1nq1kb1r/2rb4/1Pp4n/p2ppppp/N7/RPN1KPPB/2PPP3/2BQ2R1 b k - 4 20
FEN state: 1nq1kb1r/2rb4/1Pp4n/p2ppppp/N7/RPN1KPPB/2PPP3/2BQ2R1 b k - 4 20 ; Best move: d5d4
The current state of the chess board is: Black knight at b8, black queen at c8, black king at e8, black bishop at f8 and black rook at h8. Black rook at c7 and black bishop at d7. White pawn at b6, black pawn at c6 and black knight at h6. Black pawn at a5, black pawn at d5, black pawn at e5, black pawn at f5, black pawn at g5 and black pawn at h5. White knight at a4. White rook at a3, white pawn at b3, white knight at c3, white king at e3, white pawn at f3, white pawn at g3 and white bishop at h3. White pawn at c2, white pawn at d2 and white pawn at e2. White bishop at c1, white queen at d1 and white rook at g1. Black kingside is the only castle move available. Half move number is 4. Full move number is 20. Black to move.