
8/16 H walkthrough
I'm not 100% convinced this is the most efficient way to tackle this puzzle especially the bits involving 0-2 and 1-1.
Preplacement, let's work out the orientations of the pieces, which is possible as no single piece add up to 9. I also labelled them to make it easier to reference: https://ibb.co/rDz12wg
- >!5-5 has three possible locations: =, d, f!<
- >!5-6 has two possible locations: d, f!<
- >!as we can see, if 5-5 is anywhere but the =, the teal 9 becomes invalid because 5+5>9. For example, if 5-5 is in d, then 5-6 must be in f, we'll end up with either two 5s or 5 and 6 in the 3c9. The 5-5 must be in the = area.!<
- >!now let's examine 0-2, 1-1 and 1-2.!<
- >! 1-2 can be in c, g, j!<
- >!0-2 can be in c, g.!<
- >!1-1 can be in c, g.!<
- >!Conclusion: 1-2 must be in j, otherwise, we'd have a piece that cannot be placed.!<
- >!4-4 can fit in either b or f, but for f, it needs a 3-5 to make the 9, we have no such piece, so it's fated for b!<
- >!Although we have three 3s, two are bound in the same domino, so only e and k can contain 3s.!<
- >!The purple 9 at the top of the K has to be 4+5, but there no 2-4 or 2-5, which means the bottom tile of the blue 2 area is either 1 or 2, not 0.!<
- >!Keeping in mind no 3s, we know one of the digits in the the 3c9 is a 5 or 6, and another is 0 or 1, we can do a quick calculation of the possibilities and come up with 1+2+6 or 0+4+5.!<
- >!Let's rule out 0+4+5. We have just 0-4 and 1-4 left, if placed in f, 0 and 1 are too low to make the orange 9.!<
- >!c is 1-1, and 0-2 is forced to g!<
- >!only 2 left is 2-6, it has to go to f, 3-3 is forced to e!<
- >!1-5 to a!<
- >!0-4 is forced to i!<
- >!0-5, the only piece with >4, goes to h!<
- >!1-4 and 3-4 go to the unlabeled areas!<
edit: more clarifications.