Tips for solving your puzzle:
1. Do not give up at the first hurdle. You will geniunely feel happy with yourself if you are able to solve these on your own.
2. Place your biggest, most oddly shaped piece (usually an anchor, but if it's a cross, unless you have the one-piece barrel, beware of placing it in a corner) flat against whichever side it can go against. If you have two, you can put then both in:
For example:
Then fit your other pieces around them. If your first attempt doesn't work, just jiggle them but one or two spaces and try again. I used this technique and have been able to solve nearly every puzzle that I have seen.
If you have three anchors, one will HAVE to be fitted around another, because there just isn't room otherwise - these are the hardest puzzles.
If your most oddly shaped piece is a ropey-style one, place it in the middle of the bottom of the board and work from there. Again, you may need to go back and wriggle it a little.
3. Have a rest! I promise you, if you have been looking at it for half an hour, your eyes will be blurred and your brain will have shut down. Take a five minute break, (even if you just get a drink or something) and then come back. I can pretty much guarentee you will be able to solve the puzzle on your return - fresh eyes!
4. Finally, these puzzles are produces by a computer. They are ALL solvable, and should not take you more than an hour to do all three. If you have spent this time, and still want to abandon ship (!) see if someone else can help you, it's probably an obvious solution that your poor tired eyes are missing
I hope this helps!