r1bqk2r/p1p4p/1pnppn1b/3BNp1P/1P1P1P2/P5P1/N1P1P3/1RQ1K2R b K - 5 20
FEN state: r1bqk2r/p1p4p/1pnppn1b/3BNp1P/1P1P1P2/P5P1/N1P1P3/1RQ1K2R b K - 5 20 ; Best move: c6d4
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black king at e8 and black rook at h8. Black pawn at a7, black pawn at c7 and black pawn at h7. Black pawn at b6, black knight at c6, black pawn at d6, black pawn at e6, black knight at f6 and black bishop at h6. White bishop at d5, white knight at e5, black pawn at f5 and white pawn at h5. White pawn at b4, white pawn at d4 and white pawn at f4. White pawn at a3 and white pawn at g3. White knight at a2, white pawn at c2 and white pawn at e2. White rook at b1, white queen at c1, white king at e1 and white rook at h1. White kingside is the only castle move available. Half move number is 5. Full move number is 20. Black to move.