These Jupiter guys are great at making Picross/pixel puzzle games and it shows. They automatically crossed off the middle "1" of the 1-1-3 row because I could know, with this arrangement of Xs, that had to be the middle 1 because the chunk of blocks to the right of it HAD to be part of the 3 and ther was no room for this block to be anything but the middle 1 and not the first 1.