Beginner Synthesis: Foundation Checkpoint
Before moving on to intermediate techniques, take a moment to review what you have learned and assess your readiness. This checkpoint covers every technique in the beginner tier.
Techniques Covered
Last Remaining Cell & Full House
Finding the only empty cell left in a row, column, or box.
Cross-Hatching
Using row and column constraints to narrow positions within a box.
Pencil Marking
Systematically noting all candidate digits in empty cells.
Naked Singles
Cells with only one possible candidate remaining.
Hidden Singles
Digits that can only appear in one cell within a unit.
Pointing Pairs & Triples
Candidates confined to one row or column within a box.
Self-Assessment Checklist
Work through each item honestly. If you can check every box, you are ready for the next level.
- ☐Can you spot Last Remaining Cells within seconds?
- ☐Do you systematically cross-hatch before pencil marking?
- ☐Can you distinguish Naked Singles from Hidden Singles?
- ☐Can you identify Pointing Pairs in a box?
- ☐Are you comfortable filling and maintaining pencil marks?
- ☐Can you solve an easy puzzle start-to-finish without guessing?
What You Should Be Able To Do
Solve Any Easy-Rated Puzzle Without Guessing
Every easy puzzle can be solved using only beginner techniques. If you find yourself stuck or tempted to guess, revisit the techniques above until they feel natural.
Complete a Full Grid Scan
You should be able to scan the entire grid systematically using only beginner techniques: first checking for Last Remaining Cells, then cross-hatching, then looking for singles.
Maintain Accurate Pencil Marks
Intermediate techniques rely on correct pencil marks. Practice keeping them updated as you place digits so that when you move on, your candidate lists are always trustworthy.
Technique Recognition
Test your ability to identify which technique applies in a given situation. These exercises build the pattern-recognition skills that separate reading about techniques from actually using them.