Yes, in dominoes, a spinner is inherently a double. A domino designated as a spinner must always be a double.
What is a Spinner in Dominoes?
A spinner is a specific type of double tile in domino games that offers unique playing opportunities. Unlike other dominoes, or even other doubles that are not designated as spinners, a spinner can be played on all four sides. This characteristic makes it a pivotal piece in gameplay, often influencing strategy and the flow of the game.
Key Characteristics of a Spinner
- Always a Double: A fundamental rule for a spinner is that it must be a double domino (e.g., double-six, double-five, double-zero). No non-double domino can ever be a spinner.
- Four-Sided Play: The defining feature of a spinner is its ability to have other dominoes played off all four of its sides (top, bottom, left, and right), extending the "train" of dominoes in multiple directions.
- Rule-Dependent Designation: The rules for which double becomes a spinner can vary depending on the specific domino game being played.
- In some variations, only the first double played in the game (the lead double) is considered the spinner for that entire game.
- In other game variations, every double played throughout the game is treated as a spinner, allowing for multiple points of expansion.
How Spinners Function in Gameplay
The function of a spinner is to create more branches or avenues for play on the domino layout. This ability to play on all four sides differentiates it from other doubles, which, if not acting as a spinner, can typically only be played off two sides, just like any other non-double tile.
Consider the following comparison:
| Feature | Spinner Double | Non-Spinner Double |
|---|---|---|
| Tile Type | Always a double (e.g., 6-6, 5-5) | Always a double (e.g., 6-6, 5-5) |
| Playability | Can be played on all four sides (top, bottom, left, right) | Can be played on only two sides (ends of the train) |
| Game Impact | Creates new branches, opens up more playing options | Extends the single train, does not create new branches |
| Designation | Rule-dependent (first double, or all doubles) | Not designated as a spinner within the ruleset |
The strategic placement and utilization of spinners are crucial in domino games, as they can unlock new scoring opportunities, relieve blocked players, and expand the game board significantly.
