1r2kbnr/ppq1pp1p/n2p4/4N1p1/P2p3P/6PR/RPP1PP2/2BQKBN1 b k - 0 9
FEN state: 1r2kbnr/ppq1pp1p/n2p4/4N1p1/P2p3P/6PR/RPP1PP2/2BQKBN1 b k - 0 9 ; Best move: a6b4
The current state of the chess board is: Black rook at b8, black king at e8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at b7, black queen at c7, black pawn at e7, black pawn at f7 and black pawn at h7. Black knight at a6 and black pawn at d6. White knight at e5 and black pawn at g5. White pawn at a4, black pawn at d4 and white pawn at h4. White pawn at g3 and white rook at h3. White rook at a2, white pawn at b2, white pawn at c2, white pawn at e2 and white pawn at f2. White bishop at c1, white queen at d1, white king at e1, white bishop at f1 and white knight at g1. Black kingside is the only castle move available. Half move number is 0. Full move number is 9. Black to move.