rn1q1k2/1pr1ppb1/p2p4/6p1/PPp1P1b1/1NPP4/4B2P/3RK1NR w K - 1 21
FEN state: rn1q1k2/1pr1ppb1/p2p4/6p1/PPp1P1b1/1NPP4/4B2P/3RK1NR w K - 1 21 ; Best move: d3c4
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at d8 and black king at f8. Black pawn at b7, black rook at c7, black pawn at e7, black pawn at f7 and black bishop at g7. Black pawn at a6 and black pawn at d6. Black pawn at g5. White pawn at a4, white pawn at b4, black pawn at c4, white pawn at e4 and black bishop at g4. White knight at b3, white pawn at c3 and white pawn at d3. White bishop at e2 and white pawn at h2. White rook at d1, white king at e1, white knight at g1 and white rook at h1. White kingside is the only castle move available. Half move number is 1. Full move number is 21. White to move.