r1b1kr2/p1p2ppp/1Qn1p3/3pn1B1/4P2P/P1PP1qP1/RPK2P2/1N3BNR w q - 1 18
FEN state: r1b1kr2/p1p2ppp/1Qn1p3/3pn1B1/4P2P/P1PP1qP1/RPK2P2/1N3BNR w q - 1 18 ; Best move: b6c6
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8 and black rook at f8. Black pawn at a7, black pawn at c7, black pawn at f7, black pawn at g7 and black pawn at h7. White queen at b6, black knight at c6 and black pawn at e6. Black pawn at d5, black knight at e5 and white bishop at g5. White pawn at e4 and white pawn at h4. White pawn at a3, white pawn at c3, white pawn at d3, black queen at f3 and white pawn at g3. White rook at a2, white pawn at b2, white king at c2 and white pawn at f2. White knight at b1, white bishop at f1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 1. Full move number is 18. White to move.