Explorer 180 Challenge (Oxford) Mystery Cache

This is another in the Explorer Challenge series originally conceived by the PetersfieldPoodlePosse. The cache is at the published location, from where there is a wide view of some of the cache catchment area, but to log it you must have found caches in at least 180 different one-kilometer grid squares on the OS Explorer 180 map, Oxford Witney & Woodstock.

Each of the 180 different caches you need to have found to qualify must be in a different British Ordnance Survey grid square as depicted on the Explorer 180 Oxford map.

These caches can be of any type, previous finds qualify (including those caches 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.

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

From personal experience I know how time consuming it is trying to determine which of the squares of any map a cache qualifies for, although of course the British Grid reference is given at the top of each cache page just below the main co-ordinates shown in bold, as circled below.

To help those of you who want to plan your finds (or check if you already qualify) a GSAK Macro has been written which produces a web page of your finds, as shown below.

This is my own grid on day of publication of this cache, so you can see I had 239 qualifying caches. The 12 unfound is a bit misleading, as this is only solved puzzles that I've not yet found - normally this figure would include ALL unfound caches.

When you have logged finds on the 180 caches, you need to provide proof of that fact to be eligible to claim a find on this cache; this can be in one of a number of different ways:

1. List the 180 cache codes and names in corresponding grid reference order in your found log (tedious and time consuming for you in compiling and me in checking, so not appreciated!)
2. Create a public bookmark list of your finds, and include the link in your log
3. Send the GSAK Macro generated file to us via our profile or add it to your profile page
4. Send us your "My Finds" Pocket Query and we will run the GSAK Macro for you and let you know if you qualify and if not which squares you still need to find a cache in to qualify

UPDATE JULY 2019 - please make sure you are using the latest (2019) macro, not the original, which no longer works.

Any Found logs submitted without proof of qualification will of course be deleted! Have fun!

To find out more about this and other Explorer Challenge caches, check this page, which has been created by PetersfieldPoodlePosse to complement the cache series. My thanks to them for the original Explorer Challenge idea, and for adding this cache to the GSAK Macro.

Please note that the Difficulty rating for this cache reflects the work required to obtain qualifying caches, the Terrain rating relates solely to this cache.