This puzzle was given to my 8 year old from the school. My child was struggling, so I gave it a bash, but was unable. I do sudoku regularly so know most methods of solving. I gave it to my husband and he got to the exact same point as me. Just wondering if this can be solved without guessing in any way?
As a standard sudoku, this puzzle does not have a unique solution. It has 31 possible solutions. This was verified using the Sudoku Solver by Andrew Stuart.
Therefore it cannot be solved in a usual logical way unless the "Kayak" lends another wrinkle to the ruleset.