Logic Masters Deutschland e.V.

Masyu: Draw a non-intersecting loop that moves orthogonally through the centers of some cells and passes through every circle. The loop must turn on black circles and travel straight through the cells on either side. The loop must go straight through white circles, and turn in at least one of the cells on either side. Question marks in the 6x6 portion of the grid represent these circles and their nature must be determined by the solver.

Sudoku: Place the digits 1-6 in the 6x6 portion of the grid so that no digit repeats in their row or column.

Japanese Sums: Shade some cells in accordance with the following rules. The digits outisde the grid are "Japanese Sums" clues. A number indicates the sum of the digits in a consecutive set of unshaded cells. The clues are given in the right order. A single '?' represents a single digit from 1 to 9. '??' represents some number which is greater than 9. '*' represents any number of consecutive cells with arbitrary sums including no unshaded cells at all. Every consecutive set of unshaded cells is accounted for by Japanese Sum clues. Additionally, any unshaded cells visited by the Masyu loop are worth double their value, and any unshaded cells not visited by the loop are worth half their value.