Easy as

From WPC unofficial wiki


Place letters of the specified list into some cells, no more than one letter per cell, so that each letter appears exactly once in each row and column. The letters outside the grid indicate the first letter that can be seen in the respective row or column from the respective direction. Some letters may already be filled in for you.

(Rules and example (A-C) from PGP IB)

Rule variations[edit]

  • In Double Letter Easy as from WPC 2017, the list contained a repeating letter and there was an additional rule that requires cells sharing an edge not to contain the same letters. (Example in IB used the list {A, G, R, A}, a repeating letter being A.)

History of the puzzle[edit]

Invented by Tetsuya Nishio (Japan). First appeared in November 1990 issue of Puzzler magazine.


There are a lot. See List of Easy as variants.

Appearances in the past WPCs[edit]

Listed here are appearances of classic to almost-classic Easy as puzzles. For variants, see List of Easy as variants#Appearances in the past WPCs.