Hollandish Roulette Strategy

Three-spin block rule

Use one even-money stake for all three spins in a block. After a net-negative block, increase that stake by two; after a profitable block, reset it to one. A reset after each win would interrupt the three-spin block and therefore describes a different progressionstrategyProgressionAny rule that changes the stake based on previous results. Negative progressions raise it after losses, positive after wins.Read full →.

Block progression table

Ignoring special zerowheelZeroThe single green pocket that no even-money, dozen or column bet covers; the source of the house edge. Also: single zero, 0.Read full → rules, each three-spin block has a positive or negative net result because it contains an odd number of even-money outcomes.

Worked example

Stake 1 on redbetRedEven-money bet on the 18 red numbers. French: rouge.Read full → for three spins. Two losses and one win make the block −1, so the next three spins use stake 3. If that 3-unitmoneyUnitThe base stake a system or a player works in. Progressions are described in units so they apply at any table.Read full → block has two wins and one loss, it nets +3, so the following block returns to 1. A zero is normally a loss on a standard even-money roulette bet, so it belongs in the losing side of this accounting.

Cost and risk

A fully losing first block costs 3 units. If the second fully losing block uses 3 per spin, the total drawdownmoneyDrawdownThe fall from a bankroll peak to a later low within a session. Maximum drawdown is the largest such fall.Read full → becomes 12; after a fully losing 5-unit block it is 27. The sequence grows linearly rather than exponentially, but it still raises the amount exposed while behind. Dividing play into blocks does not change independent spinsmathIndependent spinsEach spin has the same probabilities regardless of history. The basis for every calculation on this site.Read full → or the 1/37 expected lossmathExpected lossExpected value times total amount wagered; the average amount lost over a session or a period.Read full → per European unit staked.

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