Logic Masters Deutschland e.V.

A puzzle for Leap Day, 29.2.2020:

Standard sandwich sudoku rules apply: Put a digit from 1 to 9 in each cell so that every row, column, and 3x3 box contains every digit exactly once. A number next to a row or column gives the sum of all numbers between the 1 and the 9 in that row or column.

In addition, for every 2 in the grid there's a 9 immediately to the right or immediately below the 2, so that the number 29 occurs either horizontally or vertically (or both). The givens show 2 examples of that.

The puzzle is available on Penpa.