Regex Golf: Verify a Sudoku Solution code-golfregular-expressionsudoku Write a regex which matches any valid sudoku solution and doesn't match any invalid sudoku solution. The input is an unrolled version of the sudoku, i.e. there are no line delimiters. E.g. the following board: 7 2 5 8 9 3 4...

A simple challenge, requiring the program to output the sum of all the odd square numbers, smaller than 10,000.

MATL is a golfing language created by Luis Mendo. MATL has proven to be highly competitive, often beating submissions in other golfing languages such as Pyth, cJam and Jelly. What are some useful tips for golfing in MATL? (As always, one tip per answer, please!) For the record, MATL can be te...

Gotta eat the bytes like groceries A word is said to be edible if the sum of the decimal values of each of its constituent byte is a prime number. For instance, edible is an edible word because 101 + 100 + 105 + 98 + 108 + 101 = 613, which is a prime number. EDIBLE is also an edible word, since...

Introduction Chad Gadya is a famous cumulative song in Aramaic and Hebrew, sung in cumulation of the sedder. The lyrics can be found, e.g., here (blue text). The challenge is to write a program, in any programming language, that produces the song, each verse in its own line. The program takes n...