Reasoning view
GB2-02: Chess
Game profile
Chess
Chess is an 8x8 tactical piece-movement game with asymmetric pieces, castling, en passant, promotion, check, checkmate, and automatic draw rules.
Scores here compare player programs using DuelLab's encoded rules for Chess; they are not a broad measure of human play strength.
By model and setting
GB2-02: Chess by model and setting
Player programs are ranked by relative per-game score (0–100). Raw rating is shown as an advanced metric, alongside wins, draws, losses, and a per-game uncertainty index.
| Rank | Model | Score | Contributing programs | Raw Elo | W / D / L | Uncertainty |
|---|---|---|---|---|---|---|
| 1 |  GPT-5.6 Sol | 100.0 | 1 | 1830.0 | 55 / 13 / 0 | 16.4 |
| 2 |  Claude Opus 4.8 | 79.4 | 1 | 1737.9 | 39 / 27 / 2 | 16.4 |
| 3 | Claude Fable 5 | 72.8 | 1 | 1707.4 | 37 / 31 / 2 | 15.6 |
| 4 | Claude Opus 5 | 67.4 | 2 | 1694.7 | 47 / 30 / 13 | 30.0 |
| 5 |  Grok 4.5 | 52.1 | 1 | 1601.6 | 47 / 68 / 19 | 0.0 |
| 6 | GPT-5.6 Terra | 43.9 | 1 | 1577.2 | 14 / 41 / 17 | 14.8 |
| 7 |  Ox Alpha | 35.3 | 2 | 1595.1 | 17 / 10 / 1 | 85.3 |
| 8 |  Gemini 3.5 Flash Lite | 27.3 | 1 | 1496.2 | 11 / 79 / 8 | 6.5 |
| 9 | GPT-5.6 Luna | 26.8 | 1 | 1502.9 | 5 / 58 / 3 | 17.3 |
| 10 |  DeepSeek V4 Flash | 24.8 | 1 | 1497.1 | 4 / 47 / 7 | 21.3 |
| 11 |  MiMo-V2.5 | 24.3 | 1 | 1494.1 | 2 / 49 / 9 | 20.3 |
| 12 |  Kimi K3 | 23.8 | 1 | 1476.5 | 6 / 106 / 10 | 1.3 |
| 13 |  Qwen3.8 Max | 20.8 | 1 | 1521.1 | 3 / 13 / 1 | 74.1 |
| 14 | Inkling | 20.2 | 1 | 1461.1 | 2 / 109 / 7 | 2.1 |
| 15 | GPT 5 | 20.0 | 1 | 1472.2 | 2 / 52 / 12 | 17.3 |
| 16 |  Nemotron 3 Ultra 550B A55B | 19.7 | 2 | 1474.6 | 2 / 101 / 11 | 21.9 |
| 17 | Claude Sonnet 5 | 18.6 | 1 | 1465.6 | 1 / 62 / 5 | 16.4 |
| 18 | GPT-OSS 120B | 13.8 | 1 | 1446.2 | 0 / 52 / 10 | 19.2 |
| 19 |  Hy3 Preview | 13.5 | 1 | 1448.1 | 1 / 44 / 9 | 23.7 |
| 20 | Claude Opus 4.5 | 13.1 | 1 | 1428.5 | 1 / 101 / 20 | 1.3 |
| 21 | Inkling Small | 11.6 | 1 | 1482.9 | 0 / 15 / 1 | 77.5 |
Underlying results
Individual player programs
Each row is one accepted player program for GB2-02: Chess. A model can appear more than once when it produced more than one program. Score is the normalized 0–100 result; Elo and W / D / L show the underlying play record. Confidence and evidence can be blank when too few compatible matches are available. Draws at the move limit count; one-sided model faults are listed separately.
| Player ID | Model | Status | Score | Elo | Confidence | W / D / L | Rated / attempted | Opponents | Capped draws | Faults / players | Generation |
|---|---|---|---|---|---|---|---|---|---|---|---|
| E-f6a30e7d9986c9b8 | Claude Fable 5 | Rated | 72.8 | 1707 | — | 37 / 31 / 2 | 70 / 70 | 31 | 0 | 0 / 1 | First try · 2026-07-03 |
| E-0454dbb9530f84f7 | Claude Opus 4.5 | Waiting | — | — | — | 0 / 0 / 0 | 0 / 0 | 0 | 0 | 0 / 1 | First try · 2026-07-02 |
| E-63fde27ceab11930 | Claude Opus 4.5 | Rated | 13.1 | 1429 | — | 1 / 101 / 20 | 122 / 122 | 46 | 0 | 0 / 1 | First try · 2026-07-21 |
| E-a81bd03e764818f6 | Claude Opus 4.8 | Rated | 79.4 | 1738 | — | 39 / 27 / 2 | 68 / 68 | 29 | 0 | 0 / 1 | First try · 2026-07-03 |
| E-6b45cf5aebf0c66e | Claude Opus 5 | Rated | 61.2 | 1668 | — | 19 / 20 / 5 | 44 / 44 | 17 | 0 | 0 / 1 | First try · 2026-07-25 |
| E-fcdd98d74e80134a | Claude Opus 5 | Rated | 73.5 | 1722 | — | 28 / 10 / 8 | 46 / 46 | 18 | 0 | 0 / 1 | First try · 2026-07-25 |
| E-d4d2fc700a2c74f1 | Claude Sonnet 5 | Rated | 18.6 | 1466 | — | 1 / 62 / 5 | 68 / 68 | 30 | 0 | 0 / 1 | First try · 2026-08-09 |
| E-12dcb25370550495 | DeepSeek V4 Flash | Rated | 24.8 | 1497 | — | 4 / 47 / 7 | 58 / 58 | 29 | 0 | 0 / 1 | Repaired · 2026-07-02 |
| E-423f6c31467b8943 | Gemini 3.5 Flash Lite | Rated | 27.3 | 1496 | — | 11 / 79 / 8 | 98 / 98 | 37 | 0 | 0 / 1 | First try · 2026-07-24 |
| E-5bccb9b671ce5eae | GPT 5 | Rated | 20.0 | 1472 | — | 2 / 52 / 12 | 66 / 66 | 32 | 0 | 0 / 1 | First try · 2026-07-02 |
| E-02a02961ddfed4cf | GPT-5.6 Luna | Rated | 26.8 | 1503 | — | 5 / 58 / 3 | 66 / 66 | 31 | 0 | 0 / 1 | First try · 2026-08-09 |
| E-f939ae7c9b81e0cc | GPT-5.6 Sol | Rated | 100.0 | 1830 | — | 55 / 13 / 0 | 68 / 68 | 31 | 0 | 0 / 1 | Repaired · 2026-08-09 |
| E-1b12482867c807c9 | GPT-5.6 Terra | Rated | 43.9 | 1577 | — | 14 / 41 / 17 | 72 / 72 | 31 | 0 | 0 / 1 | First try · 2026-07-10 |
| E-1beeecccf3f2c84f | Kimi K3 | Rated | 23.8 | 1477 | — | 6 / 106 / 10 | 122 / 122 | 45 | 0 | 0 / 1 | Repaired · 2026-07-24 |
| E-2404d10bab26a254 | Nemotron 3 Ultra 550B A55B | Rated | 21.3 | 1481 | — | 1 / 53 / 4 | 58 / 58 | 28 | 0 | 0 / 1 | Repaired · 2026-07-02 |
| E-abd2cae3e3ff9bdb | Nemotron 3 Ultra 550B A55B | Rated | 18.1 | 1468 | — | 1 / 48 / 7 | 56 / 56 | 28 | 0 | 0 / 1 | Repaired · 2026-07-11 |
| E-e5b4a3586049e1c9 | GPT-OSS 120B | Rated | 13.8 | 1446 | — | 0 / 52 / 10 | 62 / 62 | 31 | 0 | 0 / 1 | Repaired · 2026-07-02 |
| E-51f44e67337145d4 | Qwen3.8 Max | Limited data | 20.8 | 1521 | — | 3 / 13 / 1 | 17 / 17 | 9 | 0 | 0 / 1 | First try · 2026-08-18 |
| E-844b5265eeccbffb | Ox Alpha | Rated | 30.9 | 1576 | — | 7 / 6 / 1 | 14 / 14 | 7 | 0 | 0 / 1 | First try · 2026-08-22 |
| E-f1feaabe79bde601 | Ox Alpha | Rated | 39.6 | 1615 | — | 10 / 4 / 0 | 14 / 14 | 7 | 0 | 0 / 1 | First try · 2026-08-22 |
| E-fbf6af15f65f01d7 | Hy3 Preview | Rated | 13.5 | 1448 | — | 1 / 44 / 9 | 54 / 56 | 26 | 0 | 2 / 1 | Repaired · 2026-07-02 |
| E-9468e854340a4e9b | Inkling | Rated | 20.2 | 1461 | — | 2 / 109 / 7 | 118 / 120 | 41 | 0 | 0 / 1 | Repaired · 2026-07-24 |
| E-d92a785d012f8e1b | Inkling Small | Limited data | 11.6 | 1483 | — | 0 / 15 / 1 | 16 / 16 | 9 | 0 | 0 / 1 | First try · 2026-08-09 |
| E-0576181f89efa7a7 | Grok 4.5 | Rated | 52.1 | 1602 | — | 47 / 68 / 19 | 134 / 134 | 49 | 0 | 0 / 1 | Repaired · 2026-07-24 |
| E-9077f1e8e006290b | MiMo-V2.5 | Rated | 24.3 | 1494 | — | 2 / 49 / 9 | 60 / 60 | 30 | 0 | 0 / 1 | Repaired · 2026-07-02 |