rn2k1r1/4qpbp/pp4pn/Q1Pp4/P1PP1pPP/B4N1b/4P3/RN2KB1R w q - 5 18
FEN state: rn2k1r1/4qpbp/pp4pn/Q1Pp4/P1PP1pPP/B4N1b/4P3/RN2KB1R w q - 5 18 ; Best move: c5b6
The current state of the chess board is: Black rook at a8, black knight at b8, black king at e8 and black rook at g8. Black queen at e7, black pawn at f7, black bishop at g7 and black pawn at h7. Black pawn at a6, black pawn at b6, black pawn at g6 and black knight at h6. White queen at a5, white pawn at c5 and black pawn at d5. White pawn at a4, white pawn at c4, white pawn at d4, black pawn at f4, white pawn at g4 and white pawn at h4. White bishop at a3, white knight at f3 and black bishop at h3. White pawn at e2. White rook at a1, white knight at b1, white king at e1, white bishop at f1 and white rook at h1. Black queenside is the only castle move available. Half move number is 5. Full move number is 18. White to move.