1B2bbr1/1pp1p1p1/n2p1p2/pk5p/4PPNP/1qPPnN2/P2K4/R4B1R w - - 0 21
FEN state: 1B2bbr1/1pp1p1p1/n2p1p2/pk5p/4PPNP/1qPPnN2/P2K4/R4B1R w - - 0 21 ; Best move: f3d4
The current state of the chess board is: White bishop at b8, black bishop at e8, black bishop at f8 and black rook at g8. Black pawn at b7, black pawn at c7, black pawn at e7 and black pawn at g7. Black knight at a6, black pawn at d6 and black pawn at f6. Black pawn at a5, black king at b5 and black pawn at h5. White pawn at e4, white pawn at f4, white knight at g4 and white pawn at h4. Black queen at b3, white pawn at c3, white pawn at d3, black knight at e3 and white knight at f3. White pawn at a2 and white king at d2. White rook at a1, white bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 21. White to move.