Solve critiques told me I can't plan my cross in inspection, so I built a trainer to fix it

vnsalaryman

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Joined
Mar 6, 2026
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17
Location
Vietnam
A few weeks ago I posted some solves on Reddit for critique and clearly I was failing to plan the full cross during inspection.

So I built a cross trainer that works backwards from the goal:

You pick the optimal cross length (2–7 moves), and it only generates scrambles which optimal solution is exactly that length.

Other things it does:

  • Any cross color, any front face. For color-neutral practice and matching your grip.
  • Highlight the 4 cross edges + center of your chosen color, so beginners can see the target pieces without doing the mental rotation. Toggle off when you want the real thing.
  • On-screen notation keyboard — tap u/D/R/L/F/B with prime/2 variants instead of fighting the phone keyboard.
  • 3D playback of your solution and the optimal one side by side.
  • Solution checker that validates the cross is actually solved and shows your move count vs. optimal.
Free, no signup: https://subx.guru/cross-trainer
 

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