Logic Masters Deutschland e.V.

Introduction:

This puzzle is inspired by Myxo's excellent puzzle Grundriss. Both puzzles are about the rule of Latin Square Jam, but here I added an idea from the famous math problem of Squaring the square, making this puzzle more explorable in geometry.

The title Suufonrenta is a term from the game of Mahjong. It means that 4 players discard the same Wind tile (Fon) consecutively in a round. I named this puzzle because the 4 S-shaped lines can match to 4 Wind tiles, and S is the initial letter of the term as well.

…Sssst! The title also gives a tiniest clue to the recommended solve order. If you consider the left side as “East” … Oops! Too much already! :)

You can click or tap the following image to play. Hope you like it!

Rules:

1. Divide the grid into non-overlapping squares. Squares of the same size do not touch orthogonally, but may share a corner. Each N*N square is a Latin square, with numbers 1 to N appearing exactly once per row and column within it. Numbers separated by a square border must not be equal.

2. Numbers along a slow thermometer must be non-decreasing from the bulb end.

3. The four S-shaped lines are:

(1) Parity line (red, top right), along which numbers alternate between odd and even parity.

(2) Palindrome (yellow, bottom left), where numbers read the same forwards and backwards.

(3) Ten-line (blue, top left), which breaks up into one or more segments, each summing to 10.

(4) Extremum line (green, bottom right), where each number must be either greater or smaller than all its orthogonal neighbours in the same Latin square.