---
title: "Hex (19×19)"
slug: 19x19
board: "19×19 rhombus"
players: "2"
parent: hex
order: 5
win: "Connect opposite edges"
special: "Maximum standard size. 361 cells. Marathon-length games."
engine:
  topology:
    type: hex
    shape: rhombus
    rows: 19
    cols: 19
  render:
    cellSize: 12
  players: [black, white]
  setup: ""
---

## Hex (19×19)

{{svg:19x19-board.svg "Hex (19×19) — maximum standard size"}}

The largest standard board size with 361 cells (matching Go's 19×19 intersection count). Games can run well over an hour and develop extraordinary complexity. Rarely used in competitive play due to time constraints, but available for those seeking maximum strategic depth.

### Differences from Standard

Same rules as 11×11 Hex (including swap rule). At this scale, local fights can be completely independent of each other for long stretches, and whole-board reading becomes impractical without deep experience. The swap rule is less decisive since even strong-looking openings leave vast unexplored territory.