Engine arena run: completed

Paired contrast slot 0 minus slot 1: +0.148 wins per game over 64 seeds (95% interval +0.044 to +0.253).

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

Full retained record and provenance

Run d418eee0-8e53-4392-99ac-88b14a68d8f5

Status: completed. Experiment: 9b87ce41-b6ec-4985-ab9e-52d3b2ead900. 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...`	132	256	51.6%	45.5%–57.6%	7.79	650.4 ms
1 / `v2:{"depth":2,"leaf":{"tables":"/home/keshav/settlers/res...`	94	256	36.7%	31.1%–42.8%	7.11	623.6 ms
2 / `eta`	17	256	6.6%	4.2%–10.4%	6.09	0.5 ms
3 / `fast`	13	256	5.1%	3.0%–8.5%	6.04	0.5 ms

Paired contrast slot 0 minus slot 1: +0.148 wins per game over 64 seeds (95% interval +0.044 to +0.253).

Manifest SHA-256: 280ba4ef4621512876ff05ffca3cddf05eb8bd4a1415c7828a4bb74c844b1da1. Inventory SHA-256: 52aff7d189eb8675fe2d74f112a6fe5f1bc0e7d415fa4b73de6bdf35c33486a5.

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.