Krypto#2[√2x, √3x, √6x]
The encryption key tells us how the numbers on the board have been encoded.
To correctly fill in the empty cells, first decrypt the numbers (that is, use the inverse of the encryption key) to find the correct digit for a given position.
Next, apply the standard sudoku rules: compare digits in rows, columns, and 3×3 squares to eliminate impossible options and identify the correct digit.
The following step is to re-encrypt the chosen digit – in other words, substitute it into the formula (the part of the key corresponding to that module) and then write on the board the resulting value (which can be either a square root or a regular number if the expression simplifies).
Finally, fill the entire board so that it is encoded according to exactly the same key as the initial puzzle – but now with all cells completed.
Encryption key: [√2x, √3x, √6x]
| Number | Module I (cols. 1–3) [√2x] |
Module II (cols. 4–6) [√3x] |
Module III (cols. 7–9) [√6x] |
|---|---|---|---|
| 1 | √2 | √3 | √6 |
| 2 | 2 | √6 | 2√3 |
| 3 | √6 | 3 | 3√2 |
| 4 | 2√2 | 2√3 | 2√6 |
| 5 | √10 | √15 | √30 |
| 6 | 2√3 | 3√2 | 6 |
| 7 | √14 | √21 | √42 |
| 8 | 4 | 2√6 | 4√3 |
| 9 | 3√2 | 3√3 | 3√6 |
How to Solve SudokuCrypto #2?
Select the correct vertical module (3 columns).
Decrypt the cell using the inverse of the encryption key.
Apply the standard sudoku rules to find the correct digit for that position.
Encrypt the chosen digit (according to the key for that module) and enter its form on the board — it will be either a square root expression or a regular number if the expression simplifies.
Repeat these steps until the entire board is filled with encrypted values.
A Brief History of Sudoku – Origins and Euler’s Inspiration
Although online sudoku became extremely popular in the 21st century, the roots of this logic puzzle go much further back. In the 18th century, Swiss mathematician Leonhard Euler introduced the concept of Latin squares. This was a mathematical structure in which no numbers or symbols repeated within any row or column. Importantly, this very idea later inspired the creation of modern sudoku.
Moreover, the first publications of puzzles similar to sudoku appeared in France at the beginning of the 19th century. However, the real sudoku boom occurred in Japan at the end of the 20th century. As a result, today we can enjoy a variety of online sudoku formats – from the classic version to mathematical encryption key variants like SudokuIQ.
In addition, our website offers not only online sudoku with square roots but also other unique variations, such as sudoku with powers and alternative encryption keys. So, if you want to try a different type of logic puzzle with roots and a modified cipher, check out our square root sudoku available online.
Thanks to its rich history and constant evolution, online sudoku continues to surprise with new ideas and formats. For this reason, every puzzle enthusiast can find something truly unique here!