r1b2b1r/1Bpq1k2/np1p2n1/4ppPp/pPPPP1P1/2NQ3R/P4P2/R1B1K1N1 b Q - 0 19
FEN state: r1b2b1r/1Bpq1k2/np1p2n1/4ppPp/pPPPP1P1/2NQ3R/P4P2/R1B1K1N1 b Q - 0 19 ; Best move: a6b4
The current state of the chess board is: Black rook at a8, black bishop at c8, black bishop at f8 and black rook at h8. White bishop at b7, black pawn at c7, black queen at d7 and black king at f7. Black knight at a6, black pawn at b6, black pawn at d6 and black knight at g6. Black pawn at e5, black pawn at f5, white pawn at g5 and black pawn at h5. Black pawn at a4, white pawn at b4, white pawn at c4, white pawn at d4, white pawn at e4 and white pawn at g4. White knight at c3, white queen at d3 and white rook at h3. White pawn at a2 and white pawn at f2. White rook at a1, white bishop at c1, white king at e1 and white knight at g1. White queenside is the only castle move available. Half move number is 0. Full move number is 19. Black to move.