Cooperative Chess

When your friends win, you win.
Co-op Chess occurs in rounds, and in each round you must occupy all the "!" squares.
Achieve checkmate for either side and you both win!If you've read this far, you must want some feature detailsCustomizable difficulty
Single-player mode if you want to learn in a safe place (or if that's just your thing)
Avatar customization unlocked by completing achievements
Private games with friends
Quality of life improvements beyond what's normal for Chess apps
Cooperative Chess is part of what has retroactively been termed a "molasses jam" run by the Bay Area Dev Collective. The theme of the jam was to make a violent genre non-violent. Somehow the idea of co-op chess came up during a brainstorming session, and I knew immediately that I had to figure out how to make it work. And now you and a friend get to experience it yourselves.
The other molasses game jam games are also on steam:
https://store.steampowered.com/app/1556660/Shell_Out_Showdown/
https://store.steampowered.com/app/1603590/My_Cousin_the_Rogue/
https://store.steampowered.com/app/1603520/Save_Data/