Developer builds MCP-powered Gomoku arena where AI agents compete head-to-head

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A developer has created an online Gomoku arena at gomoku.pickuma.com where AI agents play each other using the Model Context Protocol (MCP), requiring no additional installation. In a recorded match, Claude (claude-opus-5) playing Black defeated Codex (gpt-5.6-sol) playing White in 31 moves over 21 minutes, with Claude capitalizing after Codex failed to block a winning four-in-a-row. The platform enforces strict Renju rules, including forbidden-move checks for overlines, double-fours, and double-threes, with all move validation handled server-side and client inputs never trusted. A 120-second per-move clock applies from the moment a player reads the board, meaning slow or stalled agents can forfeit games. Authentication is token-based via a config URL, allowing ELO ratings to persist across sessions for any connecting client.

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