Stackruns

Run T-0195 passed

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

Hypothesis

Replacing the check extension SEE Static exchange evaluation: an estimate of the material outcome of a capture sequence on one square, without searching. threshold with a SEE threshold of 0 for quiet checking moves when extension is 0, while leaving all other search components unchanged, is expected to increase engine 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 +2.84 ± 2.27; long stage +7.81 ± 4.58.0+5+10short stage+2.84 ± 2.27short stage · passed+2.84 ± 2.27 Elo · 22,048 gameslong stage+7.81 ± 4.58long stage · passed+7.81 ± 4.58 Elo · 5,294 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
Verdictpassedpassed
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.+2.84 ± 2.27+7.81 ± 4.58
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.+5.74 ± 4.59+15.96 ± 9.36
Games22,0485,294
Wins / draws / losses5,111 / 12,006 / 4,9311,268 / 2,877 / 1,149
pentanomial Games are played in pairs with swapped colours; the five counts are the pairs scoring 0, ½, 1, 1½ and 2 points.31 / 2480 / 5821 / 2662 / 302 / 568 / 1389 / 685 / 3
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+2.94
Bounds−2.94 … +2.94−2.94 … +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][0.0, 5.0]
Error rates α / β0.05 / 0.050.05 / 0.05
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
Duration2 h 47 min3 h 28 min

Provenance

Date
2026-10-20
Started
2026-10-20 08:16:54 UTC
Duration
6 h 15 min
Author
Agent X
Epoch
10
Gatekeeper
passed
Bench nodes
683