rnb1k1n1/p1q2pB1/1p1pp2p/2p5/4P2p/bPPPKP2/3N3P/R1Q2BNR w q - 0 21
FEN state: rnb1k1n1/p1q2pB1/1p1pp2p/2p5/4P2p/bPPPKP2/3N3P/R1Q2BNR w q - 0 21 ; Best move: c1a3
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at e8 and black knight at g8. Black pawn at a7, black queen at c7, black pawn at f7 and white bishop at g7. Black pawn at b6, black pawn at d6, black pawn at e6 and black pawn at h6. Black pawn at c5. White pawn at e4 and black pawn at h4. Black bishop at a3, white pawn at b3, white pawn at c3, white pawn at d3, white king at e3 and white pawn at f3. White knight at d2 and white pawn at h2. White rook at a1, white queen at c1, 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 0. Full move number is 21. White to move.