This is for if you really get stuck at any point.

The solution is given in 19 stages and the

board shapes are given names for reference.

Here goes!.

- 1 goes in the 1-block (of course)
- 5 goes in the very centre square as any other number would make the Short-L impossible.
- 5 goes in the bottom square of the Top-Y, any other number blocks the Long-L squares.
**This needs some thought.**The square in the Bottom-Y just below the centre 5 must be a 4. It obviously can’t be a 5 and 1,2 or 3 would block out most of the Bottom-Z and force the square at right end of the Bottom-Z to be 1,2 or 3. This can’t be because 1,2 or 3 would make the 3-block inpossible. So to sum up, the square in the Bottom-Y just below the centre 5 must be a 4.- This means the square at the right end of the Bottom-Z must be 4.
- This leaves only one squre free in th Long-L for number 4.
- One of the top three squares of the Short-L must be 4 and one of the two left squares of the Top-Y must be a 4. The two 4’s have only two spaces where they won’t clash so you can enter both in.
- The Top-Z has only one square free for 4 at bottom left. 2 must be next to it so as not to make the 2-block impossible. For the same reason the 1 must be in the top right of the Top-Z. This is where you should be so far.
- The Bottom-Y has only one square free for 2. And 1 must go in next to the 4.
- 1 must go at the right end of the Short-L and 2 next to it and 3 in the last square of the Short-L.
- In the Top-Z. 3 must go next to the 1 and 5 below the 3.
- In the Bottom-Y, 3 must go at the left end and 5 next to it.
- In the top left 2-block, 2 goes at the top and 1 below it.
- In the top-Y, the only place for 1 is at the right end, 2 next to it and 3 at the left end. You should be here at this point.
- In the Long-L, 1 must go at the right end, 2 next left and 3 next left again.
- In the 3-block, the top square cannot be 1 or 2 so must be 3.
- This needs some thought. In the Bottom-Z, the square to the left of 4 cannot be 2, 3 or 5 so it must be 1.
- In the 3-block, 1 must be in the corner and 2 to the left.
- In the Bottom-Z, 2 can only be in the centre of the row of three blanks, 5 to the right and 3 to the left.

And there you have it. Simple?