Stöck Wyys Stich is a digital adaptation of the traditional Swiss card game Jass. It was developed by the studio Optobyte AG, including developers such as Werner Bättig from the canton of Aargau and ETH graduate Matthias Müller. The company is still active today and continues to specialize in digital Jass games.

Stöck Wyys Stich was first released in 1996 as a CD-ROM for PC and Mac. In that same year, it became the best-selling PC game in Switzerland. Since then, it has been continuously developed and expanded – evolving from classic desktop versions into modern mobile applications.

Jass – The Swiss Cult Card Game
Jass is a widely played card game in the Alemannic-speaking regions, especially in Switzerland, where it is considered the national game. It is usually played by four players with a 36-card deck, using either French or German-suited cards depending on the region. The basic principle is simple: players take turns playing cards, and whoever plays the highest card or the strongest trump wins the trick and scores points. Well-known variants include Schieber, Differenzler, Coiffeur, and Molotowjass.

In Switzerland, Jass is deeply rooted in the culture – from casual games among friends to tournaments and organized Jass clubs. Its importance is also reflected in the media: with shows such as “Samschtig-Jass” and “Donnschtig-Jass” on SRF, the card game regularly receives a prominent stage on national television. “Samschtig-Jass” is considered the oldest still-running entertainment show in Europe (since 1967) and one of the most successful TV formats in Switzerland. It is broadcast every second Saturday from 18:45 to 19:20 on SRF 1.

“Stöck Wyys Stich” – The Popular Digital Jass Game
Stöck Wyys Stich could be played on PC and Mac starting in 1996 and worked in the same way as the traditional card game Jass. In addition, the title offered modern features such as a 3D view as well as convenient help and archive functions that improved usability. One of the computer players was voiced by Swiss cabaret artist Beat Schlatter. In its first year alone, the program reportedly sold around 20,000 copies, making it the best-selling PC game in Switzerland at the time. Including later software updates, several hundred thousand copies of the Jass software developed by the studio are said to have been installed in Swiss homes and offices over time.

With the rise of the internet, online Jass also gained popularity: At the beginning of the new millennium, the Swiss provider Bluewin operated a dedicated Jass portal that attracted many young players. User numbers were further boosted by Swiss television, which placed a link to Bluewin on the website of the “Samschtig-Jass” show. In 2007, SRF eventually launched its own online Jass game, developed by Optobyte AG.

“Optobyte AG and the Digitalisation of Jass
The fact that the traditional card game Jass has made the transition into the digital world is often cited as a key reason why it has remained popular to this day (see article by Sebastian Wirz). As early as the 1990s, there was a veritable wave of interest in Jass. A significant factor in this development was that the game successfully adapted to the digital era in various forms. Even under MS-DOS, for example, there was a program for “Differenzler,” in which players try to achieve an exactly predicted score.

Since its founding in 1992, Optobyte AG has brought numerous successful products to the Swiss market. In total, several million software packages have been distributed. Among its best-known developments are the Jass software “Stöck Wyys Stich,” the telephone directories “telinfo” and “Directories CD,” as well as various online Jass games.

In this way, the company has made a significant contribution to ensuring that the traditional Swiss game of Jass has successfully transitioned into the digital future. Today, digital Jass is firmly established: in Switzerland alone, well over 50 million games of Jass are played each year on apps or via the internet.

Jass App
The current Jass app focuses on delivering an authentic yet accessible digital version of the traditional game. A key feature is its flexible gameplay in both portrait and landscape mode, along with different card designs (German and French suited cards). It also includes an integrated hint system that suggests optimal moves, making it especially helpful for beginners. One of its standout elements is the voice output in various Swiss dialects, which creates a particularly local and immersive atmosphere. Despite these features, the app has received mixed reviews in the App Store.