rn2kr2/pb2ppb1/q3Nn1p/1p1p4/1p2PP1P/2P2KQ1/P2P2P1/RNB2B1R w q - 0 18
FEN state: rn2kr2/pb2ppb1/q3Nn1p/1p1p4/1p2PP1P/2P2KQ1/P2P2P1/RNB2B1R w q - 0 18 ; Best move: e6c7
The current state of the chess board is: Black rook at a8, black knight at b8, black king at e8 and black rook at f8. Black pawn at a7, black bishop at b7, black pawn at e7, black pawn at f7 and black bishop at g7. Black queen at a6, white knight at e6, black knight at f6 and black pawn at h6. Black pawn at b5 and black pawn at d5. Black pawn at b4, white pawn at e4, white pawn at f4 and white pawn at h4. White pawn at c3, white king at f3 and white queen at g3. White pawn at a2, white pawn at d2 and white pawn at g2. White rook at a1, white knight at b1, white bishop at c1, white bishop at f1 and white rook at h1. Black queenside is the only castle move available. Half move number is 0. Full move number is 18. White to move.