Nine Rings

This minigame was part of the Dragon Festival.

Rules
Nine rings are organized in a 3 x 3 layout in which contestants may stand. Each round costs ten tickets. Every five seconds, one ring is randomly chosen as the winner. Players standing in that ring are awarded 25 tickets if it is the center, 40 if it is on the side, or 55 if it is a corner. Standing in an adjacent ring to the winning ring awards fifteen tickets.

Odds
This odds of this game will return 17 for every 18 tickets spent.

9 x -10 = -90 cost center: 4 x 15 + 25 = 85 win side:  3 x 15 + 40 = 85 win corner: 2 x 15 + 55 = 85 win

You gain on average 9.4 tickets per round no matter which square you are on, and you always lose 10.

See also Rings of Fortune for a 4 x 4 variation.