Will be used for variants with custom non-rectangular board (Hex, at least)
Or, with other board shapes (see greenchess.net for example)
-Merge variants 1, 2 (3) into one with sub-variant selection when starting a game (New Game + vs engine + analyse)
-E.g. Checkered 1 & 2 into one, and so on.
-Need additional field in variant code... in a generic way (radiobutton or select or checkbox?)
+Merge Orda + Empire + Hoppelpoppel + Newzealand getSlideNJumpMoves() into base_rules.js
+=> allow to simplify getPawnMoves in RoyalRace (and some getXMoves in Shatranj)
+
+Option "free placement" in Hidden
#New variants:
Chessplode
Tablut
+New stealthbomb mode, explode when capture enemy bomb (always on pawn)
+
https://brainking.com/fr/GameRules?tp=128 Massacre Chess
-CWDA : need game options (also useful at least for Monster)
PizzaKings https://www.chessvariants.com/unequal.dir/pizza-kings.html
https://en.m.wikipedia.org/wiki/Chess_with_different_armies#Pizza_Kings%5B11%5D_(John_Lawson)