import { ChessRules } from "@/base_rules";
-export const VariantRules = class ThreechecksRules extends ChessRules {
+export class ThreechecksRules extends ChessRules {
static IsGoodFlags(flags) {
// 4 for castle + 2 for checks (0,1 or 2)
return !!flags.match(/^[01]{4,4}[012]{2,2}$/);