Run · Voynich Manuscript
T40 rung B, planted control: key recovery with the sign boundaries learned
Same limit as the session-8 ladder (unit discovery 25 %). The family's signs overlap (o, ok and oko can all be signs), so a run of glyphs reads many ways. A uniquely decodable (prefix-free) sign set was tried as a design option: drawn from the manuscript's own glyph chunks it yields only 58 signs where about 130 are needed, and text unlike the manuscript (glyph h2 3.84 against 2.37), so it was not pursued.
Result
| Run | Measured | Result | Against | Decision | Date |
|---|---|---|---|---|---|
| Run | Held-out key accuracy by use / character similarity / dictionary coverage (true plaintext's) | V 450, signs up to 6 glyphs: 0.114 / 0.062 / 0.232 (0.697); V 200, signs up to 3 glyphs: 0.228 / 0.082 / 0.271 (0.697) | Rung A (true boundaries): 0.706 / 0.728 / 0.336 | Fails: with learned boundaries the key is not recovered, so by the protocol the manuscript is untested beyond rung A for this family |
What it used and found
Latin genre texts
DATDataset
ZL3b transcription
DATDataset
Latin as a re-spaced homophonic stream (period practices)
ANSAnswer it tests
Parameters
setting = as rung A, segmentation = [{'V': 450, 'rounds': 4, 'max_len': 6, 'iterations': 300000}, {'V': 200, 'rounds': 4, 'max_len': 3, 'iterations': 600000}]Cite it
Mysteries Department. (2026). T40 rung B, planted control: key recovery with the sign boundaries learned [Run RUN0DCBBTB9HD1M]. https://mysteriesdept.com/r/RUN0DCBBTB9HD1M
@misc{mysteriesdept_run0dcbbtb9hd1m,
title = {T40 rung B, planted control: key recovery with the sign boundaries learned},
author = {{Mysteries Department}},
year = {2026},
note = {Run, catalog key RUN0DCBBTB9HD1M},
url = {https://mysteriesdept.com/r/RUN0DCBBTB9HD1M}
}