r3qbnr/2p3pp/3kbp2/pP1p4/n1Pp3N/4BP2/RP1NP1PP/1Q2KB1R b K - 1 18
FEN state: r3qbnr/2p3pp/3kbp2/pP1p4/n1Pp3N/4BP2/RP1NP1PP/1Q2KB1R b K - 1 18 ; Best move: d4e3
The current state of the chess board is: Black rook at a8, black queen at e8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at c7, black pawn at g7 and black pawn at h7. Black king at d6, black bishop at e6 and black pawn at f6. Black pawn at a5, white pawn at b5 and black pawn at d5. Black knight at a4, white pawn at c4, black pawn at d4 and white knight at h4. White bishop at e3 and white pawn at f3. White rook at a2, white pawn at b2, white knight at d2, white pawn at e2, white pawn at g2 and white pawn at h2. White queen at b1, white king at e1, white bishop at f1 and white rook at h1. White kingside is the only castle move available. Half move number is 1. Full move number is 18. Black to move.