r1bk1bn1/p3p2r/2Ppq1pp/1pp2p2/5P2/N5PP/PPPQPKB1/R1B3NR b - - 2 13
FEN state: r1bk1bn1/p3p2r/2Ppq1pp/1pp2p2/5P2/N5PP/PPPQPKB1/R1B3NR b - - 2 13 ; Best move: b5b4
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at d8, black bishop at f8 and black knight at g8. Black pawn at a7, black pawn at e7 and black rook at h7. White pawn at c6, black pawn at d6, black queen at e6, black pawn at g6 and black pawn at h6. Black pawn at b5, black pawn at c5 and black pawn at f5. White pawn at f4. White knight at a3, white pawn at g3 and white pawn at h3. White pawn at a2, white pawn at b2, white pawn at c2, white queen at d2, white pawn at e2, white king at f2 and white bishop at g2. White rook at a1, white bishop at c1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 2. Full move number is 13. Black to move.