Dr. Goetz Schwandtner's Homepage

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Hi! I am Goetz Schwandtner, a mathematician and computer scientist from Mainz, Germany. As mathematician and computer scientist I am fascinated in all kinds of mechanical puzzles. Browse my collection including some very interesting and exceptional puzzles in my puzzle gallery Extremely Puzzling! If you are interested in computers and old software, you will find some of my past projects, most of them on legacy platforms no longer supported. One of my first computers was a Casio FX-880P, for which some nice programs I present here. Last but not least, there are some pictures of some 1:87 scale model buses I built (or modded) many years ago: Model bus gallery.

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Publications:

• Diploma Thesis: Multiple Sequence Alignment - Komplexitätstheoretische Betrachtung und Vergleich von Verfahren (in German), and test data (13 MByte)
• Ph.D. Thesis: Datalog on Infinite Structures
• Puzzle Paper: Some Thoughts on Jean-Claude Constantin's Kugellager Puzzle - a small article I wrote in my free time.
• Puzzle Compendium: Compendium of Chinese-Rings-Like Puzzles - a compendium containing all the puzzles that are related to Chinese Rings, Kugellager, and the so-called "n-ary" puzzles. At DCD33 in Voorburg in 2013 I gave a talk about this compendium, you can find the slides here.
• Articles in Cubism for Fun (CFF): Solving Flexible Meshing Puzzles with BurrTools (CFF114, March 2021), Solving Sjaak's Impossible Sliding Puzzle with BurrTools (CFF115, June 2021)
• Talk at GCD (German Cube Day 2022): Exploring the Exploding Twins Cube

My Puzzle Gallery:

Extremely Puzzling
For my IPP32 Exchange puzzle Acrobat there are now additional challenges available.

Some programming experiments:

Java-Fractals, J2ME-Midlets, Python - PyS60, Casio FX-880P

Model buses:

Gallery

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