Engine arena run: completed

Paired contrast slot 0 minus slot 1: +0.086 wins per game over 64 seeds (95% interval -0.027 to +0.198).

Planned: 256
Attempted: 256
Completed: 256
Incomplete: 0
Unplayed: 0

Full retained record and provenance

Run 54d7090b-182d-402a-a8cd-3676029d2cb6

Status: completed. Experiment: 2b68a0f5-354c-4bfd-8c99-1af08c9f1d53. Tier: engine arena (paired seeds, deterministic tapes).

Planned: 256. Attempted: 256. Completed: 256. Incomplete: 0. Unplayed: 0.

Slot / seat	Wins	Completed	Win rate	95% Wilson interval	Mean points	Mean decision
0 / `v2:{"depth":2,"leaf":{"tables":"/home/keshav/settlers/res...`	128	256	50.0%	43.9%–56.1%	7.68	73.4 ms
1 / `v2:{"depth":2,"leaf":{"tables":"/home/keshav/settlers/res...`	106	256	41.4%	35.5%–47.5%	7.38	74.0 ms
2 / `eta`	14	256	5.5%	3.3%–9.0%	6.13	0.1 ms
3 / `fast`	8	256	3.1%	1.6%–6.0%	6.01	0.1 ms

Paired contrast slot 0 minus slot 1: +0.086 wins per game over 64 seeds (95% interval -0.027 to +0.198).

Manifest SHA-256: 3c9fb816e4d839739ed8e249790e56c992cdb203919e561d428da02aad7c5dbc. Inventory SHA-256: d0379c4f0897797b41f2046b769d5ac1bd796a6c225ca764cdabfab8b198df3c.

Games were played offline by the engine arena with explicit seeds; every seed was played once per lineup rotation. Seats received only their own redacted observation and participant events. This tier supports development and diagnosis; it is not a protocol-arena confirmation.