Build the right block — without breaking the left
After the First Block everything changes: the left brick is done and must survive every single move. Your safe tools are R, U, M and the wide r — nothing else. These lessons cover what changed, which moves preserve the block, how to pair pieces, and the insertion tricks for the front and back slots. The finished First Block is shown dimmed: locked. Grayed-out pieces belong to later stages.
Section
Lesson
Bright = right-block pieces. Dimmed = locked First Block. Gray = later stages.
Loading cube engine…
Start
Scramble
Lesson intro
Alternative paths
Common mistakes
Practice with the First Block done
Every attempt starts from a curated “First Block solved, rest scrambled” setup. Build the right 1×2×3 — if a move breaks the First Block you get a warning and can undo it with one tap.
Bright = right-block pieces. Dimmed = locked First Block. Gray = later stages.
Loading cube engine…
! That move broke the First Block.
No setup yet.