Completely change the strategy of the age old game of chess with quantum physics!
All Reviews:
Mostly Positive (17) - 76% of the 17 user reviews for this game are positive.
Release Date:
Feb 28, 2017

Sign in to add this item to your wishlist, follow it, or mark it as not interested

Early Access Game

Get instant access and start playing; get involved with this game as it develops.

Note: This Early Access game is not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“Early access will allow players a chance to get their hands dirty with quantum phenomena now, and will help us build a more stable and higher quality finished product. Testing feedback will help us find and squash bugs and refine features, and could lead to the addition of highly desired features.”

Approximately how long will this game be in Early Access?

“The game should be in early access for approximately 2-3 months before it is released.”

How is the full version planned to differ from the Early Access version?

“For the finished product we want to implement a leader board and intelligent matchmaking, social media integration, a personal collection of different chess set styles to show off in online games, and an in game store to acquire new sets.”

What is the current state of the Early Access version?

“The game is currently in an ALPHA state. With early access players will be able to play a working version of the game that includes Offline play (side-by-side or against an admittedly dumb AI), a Tutorial, and Online games against other players. Early access players will gain access to new features as they are added moving toward release, and will receive the full release version. The best way for early access players to learn to play is probably through Online games.

There are bugs. Your participation will help us find and squash them!”

Will the game be priced differently during and after Early Access?

“There is currently no plan to change price as we leave early access, but the addition of new features could change this.”

How are you planning on involving the Community in your development process?

“We have an active Discord server, and we have set up a forum on the website for those who prefer through which we can interact with the community and receive valuable feedback. We will also be active on the Steam discussion boards.”
Read more

Buy Quantum Chess


Recent updates View all (11)

November 18, 2017

Making Progress

Just a quick update. Progress is being made on the C++ version of the engine. We've settled on a significantly different representation for a board superposition that gives us more control over exactly what data needs to be accessed and manipulated throughout the game. We also have access to some pretty cool optimization techniques. Some of the core functionality is already running up to 30 times faster than before.

There is still a good amount to be done though. The representation and basic move functionality are there. Quantum move path calculation and execution is in the works. Next step will be measurement, and then we have to tie the engine into the existing interface, among other things.

Thank you again for the continued support.
-QC Team
6 comments Read more

October 31, 2017

A Very Long Overdue Update

Hey everyone!

First off, I'm extremely sorry for the lack of communication here. We're decently active in the discord channel with updates, but I sometimes forget that not everyone is there. So here is an update.

A while back we posted an update that the AI was able to make quantum moves and that it would be seen in the next patch. This is still true. The AI has been able to make quantum moves for a while now in internal test versions, but it is incredibly slow. At the time it was thought that just some performance optimizations would fix this and we would be able to release the update after a couple of weeks of profiling.

Profiling and optimization did help, but not nearly enough (think 30 seconds to 1 minute per move for complex positions). After a few months of going round and round with optimizing and rethinking and rewriting large parts of the engine structure it has come to a critical point. What the engine really needs is ground up overhaul. Everything from how the board state is represented internally to how move outcomes are calculated needs to be redone and optimized.

To that end I've started a ground up rewrite of the engine side of things in C++. This will give us access to some of the language's innate better performance, and allow us to use a lot of the optimization techniques already developed for other fast Chess engines written in C++. As a nice side effect this will also open the door for running the engine as a standalone which could make a future mobile version easier to implement.

Going forward I'll try to be more diligent about posting updates here.

Thank you everyone for your continued support,
4 comments Read more
See all discussions

Report bugs and leave feedback for this game on the discussion boards

About This Game

Dive into the strange world of quantum mechanics in the game of Quantum Chess, the game you saw in Caltech IQIM's "Anyone Can Quantum" where Paul Rudd beat Stephen Hawking. With the addition of the Quantum Move players can position a single piece in multiple locations on the board at once! This puts a whole new spin on standard chess strategy, and allows everyone to get hands on with quantum phenomena like superposition and entanglement. Play against the computer, or pit your new found mastery against your friends in an Online match.

System Requirements

Mac OS X
SteamOS + Linux
    • OS: 7, 8, 10
    • Processor: 1 GHz
    • Memory: 2 GB RAM
    • Network: Broadband Internet connection
    • Storage: 1 GB available space
    • OS: 7, 8, 10
    • Processor: 2 GHz
    • Memory: 8 GB RAM
    • Network: Broadband Internet connection
    • Storage: 4 GB available space
    • OS: Snow Leopard or better
    • Processor: 1GHz
    • Memory: 2 GB RAM
    • Storage: 1 GB available space
    • OS: Ubuntu or equivalent
    • Processor: 1GHz
    • Memory: 2 GB RAM
    • Storage: 1 GB available space

What Curators Say

1 Curator has reviewed this product. Click here to see them.
Customer reviews
High Volume of Reviews Detected:
Exclude  or  View Only
Review Type

Purchase Type


Date Range
To view reviews within a date range, please click and drag a selection on a graph above or click on a specific bar.

Show graph

Display As:
Review Beta NEW!
When enabled, will sort reviews by new Helpfulness score. Read more about it in the blog post.
Show graph
Hide graph
Review Helpfulness Beta Enabled
There are no more reviews that match the filters set above
Adjust the filters above to see other reviews
Loading reviews...