STRIMKO is a Sudoku-type logic puzzle created by The Grabarchuk Family. The main difference is that whereas in Sudoku every row, column and 3x3 square must contain different numbers, in STRIMKO every row, column and stream must contain different numbers. The grid size of STRIMKO varies, with the larger problems usually being harder to solve.

Below you will find a large collection of problem sets to print out and work on. For even more STRIMKOs, visit If you want to have these puzzles on the go, you can also purchase an app for your Apple device by clicking the corresponding link - MAC, MOBILE.

Remark: All materials are copyrighted, for personal use only. If you want to use any of them for a book, app, website or periodical, please contact the authors first.