rn2kb2/q2n1p1P/bP6/p1p3BB/3pPK2/3P4/PP3PrP/RN4NR b q - 1 21
FEN state: rn2kb2/q2n1p1P/bP6/p1p3BB/3pPK2/3P4/PP3PrP/RN4NR b q - 1 21 ; Best move: a7b6
The current state of the chess board is: Black rook at a8, black knight at b8, black king at e8 and black bishop at f8. Black queen at a7, black knight at d7, black pawn at f7 and white pawn at h7. Black bishop at a6 and white pawn at b6. Black pawn at a5, black pawn at c5, white bishop at g5 and white bishop at h5. Black pawn at d4, white pawn at e4 and white king at f4. White pawn at d3. White pawn at a2, white pawn at b2, white pawn at f2, black rook at g2 and white pawn at h2. White rook at a1, white knight at b1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 1. Full move number is 21. Black to move.