r2k2nr/pqp3pp/1p3p2/P1bppPN1/1n1PP1P1/1P1P4/R5BP/BNQ1K2R b K - 2 21
FEN state: r2k2nr/pqp3pp/1p3p2/P1bppPN1/1n1PP1P1/1P1P4/R5BP/BNQ1K2R b K - 2 21 ; Best move: b4d3
The current state of the chess board is: Black rook at a8, black king at d8, black knight at g8 and black rook at h8. Black pawn at a7, black queen at b7, black pawn at c7, black pawn at g7 and black pawn at h7. Black pawn at b6 and black pawn at f6. White pawn at a5, black bishop at c5, black pawn at d5, black pawn at e5, white pawn at f5 and white knight at g5. Black knight at b4, white pawn at d4, white pawn at e4 and white pawn at g4. White pawn at b3 and white pawn at d3. White rook at a2, white bishop at g2 and white pawn at h2. White bishop at a1, white knight at b1, white queen at c1, white king at e1 and white rook at h1. White kingside is the only castle move available. Half move number is 2. Full move number is 21. Black to move.