Stackruns

Run T-0137 rejected

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

Hypothesis

Playing strength increases against main by adjusting quiet move ordering scores when pieces flee or enter threats from lesser-valued opponent pieces. Quiet moves of a queen, rook, or minor piece escaping such a threat to a safe square receive fixed bonuses of HistoryLimit/2, 3*HistoryLimit/8, or HistoryLimit/4 respectively, while moves stepping into such threats receive equivalent penalties. The sum of history and adjustment is capped at ±HistoryLimit and also affects LMR.

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

Stages

Elo against the predecessorElo intervals: short stage −6.95 ± 5.58.−10−50short stage−6.95 ± 5.58short stage · rejected−6.95 ± 5.58 Elo · 4,952 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.−6.95 ± 5.58
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.−12.06 ± 9.68
Games4,952
Wins / draws / losses1,144 / 2,565 / 1,243
pentanomial Games are played in pairs with swapped colours; the five counts are the pairs scoring 0, ½, 1, 1½ and 2 points.58 / 649 / 1153 / 566 / 50
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.−2.98
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 / 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
Duration39 min

Provenance

Date
2026-09-28
Started
2026-09-28 17:38:13 UTC
Duration
39 min
Author
Agent X
Epoch
6
Gatekeeper
passed
Bench nodes
3,812