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Richard Selig Réti (1889 – 1929) was an Austro-Hungarian, later Czechoslovakian chess player, chess author, and composer of endgame studies. He was one of the principal proponents of hypermodernism in chess. With the exception of Nimzowitsch's book My System, he is considered to be the movement's foremost literary contributor.

Reti’s Magic

Section: Brain Teasers Category: Chess
Difficulty:

It is White’s move next. Is this game a win for Black or a draw?

The game is a draw. The first two moves of White are Kg7 and Kf6. If Black moves the king twice in the meantime, then White can get to the pawn on the h-file and take it. If Black moves the king once, then White plays Ke5. If Black moves the king again, White can take the pawn on the h-file. Otherwise, White plays Kd6 and can promote his pawn right after Black promotes his. Finally, if after Kg7 and Kf6 Black moves the pawn twice, then White plays Ke7, and once again can promote his pawn right after Black promotes his.

richard-reti
Richard Réti July 25, 2018
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Pierre the Maze Detective in the Last Giant Maze

Section: Casual Puzzles Category: Maze
Difficulty: Tags:

Help Pierre catch the evil Mr X before he manages to escape from this giant maze. On your way to him, look out for these hidden items: 

  • 5 hidden stars
  • 5 green treasure chests
  • 5 red trophies
  • Mr. X’s sidekick (wearing a striped blue shirt)
  • 5 elephants
  • 1 lion
  • 1 shark
  • 1 ghost
  • a stolen statue’s head
  • 10 gold weathercocks
Text and illustrations © 2015 IC4DESIGN. 
Excerpt from Pierre the Maze Detective: The Search for the Stolen Maze Stone,
published in 2015 by Laurence King Publishing Ltd., London.

The solution is shown below.

hiro-kamigaki
Hiro Kamigaki July 1, 2018
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Trolls and Cakes

Section: Brain Teasers Category: Deduction
Difficulty:

You are on your way to visit your Grandma, who lives at the end of the valley. It’s her birthday, and you want to give her the cakes you’ve made.

Between your house and her house, you have to cross 7 bridges, and as it goes in the land of make-believe, there is a troll under every bridge! Each troll, quite rightly, insists that you pay a troll toll. Before you can cross their bridge, you have to give them half of the cakes you are carrying, but as they are kind trolls, they each give you back a single cake.

How many cakes do you have to leave home with to make sure that you arrive at Grandma’s with exactly 2 cakes?

You leave with 2 cakes. Every time you cross a bridge, you give one of them to a troll, and then get it back. Eventually, you will arrive at your grandma with exactly 2 cakes.

unknown-author
Unknown Author June 27, 2018
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The Candy Shop

Section: Brain Teasers Category: Deduction
Difficulty:

A candy shop lets children exchange 3 chocolate wrappers for a brand new chocolate. Willy is walking around town collecting chocolate wrappers from people. How many wrappers must he collect in order to eat 10 chocolates?

He needs only 21 wrappers. He uses them to get 7 chocolates. After he eats them, he is left with 7 wrappers, which uses to get 2 more chocolates. After he eats these, he is left with 3 wrappers, which are enough to get one more chocolate and make them 10 in total.

unknown-author
Unknown Author June 18, 2018
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