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Mate in One – Checkmate! Mystery Cache

This cache has been archived.

Team Perrito Blanco: This series has had a great run. We hope you all had fun with it.

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Hidden : 4/9/2006
Difficulty:
2.5 out of 5
Terrain:
1.5 out of 5

Size: Size:   regular (regular)

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Geocache Description:


THE CACHE IS NOT AT THE LISTED COORDINATES!!

This cache is one in a series of 5. The other 4 caches in this series ( Mate in One - Zugzwang, Mate in One - Fianchetto, Mate in One - J'Adoube, Mate in One - En Passant) contain the positions of the pieces in a chess puzzle. After finding the first 4 caches, you'll need to figure out the move that produces checkmate for the White side. This move will reveal the missing digits of the coordinates of this, the final cache.

checkmate - Any position where a King cannot avoid capture. The objective end of a chess game.

You'll need to understand a little about chess notation in order to produce the missing digits in the coordinates of this cache. A chessboard's squares each have a file (column) letter and a rank (row) number assigned to them. Just like the latitude and longitude you use to hunt geocaches.

In the following position,

the checkmating move would be to use the rook on h1 to take the bishop on h8. That move would be h1-h8. We are only concerned with the number part of the move for our cache. The number of the square of the beginning of the move (h1) shall be "a" and the number of the square of the end of the move (h8) shall be "b". For the move h1-h8, a=1 and b=8.

Now once you figure out the checkmating move, you'll have your own "a" and "b" variables. The final cache coordinates are at the following location:

N 40°59.uvw', W074°17.xyz'

where
u= a-4
v= b-a
w= a-4
x= a+3
y= b+3
z= b

The cache is a camo-painted ammo box with trade items and a pencil inside. Bring your own writing instrument just in case though. We hope you enjoy this puzzle!

You can check your answers for this puzzle on Geochecker.com.

Additional Hints (Decrypt)

Va gehax bs gerr.

Decryption Key

A|B|C|D|E|F|G|H|I|J|K|L|M
-------------------------
N|O|P|Q|R|S|T|U|V|W|X|Y|Z

(letter above equals below, and vice versa)