rn2kb1r/7p/p1qpp3/P1pPNp2/1p4nP/R2B3b/1PPNPP2/2BQK2R b q - 5 21
FEN state: rn2kb1r/7p/p1qpp3/P1pPNp2/1p4nP/R2B3b/1PPNPP2/2BQK2R b q - 5 21 ; Best move: c6d5
The current state of the chess board is: Black rook at a8, black knight at b8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at h7. Black pawn at a6, black queen at c6, black pawn at d6 and black pawn at e6. White pawn at a5, black pawn at c5, white pawn at d5, white knight at e5 and black pawn at f5. Black pawn at b4, black knight at g4 and white pawn at h4. White rook at a3, white bishop at d3 and black bishop at h3. White pawn at b2, white pawn at c2, white knight at d2, white pawn at e2 and white pawn at f2. White bishop at c1, white queen at d1, white king at e1 and white rook at h1. Black queenside is the only castle move available. Half move number is 5. Full move number is 21. Black to move.