Geocaching Solver Overview
Need to derive GPS waypoint coordinates from three 6-digit Reverse Wherigo codes? The Waldmeister "Reverse Cache - beta" cartridge encodes physical coordinates into three 6-digit numerical blocks. Instead of manually triangulating distance circles in the field, this solver applies the cartridge's exact permutation algorithm to output WGS84 coordinates in decimal and degrees-minutes formats.
Key Capabilities
- Reconstructs target GPS coordinates from 3 standard 6-digit Waldmeister code blocks.
- Derives hemisphere quadrants (N/S and E/W) directly from digit a4 in Code A.
- Selects between Algorithm 1 and Algorithm 2 using parity checks on digits c2 and c5.
- Generates direct map links for Google Maps and Geocaching.com.
Permutation Logic and Mathematical Rules
The Waldmeister Reverse Cache system splits target coordinates across 18 digits distributed into three 6-digit codes (A, B, and C):
1. Hemisphere Detection: Digit a4 determines the coordinate sign: - 1: North / East (+ / +) - 2: South / East (- / +) - 3: North / West (+ / -) - 4: South / West (- / -)
2. Algorithm Branching: The solver calculates the sum of c2 and c5 from Code C: - Even sum: Applies Algorithm 1 permutation. Latitude is assembled as a3 b5 . b2 c4 a1 c5 a6, while Longitude is a2 c1 c6 . b4 b1 a5 c2 b6. - Odd sum: Applies Algorithm 2 permutation. Latitude is assembled as b1 a6 . a3 c1 c4 c5 a1, while Longitude is b5 c6 a5 . a2 b4 b6 c2 b2.
The resulting decimal degrees are bounded within [-90, +90] latitude and [-180, +180] longitude before converting to standard GPS degrees and decimal minutes (DD MM.mmm).
Coordinate Recovery Steps
- Locate the three 6-digit codes published on the geocache listing page.
- Paste the numbers into Code A, Code B, and Code C input boxes.
- Inspect the solved decimal degrees and standard DD MM.mmm waypoint output.
- Click the map links to verify location plausibility against satellite imagery.
Field Verification and WGS84 Precision
The permutation outputs coordinates matching the WGS84 datum used by global GPS satellites and handheld receivers. Handheld GPS units typically achieve 3 to 5 meter horizontal accuracy. Verify the terrain profile and local cache attributes before heading out to search.
Compatibility Constraints
This solver implements the standard -Waldmeister- "The Reverse Cache - beta" Lua cartridge schema. Custom multi-stage Wherigo cartridges that implement proprietary Lua scripting or custom cryptographic seeds will not resolve using this permutation table.
Frequently asked questions
Why do some listings show three separate 6-digit codes?
Geocache owners using the standard Waldmeister builder cartridge generate three distinct 6-digit tokens representing their hidden container coordinates.
How does the tool handle invalid codes?
If a4 contains values outside 1-4, or if the assembled degrees exceed geographical limits (latitude > 90 or longitude > 180), the parser outputs an out-of-range validation warning.
Summary
Solve Waldmeister reverse cache mystery codes directly in your browser. For text-based puzzle caches, test the Letters to Numbers converter or explore Caesar cipher brute force.