Rullo

Nice. With almost every puzzle I try, I almost stop, thinking "This one is too hard", but then I think "Wait ...", and find the one clue that unlocks it.

So far I've only tried 5x5 - that seems plenty hard enough.

Addictive.

Will you like Rullo?

Here's an easy way to tell without even playing:
First, rate your ability to add in your head from 1-10 (10 high)
Second, rate your love of logic puzzles from 1-10 (10 high)
Third, multiply the two numbers together.

Now you have a rating of Rullo, from 1-100.

For me, it's 100.

While this is re-frontpaged, I'd like to point out that the developers have added a very important feature in the mobile (and Kongregate) versions of the game:

Tapping on a sum clue box now shows the current sum next to it.

The mobile app (I tried the Google Play app) has an additional option to enable number flagging, and a button that just turns every number off. Depending on how you puzzle, these may be big features that sway you towards the mobile versions.

When I click on the Google Play link it says it's not available in my country. I'm not running a VPN and am in the States.