1rb2b1r/p3pkp1/n1p2n1p/1p1p1p1P/1P2PP1R/q1P3Q1/3PB1P1/RN2K1N1 b Q - 3 16
FEN state: 1rb2b1r/p3pkp1/n1p2n1p/1p1p1p1P/1P2PP1R/q1P3Q1/3PB1P1/RN2K1N1 b Q - 3 16 ; Best move: a3a1
The current state of the chess board is: Black rook at b8, black bishop at c8, black bishop at f8 and black rook at h8. Black pawn at a7, black pawn at e7, black king at f7 and black pawn at g7. Black knight at a6, black pawn at c6, black knight at f6 and black pawn at h6. Black pawn at b5, black pawn at d5, black pawn at f5 and white pawn at h5. White pawn at b4, white pawn at e4, white pawn at f4 and white rook at h4. Black queen at a3, white pawn at c3 and white queen at g3. White pawn at d2, white bishop at e2 and white pawn at g2. White rook at a1, white knight at b1, white king at e1 and white knight at g1. White queenside is the only castle move available. Half move number is 3. Full move number is 16. Black to move.