Tim created another superb solution. The highlights are an elegant center of square's determination using ndgrid. The crux of his method is a convolution for each square not using "same" with an interesting centroid kernel. The comparison between all square convolutions for all rotations utilizes a concise norm metric function. The method should work on non-binary images. The best six matches from the 180x180 upper triangle error array are handily converted into the output format. Thank You Tim for this elegant solution.
Find the longest sequence of 1's in a binary sequence.
given 3 sides, find area of this triangle
Chezz_020 Pawn Attack and Slaying King
GJam 2017 Kickstart: Leader (Large)
BattleShip - Petty Officer (Level 2)
GJam March 2016 IOW: Passwords and the Block Set
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