4kb1r/prp5/npNp1qbp/2B1n1p1/PPP2p2/5PPP/4P1B1/2RQK1NR w K - 7 21
FEN state: 4kb1r/prp5/npNp1qbp/2B1n1p1/PPP2p2/5PPP/4P1B1/2RQK1NR w K - 7 21 ; Best move: c5d4
The current state of the chess board is: Black king at e8, black bishop at f8 and black rook at h8. Black pawn at a7, black rook at b7 and black pawn at c7. Black knight at a6, black pawn at b6, white knight at c6, black pawn at d6, black queen at f6, black bishop at g6 and black pawn at h6. White bishop at c5, black knight at e5 and black pawn at g5. White pawn at a4, white pawn at b4, white pawn at c4 and black pawn at f4. White pawn at f3, white pawn at g3 and white pawn at h3. White pawn at e2 and white bishop at g2. White rook at c1, white queen 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 7. Full move number is 21. White to move.