rn1q1br1/3kpp1p/pp1nb1p1/2P5/3p2PP/P1PP4/3BPP1R/RNQ1KBN1 w Q - 0 18
FEN state: rn1q1br1/3kpp1p/pp1nb1p1/2P5/3p2PP/P1PP4/3BPP1R/RNQ1KBN1 w Q - 0 18 ; Best move: c5d6
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at d8, black bishop at f8 and black rook at g8. Black king at d7, black pawn at e7, black pawn at f7 and black pawn at h7. Black pawn at a6, black pawn at b6, black knight at d6, black bishop at e6 and black pawn at g6. White pawn at c5. Black pawn at d4, white pawn at g4 and white pawn at h4. White pawn at a3, white pawn at c3 and white pawn at d3. White bishop at d2, white pawn at e2, white pawn at f2 and white rook at h2. White rook at a1, white knight at b1, white queen at c1, white king at e1, white bishop at f1 and white knight at g1. White queenside is the only castle move available. Half move number is 0. Full move number is 18. White to move.