Stack.bet grades each placement as Perfect, Great, Good, Okay, Sloppy, or Miss. The grade comes from the authoritative placement offset calculated by the game service. It can change the bust chance for that attempt and the pressure carried into a later tile, but no grade guarantees that a placement will survive.
Who determines the placement grade
The player sends an intent to place the next tile using a pointer or keyboard. The command identifies the round and next tile; it does not get to declare the grade, survival result, or bust outcome. The game service evaluates that intent against the authoritative tile motion, calculates the absolute placement offset, and passes that offset into the game engine.
The engine then compares the calculated offset with the active grade thresholds. This keeps the grade and settlement inputs on the authoritative game path instead of accepting a browser-supplied result.
The current placement-grade scale
The table below shows the standard public configuration reviewed for this article. The offset is an internal engine value. It is not a percentage of the screen, a pixel distance, or a promise that two different device layouts will expose identical visual measurements.
Grade | Maximum engine offset | Pressure added to this attempt | Pressure carried from zero after survival |
|---|---|---|---|
Perfect | 0.05000000 | 0 percentage points | 0 percentage points |
Great | 0.15000000 | 2 percentage points | 1 percentage point |
Good | 0.30000000 | 5 percentage points | 2.5 percentage points |
Okay | 0.50000000 | 10 percentage points | 5 percentage points |
Sloppy | 0.80000000 | 18 percentage points | 9 percentage points |
The thresholds are upper bounds: the first matching grade is used. An offset beyond the Sloppy threshold is a Miss. The active configuration can change, so these values must be reviewed with the article whenever the game rules change.
How placement pressure changes bust risk
For a non-Miss attempt, the engine begins with the configured base bust chance for that tile. It adds any pressure carried from earlier survived placements and the addition for the new grade. The current engine caps the combined bust chance at 95% and caps carried placement pressure at 20 percentage points.
Attempt bust chance = base bust chance + carried pressure + current grade addition
Maximum attempt bust chance = 95%
Maximum carried placement pressure = 20 percentage points
Placement pressure and base house edge are different concepts. A Good placement adding five percentage points of pressure does not mean the game has gained a 5% house edge. The base probability, current placement, previous placements, and generated bust value are separate parts of the round calculation.
A level 1 example with no carried pressure
Level 1 currently has a base bust chance of approximately 4.7619%. Starting from zero carried pressure, the grade addition produces the following attempt-level examples.
Grade | Base bust chance | Grade addition | Attempt bust chance |
|---|---|---|---|
Perfect | 4.7619% | 0% | 4.7619% |
Great | 4.7619% | 2% | 6.7619% |
Good | 4.7619% | 5% | 9.7619% |
Okay | 4.7619% | 10% | 14.7619% |
Sloppy | 4.7619% | 18% | 22.7619% |
These are calculation examples, not observed win rates or forecasts for a player. Read the separate explanation of base house edge and tile risk for the relationship between a tile’s growth factor and base bust chance.
What pressure remains after a survived placement
If the placement survives, the current configuration applies a 0.5 decay factor to the previous pressure plus the current grade addition. It applies no separate cleanse value. This means half of that combined pressure is carried into the next tile, subject to the 20-percentage-point cap.
Next carried pressure = (previous pressure + current grade addition) × 0.5
For example, suppose 10 percentage points of pressure already exist. A successful Perfect placement adds nothing to the current attempt and leaves 5 percentage points for the next tile. It does not erase the 10 points before the current attempt’s bust calculation. A successful Great placement in the same situation uses the 2-point Great addition and then carries 6 points: (10 + 2) × 0.5.
What a Miss means
A calculated offset beyond the configured Sloppy threshold is graded Miss. The engine requires both a non-Miss grade and a surviving bust roll, so a Miss ends the round even if the separate generated bust value would otherwise have cleared the probability threshold.
Conversely, a non-Miss grade is not an automatic win. Perfect, Great, Good, Okay, and Sloppy placements still face their calculated attempt bust chance. This is why Stack.bet should not be described as a pure-skill or chance-free game.
What placement grades do not prove
A Perfect grade does not guarantee survival or a profitable round.
A grade does not remove base bust risk or the generated chance component.
The grade thresholds are engine offsets, not universal pixel or screen percentages.
Placement pressure is not an additional published house-edge percentage.
One result does not predict the next round or establish a player’s long-term outcome.
Stack.bet involves real-money gambling and the full stake can be lost. Review the game and risk disclosures and use the available responsible-gaming controls before playing.
Methodology and change control
This article was reviewed on against the live public grade configuration, the authoritative placement-intent contract, and the matching game-engine pressure and survival calculations. The worked example uses the current unrounded level 1 base bust chance.
The figures describe the standard public configuration, not independently measured player results. If grade thresholds, pressure additions, decay, caps, placement authority, or the public risk table changes, the examples and last-reviewed date must be updated.