[Event "Atomic endgames: Pawnitisation: Fixing pawns"] [Site "https://lichess.org/study/iS3Dp19A/z4dXlOW9"] [Result "*"] [Variant "Atomic"] [ECO "?"] [Opening "?"] [Annotator "https://lichess.org/@/Illion"] [FEN "4k3/8/1p1p4/8/8/P2P4/8/2B1K3 b - - 0 1"] [SetUp "1"] [UTCDate "2017.10.06"] [UTCTime "15:24:20"] [Source "https://lichess.org/study/iS3Dp19A/z4dXlOW9"] [Orientation "black"] { Black to move and defend. Black has to push both pawns a square each, but here the order matters. White is threatening a4!, fixing black's pawn on the dark square b6, winning. Therefore, black should push the b-pawn first. } 1... b5! (1... d5? 2. a4! { The a- and b-pawns here are mutually fixed. Whichever player pushes a pawn, their opponent can choose between exchanging pawns (black wants this) or having a passed pawn each (white wants this). } { [%csl Ga4,Gb6] } 2... Kd8 3. Be3 { The difference is that white can attack b6 and force black to advance. } 3... b5 (3... d4 4. Bxd4 b5 5. a5 $18) 4. a5 Kc8 5. a6 Kb8 6. a7+ Ka8 7. Bd2 b4 8. Bxb4 { White wins. (KQP v KP technique) }) 2. d4 { Threatening d5, fixing the black pawn on d6. } 2... d5 $10 { Pawnitisation achieved, draw. } *