rRb3kr/1p1pb1pp/p7/3NnpB1/8/R1P2p2/1P2PPPP/3K1BR1 b - - 0 21
FEN state: rRb3kr/1p1pb1pp/p7/3NnpB1/8/R1P2p2/1P2PPPP/3K1BR1 b - - 0 21 ; Best move: a8b8
The current state of the chess board is: Black rook at a8, white rook at b8, black bishop at c8, black king at g8 and black rook at h8. Black pawn at b7, black pawn at d7, black bishop at e7, black pawn at g7 and black pawn at h7. Black pawn at a6. White knight at d5, black knight at e5, black pawn at f5 and white bishop at g5. White rook at a3, white pawn at c3 and black pawn at f3. White pawn at b2, white pawn at e2, white pawn at f2, white pawn at g2 and white pawn at h2. White king at d1, white bishop at f1 and white rook at g1. Both players have exhausted their castles. Half move number is 0. Full move number is 21. Black to move.