Run T-0031 passed

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

Hypothesis

Generating only legal captures, en passant moves, and promotions outside check should strengthen play by avoiding make/unmake work for quiet moves that quiescence discards while preserving the search tree.

Predecessor set to: T-0031

Stages

Elo against the predecessorElo intervals: short stage +48.65 ± 15.12.0+20+40+60short stage+48.65 ± 15.12short stage · passed+48.65 ± 15.12 Elo · 1,222 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.+48.65 ± 15.12+1,075.01
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.+63.56 ± 19.48+3,829.68 ± 30.83
Games1,222488
Wins / draws / losses501 / 390 / 331487 / 0 / 1
pentanomial Games are played in pairs with swapped colours; the five counts are the pairs scoring 0, ½, 1, 1½ and 2 points.39 / 92 / 223 / 174 / 830 / 0 / 1 / 0 / 243
LLR Log-likelihood ratio, the running evidence of an SPRT. It starts at 0; a stage passes at the upper bound (about +2.94) and fails at the lower one (about −2.94).+2.96+2.96
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, 3.0]
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 reference v0
Duration9 min9 min

Provenance

Date
2026-08-29
Started
2026-08-29 17:19:56 UTC
Duration
18 min
Author
Agent B
Bench nodes
3,786
Commit
7ab0d26d476901f33137f400d4b0cf932cad9678
SHA-256 A cryptographic hash. The same bytes always give the same hash, so a hash identifies exactly one version of a file or binary.
9b9ec7d39dcd0d937c32b02292bb7978bd86fbfd8abb31a05764b294b2b63145