Here’s a bridge-themed cache for the card players. The cache is not
at the above coordinates, but is within 5 km. The correct position
can be derived from the following instructional passage:
In bridge, the finesse is a basic play technique that depends on
the position of opposing cards. For example, if North (the dummy)
has A1073 and declarer has QJ5, at least three tricks can be won if
the king lies under dummy. Similarly, with KJ84 in dummy, you can
guess to play for either the queen or the ace to be on your left.
Even with as little as Q102, leading towards the honors will score
a trick if the jack is well placed. Spot cards are very important:
J54 opposite A862 will produce two tricks only about 40% of the
time, but with J109 instead you will take at least two tricks
irrespective of West’s holding; 77% of the time you will take
three. It is the combination not the exact positioning that is
important: the honors can be in dummy opposite 1098 alone in hand,
and the odds do not change. Likewise, with AK74 opposite three
small, no finesse is possible, but AKQ10 gives you the choice
between finessing and trying to drop the jack in three rounds --
the latter is preferable (61% as compared to 50%). Defensive ploys
are also possible in some positions: rising with the queen from Q5
(say) when declarer leads up to dummy’s AJ1082 could cut him off
from the suit if there are no side entries. In contrast, a defender
with a holding such as KQ63 underneath this dummy should play low
on the first round, hoping declarer will put in the eight. Finally,
it's not always right to finesse even when you can: the following
is a non-finessing situation. The position where declarer is
missing Qxxx in a suit (the x’s stand for spot cards) is well
known, and you should play for the drop, rather than finessing. By
the time declarer plays from dummy to the second round of the suit,
the odds favor the suit being 2-2, as opposed to one opponent’s
having started with Qxx, by 52 to 48.
You can check your answers for this puzzle on
Geochecker.com.
Original contents of cache:
Deck of World Bridge Championship symmetrical-design playing
cards
Coasters from 2006 North American Championships in Hawaii
Laser light key chain
Hand records from recent bridge game at a local club
Desk calculator/ruler