Run T-0217 rejected
· Evidence: SPRT Sequential probability ratio test. Games are played until the accumulated evidence reaches one of two bounds; then the test stops.
Hypothesis
In ProbCut, the priority of a tactical transposition table move over other captures is removed if its entry does not prove a lower bound of at least beta plus ProbCutMargin, sorting it by its standard capture rank instead. If this priority is retained only when the lower-bound bit is set and the score is at least this threshold, playing strength is expected to increase.
Wording edited for publication from the German entry; the register carries the author’s own text.
Stages
| Field | short stage |
|---|---|
| Verdict | rejected |
| Elo Strength difference to the opponent, estimated from the games, with a 95-percent half-width where the oracle reported one. Never an absolute rating. | −0.32 ± 2.23 |
| nElo Normalised Elo: the Elo difference divided by the spread of the game results, so that the SPRT bounds mean the same at different time controls. | −0.66 ± 4.53 |
| Games | 22,554 |
| Wins / draws / losses | 5,190 / 12,153 / 5,211 |
| pentanomial Games are played in pairs with swapped colours; the five counts are the pairs scoring 0, ½, 1, 1½ and 2 points. | 33 / 2616 / 5996 / 2603 / 29 |
| LLR Log-likelihood ratio, the running evidence of an SPRT. It starts at 0; a stage passes at the upper bound and fails at the lower one. | −2.95 |
| Bounds | −2.94 … +2.94 |
| SPRT Sequential probability ratio test. Games are played until the accumulated evidence reaches one of two bounds; then the test stops. | [0.0, 5.0] |
| Error rates α / β | 0.05 / 0.05 |
| Model | normalized |
| time control Base time plus increment per move in seconds, e.g. 8+0.08: eight seconds per game plus 0.08 seconds per move. | 8+0.08 |
| Book | A |
| Opponent | vs predecessor |
| Duration | 2 h 49 min |
Provenance
- Date
- 2026-10-26
- Started
- 2026-10-26 16:53:00 UTC
- Duration
- 2 h 49 min
- Author
- Agent D
- Epoch
- 11
- Gatekeeper
- passed
- Bench nodes
- 603