The 24+8 roulette system, and why 32 is not 37

Three units on each of two dozens, one unit on each of two corners in the third dozen. Which dozens and which corners is up to you; the arithmetic does not care. The two corners should not overlap, or you cover 7 numbers instead of 8 and one of them pays double, which changes the pattern of returns without improving them.

Common choices: dozens 1 and 2 with corners in the third dozen such as 26-27-29-30 and 32-33-35-36. That leaves 0, 25, 28, 31 and 34 uncovered. Any other non-overlapping pair of corners leaves zero plus four other numbers.

Across 37 spins on average: 32 hits at +1 unit, 5 misses at −8 units. Won 32, lost 40, net −8 on 296 staked. 2.70%. There is no arrangement of the chips that changes that total, because every chip is a standard bet at the standard payout.

Covering 86% of the wheel sounds like most of the money. It is most of the spins. The money is decided by the size of the loss on the other 14%, and eight units against one unit is exactly the ratio that makes the two columns cancel to the house edge. Any layout that covers more numbers pays less per hit by precisely the amount needed to keep 2.70% in place. That is not a flaw in 24+8; it is how roulette payouts are built.

The stake never escalates, so the worst spin is always eight units. A bankroll of 40 to 60 units covers the ordinary run of misses over a 100-spin session. In pounds at a £1 unit: £40 to £60, for £800 through the table and about £22 expected loss. Clusters of misses happen; three in a row is a 0.25% event per starting spin but turns up often enough across a long evening.

James Bond covers 25 numbers with 20 units and loses 20 on a miss; it misses a third of the time. Two dozens alone cover 24 with 2 units and lose both one spin in three. Three columns with different weights can cover 36 numbers and lose only on zero, netting almost nothing on a hit. All of them are the same price. 24+8 sits at the high-coverage, low-payout end, which suits players who want to be paid often and can absorb eight units when they are not.

Do not change the unit after a loss. The layout is flat by design; the moment it becomes a progression it inherits every problem the progressions have, with eight units at the base instead of one.