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Explorer 132 Challenge Mystery Cache

Hidden : 04/19/2012
4 out of 5
2 out of 5

Size: Size:   small (small)

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Geocache Description:

This is another cache in the Explorer Challenge series, originally conceived by PetersfieldPoodlePosse, and based upon British Ordnance Survey grid squares as depicted on Explorer maps.

The cache is not at the published location which is the centre point of the playing area for this Challenge. But there is no puzzle - the co-ordinates for the physical cache can be found in the Waypoints section below.

To complete the challenge you need to find (or have found) a total of 132 different caches. I expect a fair number of you will already qualify - so who will be the first to the cache?

What is the Explorer 132 Challenge?

The cache is called the Explorer 132 Challenge because each of the 132 different caches you need to have found to qualify must be in a different British Ordnance Survey grid square as depicted on the Explorer 132 Winchester, New Alresford and East Meon map.

The caches can be of any type, previous finds qualify (including those finds now archived and events attended (even if you were the host)), in fact just about any cache other than those you have placed yourself can be counted.

The grids on the map "start" in the north west corner near Chilbolton at SU 40000 40000

and "finish" just south of East Meon at SU 70000 20000, giving a possible twenty squares (South to North) by thirty squares (East to West) equals 600 squares in total in which you need to find a cache in 132 different squares to qualify.

For the purposes of this challenge the published co-ordinates of all caches, including Unknown/Mystery and Multi caches are those that are to be used when determining which square a cache counts towards.

So how do I know which of the 600 grid squares on the OS map my cache find is in?

Well, the British OS Grid reference is given at the top of each cache page just below the main co-ordinates, as circled in red below. Or if you click on the link in the "For online maps..." section of the cache page, this will show the location of the cache in its grid square on an OS map.

To help those of you that want to plan your finds a GSAK Macro has been written which produces a web page of your finds, example output shown below.

When you have found the 132 caches, you need to provide proof of that fact to be eligible to claim a find on the cache; this can be via one of any number of different methods you may have available:-

1. List the 132 cache codes and names and the corresponding grid reference in your found log. e.g.

GC352ZK Church Micro #1105 - Itchen Abbas SU 53000 32000

GC20BEY Life of Bryan SU 58000 20000

2. Create a public bookmark list

3. After the GSAK macro has run and displayed its output in your browser window, save the web page (as an .html file) and email it to me.

4. Attach the GSAK macro generated image to your log, add it to your profile, or email it to me.

5. Create a Spreadsheet grid of your finds and attach an image of it to your log.

The GSAK route is probably the easiest.

Any finds without proof of qualification will of course be deleted! Have fun!

League table of squares filled by finders shown below: (those in grey have not found the cache as yet)

Position Cacher Squares Filled Date
1 SeekingSalters 273 11/5/12
2 1gowild 260 2/7/14
3 DizzyPair 252 9/9/12
4 QRANG - Owner 247 19/4/12
5 Ann_and_Brian 238 11/1/13
6 BabsBaby 224 10/8/12
7 Mario Mctavish - FTF 196 22/4/12
8 chilihouse 187 26/5/13
9 LukeAmyNickyDavey 175 21/8/13
10 t.a.folk 157 29/10/12
11 CelticTykers 154 15/5/15
12 Micky Two Pints 153 12/04/13
13 Haiselden Family 152 18/08/12
14 Misty's Muskateers 150 02/01/14
15 Lydford Locators 145 19/12/13
16= Buzio 144 13/04/14
16= Fay. R+R 144 24/07/14
18 MartyBartfast 140 26/10/13
19 Mellers 139 21/03/13
20= DTJM 138 13/5/12
20= MGB Lady 138 29/6/14
20= paul_and_judith 138 11/7/15
23 KITEY 134 14/9/13
24 WeLuvGC 133 5/9/15
25 PetersfieldPoodlePosse 132 13/4/13
26 name no date
27 name no date

My qualifying caches.

My thanks to PetersfieldPoodlePosse for producing the GSAK Macro.

To find out more about this and other Explorer Challenge caches, go to which has been created to complement the cache series.

Additional Hints (Decrypt)

Onfr bs gerr

Decryption Key


(letter above equals below, and vice versa)