Can the Swordfish strategy be used to solve this puzzle

I don't think you have s Swordfish there actually. They do seem to be very rare.

When I look for a X Wing or Swordfish I look for arrangements of a possible symbol arranged in a box. The key is seeing two in a row or column. In the X-Wing they form the corners of a box in the Swordfish there are three pairs forming two overlapping boxes. At a quick glance I can't spot the '1' s in your puzzle forming a box there seem to be three possible positions in the rows and columns.

Any comments ? Click here to contribute

I can't see an easy solution strategy. There are quite a few straightforward squares to solve but it then reaches a stage when nothing can be easily solved. For example 5 must go in Aa as there are no other places a 5 can go in block Aa.

I think I'd need to do a trial and error strategy to solve it.

Good luck

Any comments ? Click here to contribute

If you look at a full "Pencilmark matrix" for this puzzle, you will see that there are two cells in row E that are mandated. Cell Ed is a 6 and cell Ef is a 4. With that knowledge, you can easily solve all of Row E.

Following that, other cells are mandated. Chasing down the chains gives you a total of 48 of 81 cells solved.

You now have a 7,6 twin in the top center sector in cells Ae and Be. Place a 6 in cell Ae and the solution just falls out.

Any comments ? Click here to contribute