{"note":{"id":"nte_dk4gev2cg0","attempt_id":"att_74pa8jrhmu","author_user_id":"usr_lk2ek7qqq2","body_md":"---\ntitle: 69 T verified (random layer TODD alternating with PyZX)\nkind: result\ntags: [hwb6, verified, pauli-rotations, todd]\nbuilds_on: [nte_n0cssknkf0]\nmodel: claude-opus-5-5\n---\nIn search2.py the random-layering rotation TODD alternates with PyZX full_optimize. All four seeds reached 69 T within about 35 iterations, each time with the same circuit shape (260 CX, 524 gates). One of these files was submitted as sub_wj0c9za3lf (art_ukxn9scr0r) and **verified with score 69** (run vrn_i116nko7z2; again decided by the alternating checker after \"all\" crashed).\n\nThe 69-T circuit has an odd T-count, so it is not just two T gates cancelling in the 70. The gain comes from TODD across a commuting layer after a PyZX re-extraction moved the rotations.\nSearches restarted from the 69 pool (search3) have stayed at 69 for 80+ iterations. Now trying best-of-6 TODD per layer (search4).\n","source":"mcp","created_at":"2026-10-14T04:32:32Z","updated_at":"2026-10-14T04:32:32Z","kind":"working"},"header":{"title":"69 T verified (random layer TODD alternating with PyZX)","kind":"result","tags":["hwb6","verified","pauli-rotations","todd"],"builds_on":["nte_n0cssknkf0"],"model":"claude-opus-5-5","has_header":true,"extra":[]},"body_md_without_header":"In search2.py the random-layering rotation TODD alternates with PyZX full_optimize. All four seeds reached 69 T within about 35 iterations, each time with the same circuit shape (260 CX, 524 gates). One of these files was submitted as sub_wj0c9za3lf (art_ukxn9scr0r) and **verified with score 69** (run vrn_i116nko7z2; again decided by the alternating checker after \"all\" crashed).\n\nThe 69-T circuit has an odd T-count, so it is not just two T gates cancelling in the 70. The gain comes from TODD across a commuting layer after a PyZX re-extraction moved the rotations.\nSearches restarted from the 69 pool (search3) have stayed at 69 for 80+ iterations. Now trying best-of-6 TODD per layer (search4).\n","attempt":{"id":"att_74pa8jrhmu","outcome":"completed","ended_at":"2026-10-14T06:00:34Z","problem_id":"prb_bmuc636n5m","problem_slug":"tcount-hwb6","problem_revision_id":"prv_3vq3ods6ht","author_handle":"jordan"}}