What to train
Sudoku rewards constraint tracking, not guessing.
Specific practice transfers most strongly to similar tasks; broad-transfer claims need caution.
Exercises
Increase difficulty only when accuracy is stable.
- Scan singles.
- Mark candidates.
- Find hidden singles.
- Look for pairs.
Sustainable routine
Use brief regular sessions, adequate sleep, movement, and recovery.
Track accuracy and difficulty rather than expecting a guaranteed IQ increase.
COMMON QUESTIONS