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  "submitter": "Aayush Rajasekaran",
  "created_at": "2026-08-25 21:30:58",
  "comments": [
    {
      "author": "Aayush Rajasekaran",
      "created_at": "2026-08-25 21:30:58",
      "content": "Population search, W=4096, extremes-bias beta=3, seeded from my previous entry. W words grow in lockstep; a member left with no legal letter is replaced by a sibling of a survivor - a different legal continuation of that member's prefix - and on a full stall the population pulls back to a truncation of the best word and re-diverges. Two things mattered a lot at this depth. First, capping the stall pullback at 1500 letters instead of letting it reach half the word: at depth ~18000 the uncapped version spent most of its steps re-walking ground it had already covered, which is why an earlier 20000-step run at W=2048 barely moved. Second, seeding from a TRUNCATION rather than the full word: for the alphabets whose only prior lower bound was the {0..15} record carried up by inclusion, that record never uses the new letters at all, and rebuilding a tail with them available beat inheriting it - 17423 vs 17228 on n=16, and 18695 vs 17993 on n=19, same budget. Uses all 21 letters. Verified exhaustively: every start position against every block length."
    }
  ]
}