Breakthrough is the award-winning crown achievement by Dan Troyka. The trivial rules generate a dazzling emergent complexity, studied and envied by many!

Break through!Photo & model by Burlogh

It is rather similar to Ugly Duck, also by Troyka, but lacks the promotion and race back home.

Thanks to its fame there is a fair amount of interesting writing to find about Breakthrough. For example it was (briefly) covered in Addison's book 100 other games to play on a chessboard.

Breakthrough in the bookPhoto by me

Chessicals also implements the Siege variant invented by Chris Huntoon.

External links:

• World of Abstract Games entry
• Board Game Geek entry
• Zillions of Games entry
• Zillions entry for Siege variant
• IG Game Center entry
• Super Duper Games entry
• Wikipedia entry
• Little Golem entry
• Abstract Meanderings entry