<b_jonas> slashlearn euclid//Euclid is a short geeky game in which the goal is to do Euclidean compass and straightedge constructions in as few steps as possible. It runs in the browser, found at "http://www.euclidthegame.com/". It was popular among #esoteric regulars in 2016-07.

#!/bin/sh
echo "$1" > /tmp/input.brachylog
(cd ${HACKENV-/hackenv}/interps/brachylog/brachylog/Brachylog-master/src; swipl -g 'run_from_file("/tmp/input.brachylog", _, _), write("
true."), !, halt; write("
false."), !, halt' brachylog.pl)