Logic Masters Deutschland e.V.

Similar to Deep Indexing, this puzzle uses fog both for cells inside the grid and for outside clues. The outside clues here are "hitpoints" clues. See below for a more in-depth explanation. Thanks to the CtC-discord for testing.

• Normal Sudoku rules apply.
• Fog of War: the grid is covered in fog. Placing correct digits reveals clues in the surrounding 3x3 area.
• Minesweeper (odds): A digit in a circle indicates how many of the (up to 9) surrounding cells in the grid, including itself, are odd.
• Hitpoints: Clues outside the grid give the sum of all cells that contain a digit equal to the distance of that cell from that clue in the row or column.

Hitpoints Deep-Dive

Hitpoints clues are similar to sandwich/X-sums/skyscrapers in the sense that they only care about the contents of their respective row or column. In this puzzle, outside clues are only placed on the left and on the top of the grid. If there is a hitpoint clue in r3c0 with a value of 3, this means that either

• there is a 3 is r3c3 or
• 1 is in r3c1 and 2 is in r3c2.

The 9 in this example could never be on the right of row 3 because it would count towards the hitpoints sum. For clues on the top of the grid, the same applies but digits matching their row numbers are summed instead.

Remark on Minesweeper Clues

The minesweeper clues count themselves but never count the outside clues. So a 3 in a circle has 2 other odd digits around it inside the grid - and it could be surrounded by any number of odd hitpoint clues outside the grid.