In Fa|susTIPS

Guide · FORBIDDEN 12

Shadows of Unknown FBD 12: the Arc 4 FORBIDDEN rung, perfected on film

Sad Keyboard Guy feat. vally.exe closes the Arc 4 song block with a FORBIDDEN 12 chart, and this page walks its frame-documented PERFECT DIVE step by step — what the HUD reads, where the 1,913 notes land, and how the ledger closes against the community wiki's own split digit for digit.

SongShadows of Unknown — Sad Keyboard Guy feat. vally.exe
DifficultyMIN — · EVO — · ULT 10 · FORBIDDEN (FBD) 12
Notes (FBD 12)1,913 judged, read off the settled card — EXACT 1864 + EXACT 49, NEAR 0, BREAK 0, MAX LINK 1913. The community wiki's split sums to the same 1,913, digit for digit.
ResultPERFECT DIVE on film: 100'001'864, rank EX+ (099'792'738 + 000'209'126) · SPEED 5.00, assist-free · encounter UNLINKED

Sources

One filmed run plus one community chart table. Seconds are quoted on the extraction timeline of the stills this page ships; if a deep link lands a beat early, the neighbouring second shows the described content. Community figures are labelled as such and kept separate from frame reads.

Spoiler notice: Shadows of Unknown is an Arc 4 story-progress unlock — our song table files it under Arc 4: The Hand of Calamity with the unlock recorded as 11/13 Late Night #2 (Nia), so knowing the song exists is itself a late-game progression spoiler. The meta title and description stay chart-only, and every frame below this box is a menu, the playfield or a result screen — no story scenes, dialogue or endings. Readers saving a blind first play, stop here.

Read the run first

  1. 1

    The cold open: a PAUSED menu

    The film's first frame is a PAUSED menu — RETRY, RESUME, QUIT — floating over a field whose HUD still holds 099'420'746, a residue of the uploader's prior run. The site's other filmed dives open the same way; the residue is recorded and never read as part of this chart's story. The dive itself starts from zero two seconds later.

    The In Falsus film opens on a PAUSED menu over a prior-run HUD holding 099'420'746 before the Shadows of Unknown dive starts
    PAUSED at t=0 — the 099'420'746 behind it belongs to the previous run, not this one.Watch at
  2. 2

    Zeroed, and the contract on the HUD

    The dive opens at 000'000'000 on an empty candle-lit field. Top right, the contract stays pinned for the whole run: Shadows of Unknown / Sad Keyboard Guy feat. vally.exe, the red FBD 12 badge, SPEED 5.00 — and no Assist Mode chip anywhere on the HUD. Everything that follows lands on the six lanes between Shift and Space.

    In Falsus opens the Shadows of Unknown FBD 12 dive at 000'000'000 with the HUD song card reading FBD 12 and SPEED 5.00
    000'000'000 with FBD 12 and SPEED 5.00 pinned — the whole run's terms in one frame.Watch at

The opening, watermark 0–700

  1. 3

    First pyramid, watermark 11

    The first wide violet pyramid takes the opening EXACT burst at 000'564'032 with the chain watermark on 11. Shadows of Unknown spends its first stretch politely — one shape at a time — which is where the SPEED 5.00 spacing settles into the hands before the chart starts spending notes in earnest.

    The first wide violet pyramid lands an EXACT burst at 000'564'032 with the chain watermark on 11 in Shadows of Unknown FBD 12
    Watermark 11 at 000'564'032 — the calm open where the 5.00 spacing settles.Watch at
  2. 4

    Triples and the first flick, watermark 228

    Triple EXACT bursts arrive with a yellow flick arc riding the line at 011'907'725, watermark 228. The pattern from here is alternation: a burst row, then a flick, then a slab — nothing repeats faster than a beat, and the watermark's steady climb shows the run banking notes in clean lumps.

    Triple EXACT bursts and a yellow flick arc land at 011'907'725 with the chain watermark on 228 in Shadows of Unknown FBD 12
    Watermark 228 — bursts alternate with flicks while the chain climbs in lumps.Watch at
  3. 5

    Four across, watermark 637

    Four EXACT judgments line the whole key row at 033'292'940 with the watermark on 637 and gold hex gates firing under the line. Full-row moments like this are the chart's checkpoints: the film crosses each one with all four fingers already home, no visible recovery anywhere in the frame.

    Four EXACT judgments line the row at 033'292'940 with the watermark on 637 and gold hex gates firing in Shadows of Unknown FBD 12
    Watermark 637 — four EXACTs across, the run's first full-row checkpoint.Watch at

The widest beam and the walls

  1. 6

    The widest beam of the run

    At 053'692'057 a cyan field beam floods the highway edge to edge — the widest single object Shadows of Unknown draws. The same glow that makes the frame striking washes the chain watermark out completely; this page quotes the playfield here and no number, because the watermark is genuinely unreadable at this instant.

    The widest cyan field beam of the run floods the Shadows of Unknown highway at 053'692'057, its glow washing out the watermark
    The widest cyan field at 053'692'057 — beautiful, and exactly where the watermark becomes unreadable.Watch at
  2. 7

    The tall wall, watermark 1204

    A full-height violet wall crosses lane D at 062'902'006 with the watermark on 1204 — two-thirds of the chart banked. Walls read as one object but score as many notes; the film treats each wall as a single hand-shape change, which is why the HUD climbs smoothly while the watermark jumps in chunks.

    A tall violet wall slab crosses lane D at 062'902'006 with the watermark on 1204 in the mid-run of Shadows of Unknown FBD 12
    Watermark 1204 — the wall is one shape change, not a burst.Watch at
  3. 8

    Gold on the back stretch, watermark 1721

    A gold beam meets a triple EXACT row at 089'944'315 with the watermark on 1721. From here the chart stops alternating and starts converging — the slabs get taller and the gaps close — and the run is already within two hundred notes of its final total with the field still tidy.

    A gold beam and a triple EXACT row meet at 089'944'315 with the watermark on 1721 in the back stretch of Shadows of Unknown FBD 12
    Watermark 1721 — the back stretch converges toward the pyramid.Watch at

The pyramid, the banner, the ledger

  1. 9

    The closing pyramid, watermark 1849

    The closing violet pyramid spans the highway at 096'609'698 with the watermark printing 1849 — the last readable mid-run value before the tail. One shape covers every lane at once; the film rides it dead center and the apex lands last, emptying the field behind it.

    The closing violet pyramid spans the highway at 096'609'698 with the chain watermark printing 1849 in Shadows of Unknown FBD 12
    Watermark 1849 on the closing pyramid — one shape, every lane, apex last.Watch at
  2. 10

    PERFECT DIVE crosses the emptied field

    Seconds after the last note, the PERFECT DIVE banner sweeps the already-darkened field — every note judged EXACT, nothing left to break it. The film then cuts to black before the result panel, so this banner is the run's only on-field celebration, and the card carries the same verdict beneath it.

    The PERFECT DIVE banner crosses the emptied In Falsus field seconds after the last note of Shadows of Unknown FBD 12
    PERFECT DIVE over the emptied field — the verdict arrives before the ledger.Watch at
  3. 11

    Watermark 1913, full score banked

    The emptied field tells the story: the chain watermark parks at 1913 with 100'001'864 already frozen on the HUD — and it holds there across successive frames (1913 at t=166 and again at t=168), the chain tail agreeing with the card's MAX LINK before the card is even shown. This frame is the run's whole argument in one image.

    In Falsus parks the chain watermark at 1913 on the emptied Shadows of Unknown field with 100'001'864 already banked on the HUD
    1913 on the emptied field, 100'001'864 on the HUD — nothing left to judge.Watch at
  4. 12

    The card: 1,913 notes, closed three ways

    The settled DIVE RESULT card reads SCORE 100'001'864, rank EX+, PERFECT DIVE — EXACT 1864 + EXACT 49, NEAR 0, BREAK 0, MAX LINK 1913, the red 12 badge on the jacket, and the IOTA row printing ENCOUNTER UNLINKED. The ledger closes three ways at once: 099'792'738 + 000'209'126 = 100'001'864; the judgment rows sum to the MAX LINK; and the community wiki's own FBD split (305 + 671 + 709 + 228) lands on the same 1,913 digit for digit.

    The settled In Falsus DIVE RESULT card prints 100'001'864 rank EX+ with EXACT 1864 + 49, NEAR 0, BREAK 0, MAX LINK 1913
    EX+ 100'001'864 — EXACT 1864 + 49, NEAR 0, BREAK 0, MAX LINK 1913.Watch at

Chart map: five segments

A frame-anchored reading of how Shadows of Unknown FBD 12 spends its 1,913 notes. Segment boundaries are read off the HUD counter and the stills above — they describe what the film shows, not a difficulty claim.

  1. 1

    The patient opening (watermark 0–300)

    One pyramid, one flick row, one burst at a time. The watermark sits at 11 eight seconds in and 228 by twenty-nine — the chart earns its notes slowly, and the calm open is where the SPEED 5.00 spacing settles before the walls arrive.

  2. 2

    Gates and the widest beam (300–700)

    Gold hex gates fire under full-row EXACTs and the watermark passes 637 on a clean four-across. The segment closes on the run's widest cyan field — visually the peak, and deliberately the one place this page quotes no watermark, because the beam washes it out.

  3. 3

    The walls at four digits (700–1200)

    Full-height violet walls alternate with burst rows; each wall is one hand-shape change rather than a burst, and the film survives them lane-committed. The watermark reads 1204 as the second wall crosses — two-thirds banked with the HUD climbing smoothly.

  4. 4

    Convergence (1200–1850)

    Gold beams, triple rows and the last tall slabs — the chart stops alternating and starts funneling. The watermark passes 1721 with the field still tidy, then prints 1849 across the closing pyramid, the last mid-run value the film shows cleanly.

  5. 5

    The pyramid, the banner, the ledger (1850–1913)

    One shape covers every lane, the apex lands last, PERFECT DIVE crosses the emptied field, and the watermark parks at 1913 before the card confirms it a third time. The run's whole argument fits in the final three seconds.

Fingering on the six-key keybed

Mapped to the site's hand-placement system: side lanes to Left Shift (pinky) and Space (thumb), centre lanes A-S-D-F to ring, middle and index. What follows is how the film's hand positions map onto that system.

  • →Full-row bursts go to a pre-bracketed hand: ring on A, middle on S, index on D, the same hand folding to F — the film crosses every four-across checkpoint without a visible reach.
  • →Walls are shape changes, not rolls: plant the wall lane's finger early and let the burst rows go to the free fingers — exactly how the film's HUD climbs smoothly through the four-digit stretch.
  • →The yellow flicks are wrist drops, not taps — the film's flick arcs always ride the line's left half, so keep the left hand loose and hand the trailing slabs to the right.
  • →The closing pyramid is one shape: all five keys bracketed at once, apex note last — practise the bracket, not the notes.

Deck and encounter notes

What the film actually shows about the run's loadout, plus how the site's card vocabulary maps onto it. Card identities are not legible at speed, so nothing here quotes effects.

  • →The result card's IOTA row prints ENCOUNTER UNLINKED — this dive ran with no encounter attached, and there is no encounter settlement line to read. What an encounter would have changed is not on film, so this page quotes none of it.
  • →The HUD song card reads FBD 12 and SPEED 5.00 at five separate timestamps, and no Assist Mode banner ever appears — that combination is this page's evidence for an assist-free, vanilla-modifier run.
  • →The HIGH SCORE chip reads 099'792'738 on the card, which makes DIFFERENCE +000'209'126 the margin over the account's own prior best. No deck threshold gates this run — it is pure execution.

Practice notes

  • →The sparse stretch before watermark 228 is the metronome check: deep-link the film at ?t=29 and play the opening until the burst spacing feels short rather than wide — that is the SPEED 5.00 rhythm locked.
  • →The widest beam at ?t=90 is a deliberate blind spot: practise the surrounding seconds with the watermark covered, so an unreadable counter never tempts a glance mid-beam.
  • →The closing pyramid is a shape, not a sequence — deep-link ?t=150 and drill the all-five-keys bracket until the apex note lands last without a re-grip.

FAQ

How many notes does Shadows of Unknown have on FBD 12?

1,913 judged notes — EXACT 1864 + EXACT 49, NEAR 0, BREAK 0, and the MAX LINK chip agrees at 1913, as does the chain watermark parked on the emptied field. The community wiki's own split for the chart (tap 305 + hold 671 + field 709 + flick 228) sums to the same 1,913, digit for digit — frame and catalog close without remainder.

What score is a PERFECT DIVE on Shadows of Unknown FBD 12?

The filmed one settled at 100'001'864 rank EX+ — HIGH SCORE 099'792'738 plus DIFFERENCE +000'209'126. The DIFFERENCE chip compares against the account's own prior best, so another player's PERFECT DIVE lands on a different score; the ledger that must close is SCORE = HIGH SCORE + DIFFERENCE, with all 1,913 notes EXACT.

Is this the first documented PERFECT DIVE of Shadows of Unknown FBD 12?

It is the first frame-documented one we know of: 도토리's 1080p capture titled Shadows of Unknown (FBD 12) PERFECT DIVE (MAX-49), uploaded October 7, 2026, walked frame by frame on this page. infalsus.org's own Shadows of Unknown page is a ULT 10 walkthrough with no FBD receipt listed as of October 8, 2026, and the community wiki's chart table publishes levels but no FBD receipt of its own — so this page's triple closure (card, watermark, catalog split) is the deepest public record for the chart that we know of.

What SPEED and assist settings does the filmed run use, and is this page spoiler-safe?

SPEED 5.00, readable on the HUD song card at five separate points, with no Assist Mode banner and the IOTA row printing ENCOUNTER UNLINKED. On spoilers: the song is an Arc 4 unlock (11/13 Late Night #2, Nia), so its existence is itself a progression spoiler — the notice above the walkthrough is the gate, and everything below it is chart-only.

Written for infalsustips.com from our own demo testing and community research. Fact-checked against: In Falsus Wiki (Miraheze) (CC BY-SA 4.0) · In Falsus Wiki (Fandom) (CC BY-SA)

Data reflects demo v0.3.1 · being re-verified on 1.0 · Unofficial fan site — In Falsus © lowiro

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