# Blindfolded Cubing Resources

## Knowledge

- [J Perm — Blindfolded tutorial](https://www.jperm.net/bld)
  The highest-trust general 3BLD entry point: memorisation, edges, corners, parity, with video throughout.
  Uses Old Pochmann as its base method.
  Use for: the overall shape of a blind solve, and as the recommended companion video for early lessons.

- [J Perm — Getting Faster At Blindfolded](https://www.jperm.net/bld/faster)
  The progression map: Old Pochmann → M2 edges → 3-style.
  States the realistic ceilings — sub-2 and sub-1 minute with good fundamentals, sub-20 for 3-style solvers.
  Use for: deciding when to switch methods, and for calibrating time expectations.

- [Speedsolving Wiki — M2/R2](https://www.speedsolving.com/wiki/index.php/M2/R2)
  Reference list of M2 edge targets and their setup algorithms, the M-slice exception cases, and the r2 wing method.
  Confirms r2's buffer is DFr and that most r2 targets are the M2 algorithms with `M2` replaced by `r2`.
  Use for: lesson 3 (M2 execution) and lesson 6 (wings).

- [Speedsolving Wiki — Speffz](https://www.speedsolving.com/wiki/index.php/Speffz)
  The canonical lettering scheme: face order ULFRBD, letters clockwise from the upper-left piece of each face.
  Use for: the generative rule behind [reference/speffz.html](./reference/speffz.html).

- [Xin Shi / zodzhao — 4x4 Blindfolded tutorial (PDF)](https://zodzhao.github.io/res/4bld.pdf)
  Compact 4BLD notes: 3-cycle commutators for centres, r2 for wings, corners from a UFL buffer, and the 4BLD parity algorithm.
  Use for: the 4x4 stages (6–8). Terse — it assumes 3BLD is already solid.

- [Cubing History — 3-Style](https://www.cubinghistory.com/BlindfoldSolving/Methods/3Style)
  Background on 3-style and on buffer choice.
  Records that Gianfranco Huanqui popularised the UFR/UF buffers on ergonomic grounds — the reason this workspace uses the UFR corner buffer.
  Use for: justifying buffer choices, and for the history behind the method.

- [Blindtrainer](https://blindtrainer.com/)
  Browser trainer for commutators and blind algorithms, including 3-style corners and edges.
  Use for: drilling execution once lesson 4 starts, between our sessions.

## Wisdom (Communities)

- [r/cubers](https://www.reddit.com/r/cubers/)
  General but large and active; blind questions get answered.
  Use for: sanity-checking a memo approach, and for gear questions such as blindfolds and 4x4 choice.

- [SpeedSolving forums — blindsolving threads](https://www.speedsolving.com/forums/blindfold-solving.32/)
  Long-running, high-signal threads on M2, 3-style and 4BLD, including method authors themselves.
  Use for: deep method questions where a wiki page is not enough.

- Blindfolded Cubing Discord — linked from the [Speedsolving thread](https://www.speedsolving.com/threads/blindfolded-cubing-discord-server.76818/)
  Dedicated BLD community, fastest place to get a live answer.
  Use for: "why does my solve keep DNF-ing" style debugging, which is very hard to diagnose alone.

- [WCA competition finder](https://www.worldcubeassociation.org/competitions)
  Use for: finding a local competition holding 3BLD/4BLD when the mission reaches that point.

## Gaps

- No high-trust written source yet for **intuitive commutator construction** at the depth lesson 2 will need.
  The YouTube 3-style series (Part 2: pure corner commutators, Part 3: continued) look promising but are unverified.
  Resolve before lesson 2.
- No verified source yet for **U2 / commutator centre methods** on 4x4 beyond the terse PDF above.
  Resolve before lesson 7.
- Letter-pair memory imagery (needed for the sub-5 goal) has no source listed yet.
  Resolve around lesson 5.