2rqkbnr/2p2pp1/p1P1n3/1P2p2p/P2p4/2NPPP2/RBQKB1PP/6NR b k - 1 21
FEN state: 2rqkbnr/2p2pp1/p1P1n3/1P2p2p/P2p4/2NPPP2/RBQKB1PP/6NR b k - 1 21 ; Best move: d8g5
The current state of the chess board is: Black rook at c8, black queen at d8, black king at e8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at c7, black pawn at f7 and black pawn at g7. Black pawn at a6, white pawn at c6 and black knight at e6. White pawn at b5, black pawn at e5 and black pawn at h5. White pawn at a4 and black pawn at d4. White knight at c3, white pawn at d3, white pawn at e3 and white pawn at f3. White rook at a2, white bishop at b2, white queen at c2, white king at d2, white bishop at e2, white pawn at g2 and white pawn at h2. White knight at g1 and white rook at h1. Black kingside is the only castle move available. Half move number is 1. Full move number is 21. Black to move.