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The best listed performance rating was 2020.","links":{"profile":"https://chess.p-gengler.com/en/players/letzelter-jean-claude-fr-42","seasonPage":"https://chess.p-gengler.com/en/players/letzelter-jean-claude-fr-42/seasons/2025-2026","json":"https://chess.p-gengler.com/api/players/letzelter-jean-claude-fr-42/seasons/2025-2026","search":"https://chess.p-gengler.com/api/search?q=LETZELTER%20Jean-Claude"}}