WIN / FIELD NOTES
An average is not a promise: points, probability and RTP
Calculate an expected point score, distinguish an average from a guarantee, and understand why free game points are not a monetary RTP.
Start with the unit
An expected value is a probability-weighted average of possible results. It is not the score every player receives and does not say when a result will arrive. Before calculating anything, name the unit: points, seconds and money are different quantities. WIN Playground points cannot be exchanged for money.
A worked example from Win Zoo
Each of the five lines pays once for its longest matching run from the left: 2 animals award 50 points, 3 award 300, 4 award 750 and 5 award 1500. For one chosen line, the probabilities of these exact run lengths are 5/36, 5/216, 5/1296 and 1/1296 respectively. A line whose first two animals differ awards zero.
The expected points per line are 50 × 5/36 + 300 × 5/216 + 750 × 5/1296 + 1500 × 1/1296 = 3875/216. Adding five lines gives about 89.70 points per turn, or 896.99 over ten turns. Adding expectations is valid even though the lines share cells. An individual session can finish above or below this average; no score is reserved for the next session.
Why this is not a casino RTP
RTP means return to player and describes a theoretical ratio of returned money to money staked under specified rules. Our free games have no monetary stakes or payouts, so we do not assign them a monetary RTP. Dividing game points by a fictional deposit would mix unrelated units.
For a purely hypothetical game with a stated 96% RTP, a total stake turnover of €100 corresponds to €96 expected returns and €4 expected net loss under that model. It does not promise that a €100 deposit lasts a particular time or that an individual player loses exactly €4. This arithmetic is an explanation, not a recommendation to wager.
Compare observations carefully
Try several Win Zoo sessions and compare the spread of totals. Do not treat a short sample average as a certification of the random generator. A larger sample may be more informative, but no fixed number of sessions guarantees agreement with the theoretical mean.
In Win Curve the stop is sampled uniformly between one and eight seconds, with a theoretical mean of 4.5 seconds. That average does not predict the next stop. Always separate a model, an observation and a guarantee: they are three different things.
Sources and supported claims
WIN rules, scoring and worked game examples are documented by the WinWinWin team from our own implementation. External sources support the general concepts below, not our game-specific numbers or claims of certified randomness.
The expected value of a sum is the sum of expected values, including dependent outcomes. This supports adding the five line expectations in the Zoo example.
Expected value is the sum of outcomes weighted by their probabilities. A long-run mean does not guarantee a short-session result.
RTP describes money returned relative to stakes over many plays, not a guaranteed return in one session. This source explains the term; it does not certify WIN games.
Links checked: 7 November 2026. Sources are in English.
About this guide
Written by the WinWinWin team for the current WIN Playground implementation. These rules describe our own game, not another platform or a real-money product.