2q1kb1r/1ppbppp1/2n4p/3P4/1Q6/Pp1PP3/3N2PB/1R2KBNn w k - 4 20
FEN state: 2q1kb1r/1ppbppp1/2n4p/3P4/1Q6/Pp1PP3/3N2PB/1R2KBNn w k - 4 20 ; Best move: d5c6
The current state of the chess board is: Black queen at c8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at b7, black pawn at c7, black bishop at d7, black pawn at e7, black pawn at f7 and black pawn at g7. Black knight at c6 and black pawn at h6. White pawn at d5. White queen at b4. White pawn at a3, black pawn at b3, white pawn at d3 and white pawn at e3. White knight at d2, white pawn at g2 and white bishop at h2. White rook at b1, white king at e1, white bishop at f1, white knight at g1 and black knight at h1. Black kingside is the only castle move available. Half move number is 4. Full move number is 20. White to move.