This puzzle
- LevelEasy
- StartMULE
- TargetEASE
- Letters4
- Par4
From MULE to EASE: 4-letter words, par 4.
3 of the 4 letters differ, so no ladder can be shorter than 3 steps; par 4 means the best route needs 1 detour through a letter that is in neither word.
Letter 4 already matches the target.
Tap a letter of the last word, type the new letter, press Enter. Rules and tips for Word Ladder