By Walter Freiherr Von Holzhausen. White to mate in two moves.
Puzzles
Black and White
By Arthur Napoleão Dos Santos. White to mate in two moves.
Edge Case
A circular table stands in a corner, touching both walls. A certain point on the table’s edge is 9 inches from one wall and 8 inches from the other. What’s the diameter of the table?
Going Down
In antiquity Aristotle had taught that a heavy weight falls faster than a light one. In 1638, without any experimentation, Galileo saw that this could not be true. What had he realized?
Black and White
By Niels Høeg. White to mate in two moves.
Fish Story
A logic exercise by Lewis Carroll: What conclusion can be drawn from these premises?
- No shark ever doubts that it is well fitted out.
- A fish that cannot dance a minuet is contemptible.
- No fish is quite certain that it is well fitted out unless it has three rows of teeth.
- All fishes except sharks are kind to children.
- No heavy fish can dance a minuet.
- A fish with three rows of teeth is not to be despised.
Black and White
By Robert Henry Ramsey. White to mate in two moves.
Two for One
Longfellow thought that Dante Gabriel Rossetti, the Victorian poet and painter, was two different people. On leaving Rossetti’s house he said, “I have been very glad to meet you, Mr. Rossetti, and should like to have met your brother also. Pray tell him how much I admire his beautiful poem, ‘The Blessed Damozel.'”
In Philosophical Troubles, Saul A. Kripke offers a related puzzle. Peter believes that politicians never have musical talent. He knows of Paderewski, the great pianist and composer, and he has heard of Paderewski the Polish statesman, but he does not know that they are the same person. Does Peter believe that Paderewski had musical talent?
Black and White
By Charles Ephrem St. Maurice. White to mate in two moves.
Black and White
By Miroslav Havel. White to mate in two moves.