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FIDE ID 1025449 · born 1956 · last updated 5/12/2026
Standard
1870
Rapid
1858
Blitz
1886
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Prep report
Their repertoire vs yours
Once you have a candidate account, we cross-reference its opening tree against your imported games, surfacing the lines they play that you don’t know, the leaks in their repertoire you can punish, and the gaps in yours you’ll need to plug before the game.
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AI matching by sample game
We checked our stored public PGN sources for FIDE ID 1025449 and do not have usable games for Janssen yet. Paste games below to run repertoire matching by play pattern.
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