But, here’s a practice puzzle for the coming German GP round next weekend. It’s on the hard side — I’d be interested to hear if you find (a way around) the intended break-in.
Rules Shade some cells, and fill the remaining cells with digits from 0 to 6, such that no digit occurs more than once in each row or column. The numbers outside the grid indicate the sums of blocks of connected digits in the correct order. This includes single digits.