4kbnr/r4p1p/pppp4/P3p1B1/2B1P1bP/RP3pP1/8/1NnQKR2 b k - 0 20
FEN state: 4kbnr/r4p1p/pppp4/P3p1B1/2B1P1bP/RP3pP1/8/1NnQKR2 b k - 0 20 ; Best move: d6d5
The current state of the chess board is: Black king at e8, black bishop at f8, black knight at g8 and black rook at h8. Black rook at a7, black pawn at f7 and black pawn at h7. Black pawn at a6, black pawn at b6, black pawn at c6 and black pawn at d6. White pawn at a5, black pawn at e5 and white bishop at g5. White bishop at c4, white pawn at e4, black bishop at g4 and white pawn at h4. White rook at a3, white pawn at b3, black pawn at f3 and white pawn at g3. White knight at b1, black knight at c1, white queen at d1, white king at e1 and white rook at f1. Black kingside is the only castle move available. Half move number is 0. Full move number is 20. Black to move.