Tennis¶

This environment is part of the Atari environments. Please read that page first for general information.


Action Space	Discrete(18)
Observation Space	Box(0, 255, (210, 160, 3), uint8)
Import	`gymnasium.make("ALE/Tennis-v5")`

For more Tennis variants with different observation and action spaces, see the variants section.

Description¶

You control the orange player playing against a computer-controlled blue player. The game follows the rules of tennis. The first player to win at least 6 games with a margin of at least two games wins the match. If the score is tied at 6-6, the first player to go 2 games up wins the match.

For a more detailed documentation, see the AtariAge page

Actions¶

Tennis has the action space Discrete(18) with the table below listing the meaning of each action’s meanings. As Tennis uses the full set of actions then specifying full_action_space=True will not modify the action space of the environment if passed to gymnasium.make.

Value	Meaning	Value	Meaning	Value	Meaning
`0`	`NOOP`	`1`	`FIRE`	`2`	`UP`
`3`	`RIGHT`	`4`	`LEFT`	`5`	`DOWN`
`6`	`UPRIGHT`	`7`	`UPLEFT`	`8`	`DOWNRIGHT`
`9`	`DOWNLEFT`	`10`	`UPFIRE`	`11`	`RIGHTFIRE`
`12`	`LEFTFIRE`	`13`	`DOWNFIRE`	`14`	`UPRIGHTFIRE`
`15`	`UPLEFTFIRE`	`16`	`DOWNRIGHTFIRE`	`17`	`DOWNLEFTFIRE`

Observations¶

Atari environments have three possible observation types: "rgb", "grayscale" and "ram".

obs_type="rgb" -> observation_space=Box(0, 255, (210, 160, 3), np.uint8)
obs_type="ram" -> observation_space=Box(0, 255, (128,), np.uint8)
obs_type="grayscale" -> Box(0, 255, (210, 160), np.uint8), a grayscale version of the “rgb” type

See variants section for the type of observation used by each environment id by default.

Rewards¶

The scoring is as per the sport of tennis, played till one set. For a more detailed documentation, see the AtariAge page.

Variants¶

Tennis 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=
Tennis-v0	`"rgb"`	`(2, 5)`	`0.25`
Tennis-ram-v0	`"ram"`	`(2, 5)`	`0.25`
Tennis-ramDeterministic-v0	`"ram"`	`4`	`0.25`
Tennis-ramNoFrameskip-v0	`"ram"`	`1`	`0.25`
TennisDeterministic-v0	`"rgb"`	`4`	`0.25`
TennisNoFrameskip-v0	`"rgb"`	`1`	`0.25`
Tennis-v4	`"rgb"`	`(2, 5)`	`0.0`
Tennis-ram-v4	`"ram"`	`(2, 5)`	`0.0`
Tennis-ramDeterministic-v4	`"ram"`	`4`	`0.0`
Tennis-ramNoFrameskip-v4	`"ram"`	`1`	`0.0`
TennisDeterministic-v4	`"rgb"`	`4`	`0.0`
TennisNoFrameskip-v4	`"rgb"`	`1`	`0.0`
ALE/Tennis-v5	`"rgb"`	`4`	`0.25`
ALE/Tennis-ram-v5	`"ram"`	`4`	`0.25`

Difficulty and modes¶

It is possible to specify various flavors of the environment via the keyword arguments difficulty and mode. 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.

Available Modes	Default Mode	Available Difficulties	Default Difficulty
`[0, 2]`	`0`	`[0, 1, 2, 3]`	`0`

Version History¶

A thorough discussion of the intricate differences between the versions and configurations can be found in the general article on Atari environments.

v5: Stickiness was added back and stochastic frameskipping was removed. The environments are now in the “ALE” namespace.
v4: Stickiness of actions was removed
v0: Initial versions release