 17o1 Hash 512 Threads 8 MoveTime 0.25s vs. Stockfish 17o1 Hash 512 Threads 1 Nodes 1048576  [28, 541, 79] -27.4 Elo

That's nice but how can it be related to SF 1.91? To put these in perspective I've plotted these points against the curves of SF 17.1 and SF 1.91. And for good measure five intervening Stockfish families are included.

https://imgur.com/a/EZPnuYE (I seem not to have luck with image embedding using the img tag, so I've included an imgur url.)

The top horizontal line marks the estimated strength of SF 17.1 in your first match. Correspondingly, the lower line for your second match.

What jumps out at a glance is that there is no way you were going to have an even match against SF 1.91. The time odds needed for a balanced pairing are too vast to be practical. That's not to say you could not get a draw from the standard opening position, which you did eventually get with the correspondence game. But if tested on a diverse distribution of positions matches 1 and 2 are no contest.

In my next post I'll try to estimate where you would have had to set Stockfish 17.1 (retrospectively) for balanced competition in your third and fourth matches.

[Uri Blass]

Looks like your draw offer has been agree to in this correspondence game and that the reverse will not be played. I was hoping you would flip colors to see if old Stockfish could hold as Black.

Reading the posts it occurred to me that you really didn't know what to expect because you do not have the big picture of performance trends. At the outset I had a pretty good idea of what to expect and knew that you were giving new Stockfish way too much time for an even match. But, I had no data on SF 17.1 vs. SF 1.91 specifically. So, while the correspondence game was taking place I spent those couple weeks gathering some data points to share.

My approach is to conduct fixed node matches with a doubling of nodes per move between matches. This provides a machine-independent "skeleton" against which I can calibrate machine-dependent runs at time controls. I use Chess324 as an opening book. Chess324 is mid-way in its characteristics between a balanced book and an unbalanced book such as S. Pohl's UHO offerings.

In your first match you gave SF 17.1 60s per game, 12 threads. Then in your second match you reduced it to 0.25s / move, 8 threads. To get a calibration of these settings I got the following nearest-neighbor comparisons. My testing machine is an Intel Xeon Gold 6248R. I'll hand wave and say that's close enough to your machine for discussion.

Code: Select all

Stockfish 17o1 Hash 256 Threads 12 TC 60 vs.         Stockfish 17o1 Hash 512 Threads 1 Nodes 8388608  [26, 578, 44] -9.7 Elo
Stockfish 17o1 Hash 512 Threads 8 MoveTime 0.25s vs. Stockfish 17o1 Hash 512 Threads 1 Nodes 1048576  [28, 541, 79] -27.4 Elo

That's nice but how can it be related to SF 1.91? To put these in perspective I've plotted these points against the curves of SF 17.1 and SF 1.91. And for good measure five intervening Stockfish families are included.

https://imgur.com/a/EZPnuYE (I seem not to have luck with image embedding using the img tag, so I've included an imgur url.)

The top horizontal line marks the estimated strength of SF 17.1 in your first match. Correspondingly, the lower line for your second match.

What jumps out at a glance is that there is no way you were going to have an even match against SF 1.91. The time odds needed for a balanced pairing are too vast to be practical. That's not to say you could not get a draw from the standard opening position, which you did eventually get with the correspondence game. But if tested on a diverse distribution of positions matches 1 and 2 are no contest.

Yes, I agree for a draw and my point was only that more time help old stockfish.

With black I expect old stockfish to lose because it seems not to understand the french defence and may choose the french defence as black. It may be mopre interesting if new stockfish get 1/4 second per move against some hours per move of old stockfish because in that case maybe new stockfish is not going to be able to convert the advantage it get as happened in my last fixed depth game

[Uri Blass]

for the record here is the relevant game that I posted in another thread.


[pgn][Event "Computer event"]
[Site "Somewhere on Earth"]
[Date "2025.12.02"]
[Round "1"]
[White "Stockfish dev-20251122-d9fd5165"]
[Black "Stockfish 1.9.1 JA 64bit"]
[Result "1/2-1/2"]
[TimeControl "depth: 26;depth: 12"]
[Time "04:11:26"]
[Board "2"]
[Termination "repetition"]
[ECO "C02"]
[Opening "French"]

1. e4 {+0.34/12 146 62529} e6 {+0.08/28 711380 1499330748} 2. d4 {+0.52/12 106 6977} d5 {+0.04/28 377595 801477473}
3. e5 {+0.40/12 224 32498} c5 {-0.20/28 904816 1913123496} 4. c3 {+0.26/12 302 52045} Nc6 {-0.28/28 410844 848374873}
5. Nf3 {+0.35/12 71 11774; C02: French, advance, Paulsen attack} Qb6 {-0.24/28 789184 1631666001} 6. Be2 {+0.31/12 154 31451} cxd4 {-0.20/28 323356 687142234}
7. cxd4 {+0.27/12 48 9371} Nge7 {-0.28/28 301830 642723626} 8. Na3 {+0.38/12 114 24388} Nf5 {-0.24/28 290500 610048676}
9. Nc2 {+0.31/12 217 42483} Bb4+ {-0.08/28 458599 993927690} 10. Kf1 {+0.82/12 168 27987} Bf8 {-0.08/28 1836608 3756327212}
11. b4 {+1.01/12 347 50926} Bd7 {-0.24/28 1338889 2741953380} 12. g4 {+1.14/12 192 32570} Nfe7 {+0.00/28 397904 821529505}
13. a4 {+1.11/12 154 23032} h5 {+0.00/28 549567 1124535506} 14. gxh5 {+1.14/12 66 8082} Rxh5 {-0.20/28 652394 1328708541}
15. h4 {+1.08/12 97 13120} Rc8 {-0.20/28 2143445 4421076264} 16. Bd2 {+1.10/12 535 21913} Nf5 {-0.32/28 421926 898011768}
17. a5 {+1.23/12 276 9382} Qc7 {-0.36/28 1338586 2853048616} 18. b5 {+1.20/12 471 20251} Nce7 {-0.16/28 735753 1645259502}
19. Nce1 {+1.21/12 350 20563} g6 {-0.20/28 1312844 2710700966} 20. Rc1 {+1.26/12 690 31654} Qd8 {-0.16/28 302086 667457808}
21. Rxc8 {+1.10/12 153 7963} Qxc8 {-0.20/28 350606 770671475} 22. Ng2 {+1.11/12 140 8065} Rh8 {+0.00/28 447706 980476689}
23. Nf4 {+1.10/12 2626 35919} Bh6 {+0.00/28 302481 667593741} 24. Kg2 {+1.15/12 175 15906} Qc7 {+0.00/28 132124 293793274}
25. Qb1 {+1.47/12 206 18983} Nc8 {+0.00/28 356134 799334377} 26. Bd3 {+1.66/12 165 13635} Nce7 {+0.00/28 184314 419944109}
27. Qb4 {+1.61/12 246 33391} Qd8 {+0.00/28 790631 1766693815} 28. Qc5 {+1.70/12 86 11112} b6 {+0.00/28 169261 386598036}
29. axb6 {+1.51/12 146 21659} axb6 {+0.08/28 269978 610107456} 30. Qa3 {+1.46/12 182 25696} Qb8 {+0.20/28 957425 2180951052}
31. Qb4 {+1.47/12 358 56176} Qa8 {+0.04/28 202373 467296550} 32. Qb2 {+1.53/12 349 34342} Kf8 {+0.28/28 1762961 4000351044}
33. h5 {+1.56/12 151 10514} Rg8 {+0.56/28 792663 1841974528} 34. Ra1 {+1.61/12 121 18000} Qe8 {+1.01/28 1555720 3649651613}
35. Ra7 {+1.98/12 90 10483} Kg7 {+1.69/28 3339920 7689363212} 36. hxg6 {+1.99/12 1612 30526} Kh8 {+2.02/28 1897505 4554753781}
37. Nh5 {+2.22/12 359 4582} Rxg6+ {+1.69/28 717838 1790002060} 38. Kf1 {+1.94/12 1422 8341} Ng8 {+1.81/28 194546 494811869}
39. Bxh6 {+2.09/12 2098 17156} Rxh6 {+1.57/28 656545 1668620817} 40. Nf4 {+1.81/12 2713 24775} Nge7 {+0.68/28 836507 2128013875}
41. Ke2 {+1.21/12 503 41858} Rh1 {+0.92/28 993316 2484373507} 42. Rc7 {+1.27/12 575 25759} Kg7 {+0.28/28 170549 436964799}
43. Rb7 {+1.23/12 542 59358} Kh8 {+0.72/28 386740 1003568921} 44. Rc7 {+0.94/12 492 47716} Kg7 {+0.00/28 14636 38090117}
45. Qb4 {+1.17/12 173 25769} Qd8 {+0.28/28 334393 808363363} 46. Qc3 {+1.08/12 519 19297} Qe8 {+0.36/28 362485 860542718}
47. Qb2 {+1.00/12 49 5078} Kg8 {+0.00/28 635236 1508965618} 48. Qb4 {+1.00/12 234 5948} Kg7 {+0.28/28 1004408 2393359902}
49. Qb2 {+0.77/12 526 45523} Kg8 {+0.00/28 13105 32901313} 50. Ra7 {+0.74/12 280 46610} Kg7 {+0.00/28 43567 105705903}
51. Qb4 {+0.86/12 106 18234} Qc8 {+0.00/28 29747 69964927} 52. Qb2 {+0.78/12 337 17451} Qe8 {+0.00/28 36999 92220044}
53. Rb7 {+0.81/12 86 7967} Kh8 {+0.00/28 17263 41772049} 54. Rxb6 {+0.82/12 13 1867} Qg8 {+0.28/28 353070 929403990}
55. Qa3 {+0.89/12 104 8242} Qg4 {+0.28/28 224730 610551429} 56. Bxf5 {+0.88/12 98 9218} Qxf5 {+0.28/28 125540 376405278}
57. Nd2 {+0.51/12 391 36861} Qxf4 {+0.36/28 126696 396946472} 58. Qxe7 {+0.55/12 364 42748} Qg4+ {+0.36/28 80287 250232366}
59. Kd3 {+0.57/12 324 32467} Rh3+ {+0.36/28 93729 306902131} 60. f3 {+0.50/12 143 9851} Rxf3+ {+0.00/28 49605 163558712}
61. Kc2 {+0.49/12 117 8268} Rf2 {+0.00/28 142400 421991803} 62. Kc3 {+0.54/12 26 2228} Kh7 {+0.00/28 64400 203459809}
63. Rb7 {+0.02/12 988 77318} Kg6 {+0.00/28 126188 419708573} 64. Rxd7 {+0.03/12 101 18375} Qd1 {+0.00/28 382142 1119265119}
65. Kb4 {+0.03/12 39 4679} Qxd2+ {+0.00/28 151287 470916386} 66. Kc5 {+0.08/12 61 9367} Qa5 {+0.00/28 476591 1115243362}
67. Rb7 {+0.07/12 418 12312} Qc3+ {+0.00/28 1604572 4038552287} 68. Kd6 {+0.11/12 421 17459} Qxd4 {+0.00/28 193483 534453679}
69. Qd8 {+0.30/12 1051 78284} Qb4+ {+0.00/28 324117 921895913} 70. Kd7 {+0.13/12 467 55852} Qc5 {+0.00/28 572176 1636797254}
71. Qg8+ {+0.11/12 95 13443} Kf5 {+0.00/28 1369136 4024407351} 72. Qxf7+ {+0.00/12 115 13369} Kxe5 {+0.00/28 530756 1630682835}
73. Qh5+ {+0.00/12 62 6512} Kd4 {+0.00/28 1536349 4718354306} 74. b6 {+0.00/12 90 11086} Rf6 {+0.00/28 956321 2971292069}
75. Rb8 {+0.09/12 345 40175} e5 {+0.00/28 613978 1983461663} 76. Qd1+ {+0.00/12 153 20188} Kc4 {+0.00/28 189887 629842040}
77. Qc2+ {+0.00/12 26 3445} Kb4 {+0.00/28 192755 634420839} 78. Qb2+ {+0.01/12 108 10818} Kc4 {+0.00/28 8664 29210932}
79. Qc2+ {+0.01/12 10 1686} Kb4 {+0.00/28 228 547446} 80. Qxc5+ {+0.01/12 73 8201} Kxc5 {+0.00/28 1011 3510370}
81. b7 {+0.01/12 557 21909} Kb6 {+0.00/28 867 1969189} 82. Ke7 {+0.11/12 256 31877} Rh6 {+0.00/28 1845 6190337}
83. Rd8 {+0.12/12 22 5950} Kxb7 {+0.00/28 261 832742} 84. Rxd5 {+0.00/12 129 25154} e4 {+0.00/28 246 562462}
85. Rb5+ {+0.00/12 115 10979} Kc6 {+0.00/28 712 1923030} 86. Re5 {+0.00/12 14 4048} Rh4 {+0.00/28 95 283867}
87. Ke6 {+0.00/12 14 4429} Rf4 {+0.00/28 207 513072} 88. Ke7 {+0.00/12 13 2948} Rg4 {+0.00/28 300 1041170}
89. Ke6 {+0.00/12 32 6804} Rg6+ {+0.00/28 112 349845} 90. Kf5 {+0.01/12 48 8860} Rg1 {+0.00/28 151 577551}
91. Rxe4 {+0.01/12 146 33172} Ra1 {+0.00/28 111 464641} 92. Ke6 {+0.00/12 51 12781} Rb1 {+0.00/28 111 467836}
93. Re5 {-0.01/12 137 40527} Ra1 {+0.00/28 53 184131} 94. Rh5 {+0.00/12 58 11836} Rb1 {+0.00/28 175 891769}
95. Rh2 {-0.01/12 104 25586} Ra1 {+0.00/28 95 509407} 96. Rh8 {+0.00/12 81 28433} Rb1 {+0.00/28 76 435511}
97. Rc8+ {+0.00/12 33 9971} Kb7 {+0.00/28 89 479991} 98. Rc5 {+0.00/12 66 18533} Ra1 {+0.00/28 169 1039547}
99. Rb5+ {-0.03/12 87 27778} Ka6 {+0.00/28 107 497611} 100. Rb2 {-0.02/12 14 4820} Rc1 {+0.00/28 43 231897}
101. Ra2+ {+0.00/12 46 12533} Kb5 {+0.00/28 96 562884} 102. Ra8 {+0.00/12 43 10995} Rd1 {+0.00/28 70 412440}
103. Rb8+ {+0.00/12 25 7001} Ka4 {+0.00/28 78 465466} 104. Rg8 {+0.00/12 44 13603} Rb1 {+0.00/28 191 1126736}
105. Kd6 {+0.04/12 65 22405} Rc1 {+0.00/28 76 448749} 106. Ke5 {+0.27/12 57 16683} Rb1 {+0.00/28 77 363107}
107. Kd4 {+0.01/12 78 36533} Rc1 {+0.00/28 148 749063} 108. Kd3 {+0.02/12 81 26840} Rb1 {+0.00/28 346 1891701}
109. Ra8+ {+0.00/12 61 29029} Kb3 {+0.00/28 147 784629} 110. Rb8+ {+0.00/12 10 4380} Ka2 {+0.00/28 15 39629}
111. Ra8+ {+0.00/12 10 1191} Kb2 {+0.00/28 38 172437} 112. Rb8+ {+0.00/12 10 1917} Ka1 {+0.00/28 12 56893}
113. Ra8+ {+0.00/12 20 7717} Kb2 {+0.00/28 28 28} 114. Kd2 {+0.01/12 12 4428} Ra1 {+0.00/28 41 171726}
115. Rb8+ {+0.00/12 85 20970} Ka3 {+0.00/28 102 554289} 116. Ra8+ {+0.00/12 10 2384} Kb2 {+0.00/28 10 3605}
117. Rb8+ {+0.00/12 10 1958} Ka3 {+0.00/28 10 979} 118. Ra8+ {+0.00/12 10 1173} Kb2 {+0.00/28 10 523}
1/2-1/2

[/pgn]

[jkominek]

For match 3, SF 17.1 was left at 0.25s / move, while SF 1.91 was increased to 120s / move for a 480x time odds. After making some measurements on my testing machine I get an estimate of about 2G nodes / move on average. Then for match 4, the correspondence game, Uri set a target of 100 G nodes per move for SF 1.91.

I don't have direct measurements at those large node budgets. (Fixed nodes per move games are run single threaded.) So that leaves no choice but to go out on a ledge and attempt extrapolation. Here's what I get as a plot. https://imgur.com/RlnZb6L

Running horizontal lines from the SF 1.91 curve to the SF 17.1 curve it intersects at:

• Match 3: equal competition is SF 17.1 set at 55,000 nodes / move, node ratio ~ 38,900.
  Match 4: equal competition is SF 17.1 set at 173,000 nodes / move, node ratio ~ 577,000.

I don't know what time control those values correspond to exactly. It's around a 1/10th time allotment of your original settings, amazingly.

Myself I find these Stockfish family technology curves handy for anticipating what to expect when old engines face off against new. And, having gone through this exercise I'm quite curious as to how the soon-to-be-released Stockfish 18 will stack up.

[jkominek]

By accident I've discovered that images display in the board if you leave the url outside of a img or url tag. Go figure.

Reposing second plot.