Definition
A cancellation staking system using a sequence of numbers; the stake is the sum of the first and last number in the sequence.
Example
Start with 1-2-3-4; stake 5 (1+4). A win cancels the outer numbers; a loss adds the stake to the end.
Labouchere System
A cancellation staking system using a sequence of numbers; the stake is the sum of the first and last number in the sequence.