Tuesday, 24 January 2012

Puzzle #90: Heyawake; Twins

This weekend has been a busy one puzzlewise. It was also a good weekend for me. It was the first time I've done as well as I wanted to do. I won the puzzlefountain competition. At the point of writing this, which is Monday evening, ranked 4th for the puzzle marathon at Logic Masters India, while being fastest for 2 of the puzzles. And I had a good showing on the German Sudoku qualifier even though I lost 10-15 minutes at the start trying to figure out why my printer wouldn't print, while eventually finding out I plugged the USB in a non-USB port. In between that I've been having fun with this month's optimisation puzzle at Logic Masters.de. I recommend giving it a go. It's a fun challenge.
As for this puzzle, it's of medium difficulty. I like the twin concept for heyawake like puzzles.

Rules for Heyawake

In this puzzle, every coloured square shares a border with exactly one other coloured square.

1 comment:

  1. After a few hours, finally worked this out with pure logic! Great puzzle, thanks Para! :-)

    The twins are at:

    R12C157, R3C2389, R4C56, R5C349A, R6C1267, R7C45, R89C26, R8C89, R9ACA, RAC3478.

    Simon B. Snow