Import a game session, split it into individual plays, and queue solver analysis for each imported result. This guide reflects the current file-first import flow on `/gto/import`.

## Prerequisites

- A Mieza account with access to session analysis
- A game history file in a [supported format](/docs/2-supported-formats)

## Step-by-Step Guide

### 1. Navigate to the Import Page

From your dashboard, click **Upload Session** on the plays list, or go directly to [mieza.ai/gto/import](https://mieza.ai/gto/import).

### 2. Drop or Browse Your File

Drop a supported file onto the page or click to browse from your device. The page accepts the file first, then determines which importer to use from the file extension.

### 3. Confirm the Format if Needed

Most extensions map to a single importer and continue automatically. If the extension is ambiguous, the page will ask you to confirm the format before upload continues.

- **PokerStars Hand History** — `.hh` and some `.txt` files
- **Open Hand History (OHH)** — `.ohh` and `.json`
- **Tic-Tac-Toe Notation** — `.ttt` and some `.txt` files
- **GNv1 EDN** — `.edn`

### 4. Review Import Progress

After upload starts, the page moves through three stages:

1. **Uploading file** — the source file is being sent to the import pipeline
2. **Splitting file into plays** — the system is identifying individual games inside the upload
3. **Importing plays** — each play is stored independently and queued for solver analysis

Files containing multiple games are split automatically. If one play fails, the successful ones still import.

### 5. Open Imported Plays

When the import completes, the page shows a summary and links to the imported plays. For single-play imports, it can take you straight to the first imported play.

### What Happens Next

Import completion means the plays were stored successfully. Solver analysis continues afterward in the background. As results become ready, you'll be able to:

- View each imported play in your plays list
- See optimal strategies computed by our solver at every decision point
- Compare your actual play against the game-theoretically optimal strategy

See [Understanding Your Game Analysis](/docs/3-viewing-analysis) for a guide to interpreting the results.

## Tips

- **Large files are fine.** We handle files with hundreds of hands efficiently.
- **Multi-hand files are split automatically.** A PokerStars history file with 50 hands becomes 50 individual plays.
- **Errors are isolated.** If one hand in a file fails to parse, the others still succeed.
- **Re-upload is safe.** Each upload creates new plays — it won't duplicate existing ones.