r1b1kbn1/p5pr/n7/1ppp2Np/RP2pP2/4P2B/1P1PK1PP/1NB1R3 b q - 0 17
FEN state: r1b1kbn1/p5pr/n7/1ppp2Np/RP2pP2/4P2B/1P1PK1PP/1NB1R3 b q - 0 17 ; Best move: b5a4
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8, black bishop at f8 and black knight at g8. Black pawn at a7, black pawn at g7 and black rook at h7. Black knight at a6. Black pawn at b5, black pawn at c5, black pawn at d5, white knight at g5 and black pawn at h5. White rook at a4, white pawn at b4, black pawn at e4 and white pawn at f4. White pawn at e3 and white bishop at h3. White pawn at b2, white pawn at d2, white king at e2, white pawn at g2 and white pawn at h2. White knight at b1, white bishop at c1 and white rook at e1. Black queenside is the only castle move available. Half move number is 0. Full move number is 17. Black to move.