The Puzzler's Army Knife PAK-4 is a must have survival gear for every puzzler.
The Swiss army like knife holds five tetromino pieces which can be utilized to
...Plus solve a number of challenges on offer while you're off the road.
The PAK-4 challenges are presented here: https://pak4challenges.blogspot.com.
There are various ways to use the challenge templates:
1. Solve them off screen from the templates presented.
2. Print the challenge images and solve them on the paper template after adjusting the scale.
3. Directly use the display of your phone or tablet as a template. Use pinch to scale. (See photo).
