The Ising Model: Colour to Break the Race

Metropolis on a lattice of spins, the race that makes an all-at-once update silently wrong, and the checkerboard that repairs it — ending in a temperature slider you can drag through a phase transition.

6 tasks

1. What a Flip Would Cost
2. Randomness Without a Random Number Generator
3. Everyone at Once Is Wrong
4. Colour the Lattice
5. Two Halves Make a Sweep
6. Drag the Temperature Across Tc

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