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# AIGO Chess

## Introduction

AIGO Chess was invented in 2004 by the president of Beijing Huaqi Information Digital Technology Co., Ltd. It is identical to international chess, but with the addition of four cannon pieces.

## Setup

 ```+---+---+---+---+---+---+---+---+ | r | n | b | q | k | b | n | r | +---+---+---+---+---+---+---+---+ | p | c | p | p | p | p | c | p | +---+---+---+---+---+---+---+---+ | | p | | | | | p | | +---+---+---+---+---+---+---+---+ | | | | | | | | | +---+---+---+---+---+---+---+---+ | | | | | | | | | +---+---+---+---+---+---+---+---+ | | P | | | | | P | | +---+---+---+---+---+---+---+---+ | P | C | P | P | P | P | C | P | +---+---+---+---+---+---+---+---+ | R | N | B | Q | K | B | N | R | +---+---+---+---+---+---+---+---+ ``` C/c = Cannon

## Pieces

As in international chess, except:

The Cannon makes a non-capturing move like a rook. It makes a capturing move like a rook, except that a single piece must stand between the Cannon and the piece it captures.

## Rules

As in international chess. Points of uncertainty:

1. Can pawns promote to Cannon?
2. Can pawns which start on 3rd rank make initial two-square move.

## Notes

Thanks to Michael Howe for pointing out this information.

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