Spaces:
Running
Running
| title: Baghchal | |
| emoji: 🐅 | |
| colorFrom: yellow | |
| colorTo: green | |
| sdk: static | |
| pinned: false | |
| license: mit | |
| short_description: Play Baghchal in-browser vs a tablebase-checked engine | |
| # Baghchal — Tigers & Goats | |
| Play the Nepali board game against a real engine. Everything runs **in your browser**: legal-move | |
| generation, the OBX board notation, and the engine ladder from `pebble` (random) up to `phantom` | |
| (PVS + LMR search). | |
| **How strong is `phantom`?** Baghchal is a solved game — it is a draw with best play — so every | |
| move can be checked against the truth. Over 400 sampled positions `phantom` plays a value-optimal | |
| move **90.3%** of the time *on positions where the choice actually matters*: the ones where at | |
| most half the legal moves hold the game value. A uniformly random player scores **20.6%** there. | |
| That qualifier is the whole point. The unrestricted "agreement with perfect play" figure is | |
| **96.0%** for `phantom` — but **64.1%** for a bot playing at random, because in a drawn game | |
| almost any move preserves the draw. Quoting the unrestricted number alone makes a listless engine | |
| look nearly perfect, so both are published here. (Reproduce with `python -m bagh_bench.agreement | |
| --states 400 --time-ms 300 --bots pebble,shepherd,hunter,stalker,phantom,venom`.) | |
| There is no server. This is a *static* Space; the Python engine is CPython compiled to WebAssembly | |
| via [Pyodide](https://pyodide.org), loaded on your first bot move. If Pyodide cannot start, the | |
| board falls back to a lighter JavaScript engine so the game always works. | |
| Set a **Bot API** URL in the side panel to use a hosted engine instead — that is the only way to | |
| reach the *perfect* tablebase bot, which needs an 8.7 GB solved database no browser can hold. | |