Thursday, 8 September 2016

no computers - Square Spin #1: Sun and Moon



Defining Square Spin




Lets play a game!


The aim of this game is to transform one image into another using the least amount of moves possible. Here is what a move consists of:



  1. You get to pick a square of any size in the grid.


  2. You then get to rotate the square around its midpoint as much as you want as long as it fits back into the grid.

  3. This is where your move terminates and the resulting image can no longer be modified unless you take another turn.


Here is an example of two valid moves Transforming what looks like a plus into a weird F



Problem #1: Sun and Moon




I'm a little tired after defining the game and it's too bright outside for me to have a nap, can you make it nighttime for me?


Can you please get rid of this sun and replace it with a moon


Get a 7x7 grid to work with here



Hint 1



What is the main difference between the sun and moon? Is it possible to 'fix' this in a few moves?



Hint 2



Your approach to hint 1 should leave you with a straightforward path to the answer. It will be clear that the answer is only a few moves away and the pieces should fall into place!




Answer





6 (and this is the first time I've run into not hitting the character minimum on an answer)

enter image description here



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