Nothing original, but a few links.
Below, continuing the story of day 1, I’ve collected some thoughts on the rest of the WPC in Bulgaria. And as before, failed to cut down the length.
Here’s another WPC practice puzzle, a Magic Summer from the round of puzzles with different areas, just like the recent Different Tapa.
While on the topic of WPC puzzles: There’s a WPC series starting today on croco-puzzle. It’s authored by Silke and me, with a selection of puzzle types from Sofia. These are all “Ü2”, so you can solve them with no Java applet worries.
Rules Place digits in some cells, so that each row and column contains exactly digits 1 through 5.
Connected blocks of digits in a row or column form numbers by reading left to right or downwards, respectively. Clues outside the grid are equal to the sum of all such numbers within the corresponding row or column.
In addition, the gray cells must all have different content.
Here’s a practice puzzle that I made for the color-themed team round at the WPC. Some of the intended logic may have been lost in getting it correct, but enjoy nonetheless.
Rules Place some red, green and blue light bulbs. These shine in vertical and horizontal direction until they hit a black cell. Every white cell must be illuminated, and no two bulbs may illuminate each other. Colored clues indicate the composite color of the bulbs that illuminate it: pure red, green or blue, cyan (green+blue), magenta (red+blue) or yellow (red+green).
Or see the WPC instructions.
Maybe Puzzles 