From Easy to Expert: Milestones for Improving

There is no reliable calendar that turns a new solver into an expert. Your experience, the puzzles and the help you use all matter. Follow these checkpoints at your own pace; a harder difficulty is an option, not a deadline.

First checkpoint: explain your singles

Learn the three rules in the beginner course. Practise naked singles and hidden singles. Before entering a digit, say why the cell or the position is forced. A correct answer copied from a solution is different from explaining the move.

Next checkpoint: keep candidates current

When singles stop producing moves, verify recent entries and notes. Study naked pairs and box-line interactions one at a time. Check the exact candidate conditions and name the cells that can lose a digit. Return to singles after every useful elimination.

Then connect distant parts of the grid

Try a worked X-Wing, wing or coloring lesson when you want another tool. Reproduce its reasoning without relying only on the highlighted cells. A daily puzzle may not contain the technique you studied, so use the fixed lesson to practise that specific deduction.

Track progress without a deadline

Record a deduction you can explain, an error you caught and any hints used. Compare puzzles from the same source and difficulty if you track time. Do not multiply an invented learning timeline by the number of sessions: practice frequency alone cannot predict when a particular technique becomes familiar.

The flexible practice plan suggests an order for sessions, and the difficulty guide explains how labels vary. You can stay at a level you enjoy, take breaks or revisit an earlier lesson.