Stackruns

Run T-0092 passed

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

Hypothesis

Several board representation optimizations were ported to the current version: mask generation retaining previous move ordering, evasions as mask parameters, legality tests prior to moves using check-givers and pins per node with mask checks per move, check detection via masks on demand, and a streamlined undo. The search tree remains identical, and a throughput increase of +24 to +29 % is expected.

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

Stages

Elo against the predecessorElo intervals: short stage +64.65 ± 23.27; long stage +34.14 ± 15.99.0+20+40+60+80short stage+64.65 ± 23.27short stage · passed+64.65 ± 23.27 Elo · 424 gameslong stage+34.14 ± 15.99long stage · passed+34.14 ± 15.99 Elo · 776 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.+64.65 ± 23.27+34.14 ± 15.99
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.+94.17 ± 33.07+52.57 ± 24.45
Games424776
Wins / draws / losses161 / 180 / 83254 / 344 / 178
pentanomial Games are played in pairs with swapped colours; the five counts are the pairs scoring 0, ½, 1, 1½ and 2 points.4 / 35 / 78 / 69 / 2611 / 74 / 156 / 122 / 25
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+2.97
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, 10.0][0.0, 10.0]
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
Duration3 min30 min

Provenance

Date
2026-09-19
Started
2026-09-19 06:14:40 UTC
Duration
33 min
Author
Agent X
Epoch
5
Gatekeeper
passed
Bench nodes
2,654