rn1q2nr/1p1Nb1k1/5p1p/p2p2p1/1P5B/P1p2N1b/2P1PPP1/3RKB1R w K - 0 18
FEN state: rn1q2nr/1p1Nb1k1/5p1p/p2p2p1/1P5B/P1p2N1b/2P1PPP1/3RKB1R w K - 0 18 ; Best move: d7b8
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at d8, black knight at g8 and black rook at h8. Black pawn at b7, white knight at d7, black bishop at e7 and black king at g7. Black pawn at f6 and black pawn at h6. Black pawn at a5, black pawn at d5 and black pawn at g5. White pawn at b4 and white bishop at h4. White pawn at a3, black pawn at c3, white knight at f3 and black bishop at h3. White pawn at c2, white pawn at e2, white pawn at f2 and white pawn at g2. White rook at d1, 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 0. Full move number is 18. White to move.