My z32 candidate

Northkey · 2026-09-01T14:58:56Z

My Z32 candidate: AT SIX SIX INCHES FROM MOUNT DIABLO PIT I want to present this as a working hypothesis, not as a proven unique decryption of Z32. My candidate is: AT SIX SIX INCHES FROM MOUNT DIABLO PIT Without spaces: ATSIXSIXINCHESFROMMOUNTDIABLOPIT It is exactly 32 letters. Z32 contains only three repeated-symbol identities: 1 = 26 2 = 32 6 = 14 The candidate gives: 1/26 = A/A 2/32 = T/T 6/14 = S/S All three fit. What is interesting, however, is what happens if we do not insert PIT beforehand. I tested a deliberately restricted map grammar based on what Zodiac actually gave us: Mount Diablo as the origin, the dial positions 0 / 3 / 6 / 9, distances written ONE through TWELVE, and the form: AT [direction] [distance] INCHES FROM MOUNT DIABLO [destination] The destination word was left unknown. Within this defined model, SIX / SIX is the only direction/distance combination that can fill a 32-letter text while satisfying the Z32 constraints 1=26 and 6=14. The result before the destination is determined is: AT SIX SIX INCHES FROM MOUNT DIABLO ??? The known part occupies 29 positions. The Z32 constraint 2=32 then requires the final letter to be the same as position 2, namely T: AT SIX SIX INCHES FROM MOUNT DIABLO ??T This is an important distinction. We did not start with a gravel pit and then construct a 32-letter phrase that hit it. Within this map grammar, SIX / SIX / MOUNT DIABLO / ??T comes first. P and I in PIT are not cryptographically forced; if correct, they must come from the geography. This is also not a claim of global uniqueness. Z32 is too short and contains too little repetition to force a single plaintext without external information. The map operation Zodiac wrote on the Mount Diablo map: “0 is to be set to Mag. N.” In the Little List letter about a month later, he wrote: “P.S. The Mt. Diablo Code concerns Radians & # inches along the radians.” This gives a natural angle-plus-distance operation. Set 0 to magnetic north. The first SIX is read as position 6 on the oriented dial. Six lies directly opposite zero: 6 o’clock = 180° from 0 = π radians This does not mean six radians. 6 radians ≈343.8°, which is a completely different direction. The second SIX belongs to: SIX INCHES and specifies the linear map distance along the ray defined by position 6. The Phillips 66 inset used by Zodiac has the printed scale: “ONE INCH EQUALS APPROX. 6.4 MILES” The nominal 1970 operation is therefore: 6 inches × 6.4 miles/inch = 38.4 miles I am therefore not using the Phillips 66 branding as the source of the words SIX/SIX. It is not necessary for the mechanism. The operative elements are the Z32 construction, the 0–3–6–9 dial, and the map’s printed scale. Source check: Search: "9-QQ-1219-S" Zodiac Search: "Original Untouched '69 Phillips 66 Map" The large original scan shows both the map code 9-QQ-1219-S and the printed 6.4-mile scale. As a modern cross-check — not as the 1970 method — we can compare Mount Diablo with the published locality reference for Near/Neary Quarry. The reference points give approximately: Distance: 38.380 miles Printed-scale equivalent: 5.997 inches Initial true bearing: 197.236° If dial position 6 is magnetic south, that bearing would correspond to a declination of approximately 17.236° E. That value must not be confused with the historical value. A historical calculation for Mount Diablo on June 26, 1970 gives approximately 16°53′ E = 16.9° E. The difference is only a few tenths of a degree. The quarry coordinate is also a locality reference with a stated accuracy of about 100 metres, not a survey-grade target point. I therefore do not use 38.380 versus 38.400 as a “32-metre precision” argument. The point is only that the nominal SIX-INCHES distance and direction are highly consistent with the historical quarry area. Source check for the coordinate/bearing/declination control: Mount Diablo summit reference (USGS topo source via TopoQuest): 37.881702 N, -121.914268 WNear Quarry (Neary Rock Quarry), Mindat locality 92281: 37.35000 N, -122.12083 W; stated MRDS location accuracy 100 mNOAA/NCEI Historic Magnetic Declination CalculatorOn the 32-Character Zodiac Cipher — Table 2 gives Mount Diablo, June 26, 1970 as 16°53′ E What is at the endpoint? When this operation is followed from Mount Diablo, we arrive in the Los Altos Hills area. A contemporary topographic map then gives us an independent geographic check. The USGS Cupertino, California 7.5-minute quadrangle, original 1961, version/photorevision 1968 and print 1969, existed before Z32 was mailed in June 1970. On the map, the area is...

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A reconstruction using the direct approach