07f1dddf_o_Solve_it___What_is_Strategy___Formal_analogue
[Heuristic] Here is a problem related to yours and solved before [Informal Description] Can you find a problem related to yours that has already been solved and use that to solve your problem? [Formal analogue] 
Pattern recognition Pattern matching Reduction
George Pólya: How to Solve it | What is Strategy?
Formal analogue