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---
title: Bowling
---
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# Bowling
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```{figure} ../../_static/videos/atari/bowling.gif
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:width: 120px
:name: Bowling
```
This environment is part of the < a href = '..' > Atari environments< / a > . Please read that page first for general information.
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| | |
|---|---|
| Action Space | Discrete(6) |
| Observation Shape | (210, 160, 3) |
| Observation High | 255 |
| Observation Low | 0 |
| Import | `gymnasium.make("ALE/Bowling-v5")` |
For more Bowling variants with different observation and action spaces, see the variants section.
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## Description
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Your goal is to score as many points as possible in the game of Bowling. A game consists of 10 frames and you have two tries per frame. Knocking down all pins on the first try is called a "strike". Knocking down all pins on the second roll is called a "spar". Otherwise, the frame is called "open".
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For a more detailed documentation, see [the AtariAge page ](https://atariage.com/manual_html_page.php?SoftwareID=879 )
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## Actions
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Bowling has the action space `Discrete(6)` with the table below lists the meaning of each action's meanings.
As Bowling uses a reduced set of actions for `v0` , `v4` and `v5` versions of the environment.
To enable all 18 possible actions that can be performed on an Atari 2600, specify `full_action_space=True` during
initialization or by passing `full_action_space=True` to `gymnasium.make` .
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| Value | Meaning |
|---------|------------|
| `0` | `NOOP` |
| `1` | `FIRE` |
| `2` | `UP` |
| `3` | `DOWN` |
| `4` | `UPFIRE` |
| `5` | `DOWNFIRE` |
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## Observations
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Atari environment have two possible observation types, the observation space is listed below.
See variants section for the type of observation used by each environment id.
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- `obs_type="rgb" -> observation_space=Box(0, 255, (210, 160, 3), np.uint8)`
- `obs_type="ram" -> observation_space=Box(0, 255, (128,), np.uint8)`
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Additionally, `obs_type="grayscale"` cause the environment return a grayscale version of the rgb array for observations with the observation space being `Box(0, 255, (210, 160), np.uint8)`
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### Rewards
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You receive points for knocking down pins. The exact score depends on whether you manage a "strike", "spare" or "open"
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frame. Moreover, the points you score for one frame may depend on following frames.
You can score up to 300 points in one game (if you manage to do 12 strikes).
For a more detailed documentation, see [the AtariAge page ](https://atariage.com/manual_html_page.php?SoftwareID=879 ).
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## Variants
Bowling has the following variants of the environment id which have the following differences in observation,
the number of frame-skips and the repeat action probability.
| Env-id | obs_type= | frameskip= | repeat_action_probability= |
|-----------------------------|-------------|--------------|------------------------------|
| Bowling-v0 | `"rgb"` | `(2, 5)` | `0.25` |
| Bowling-ram-v0 | `"ram"` | `(2, 5)` | `0.25` |
| Bowling-ramDeterministic-v0 | `"ram"` | `4` | `0.25` |
| Bowling-ramNoFrameskip-v0 | `"ram"` | `1` | `0.25` |
| BowlingDeterministic-v0 | `"rgb"` | `4` | `0.25` |
| BowlingNoFrameskip-v0 | `"rgb"` | `1` | `0.25` |
| Bowling-v4 | `"rgb"` | `(2, 5)` | `0.0` |
| Bowling-ram-v4 | `"ram"` | `(2, 5)` | `0.0` |
| Bowling-ramDeterministic-v4 | `"ram"` | `4` | `0.0` |
| Bowling-ramNoFrameskip-v4 | `"ram"` | `1` | `0.0` |
| BowlingDeterministic-v4 | `"rgb"` | `4` | `0.0` |
| BowlingNoFrameskip-v4 | `"rgb"` | `1` | `0.0` |
| ALE/Bowling-v5 | `"rgb"` | `4` | `0.25` |
| ALE/Bowling-ram-v5 | `"ram"` | `4` | `0.25` |
## Difficulty and modes
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It is possible to specify various flavors of the environment via the keyword arguments `difficulty` and `mode` .
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A flavor is a combination of a game mode and a difficulty setting. The table below lists the possible difficulty and mode values
along with the default values.
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| Available Modes | Default Mode | Available Difficulties | Default Difficulty |
|-------------------|----------------|--------------------------|----------------------|
| `[0, 2, 4]` | `0` | `[0, 1]` | `0` |
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## Version History
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A thorough discussion of the intricate differences between the versions and configurations can be found in the general article on Atari environments.
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* v5: Stickiness was added back and stochastic frameskipping was removed. The environments are now in the "ALE" namespace.
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* v4: Stickiness of actions was removed
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* v0: Initial versions release
