← All case studies · Charles Wells biography
Historical account · 1891
A famous phrase describes a table’s reserve, not the disappearance of the house edge.
What happened
Quinn’s account places Wells’ celebrated visits in 1891 and explains the table-reserve meaning of “breaking the bank.” It also says the success has not been satisfactorily explained.
The historian’s account gives context to a famous episode. It is not a complete record of every stake, spin and payout from which we can calculate Wells’ actual strategy. A memorable result should not be used to fill those gaps with a fabricated system.
What the case teaches
Consider an unrelated table reserve of $10,000. A sufficiently large sequence of payouts can exhaust that reserve even though the game still has the same long-run probabilities. Replenishing the reserve changes the available cash, not the probability of the next spin. A temporary liquidity event and a mathematical advantage answer different questions. The hypothetical reserve here is not a claim about Wells’ actual table.
Did Wells bankrupt the entire Monte Carlo casino?
“Breaking the bank” referred to a table’s cash reserve. It should not be read as the bankruptcy of the casino.
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Sources
Source pages checked 5 October 2026. Historical results refer to the dates stated; examples marked hypothetical are Casino101 calculations.
