symmetryKeyfunction

The least spelling of a layout over its eight turns and mirrors: equal keys are the same board. A hexagon is only turned the ways that keep its lattice — half round, and the two diagonal mirrors (a quarter turn then a mirror) — since a quarter turn alone would make its slanting neighbours the wrong pair.

import { symmetryKey } from "@johnmorrisdotca/tsunagi";

function symmetryKey(code: string, size: number): string

import { TSUNAGI_4 } from "@johnmorrisdotca/tsunagi/levels-4";
import { symmetryKey } from "@johnmorrisdotca/tsunagi";

const givens = TSUNAGI_4[0][0];
console.log(symmetryKey(givens,4));

A..AB..BC..CD..D