I’ve based this particular cipher on a sliding block puzzle, the initial and final positions of which are displayed below:
Here is the ciphertext:
145, 8, 21, 85, 24, 80, 130, 97, 136, 79, 91, 61, 199, 93, 19, 30, 145, 135, 93, 92, 72, 183, 93, 140, 18, 49, 34, 193, 199, 91, 186, 48, 177, 130, 200, 193, 78, 19, 93, 111, 134, 85, 83, 108, 170, 170, 91, 34, 193, 218, 34, 121, 153, 63, 218, 176, 174, 72, 29, 168, 93, 193, 22, 98, 163, 48, 173, 176, 48, 140, 79, 92, 48, 85, 199, 176, 129, 176, 163, 18, 21, 34, 82, 140, 97, 92, 48, 97, 156, 159, 48, 98, 79, 19, 120, 133, 93, 156, 176, 189, 86, 120, 29, 49, 187, 173, 176, 140, 79, 218, 34, 120, 185, 108, 91, 18, 159, 146, 19, 21, 140, 93, 90, 18, 80, 136, 79, 19, 61, 174, 93, 19, 98, 145, 159, 93, 163, 199, 119, 140, 78, 62, 99, 193, 67, 29, 61, 22, 79, 127, 193, 78, 176, 34, 44, 85, 9, 82, 188, 159, 44, 34, 187, 218, 176, 48, 72, 174, 93, 61, 145, 8, 79, 145, 140, 79, 91, 19, 140, 93, 47, 85, 99, 49, 110, 31, 193, 173, 34, 127, 62, 19, 29, 120, 159, 163, 72, 18, 8, 176, 140, 174, 79, 31, 176, 85, 146, 91, 79, 159, 82, 99, 187, 155, 99, 71, 61, 183, 33, 9, 72, 179, 79, 174, 199, 143, 93, 218, 48, 61, 63, 199, 120, 65, 19, 109, 111, 126, 110, 48, 173, 93, 78, 186, 163, 194
As usual, there is a private solvers’ area, accessible from the usual place.