rnb2k1r/1q2p2p/1Q4PP/p1pp4/P1P2pn1/3R4/1b1PP1P1/RNB1KBN1 w Q - 0 18
FEN state: rnb2k1r/1q2p2p/1Q4PP/p1pp4/P1P2pn1/3R4/1b1PP1P1/RNB1KBN1 w Q - 0 18 ; Best move: b6d8
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at f8 and black rook at h8. Black queen at b7, black pawn at e7 and black pawn at h7. White queen at b6, white pawn at g6 and white pawn at h6. Black pawn at a5, black pawn at c5 and black pawn at d5. White pawn at a4, white pawn at c4, black pawn at f4 and black knight at g4. White rook at d3. Black bishop at b2, white pawn at d2, white pawn at e2 and white pawn at g2. White rook at a1, white knight at b1, white bishop 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.