For a number of years, we were pretty active geocachers.  “pandandfoo” as we were known – though it’s been a while since we did anything much.

We started hiding caches, and I started devising puzzles to conceal the coordinates — a popular variant of caching, at least in these parts.  This is one puzzle I was pretty proud of.  People are still busting their skulls on it to this day.

I called it QMXLP

Geocache Description:

The posted coords are for parking only

ADDGG FXDFG AVAAD DAGXA AGAGD XVVDG FXFGG
FGXAA AGDFG XADXG AXDVD GXGFG XFXGX GDGGV
ADDGG VDGAF XFAGX FDDVG AGAGA AFAXA DAAFF
GXXAA AXXAA DGFGG GGGGA GAGAG AGAGA GAGAG
AGAGA GAGAG AGAGA GAGFA AFGAD DAGDF DFXGX
GAGFA ADDVD VGGAV DAGAX GXDGA GVDAA AGAAV
ADFAG AGGGF XFDGF GAAXD DGAAA DGAGD GAAFA
GVXXX AGAGG XGAFX XFDDX XAGXF DADGA XXAAX
GGGXX DXXXG XGADX AXFFD XVDXF VAADD ADDAD
XXXXG DVAGA XAADA DVAGD VXGAG AAGAX GXADX
XXXXX XXXXX XXXXX XXXXX XXXXX XXXXA AGXDX
AAFAG AVGFA DAFDD DFXXD GGAAF GFGAA AFGAG
AFXDA AGXFD FDDAD AAAAA AFFAX DVGXD AAFAG
AVFDX DDGAA AFAXF XAVDF AAXFD DAXDD AGGAA
FDDAG DGXGD XDDAF GXAGD VAGGG XFXGA GFFXV
ADDGD AFAGG VAAVX VXDAF GXXFG DAGFA DFXXV
GAADX DXADA AAVXV XVXVX VXVXV XVXVX VXVXV
XVXVX VXAFX XGGAA FGAVF XDGAA AFVAF ADADD
FADXD FFAFG GDDFA AFGAX AGVGG AFAXA ADADA
AVDVD GGGGA GVGFX DXAVA AAAFD FDVDD AVAGX
XGADA VGAFA XFAGA DVAXA FAGFG XFDGD AAXAG
AAAXF VAXGX GDAXX FAGAF DFGAA FDDXA XADDD
XVGDF DFGFG AGXAG ADDAV FGVDF ADXAX AXAXA
XAXAX AXAXA XAXAX AXAXA XADGG GAGAD GXGVD
AAAGV AFADA GAADX DDVAA FAAAD AAAAG XAGDX
GGAXF AADVG AFGFG XXAAD ADAAA AAGGD GDAAA
FFAGA AXAVD VADXX XDAGD GDAGG VGGAG AGDAX
XDXXG FXXGD DXVGX AFFAF AGAFD FAFDA XXDAG
VAADD GXVXV GAGXV XDFVA GGVDG AAXAF AAAAA
AAXAD XVXVX VXVXV XVXVX VXVXV XVXVX VXVXV
AGAAG VVDXA XFADD GAVAD GDADG GGAAA XDFAD
AAGAG AAXAA AGADF ADAFG AGXGA AAAGA DAVAF

I only ever gave out one hint for it, which I will replicate here. (Putting it in ROT-13 in case you want to go at it “pure”)  Gur vasbezngvba lbh arrq vf ivfhnyyl qvfgvapg vf gur cntr.

If you want more stuff like this, let me know.

By the way, one person solved it with a pure cryptanalytic approach, not by sussing out what the keys are.  I’ve heard of the “greater fool” principle.  Apparently there’s a “greater geek” principle, as well!

“It pays to be obvious, especially if you have a reputation for subtlety.”

–Isaac Asimov