[HN Gopher] Show HN: Unflip - a puzzle game about XOR patterns o...
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       Show HN: Unflip - a puzzle game about XOR patterns of squares
        
       Author : bogdanoff_2
       Score  : 27 points
       Date   : 2025-11-11 18:36 UTC (4 days ago)
        
 (HTM) web link (unflipgame.com)
 (TXT) w3m dump (unflipgame.com)
        
       | BoppreH wrote:
       | Very nice and satisfying, but I would suggest ramping up the
       | difficulty a little faster. I got until lvl 15 by just flipping
       | the obvious areas, taking no more than 2 seconds. It's otherwise
       | very cool and minimalist.
       | 
       | Edit: limiting it to square flips was a _great_ idea. There are
       | just enough moves to make the answer non-obvious (after lvl 15),
       | but not so many possible moves that you get overwhelmed.
       | 
       | ---
       | 
       | Edit 2: I just remembered I made a similar "game"[1], where you
       | select columns to XOR with other columns and try to reach the
       | target pattern. Use the scroll wheel and shift+wheel to change
       | the pattern and size.
       | 
       | That was actually part of a real research project in optimizing
       | circuits for computing binary finite fields, where the "game" was
       | a sandbox to try different algorithms. The best algorithm was
       | actually found by someone playing in this sandbox and coming up
       | with an efficient strategy.
       | 
       | [1] https://boppreh.com/source/playreduce/
        
       | stephenlf wrote:
       | Love it. The "par" value is a huge hint. You might consider
       | hiding it
        
       | martin_balsam wrote:
       | I agree the ramp up is a bit slow, but I love the concept, and
       | the interface. I am stuck at level 26
       | 
       | edit: found a way to solve it in 6, but not in 4
        
       | stephenlf wrote:
       | Level 24. I took a natural approach (pull each corner to the
       | center) and got a rather unfortunate picture
       | 
       | ---
       | 
       | Edit: and the right answer was so obvious, too
        
       | snowfield wrote:
       | Played until 27. All the levels were pretty easy, 15-30 seconds
       | per level. Mainly because of the "par" feature
        
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       (page generated 2025-11-15 23:00 UTC)