rnbq3r/p1ppk1p1/3bpn1p/1p1P1p2/N4P2/6PN/PPPBP2P/1R1QKB1R b - - 2 13
FEN state: rnbq3r/p1ppk1p1/3bpn1p/1p1P1p2/N4P2/6PN/PPPBP2P/1R1QKB1R b - - 2 13 ; Best move: b5a4
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black queen at d8 and black rook at h8. Black pawn at a7, black pawn at c7, black pawn at d7, black king at e7 and black pawn at g7. Black bishop at d6, black pawn at e6, black knight at f6 and black pawn at h6. Black pawn at b5, white pawn at d5 and black pawn at f5. White knight at a4 and white pawn at f4. White pawn at g3 and white knight at h3. White pawn at a2, white pawn at b2, white pawn at c2, white bishop at d2, white pawn at e2 and white pawn at h2. White rook at b1, white queen at d1, white king at e1, white bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 2. Full move number is 13. Black to move.