r1b2rk1/N1p4p/pp1b1ppn/3pp3/2P1P2P/Pn2K1Q1/1P4P1/R1B2B1R b - - 0 21
FEN state: r1b2rk1/N1p4p/pp1b1ppn/3pp3/2P1P2P/Pn2K1Q1/1P4P1/R1B2B1R b - - 0 21 ; Best move: a8a7
The current state of the chess board is: Black rook at a8, black bishop at c8, black rook at f8 and black king at g8. White knight at a7, black pawn at c7 and black pawn at h7. Black pawn at a6, black pawn at b6, black bishop at d6, black pawn at f6, black pawn at g6 and black knight at h6. Black pawn at d5 and black pawn at e5. White pawn at c4, white pawn at e4 and white pawn at h4. White pawn at a3, black knight at b3, white king at e3 and white queen at g3. White pawn at b2 and white pawn at g2. White rook at a1, white bishop at c1, white bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 21. Black to move.