Classical Rating List (Original UCI)

IJCCRL • Classical 30m+2s • 2026

I SE CUP CLASSICAL IJCCRL 2026 — Final

Audited fixed mirrored opening final between Stockfish 18 and Obsidian dev-16.15. The published final pack passed audit under IJCCRL material criteria: complete PGN with final results, deterministic pairing integrity verified under the duel format actually used, no duplicate games detected, exact side balance confirmed at 12 White and 12 Black per engine, and termination plus tablebase evidence recorded in the published material. The final is complete and the champion is confirmed.

AUDIT PASS Time control: 30m + 2s 24 games 12 mirrored opening sets 12W / 12B each Winner: Stockfish 18

Audit summary

FormatFixed duel
Structure12 mirrored sets
Side balance12W / 12B each
Publication packPGN + results + scheduler

Verified controls

  • PASSComplete PGN with final results for all 24 published games.
  • PASSDeterministic pairing integrity verified under the fixed mirrored opening criterion actually used: each opening set closes as a two-game mirror with colour swap.
  • PASSNo duplicate games detected under D1/D2 fingerprint control.
  • PASSExact duel side balance verified: 12 White and 12 Black games for each engine.
  • PASSTermination and tablebase evidence recorded in the published event material.
  • NoteRound-robin colour-balance control is not applicable here because the event format is a fixed mirrored opening final.

Final result

The final paired Stockfish 18 against Obsidian dev-16.15 in a completed 24-game fixed mirrored opening match. The audited final is closed and the tournament winner is confirmed.

W
Stockfish 18
Match score: 13 / 24
Record: 12-2-10
Side balance: 12 White / 12 Black
Status: Final winner • Champion
L
Obsidian dev-16.15
Match score: 11 / 24
Record: 10-2-12
Side balance: 12 White / 12 Black
Status: Runner-up
Pos Engine Score Games W-D-L Balance Status / Notes
1 Stockfish 18 13/24 24 12-2-10 12W / 12B Champion Wins the final and the I SE CUP CLASSICAL IJCCRL 2026 title.
2 Obsidian dev-16.15 11/24 24 10-2-12 12W / 12B Runner-up Final complete and valid under the audited fixed mirrored criterion.
This block is ready to publish as the final audit note for the I SE CUP CLASSICAL IJCCRL 2026. The audited match finished at 24/24 published games, with 12 mirrored opening sets and exact side balance preserved for both engines.

Under IJCCRL duel criteria, pairing integrity is audited by mirrored two-game opening set, not by a bare standalone reading of cycle / pairIndex / pairGameNo. The final published material supports a valid Audit PASS and confirms Stockfish 18 as tournament winner.