How to Keep a Sudoku Solving Journal

Record decisions, not every move

A useful solving journal is brief. You do not need to copy the whole grid or list all 81 placements. Note the puzzle date or identifier, difficulty, whether you used notes or hints, and the point where progress slowed. Then write down the deduction that restarted the board. For example: 'Missed a hidden single in box six because I was only checking cells, not missing shapes.' That sentence captures a reusable lesson. In Shapedoku, you might also note whether a particular shape was hard to track visually or whether a full symbol sweep exposed the move. A single screenshot can help when the sticking point is visual, but pair it with a sentence explaining what you failed to notice. Images without interpretation quickly become a gallery of old boards. The journal is valuable because it connects a board position to a change in your future behavior.

Separate technique gaps from attention gaps

Not every stuck moment means you need a new advanced strategy. Sometimes you knew the required technique but failed to scan the right unit. Label the cause honestly. A technique gap means the puzzle required a pattern you did not understand, such as a Finned X-Wing. An attention gap means the needed pattern was familiar, but you overlooked it because your notes were stale, you rushed, or you kept returning to the same area. This distinction makes practice efficient. Technique gaps call for study. Attention gaps call for a better solving routine. You may also find emotional patterns. Perhaps mistakes increase when you chase a fast time, or hints become more frequent late at night. Record these observations without judgment. Adjusting the difficulty or session length can solve an attention problem more effectively than studying another advanced technique.

Turn observations into one small practice goal

At the end of each week, review a handful of entries and look for repetition. If several puzzles stalled because you ignored columns, make your next goal a complete row-column-box scan before using a hint. If candidate errors appear often, slow down and clean notes after every placement. If advanced chains are the problem, practice only one chain type for a few boards. Keep the goal narrow enough to remember during play. The journal should make solving calmer and clearer, not add pressure or create a scorecard you feel obliged to improve every day. Measure success by whether the habit improves your decisions, not whether every completion time falls. A week spent making cleaner notes may initially slow you down while producing much stronger solves. Once the routine becomes automatic, speed often returns as a side effect of fewer corrections and less repeated scanning.

1. Write the puzzle date, difficulty, and whether you used hints.
2. Describe the first point where you became stuck.
3. Name the move or technique that restored progress.
4. Classify the issue as a technique gap, attention gap, or note error.
5. Choose one small habit to test in the next few puzzles.
6. Review patterns weekly, then retire goals that no longer appear.