Psellos
Contemporary Development With Functional Programming

The Schnapsen Log

September 21, 2012

Only Minds Infer

Martin Tompa

It’s Thursday evening and, to no one’s surprise, you can be found at your card club, The Black Eagle, playing Schnapsen with the locals. Right now you are facing the flamboyant and clever milliner Katharina, sporting another of her outlandish creations. Feathers sprout all over it, in colors and patterns that were never seen on any tropical bird. Between sneezes and surpressed laughter, you get to the following position.

Unseen cards:
Q
KQ
♣ —
ATQ

Your cards:
TK
ATJ
♣ —

Trump: J
Stock: 1 face-down card
Game points: Katharina 4, You 7
Trick points: Katharina 19, You 28
On lead: Katharina

At this point Katharina tickles her cards with two feather tips, as though they help her choose a card, and leads Q. What is your plan? When you think you have a good one, you are welcome to read my analysis.

© 2012 Martin Tompa. All rights reserved.


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About the Author

Martin Tompa

Martin Tompa (tompa@psellos.com)

I am a Professor of Computer Science & Engineering at the University of Washington, where I teach discrete mathematics, logic, probability, design and analysis of algorithms, and other related courses. I have always loved playing games. Games are great tools for learning to think logically but, more important, seem to me an integral part of happy family or social life. I will be delighted if game-players, parents, teachers, and students find this series fun and useful.

My excitement about Schnapsen was rekindled by playing against an iPhone program called Master Schnapsen/66 written by two friends at Psellos. Set to play at its “Master” level of difficulty, this program is one of the two most formidable opponents I have found. It comes up with surprising and brilliant plays, and I have learned an enormous amount of Schnapsen strategy by playing with it. Nearly every deal in this Schnapsen Log arose during those hours of playing with Master Schnapsen/66.

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April
Homework on Expected Values, Apr 26
Rags and Riches, Apr 13
March
How Much Do You Trust to Chance?, Mar 27
A Multitude of Options, Mar 12
To the Brave Go the Spoils, Mar 7
February
Where's the Endplay?, Feb 26

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