Johan Wästlund

Tuesday, June 11, 2019

The double-flag chess clock, a timer for games with reversible moves

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A new type of chess clock could improve the game. By allowing bonus time only in order to play for a draw, we can avoid meaningless time scr...
Friday, April 5, 2019

Which number is hardest to guess?

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I finally figured out how to compute the "devil's distribution", a probability distribution that produces a random positive in...
Monday, March 11, 2019

Primtal och siffermönster

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Euklides kunde bevisa redan för 2300 år sedan att det finns oändligt många primtal. Med tiden har jag kommit att tycka att det mest fasciner...
Monday, February 11, 2019

Kan man föreställa sig tre dimensioner?

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Jag som är utbildad matematiker ska väl inte bli förvånad över det här med längdskala, areaskala, och volymskala. En ar är 10 meter i kvadr...
Wednesday, February 6, 2019

Card play with a unicellular brain

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In an earlier blog post I described the simplest shedding game I can think of. I called it Shed  and it's perhaps more of a mathematic...
Monday, January 28, 2019

Devil’s Roulette – Maximum Surprise Expected!

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"Here is the wisdom. Let him that hath understanding count the number of the wild beast: for it is the number of a game; and its nu...
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Johan Wästlund
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