r3kb2/4nq1r/2n5/p1ppp1pp/2pPP3/N1K1BP1P/PPQ1B1PR/2R3N1 b q - 6 21
FEN state: r3kb2/4nq1r/2n5/p1ppp1pp/2pPP3/N1K1BP1P/PPQ1B1PR/2R3N1 b q - 6 21 ; Best move: c5d4
The current state of the chess board is: Black rook at a8, black king at e8 and black bishop at f8. Black knight at e7, black queen at f7 and black rook at h7. Black knight at c6. Black pawn at a5, black pawn at c5, black pawn at d5, black pawn at e5, black pawn at g5 and black pawn at h5. Black pawn at c4, white pawn at d4 and white pawn at e4. White knight at a3, white king at c3, white bishop at e3, white pawn at f3 and white pawn at h3. White pawn at a2, white pawn at b2, white queen at c2, white bishop at e2, white pawn at g2 and white rook at h2. White rook at c1 and white knight at g1. Black queenside is the only castle move available. Half move number is 6. Full move number is 21. Black to move.