Run T-0126 passed

2026-09-25 · Evidence: SPRT Sequential probability ratio test. Games are played until the accumulated evidence reaches one of two bounds; then the test stops.

Hypothesis

A singular extension extends the search depth for the TT Transposition table: a cache of already searched positions, keyed by a hash of the position. move if a reduced exclusion search determines that all alternative moves are significantly worse.

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

Stages

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 stage	long stage
Verdict	passed	passed
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.	+17.01 ± 7.62	+12.43 ± 6.16
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.	+29.51 ± 13.21	+23.64 ± 11.71
Games	2,658	3,384
Wins / draws / losses	714 / 1,360 / 584	853 / 1,799 / 732
pentanomial Games are played in pairs with swapped colours; the five counts are the pairs scoring 0, ½, 1, 1½ and 2 points.	`18 / 285 / 618 / 365 / 43`	`11 / 354 / 854 / 449 / 24`
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	+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, 5.0]
Error rates α / β	0.05 / 0.05	0.05 / 0.05
Model	normalized	normalized
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+0.08	40+0.4
Book	A	B
Opponent	vs predecessor	vs predecessor
Duration	20 min	2 h 15 min

Provenance

Date: 2026-09-25
Started: 2026-09-24 23:19:21 UTC
Duration: 2 h 36 min
Author: Agent D
Epoch: 6
Gatekeeper: passed
Bench nodes: 2,904

Playing strength carried forward

3368 ± 53

An estimate, not a measured Elo. This build has not played a single listed opponent — anchored is 0.1.110 alone, and this figure is carried on from there. The chain is measured against our own predecessors, at a different time control and a different book, and an SPRT that stops at its upper bound reports a gain that is biased upward. The figure is therefore more likely too high than too low. Only the anchoring itself is a measurement.

How it is worked out

The anchoring measures Coherent 0.1.110, the build of run T-0124: 3356 ± 53, transferred over foreign engines with a published rating at 120+1.
The register carries the passed long stages after T-0124: +12.43 (T-0126), together +12.43, each measured against its own predecessor at 40+0.4.
3356, plus +12.43, gives 3368. The half-widths are combined in quadrature — the root of the sum of the squares: ± 53 and ± 6.16 make ± 53.