r1bq1b2/p2pkpp1/1Np1p2r/3n4/1P5p/B1PP3N/P2P1PPP/2RQKB1R b - - 0 13
FEN state: r1bq1b2/p2pkpp1/1Np1p2r/3n4/1P5p/B1PP3N/P2P1PPP/2RQKB1R b - - 0 13 ; Best move: a7b6
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8 and black bishop at f8. Black pawn at a7, black pawn at d7, black king at e7, black pawn at f7 and black pawn at g7. White knight at b6, black pawn at c6, black pawn at e6 and black rook at h6. Black knight at d5. White pawn at b4 and black pawn at h4. White bishop at a3, white pawn at c3, white pawn at d3 and white knight at h3. White pawn at a2, white pawn at d2, white pawn at f2, white pawn at g2 and white pawn at h2. White rook at c1, 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 0. Full move number is 13. Black to move.