3k3r/prp4n/np1p2pp/1N4P1/PN1q4/1P1PPbP1/B1P4P/R1BQ1K1R b - - 0 21
FEN state: 3k3r/prp4n/np1p2pp/1N4P1/PN1q4/1P1PPbP1/B1P4P/R1BQ1K1R b - - 0 21 ; Best move: d4g4
The current state of the chess board is: Black king at d8 and black rook at h8. Black pawn at a7, black rook at b7, black pawn at c7 and black knight at h7. Black knight at a6, black pawn at b6, black pawn at d6, black pawn at g6 and black pawn at h6. White knight at b5 and white pawn at g5. White pawn at a4, white knight at b4 and black queen at d4. White pawn at b3, white pawn at d3, white pawn at e3, black bishop at f3 and white pawn at g3. White bishop at a2, white pawn at c2 and white pawn at h2. White rook at a1, white bishop at c1, white queen at d1, white king 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.