2bqkb2/2pp1p1r/r1n1p1Pp/ppP5/Q2N4/3PNPP1/PP2B2P/R1B1K1R1 b Q - 0 21
FEN state: 2bqkb2/2pp1p1r/r1n1p1Pp/ppP5/Q2N4/3PNPP1/PP2B2P/R1B1K1R1 b Q - 0 21 ; Best move: b5a4
The current state of the chess board is: Black bishop at c8, black queen at d8, black king at e8 and black bishop at f8. Black pawn at c7, black pawn at d7, black pawn at f7 and black rook at h7. Black rook at a6, black knight at c6, black pawn at e6, white pawn at g6 and black pawn at h6. Black pawn at a5, black pawn at b5 and white pawn at c5. White queen at a4 and white knight at d4. White pawn at d3, white knight at e3, white pawn at f3 and white pawn at g3. White pawn at a2, white pawn at b2, white bishop at e2 and white pawn at h2. White rook at a1, white bishop at c1, white king at e1 and white rook at g1. White queenside is the only castle move available. Half move number is 0. Full move number is 21. Black to move.