Star Trek Tri-Demensional 3D Modification compatible with Fidchell (Mythus) Chess and many other chess variants
Tuesday, February 27th, 2007I think these can be merged to form ‘Tri-Dimensional Fidchell’. Fidchell is in the Appendix of the “Epic of Aerth”, a worldbook describing a high-fantasy paralell-universe version of earth for the Dangerous Journeys based roleplaying game called Mythus, written by Gary Gygax (I personally see it as a sucessor to Dungeons & Dragons). Normal chess is a 2-D 8×8 board with 16 men of 6 types per side. Fidchell is a 2-D 12×12 board with 32 men of 16 types per side plus 4 additional off-board men of 2 types per side.
The Orthodox2D to Trek3D rules mutation is mutating the 8×8 2D board to 3 fixed 4×4 boards with even-numbered height coordinate designations and two 2×2 movable boards (per player) that mount to the outside corners of the fixed boards and have odd-numbered height designations. It uses the same peaces as it’s 2-D counterpart and leaves the move-rules all the same except for rules for z-access movement (a moveable board must be between the two fixed board that you want to transition between).? The starting columns a-b and g-h are on the moveable boards instead. The number of squesrs on the 2D 8×8 and the 3D are the same (3×4x4 + 4×2x2 = 3×16 + 4×4 = 48 + 16. = 64). A3-A6 / B3-B6 / G3-G6 / H3-H6 are on the netural fixed board instead.
Fidchell would do the same thing when applying the Trek3D mod template to it. It would be 3 fixed 6×6 boards and 4 (2 per player at start) moveable 3×3 boards, utilizing the same peices as the original Mythus-Fidchell 2D version. 2D 12×12=14. 3D: 3×6x6 + 4×3x3 = 3×36 + 4×9 = 108 + 36 = 144). A4-A9 / B4-B9 / C4-C9 / J4-J9 / K4-J9 / L4-L9 are on the neutral board.? As the portals on fidchell are completely on the middle six columns (D-I) and thus are easily mappable to the fixed boards, the portals rules should adapt quite well when applying the Trek3D modification to the Mythus-Fidchell chess variant. The Subterannian portals will more likely apply to the middle four squares on the neutral fixed board though, going by the center territory principle of their location on the 2D board even though the coordinate mappings (E6-E7 / F6-F7) are actually the middle two columns on the forward most rows on the blakc/white fixed boards.
Tri-Dimensional Fidchell chess or ‘Start Trek Mythus-Fidchell’ would be truely complicated indeed that only true geniuses would be able to master (not me, i’m just above average). Larger board (12×12 vs 8×8), double the piece count (plus 4 more peices that startoff-board ), triple the piece types, more promotions. Then add the 3D and moveable boards from the star-trek tri-dimensional chess mod.
Also Since the Trek-3D mod doesn’t alter any of the original pieces or their moves, it should be compatible with many other chess variants that are out there, turning them from 2D to 3D, likely with the same fan-collector’s chess set as many don’t change the board (bigger board, round, octogon, ‘plus shape’, etc).

