the only problem I see in challenge 4 is "c6" but when I did that challenge [before you posted today] it worked properly. perhaps the two pieces on c6 was the true problem for try again.
Lesson Challenges Fail
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tal6 wrote:
the only problem I see in challenge 4 is "c6" but when I did that challenge [before you posted today] it worked properly. perhaps the two pieces on c6 was the true problem for try again.
The two pieces is what happens when you try to make the winning move. You move to capture and the piece doesn't get removed. They just both stay there and it says try again.
I reported an error in challenge 4 in the "Other Draws" lesson, the challenge gives a fail after making the final move, but I've found another in ''Forks" challenge 5. The common denominator in both is that they involve a promoted pawn.
The lesson also seems to be rating the computer's last move, not the player's.