Run T-0229 rejected

· Evidence: SPRT Sequential probability ratio test. Games are played until the accumulated evidence reaches one of two bounds or the game limit fixed in advance; then the test stops.

Hypothesis

Applying the quiet-move score-change bonus also to the pawn history table indexed by the previous pawn structure, piece, and target square—provided that pawn history weight or pawn history search is non-zero, while keeping tables, weights, bounds, and readers unchanged—increases playing strength.

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

Stages

Elo against the predecessorElo intervals: short stage −0.88 ± 2.60.−4−20+2short stage−0.88 ± 2.60short stage · rejected−0.88 ± 2.60 Elo · 16,576 games
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
Verdictrejected
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.−0.88 ± 2.60
nElo Normalised Elo: relates the mean score excess of a colour-swapped pair to the spread of the pair results.−1.79 ± 5.29
Games16,576
Wins / draws / losses3,778 / 8,978 / 3,820
pentanomial Games are played in pairs with swapped colours; the five counts are the pairs scoring 0, ½, 1, 1½ and 2 points.23 / 1932 / 4424 / 1882 / 27
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.−2.94
Bounds−2.94 … +2.94
SPRT Sequential probability ratio test. Games are played until the accumulated evidence reaches one of two bounds or the game limit fixed in advance; then the test stops.[0.0, 5.0]
Error rates α / β0.05 / 0.05
Modelnormalized
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
BookA
Opponentvs predecessor
Duration2 h 04 min

Provenance

Date
2026-10-31
Started
2026-10-31 14:08:18 UTC
Duration
2 h 05 min
Author
Agent X
Epoch
12
Gatekeeper
passed
Bench nodes
603