r2k1b1r/1pp1p1p1/pNq1bp1p/3p3P/1n1P1P1P/1P2BR2/P1P1N3/R1Q1KB2 b Q - 1 21
FEN state: r2k1b1r/1pp1p1p1/pNq1bp1p/3p3P/1n1P1P1P/1P2BR2/P1P1N3/R1Q1KB2 b Q - 1 21 ; Best move: c7b6
The current state of the chess board is: Black rook at a8, black king at d8, black bishop at f8 and black rook at h8. Black pawn at b7, black pawn at c7, black pawn at e7 and black pawn at g7. Black pawn at a6, white knight at b6, black queen at c6, black bishop at e6, black pawn at f6 and black pawn at h6. Black pawn at d5 and white pawn at h5. Black knight at b4, white pawn at d4, white pawn at f4 and white pawn at h4. White pawn at b3, white bishop at e3 and white rook at f3. White pawn at a2, white pawn at c2 and white knight at e2. White rook at a1, white queen at c1, white king at e1 and white bishop at f1. White queenside is the only castle move available. Half move number is 1. Full move number is 21. Black to move.