Intermediate puzzles introduce a slower, more deliberate style of solving. This mode keeps explained hints, adds auto notes, and highlights patterns such as naked pairs so players can learn why candidates disappear.
Skills this mode develops
Maintain candidate notes without turning the grid into noise.
Recognize when two cells lock the same two digits inside one unit.
Use eliminations to create new singles instead of guessing.
A steady practice loop
Fill obvious singles first, then add notes to empty cells.
Look for repeated two-candidate cells in each row, column, and box.
After applying a pair, rescan the affected unit for fresh singles.