rnq1k1rn/p1pp2pp/b4p2/Rp2p3/1bP1P1P1/1PNK1P1B/3P3P/2BQ2NR b - - 12 21
FEN state: rnq1k1rn/p1pp2pp/b4p2/Rp2p3/1bP1P1P1/1PNK1P1B/3P3P/2BQ2NR b - - 12 21 ; Best move: b4a5
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at c8, black king at e8, black rook at g8 and black knight at h8. Black pawn at a7, black pawn at c7, black pawn at d7, black pawn at g7 and black pawn at h7. Black bishop at a6 and black pawn at f6. White rook at a5, black pawn at b5 and black pawn at e5. Black bishop at b4, white pawn at c4, white pawn at e4 and white pawn at g4. White pawn at b3, white knight at c3, white king at d3, white pawn at f3 and white bishop at h3. White pawn at d2 and white pawn at h2. White bishop at c1, white queen at d1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 12. Full move number is 21. Black to move.