AI · the RAG game

Play it through first, then take it apart

The basic game uses one small room, one robot and a stack of pages: ten levels to build an intuition for RAG.

The technical topics then take one problem at a time: play it, and read why it happened if you want to.

The basic game Playable

The Paper Room

Ten short levels. Help a small robot take a question, find the right page and hand both to an LLM that writes the reply — from “find that one page” to “answer through relations”. Intuition first; the techniques come later, in the topics below.

The game is in Chinese.

0 of 10 levels cleared

Start level 1

Companion · ReadableThe Paper Room: reproduction notes Every level’s material, actions, evidence verdicts and prewritten replies, step by step.

Levels

Playing in order works best the first time; you can also pick any level. Progress is kept only in this browser.

Technical topics

One problem at a time, each backed by a real, recorded experiment. The topics previewed at the end of the game’s levels are opened up here.

Coming next

02Where to cut the documentChunkingComing soon
03Nobody asks the way the document is writtenQuery rewriteComing soon
04Some words have to match exactlyHybrid searchComing soon
05The first three decide everythingRerankComing soon
06Knowledge bases go staleKnowledge base healthComing soon
07You changed one file and broke another answerVersioning & regressionComing soon
08The answer is not in any single pieceGraphRAGExploring
09Decide what is missing, then search againAgentic RAGExploring

Each of these is an experiment first and a page second. The site’s source, including the experiment code, is not public yet.