Sunday, 17 March 2024

Freddie Hand

Walkthrough for yesterday's FourCells (Mildly Supersized) will be edited in later.

Did you know that Egypt is not the country with the most Pyramids? That title actually goes to Switzerland Sudan, whose Nubian pyramids number over 200, compared to roughly 118 in Egypt. And while we're at it, Toblerone is named after the Toblerone line, which is a 10km row of pyramidal fortifications aimed at stopping tank invasions.

Unfortunately construction of conventional pyramids nowadays is banned since the sharp corner poses a health and safety risk, just as triangular flapjacks have been phased out in schools. Here's the best legal replacement I have, now with far less dangerous vertices.

Rules: Enter a number from 1 to 9 into each empty cell, so that (with the exception of the bottom row) each number is either the sum or the difference of the two numbers directly below it. Within a shaded row, no number can appear more than once. In an unshaded row there must be at least one number appearing more than once.

Acquire a Speedy Sloth 🦥 by solving the puzzle in 4:15 or less!
Obtain a Quick Crab 🦀 by solving the puzzle in 8:45 or less!
And all solvers who complete the puzzle will be rewarded with an Tetrahedral Dusty Tetraka 🐦

Example (Penpa+): https://tinyurl.com/22azy2x7
Puzzle (Penpa+): https://tinyurl.com/2bnp63qa