r2qkb1r/2p1p3/n4n1p/p2p2p1/R5P1/1PK1QP2/1P1P2BP/1NB3NR b kq - 3 17
FEN state: r2qkb1r/2p1p3/n4n1p/p2p2p1/R5P1/1PK1QP2/1P1P2BP/1NB3NR b kq - 3 17 ; Best move: a6b4
The current state of the chess board is: Black rook at a8, black queen at d8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at c7 and black pawn at e7. Black knight at a6, black knight at f6 and black pawn at h6. Black pawn at a5, black pawn at d5 and black pawn at g5. White rook at a4 and white pawn at g4. White pawn at b3, white king at c3, white queen at e3 and white pawn at f3. White pawn at b2, white pawn at d2, white bishop at g2 and white pawn at h2. White knight at b1, white bishop at c1, white knight at g1 and white rook at h1. Black kingside and black queenside castles are available. Half move number is 3. Full move number is 17. Black to move.