Why was the next puzzle easier than the previous one?

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Avatar of Trexler3241

https://www.chess.com/puzzles/rush/Trexler3241/3G56ce

Puzzle 23 was 1319 but puzzle 24 was 1318. Why?

Avatar of notmtwain
Trexler3241 wrote:

https://www.chess.com/puzzles/rush/Trexler3241/3G56ce

Puzzle 23 was 1319 but puzzle 24 was 1318. Why?

How should anyone know? Chess.com does not reveal its methods.