rn2kbn1/pp2p1r1/2p1bp2/3pqPp1/PPB3P1/2PPP2N/1B1Q4/RN4KR w q - 0 24
FEN state: rn2kbn1/pp2p1r1/2p1bp2/3pqPp1/PPB3P1/2PPP2N/1B1Q4/RN4KR w q - 0 24 ; Best move: c4b3
The current state of the chess board is: Black rook at a8, black knight at b8, black king at e8, black bishop at f8 and black knight at g8. Black pawn at a7, black pawn at b7, black pawn at e7 and black rook at g7. Black pawn at c6, black bishop at e6 and black pawn at f6. Black pawn at d5, black queen at e5, white pawn at f5 and black pawn at g5. White pawn at a4, white pawn at b4, white bishop at c4 and white pawn at g4. White pawn at c3, white pawn at d3, white pawn at e3 and white knight at h3. White bishop at b2 and white queen at d2. White rook at a1, white knight at b1, white king at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 0. Full move number is 24. White to move.