Stackruns

Run T-0029 passed

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

Hypothesis

Search strength should improve because deeper or clearly favorable nodes use larger null-move reductions while high-depth verification rejects unsafe cutoffs in zugzwang-prone positions.

Predecessor set to: T-0029

Stages

Elo against the predecessorElo intervals: short stage +5.75 ± 4.38.0+5+10short stage+5.75 ± 4.38short stage · passed+5.75 ± 4.38 Elo · 14,756 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.+5.75 ± 4.38+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.+7.35 ± 5.61+3,829.68 ± 30.83
Games14,756488
Wins / draws / losses5,304 / 4,392 / 5,060487 / 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.720 / 1451 / 2849 / 1581 / 7770 / 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
Duration1 h 44 min9 min

Provenance

Date
2026-08-29
Started
2026-08-29 14:02:45 UTC
Duration
1 h 54 min
Author
Agent B
Bench nodes
3,786
Commit
fd03446ddaf920e45b61088c924588341ca5f92f
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.
e88dc2def08bd1407574a3fe04080f3db1be2ce27106bef975398239eaf4a2ba