Stackruns

Run T-0242 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

If move selection in search retrieves castling moves from the remaining unsearched quiet moves after late good captures and before bad captures following the LMP phase, and exempts castling from the quiet pruning jump while leaving futility, history pruning, SEE Static exchange evaluation: an estimate of the material outcome of a capture sequence on one square, without searching., reductions, all other quiet moves, move ordering in ProbCut and quiescence search, and all thresholds unchanged, the engine plays stronger.

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

Stages

Elo against the predecessorElo intervals: short stage −2.60 ± 3.47.−6−4−20short stage−2.60 ± 3.47short stage · rejected−2.60 ± 3.47 Elo · 9,086 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.−2.60 ± 3.47
nElo Normalised Elo: relates the mean score excess of a colour-swapped pair to the spread of the pair results.−5.36 ± 7.14
Games9,086
Wins / draws / losses2,055 / 4,908 / 2,123
pentanomial Games are played in pairs with swapped colours; the five counts are the pairs scoring 0, ½, 1, 1½ and 2 points.9 / 1068 / 2457 / 1000 / 9
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.−2.96
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
Duration1 h 08 min

Provenance

Date
2026-11-08
Started
2026-11-08 03:13:43 UTC
Duration
1 h 08 min
Author
Agent X
Epoch
15
Gatekeeper
passed
Bench nodes
603