Stackruns

Run T-0081 passed

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

Hypothesis

Late move reduction (LMR) is increased by one additional step for moves with negative history. This acts in the opposite direction of the history-based reduction protection and is applied only after the conclusion of SPSA tuning.

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

Stages

Elo against the predecessorElo intervals: short stage +23.00 ± 9.94; long stage +15.35 ± 7.87.0+10+20+30short stage+23.00 ± 9.94short stage · passed+23.00 ± 9.94 Elo · 2,420 gameslong stage+15.35 ± 7.87long stage · passed+15.35 ± 7.87 Elo · 3,670 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.+23.00 ± 9.94+15.35 ± 7.87
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.+32.13 ± 13.84+21.96 ± 11.24
Games2,4203,670
Wins / draws / losses792 / 996 / 6321,127 / 1,578 / 965
pentanomial Games are played in pairs with swapped colours; the five counts are the pairs scoring 0, ½, 1, 1½ and 2 points.63 / 248 / 477 / 310 / 11295 / 403 / 715 / 489 / 133
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.+2.95+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
Duration18 min2 h 18 min

Provenance

Date
2026-09-14
Started
2026-09-14 17:20:03 UTC
Duration
2 h 36 min
Author
Agent D
Epoch
4
Gatekeeper
passed
Bench nodes
3,242