# RBG — Regular Boardgames

`checked` that it exists and is benchmarked against Ludii; everything else
`unverified`

## What it optimises for

A game description language with **efficient reasoning** as the explicit
goal — the speed axis of the GDL/Ludii tradeoff.

## How a game is defined

A regular-language-based description. `unverified` in detail.

## What it can analyse

`open`. Its published framing is reasoning efficiency, not design support.

## Relevance to clay-borg

**Track A, as the third point on the description-language axis** —
GDL (expressive, slow), Ludii (concise, fast, ludeme-structured), RBG
(speed-first).

**Ludii is reported to describe hidden information and non-deterministic
games with less restriction on the board than RBG.** `checked` — which
matters directly, because GROUND is both hidden-information and
non-deterministic.

## What to steal / avoid

`open` — not enough read to say.

## Open questions

- Everything past the comparison paper. This profile exists so the option
  is not forgotten, not because we have evaluated it.

## Sources

- *Efficient Reasoning in Regular Boardgames*
  (https://arxiv.org/pdf/2006.08295)
- *A note on the empirical comparison of RBG and Ludii*
  (https://arxiv.org/pdf/1910.00309)