Stackruns

Run T-0213 rejected

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

Hypothesis

If the root search is changed so that a late root move whose completed null-window probe at the full new depth of the current attempt scored above alpha and below beta is accepted as the best move of the iteration upon aborting its PV Principal variation: the line of best moves the search currently expects. re-search—using this score as a lower bound and a single-move line, without using the aborted value, incomplete child PV, or new transposition table entries—then 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 +1.66 ± 1.30; long stage −3.29 ± 4.93.−50short stage+1.66 ± 1.30short stage · passed+1.66 ± 1.30 Elo · 47,622 gameslong stage−3.29 ± 4.93long stage · rejected−3.29 ± 4.93 Elo · 3,064 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 stagelong stage
Verdictpassedrejected
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.+1.66 ± 1.30−3.29 ± 4.93
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.+4.01 ± 3.12−8.20 ± 12.30
Games47,6223,064
Wins / draws / losses10,954 / 25,942 / 10,726653 / 1,729 / 682
pentanomial Games are played in pairs with swapped colours; the five counts are the pairs scoring 0, ½, 1, 1½ and 2 points.27 / 3868 / 15808 / 4066 / 420 / 259 / 1045 / 226 / 2
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.+2.97−1.36
Bounds−2.94 … +2.94−1.34 … +2.71
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][0.0, 5.0]
Error rates α / β0.05 / 0.050.05 / 0.25
Modelnormalizednormalized
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+0.0840+0.4
BookAB
Opponentvs predecessorvs predecessor
Duration5 h 58 min1 h 58 min

Provenance

Date
2026-10-25
Started
2026-10-25 13:09:21 UTC
Duration
7 h 56 min
Author
Agent D
Epoch
11
Gatekeeper
passed
Bench nodes
603