1nbqk1nr/r2p4/2pbpp2/pp3NB1/2PP4/1P5Q/P2NPP2/R1K2Br1 b k - 1 20
FEN state: 1nbqk1nr/r2p4/2pbpp2/pp3NB1/2PP4/1P5Q/P2NPP2/R1K2Br1 b k - 1 20 ; Best move: d6a3
The current state of the chess board is: Black knight at b8, black bishop at c8, black queen at d8, black king at e8, black knight at g8 and black rook at h8. Black rook at a7 and black pawn at d7. Black pawn at c6, black bishop at d6, black pawn at e6 and black pawn at f6. Black pawn at a5, black pawn at b5, white knight at f5 and white bishop at g5. White pawn at c4 and white pawn at d4. White pawn at b3 and white queen at h3. White pawn at a2, white knight at d2, white pawn at e2 and white pawn at f2. White rook at a1, white king at c1, white bishop at f1 and black rook at g1. Black kingside is the only castle move available. Half move number is 1. Full move number is 20. Black to move.