1rb2kn1/1npp2p1/p4B2/Pp3q1r/2P4P/2NP4/1P2PPR1/R3KBN1 w Q - 1 21
FEN state: 1rb2kn1/1npp2p1/p4B2/Pp3q1r/2P4P/2NP4/1P2PPR1/R3KBN1 w Q - 1 21 ; Best move: f6g7
The current state of the chess board is: Black rook at b8, black bishop at c8, black king at f8 and black knight at g8. Black knight at b7, black pawn at c7, black pawn at d7 and black pawn at g7. Black pawn at a6 and white bishop at f6. White pawn at a5, black pawn at b5, black queen at f5 and black rook at h5. White pawn at c4 and white pawn at h4. White knight at c3 and white pawn at d3. White pawn at b2, white pawn at e2, white pawn at f2 and white rook at g2. White rook at a1, white king at e1, white bishop at f1 and white knight at g1. White queenside is the only castle move available. Half move number is 1. Full move number is 21. White to move.