A sub-4096-byte chess engine — a real modern search (PVS, null-move, LMR, qsearch, transposition table) shipped in ≤4096 bytes of Python. Now lives in its own repository:
→ https://github.com/chrisaacson69/pygone (private)
Extracted from this vault on 2026-06-05 (it had been developed here untracked). The
engine, the pyshrink/shrink minifiers, the match/tactics/watch harness, the vendored
sunfish opponent, and the teardown / floor-vs-ceiling write-ups all moved with it.
Vault thesis this project is a specimen of: Repairing LLM Code — The Two Oracles — pygone is the inverse case (readable Python → 4 KB blob), the floor-vs-ceiling complement to the decompiler’s bytecode→readable-C direction. (Re-wired 2026-06-08: the 2026-06-05 repo extraction had severed this link — the seam-breaker the method page warns about.)