Logic Masters Deutschland e.V.

• Place the numbers -2 to 2 once each in every row and column.
• Diagonal Full Rank: Each of the 36 possible diagonal lines across the grid (including each of the four corners, each read from both directions) is read as a 1-to-5-digit number in the balanced quinary numeral system (for example, the number (-2, +1, +2) is interpreted as (-2 * 25) + (+1 * 5) + (+2 * 1), giving a total of -43).
  • Clues outside the grid indicate the "rank" from 1 to 36 formed by reading the indicated diagonal from the direction of the arrow, where higher numbers have higher ranks than lower numbers.
  • If two ranks are tied, the value in both clues is the lower of the two ranks being shared. For example, if the lowest four numbers were (-2, +1, 0, -1, 0), (0, -1, 0, +1, -2), (-1, 0, +1, -2) and (-1, +2, 0, +2), the value of their clues would be (1), (2), (2), (4) respectively.
• Some clues are given as inequalities, ">" meaning "greater than" and "<" meaning "less than."

LINKS:

SudokuPad (for the answer check, enter the absolute value of each digit)

Penpa (no answer check, but has more flexible notation options)