If there is a 5-card challenge and a negative card is played, the challenge is described as tending weak. If a neutral asset card is played, the challenge is still described as tending weak, with 2 orange icons in the grid. To a player this looks like 3 positive cards need to be played to end positive, but in fact, 2 would do the trick.

With large challenges (e.g., 9 cards), where one has to balance strength, weakness, and asset cards just to achieve the number, the "challenge grid" is not very helpful, since it is a single color.