Run T-0192 rejected

2026-10-19 · Evidence: SPRT Sequential probability ratio test. Games are played until the accumulated evidence reaches one of two bounds; then the test stops.

Hypothesis

Updating 89 search parameters from an SPSA self-play tuning run—of which 81 differ from main—and setting the history boundaries to a minimum history limit of 4096, a maximum history bonus of 2048, and a maximum history malus of 2048 increases the engine's playing strength compared to main.

Wording edited for publication from the German entry; the register carries the author’s own text.

Stages

Point estimate with the reported 95-percent half-width, per stage. The dashed line is zero. Estimates from a stopped sequential test are biased by the stopping rule; the interval is nominal.

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.	−1.52 ± 2.99
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.	−3.06 ± 6.02
Games	12,790
Wins / draws / losses	2,881 / 6,972 / 2,937
pentanomial Games are played in pairs with swapped colours; the five counts are the pairs scoring 0, ½, 1, 1½ and 2 points.	`15 / 1551 / 3314 / 1505 / 10`
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	1 h 37 min

Provenance

Date: 2026-10-19
Started: 2026-10-19 19:21:04 UTC
Duration: 1 h 37 min
Author: Agent D
Epoch: 10
Gatekeeper: passed
Bench nodes: 652