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31 July.","Regular tournament games come from imported round-by-round game records where available.","Team championship and cup rows are summarized from FLDE team-board result data."],"narrative":"Sieciechowicz Marcin's 2025-2026 season currently includes 1 event. Sieciechowicz Marcin scored 5.5/11 from 11 scored games (3 wins, 5 draws, 3 losses). The average listed opponent rating was 2307.","links":{"profile":"https://www.p-gengler.com/chess/en/players/sieciechowicz-marcin-pol-231","seasonPage":"https://www.p-gengler.com/chess/en/players/sieciechowicz-marcin-pol-231/seasons/2025-2026","json":"https://www.p-gengler.com/chess/api/players/sieciechowicz-marcin-pol-231/seasons/2025-2026","search":"https://www.p-gengler.com/chess/api/search?q=Sieciechowicz%20Marcin"}}