Edge Hints app for iPhone and iPad

Edge hints is a fun and challenging puzzle also known as "Easy as ABC" or buchstabensalat. Think of the puzzle like Sudoku (but different!).

The goal of this dangerously addictive puzzle is to complete the grid so that each row and column contains only one instance of the letters A, B and C. Here’s the trick—in every row and column, one box is always empty. This gets marked with a dot.

Edge hints show the first letter that should appear in the grid from that direction. But here’s the challenge—that tricky dot could appear first.

As you get better, you can change the difficulty level and try bigger puzzles with more letters. Are you ready?