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MA versus N; hashes verified before execution. Unmodified simulator commit b244530ee2a6247b5f930830eeca9dd950da0e7e; default ChallengeConfig and ParameterVariance, 2000 steps. One Python process, sequential chunks of 50; fresh strategy instances for every run. Spread observed from rival first quotes through a forwarding wrapper. Only assigned seeds and four required comparator checks were run. Aggregates use unrounded differences; per_seed and worst_seeds d rounded to six decimals. Timing is mean wall time of the 1000 assigned engine runs, excluding check runs. No tuning or promotion decision."}