2026.11.03 · All 55 puzzles → On this pageLeaderboardHow it worksOne record up closeWhat separates the modelsWhat the models builtGod modeCo-discoveryPareto explorerMethodsRelated workCiteCreditsAll 55 puzzles → Twelve nodes. Two registers per node. Fifteen lines of code. In TIS-100, even multiplying two numbers is a small engineering project, and players have spent a decade optimizing these programs on a public community leaderboard. We gave 16 LLMs the game and its manual, withheld the leaderb...