Run T-0181 interrupted

Wall run: the full number of games was played without the SPRT reaching a verdict. Interrupted, no verdict; it counts neither as passed nor in the share of verdicts.

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

Hypothesis

If killer and countermove bonuses in quiet move ordering are skipped when the ordering history sum (history plus continuations, near-root and pawn history) falls below -3000, and the late move reduction deduction for killers is omitted when the move's history intersection falls below -3000, while leaving killer and countermove table updates and the rest of the search unchanged, the engine will play stronger on the clock.

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

Stages

Elo against the predecessorElo intervals: short stage +4.10 ± 3.03; long stage +1.27 ± 1.52.0+2+4+6+8short stage+4.10 ± 3.03short stage · passed+4.10 ± 3.03 Elo · 12,370 gameslong stage+1.27 ± 1.52long stage · interrupted+1.27 ± 1.52 Elo · 48,000 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
Verdictpassedinterrupted
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.+4.10 ± 3.03+1.27 ± 1.52
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.+8.28 ± 6.12+2.59 ± 3.11
Games12,37048,000
Wins / draws / losses2,837 / 6,842 / 2,69110,864 / 26,447 / 10,689
pentanomial Games are played in pairs with swapped colours; the five counts are the pairs scoring 0, ½, 1, 1½ and 2 points.21 / 1354 / 3298 / 1482 / 3027 / 5555 / 12655 / 5742 / 21
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+0.18
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
Duration1 h 36 min32 h 20 min

Provenance

Date
2026-10-12
Started
2026-10-12 09:48:40 UTC
Duration
33 h 57 min
Author
Agent X
Epoch
10
Reason
wall run (full number of games, no verdict)
Gatekeeper
passed
Bench nodes
631