Ring Thirteen

A smaller ring

Thirteen pockets numbered zero to twelve. Six are lit, six are dark, and the zero is neither.

The half-return rule

If the zero comes up, an even-chance cover — lit, dark, even, odd, low or high — gives back half of what was laid rather than all of it.

What is on offer

A single pocket pays eleven to one. There are no thirds or columns here; the ring is too small to divide sensibly, and leaving them out keeps the maths readable.

The even fields

Six wins, six losses and one half-loss out of thirteen. That works out to half a pocket in thirteen, or 3.85 percent — a friendlier figure than the big ring's single-pocket margin would suggest.

The single pocket

Eleven to one on one in thirteen is a different story: twelve pockets against you and eleven paid, which leaves 7.7 percent behind. The wide fields are the good value on this ring.

A ring is a lottery you can see

Every pocket is drawn with the same chance, and the whole apparatus is in front of you. Nothing about a ring game is hidden — which makes it the clearest place to see where a house margin actually comes from.

The margin is one pocket

The rewards are priced as if the extra pocket were not there. On a thirty-seven pocket ring that single difference is 2.70 percent; add a second and it becomes 5.26. Nothing else about the game changes at all.

Every cover is the same

A single number, a colour, a column, a dozen — all of them settle to the same margin on the same ring. Spreading across the table changes how often you are paid and by how much, and leaves the expected result untouched.

Patterns in past results

Recording the last twenty outcomes feels like research and is not. Each turn is independent; a run of one colour carries no information about the next. The board that displays past numbers exists because people want it, not because it predicts anything.