{
  "tm": "1RB0LD_0RC---_0RD0RF_1LE0LA_1LF1LE_1RA0RD",
  "label": "W6-6",
  "status": "CRYPTID_CANDIDATE",
  "stage": "observe",
  "updated": "2026-10-14",
  "confidence": "med",
  "holdout_line_740": 221,
  "reason": "Observe done (about 1 h 45 min). A glider runs between two 8-cell fields (11010100 left, 11110001 right): 32 steps per block going right, 36 going left (GR, GL, 200/200 each). It bounces between a wall and the right end (+2 cells per bounce) in two phases. Phase S: the wall moves right 18 cells per bounce and leaves an 18-cell wake piece (S1, exact, 68b+388 steps; 200/200 random, 830/830 real bounces). Phase G: the wake, rewritten into 72-cell units, is turned back into field, 18 blocks per unit per 36 bounces (G36, exact, 2448b+26828 steps; 150/150 random, 86/86 real). So the field at each S start follows b' = 9b/4 + c: b mod 8 picks the S->G branch (b mod 2 the G alignment), and c (-14..+42 over 9 cycles to 1.3e12) comes from the junk edge, which every G->S transition digs into and rewrites (its counters ran 6->0 and 17->7; left edge -52 -> -111 after 1e10). That is pseudo-random arithmetic driving a chaotic edge, so the cryptid protocol applies: rules formalized in observe.json, flagged, stopped. No halting branch known: halting needs C> 1001; no halt to 4.2e13 (exact accelerated simulator, tape-identical to direct at 1.2e8, 1e9, 3e9).",
  "siblings": [
    "416 1RB0RE_1RC0LE_0RD---_0RE0RA_1LF0LB_1LA1LF",
    "455 1RB0RD_1RC1RB_1LD0LA_1LE0RA_0LF---_0LA0LC"
  ],
  "sibling_note": "Same table up to renaming + mirror (canon over all 6 starts): 416 = start F, 455 = start D; both show the same two 8-cell fields at 1e9, with their own junk. Start E is an eqv-1590 member off the list (upstream Eqv_v2.v TM2413 links it to 221: an equivalence, not a verdict). Starts B and C are on no list.",
  "upstream": "No upstream proof of this table at cdaf693; only Eqv_v2.v TM2413. No claim in data/discord or data/sheet (results row 74 and classifications row 93: Unknown only).",
  "template": "None within 5 transitions; nearest proved table W4-3c (7 transitions, base-3 flaw odometer) shares no rules.",
  "priority_call_answered": "Cryptid-like: b' = 9b/4 + c with an 8-way remainder split and a junk-dependent c; no halting branch known. Park it, or fund one 2 h stage for an exact cycle accelerator (GR/GL/S1/G36 + measured transitions) and a census of junk shapes for closure?",
  "parked": "Dennis 2026-10-14: park"
}