Logic Masters Deutschland e.V.

This puzzle was set for round 1 of the first Skunkworks League competition season hosted by damasosos92, in which participants get a few weeks to set a puzzle per round. For this round, the lines and inside of the grid were given, and participants were forbidden from modifying the interior of the grid (other than given digits) as well as placing any extra lines.

Rules :

- Normal sudoku rules apply : place the digits 1-9 once in each row, column, and 3x3 box.

- Equal sum lines : all lines in the grid have the same sum. Digits may repeat on a line if allowed by other rules.

- X-sums : Black clues outside the grid give the sum of the first X digits in the corresponding row/column, where X is the first digit seen by the clue. Red clues apply the same principle but on the diagonal indicated by the little arrow (and digits may repeat therefore on the diagonal if allowed by other rules).

- "Y" represents a number that has to be determined by the solver.

Sudokupad link : Sudokupad