Cemetech Contest #15, Challenge 4
Published by KermMartian 4 years, 9 months ago (2016-01-05T16:31:43+00:00) | Discuss this article

Cemetech Contest #15 has been running for three weeks now, collecting entries from around the community and written in a variety of computer and calculator programming languages. The second-to-last challenge is here, and I think it's one that you guys will have fun with. Instead of providing a ciphertext for Challenge 4, we are providing a 95x63-pixel monochrome image (of an Enigma machine!) in three formats: .8xi, .8ci, and .png. Solutions must take at least one of those formats and produce a plaintext (not image) output from the image. Programmers working on the color calculators can assume that any .8ci passed to the program will also only have black and white pixels in the top-left 95x63 pixels of the image, and those writing computer programs should only look at the top 95x63 pixels of any image passed to the program. As with the previous challenge, we will publish a clue on Friday afternoon at 5pm ET, but we encourage you to try to solve it before Friday to earn maximum points.

Challenge 4:

Contest #15, Challenge 4 input image (PNG)
Contest #15, Challenge 4 input image (8xi)
Contest #15, Challenge 4 input image (8ci)

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