# Pandolfini's Puzzler #2 - Ten is Fun

• NM brucepandolfini
• | Aug 9, 2013
• | 21494 views
• | 13 comments

Here we go again ChessKids! You've already solved a position from ProfessorPando where you had to find the worst move, now see if you can checkmate a whole army of Black kings in this zany puzzle!
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Professor Pandolfini gave Lucian an unusual puzzle. “Suppose that you are on the planet Zugzwang, where chess is played with 10 Black kings, and you arrive at the following position.”
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“On Earth this position is impossible. But on the planet Zugzwang, it is a legal position.”
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Question: “On that faraway planet, how can you checkmate all 10 Black kings in one move?”
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Answers Below - Try to solve ProfessorPando's Puzzle first!
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Lucian was confused for a moment. But in less than a minute, he had the answer.
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Answer to Puzzler #2
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Lucian figured out that White can checkmate all 10 kings with 1.Nd3-e5#!
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Remarkably, each of the 10 kings is in check and Black has no legal reply. Indeed, all 10 kings are mated!
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Take note
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White’s winning move is called a discovery or discovered attack.
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A discovery relies on two friendly units: a moving unit and a stationary unit.
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The best discoveries are those in which both friendly units, moving and stationary, do something good.
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RELATED STUDY MATERIAL

• Read about the definition of discovered attack;
• Watch PinkHamster's video on discoveries;
• Read BoundingOwl's story about her students and their discovered attacks.

• 6 months ago

Arxad2002  I thought so. And I still do. Thank you for your comment.

• 6 months ago

very interesting

• 22 months ago

@Vibhav, it said that only Black has 10 kings, the position is legal.

• 2 years ago

wow

• 2 years ago

Whoa, cool.

• 2 years ago

The position is a illegal one

I.e. starting position is illegal one ....

On Palnet Zugzwang the game is played with 10 Kings from both the sides and The side whoose all 10 Kings gets mated first loose ...but see the position There is only one white King ....It is a illegal position ....

• 2 years ago

## @ViktorHNielsen Ke3xd2 is not legal, since the rook is supported by the bishop on e1, isn'it?

• 2 years ago

Ke3xd2 and some of the kings will stay alive

• 2 years ago

Really demonstrates the power of a centralized knight outpost, considering it checkmates 7 of the kings by itself.

• 2 years ago

ne5

• 2 years ago

Saw it in the book The Chess Companion by Irving Chernev.

• 2 years ago

Love stuff like this!

• 2 years ago

Fun, unusual puzzle.