r1b1kr2/1p2q1pp/3ppp2/p1P1N3/P2P1Pn1/b5PP/nP2P3/2BQKBR1 b q - 0 17
FEN state: r1b1kr2/1p2q1pp/3ppp2/p1P1N3/P2P1Pn1/b5PP/nP2P3/2BQKBR1 b q - 0 17 ; Best move: a3b4
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8 and black rook at f8. Black pawn at b7, black queen at e7, black pawn at g7 and black pawn at h7. Black pawn at d6, black pawn at e6 and black pawn at f6. Black pawn at a5, white pawn at c5 and white knight at e5. White pawn at a4, white pawn at d4, white pawn at f4 and black knight at g4. Black bishop at a3, white pawn at g3 and white pawn at h3. Black knight at a2, white pawn at b2 and white pawn at e2. White bishop at c1, white queen at d1, white king at e1, white bishop at f1 and white rook at g1. Black queenside is the only castle move available. Half move number is 0. Full move number is 17. Black to move.