Six engines – Stockfish, Komodo, Houdini, Leela Chess Zero, AllieStein, and Stoofvlees – are seeded directly to Premier Division, based on their top 6 finishes in the previous season. Premier Division is also expanded from 8 engines to 10. The top 2 GPU engines will then contest a playoff against the top 4 CPU engines in League 1, with the four highest-placing engines promoting to Premier Division. For GPU engines, there will be one league only, with up to 16 competitors. The engines in each league are seeded based on their performances in previous seasons. In the Qualification League the top 6 engines promote. While an upgrade to the GPU servers is being secured, the CPU leagues are played first.įor CPU engines, there will first be a Qualification League consisting of 16 engines, followed by League 2 (16 engines) and League 1 (16 engines). Because this upgrade advantages CPU engines compared to GPU engines, TCEC split the qualification paths to Premier Division by introducing separate leagues for CPU and GPU engines. Among other changes, the number of cores available is doubled from 44 to 88, the operating system used is now Linux, and Syzygy endgame tablebases are now cached directly in the RAM for faster access. In keeping with its identity as a competition run at long time controls on high-end hardware, TCEC secured a hardware upgrade for the competing CPU engines.
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