Run T-0171 passed

2026-10-09 · Evidence: SPRT Sequential probability ratio test. Games are played until the accumulated evidence reaches one of two bounds; then the test stops.

Hypothesis

Clamping correction-history updates for informative fail-soft results to the search window—beta for lower bounds and initial alpha for upper bounds, only when still informative over static eval—while keeping exact updates, TT Transposition table: a cache of already searched positions, keyed by a hash of the position. bounds, and search returns unchanged, increases playing strength at fixed nodes against the baseline.

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.	+3.81 ± 2.90	+12.37 ± 6.05
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.	+7.39 ± 5.64	+24.42 ± 11.93
Games	14,600	3,260
Wins / draws / losses	3,551 / 7,658 / 3,391	880 / 1,616 / 764
pentanomial Games are played in pairs with swapped colours; the five counts are the pairs scoring 0, ½, 1, 1½ and 2 points.	`30 / 1724 / 3646 / 1856 / 44`	`3 / 346 / 822 / 450 / 9`
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	+2.95
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	1 h 50 min	2 h 10 min

Provenance

Date: 2026-10-09
Started: 2026-10-09 13:44:19 UTC
Duration: 4 h 01 min
Author: Agent D
Epoch: 7
Gatekeeper: passed
Bench nodes: 732

Playing strength: AFE

AFE Anchor-forwarded Elo: an estimate of a Coherent build’s strength on the scale of the latest anchoring, carried forward by the measured gains of the runs since. An estimate, not a measurement. Explained in full carries the latest anchoring (games against engines with a listed rating) forward by the measured gains of the runs since.

Measured: long stage against the predecessor +12.37 ± 6.05 Elo (SPRT-stopped: the test ended as soon as it reached its bound).

AFE 3637 [3620; 3654] nominal 90 % model interval

An estimate, not a measurement. Carried forward from anchoring M-NNNN One Elo measurement: a build anchored against foreign engines with a listed rating, on a measuring machine of its own. Numbered in the order delivered; the register run it measured is named with it. The series continues the entries E-0001 to E-0012 and starts at M-0013. (Coherent 0.2.6, T-0162); frozen on 2026-10-09. How AFE is calculated · Playing strength