Menyhárt, LászlóZsakó, László2024-07-302024-07-302021-03-18Teaching Mathematics and Computer Science, Vol. 18 No. 2 (2020) , 107-1201589-7389https://hdl.handle.net/2437/378508This article has been written for informatics teachers who want to issue back-track based tasks on their lessons or as homework or on competitions. We present a few methods to generate a more complicated problem from a simpler task, which will be more complex, and its solution needs a good idea or trick. Starting from an example, we lead the reader through increasingly di cult task variations. Subject Classification: 97P50application/pdfeducationtaskvariationbacktrackfolyóiratcikkOpen AccessLászló Menyhárt, László Zsakóhttps://doi.org/10.5485/TMCS.2020.0511Teaching Mathematics and Computer Science218Teach. Math. Comp. Sci.2676-8364