r5nr/3pbppp/np6/p3Pk2/PPPB4/3P2PP/3RP1B1/1N2K1NR b K - 0 20
FEN state: r5nr/3pbppp/np6/p3Pk2/PPPB4/3P2PP/3RP1B1/1N2K1NR b K - 0 20 ; Best move: d7d6
The current state of the chess board is: Black rook at a8, black knight at g8 and black rook at h8. Black pawn at d7, black bishop at e7, black pawn at f7, black pawn at g7 and black pawn at h7. Black knight at a6 and black pawn at b6. Black pawn at a5, white pawn at e5 and black king at f5. White pawn at a4, white pawn at b4, white pawn at c4 and white bishop at d4. White pawn at d3, white pawn at g3 and white pawn at h3. White rook at d2, white pawn at e2 and white bishop at g2. White knight at b1, white king at e1, white knight at g1 and white rook at h1. White kingside is the only castle move available. Half move number is 0. Full move number is 20. Black to move.