The ICFP2024 contest was held June29 thru July 1. The contest consisted of five parts: ICFP Language, Lambdaman maze, Starship flying, 3D - graph programming, and Efficiency - processing complex ICFP message to a numerical value.
The Lambdaman 4 maze is medium size,21x21, L near top left, '.' a cheese bit, # is Wall. Matrix uses Wall=0,L=1,Cheese=2. Encircling Walls are added to all mazes.
The contest goal was to write a minimal size, bytes, expression that moves L, Lambdaman, to eat each cheese bit.
Solve these mazes while having a total file size including comments less than 1000.
%Descriptions
%1: Small puzzle 15 moves: UDLLLLDURRRRRURR
%5: Spiral (11,16) L at middle. ICFP best repeated 'LUURRDDRRDLUDDDLLRDDDLLLLULULLURRRRULURU' 27 times
%6: size(1,200) with L at 1,1 199 Rs
%8: Spiral(100,100) L at middle. Counter clockwise starting with D to escape
%9: size(50,50) with L at 1,1
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Last Solution submitted on Jun 05, 2026

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Richard Zapor William Chris Cleveland Christian Schröder

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