WPC 2019/Round 7

Duration: 45 minutes. Total point value: 1800 points. Round winner: JPN-A (Ken Endo, Kota Morinishi, Yuki Kawabe, Hideaki Jo), 2500 points.

Puzzles

An example of an auxiliary puzzle, along with an extraction method.

All puzzles in this round were written by Ulrich Voigt.

This round consists of one very large main puzzle and some auxiliary puzzles. The main puzzle is Worms (Meandering Numbers), valued 1800 points. The main puzzle itself has a unique solution.

Teams can solve auxiliary puzzles to make it easier. The main puzzle has the shape of a map of Germany. Some cells where major cities are located are marked. There is one auxiliary puzzle for each city. Teams can use these auxiliary puzzles to find out which numbers go into the respective cells in the main puzzle.

There are 32 auxiliary puzzles, eight puzzle types with four puzzles each: Easy as 1234 / 12345, Futoshiki, Fuzuli, Hakyuu (Ripple Effect), Kakuro, Mathrax, Top Heavy Number Place (Top Heavy), Trid.

In each auxiliary puzzle, one or several cells are marked with letters. The number in the main puzzle results from the numbers in these marked cells. If there is just one marked cell, this number is transferred into the respective cell of the main puzzle, otherwise, the number in the main puzzle is the result of a simple arithmetic operation, either X = A + B + C or X = A + B − C. Empty cells are treated as a 0.

Partial Scoring

If the main puzzle is completely solved without any mistakes, a team will receive 1800 points. Otherwise, each correctly filled region will yield 20 points.