1rb1n3/p2pkpbr/n3p3/1PP5/Q4BPp/P2P1N1P/4PP2/2R1KBR1 b - - 2 21
FEN state: 1rb1n3/p2pkpbr/n3p3/1PP5/Q4BPp/P2P1N1P/4PP2/2R1KBR1 b - - 2 21 ; Best move: a6c7
The current state of the chess board is: Black rook at b8, black bishop at c8 and black knight at e8. Black pawn at a7, black pawn at d7, black king at e7, black pawn at f7, black bishop at g7 and black rook at h7. Black knight at a6 and black pawn at e6. White pawn at b5 and white pawn at c5. White queen at a4, white bishop at f4, white pawn at g4 and black pawn at h4. White pawn at a3, white pawn at d3, white knight at f3 and white pawn at h3. White pawn at e2 and white pawn at f2. White rook at c1, white king at e1, white bishop at f1 and white rook at g1. Both players have exhausted their castles. Half move number is 2. Full move number is 21. Black to move.