Daily puzzlers would be quick to tell you that sudoku, Wordle’s mathematical cousin, is not as easy as it looks. The small grid, found often next to a word scramble or comic strip in a print newspaper ...

Divyang “Dave” Pandit, an engineer-author whose Sudoku guide was featured in the Sept. 15 Travel section, will present his puzzle-solving strategies Jan. 7 at the Sunnyvale Public Library, 665 W.