Two columns: same count, different pockets

Two equal column bets cover 24 numbers distributed vertically through the numbered grid. Like two equal dozen bets, a hit profits one unit on a two-unit layout; a full miss loses two units.

Identify the columns on the table

Column one contains 1, 4, 7 and every third number through 34. Column two contains 2, 5, 8 through 35. Column three contains 3, 6, 9 through 36. A column bet goes in the 2-to-1 box at the end of its column. It does not refer to a neighboring sector on the wheel.

Take one unit on columns one and two. Pocket 14 belongs to column two, so that wager returns three units while the other loses. The layout earns one unit. Pocket 15 belongs to the unselected third column, so both bets lose. Zero and 00 belong to none of the three columns.

The full result distribution

On a European wheel, 24 outcomes produce+1 and 13 produce−2. The expected net is −2/37 units per spin. On an American wheel, 24 outcomes produce+1 and 14 produce−2, giving −4/38. Those are expectations for the full two-unit wager.

Two columns and two dozens can settle differently on a particular spin even though their result distributions match. Pocket 24 wins a first-plus-second-dozen layout but loses first-plus-second-columns. That distinction matters in a matched-spin comparison: equal probabilities do not make every individual outcome identical.

Keep coverage and staking separate

A preset can keep these two columns fixed, switch columns after a miss, or change the amount per column. Those are separate instructions. Write each one down before comparing a session. An outcome-driven switch cannot know which pocket will land next on a fair wheel.

The audited native Two columns preset uses equal bets on columns one and two. The bet builder can help inspect combined wagers. For a layout that overlaps a column with a color, read the 3/2 system and compare all its net-result classes.