2bk3r/r1p1nR1p/p3p1p1/P2pn3/7P/1p2B3/2P1NPPN/3QKB1R b K - 0 21
FEN state: 2bk3r/r1p1nR1p/p3p1p1/P2pn3/7P/1p2B3/2P1NPPN/3QKB1R b K - 0 21 ; Best move: a7b7
The current state of the chess board is: Black bishop at c8, black king at d8 and black rook at h8. Black rook at a7, black pawn at c7, black knight at e7, white rook at f7 and black pawn at h7. Black pawn at a6, black pawn at e6 and black pawn at g6. White pawn at a5, black pawn at d5 and black knight at e5. White pawn at h4. Black pawn at b3 and white bishop at e3. White pawn at c2, white knight at e2, white pawn at f2, white pawn at g2 and white knight at h2. White queen at d1, white king at e1, white bishop at f1 and white rook at h1. White kingside is the only castle move available. Half move number is 0. Full move number is 21. Black to move.