Undo, experiment and understand a dead end
Undo removes your most recent pair and restores its tiles. It is helpful when a move closes a route or when you want to compare two choices with the same sym
Make practice useful
Undo removes your most recent pair and restores its tiles. It is helpful when a move closes a route or when you want to compare two choices with the same symbols.
Do not undo automatically whenever a position looks unfamiliar. First identify what has become blocked and what options remain. That short inspection can reveal a different route you overlooked.
Keep the competitive boundary clear
Undo makes the current game practice-only. Ranked results depend on an unassisted sequence that the server can validate, so assisted exploration is kept separate.
A useful exercise is to choose a position with several possible pairs. Try one route, look at what it exposes, undo it, and compare a second route. You are exploring a puzzle rather than correcting a personal failure. If no legal pairs remain, Undo may help you find an earlier branch worth reconsidering. Read about planning ahead.