WPF Puzzle GP 2018: Round 4 is over

Dear Players,

Puzzle GP Round 4 has ended. You can see the preliminary results here: //gp.worldpuzzle.org/content/preliminary-results-wpf-gp-puzzle-4a
Congratulations to the winner of the round, Ken Endo of Japan!

For cumulative Puzzle GP results, please check here: //gp.worldpuzzle.org/content/wpf-gp-puzzle-results-2018

To revisit past rounds, use the following links:
Round 1: //gp.worldpuzzle.org/content/wpf-puzzle-gp1-3
Round 2: //gp.worldpuzzle.org/content/wpf-puzzle-gp2-3
Round 3: //gp.worldpuzzle.org/content/wpf-puzzle-gp3-3

The next round is scheduled to take place from 1st June to 4th June.