[Event "Pseudo sacrifice d'un Pion"] [Site "https://lichess.org/study/xOVSnWLR/plZErZKI"] [Date "????.??.??"] [Result "*"] [Variant "From Position"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/michel_PR"] [FEN "rnbr2k1/pp5p/3p2pn/2pPppN1/4P3/2NB3P/PPP2PP1/R3K2R w KQ - 0 1"] [SetUp "1"] [Source "https://lichess.org/study/xOVSnWLR/plZErZKI"] [Orientation "white"] 1. f4! exf4 2. O-O Na6 3. Rxf4 { Les Blancs récupèrent le Pion avec gain de temps } *