2k2bnr/p1qr2p1/np2b1P1/2P1pp1p/Q1Pp4/P1N1PP2/RP1B3P/4K1NR w K - 1 21
FEN state: 2k2bnr/p1qr2p1/np2b1P1/2P1pp1p/Q1Pp4/P1N1PP2/RP1B3P/4K1NR w K - 1 21 ; Best move: c3b5
The current state of the chess board is: Black king at c8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at a7, black queen at c7, black rook at d7 and black pawn at g7. Black knight at a6, black pawn at b6, black bishop at e6 and white pawn at g6. White pawn at c5, black pawn at e5, black pawn at f5 and black pawn at h5. White queen at a4, white pawn at c4 and black pawn at d4. White pawn at a3, white knight at c3, white pawn at e3 and white pawn at f3. White rook at a2, white pawn at b2, white bishop at d2 and white pawn at h2. White king at e1, white knight at g1 and white rook at h1. White kingside is the only castle move available. Half move number is 1. Full move number is 21. White to move.