Hi!
You need to explain better than that, first of all, there is no bonus ball, right?
Second, everyone of the 7 positions or rows can have numbers from 1 to 27 such as on a regular lotto game, right?
So then, it is like a pick7 with no bonus ball and they use numbers 1 to 25
It is harder than a pick6, but easier, because they use only 27 balls.
The winning system for that, will be basicaly the same as for any pick5 to pic7 lotto game with no bonus ball.
As somebody who knows how to win any pick5 to pick7 lotto game, and adapt the technique to your game, the only difference will be that your game is a pick7 and uses only 27 balls.
Bye.