All the following variants can be played with a standard set of pieces and board.
Valiant Chess - introducing a new pawn move.
Dynamic Chess - introducing a new pawn move (also Chess4).
Fischer Placement Chess - generating a modest subset of Chess960.
Castle Chess - with extended castle rule.
Extrapawn Chess - standard chess with extra pawn.
Chess-9 - rearranging the piece array.
Future Chess - a relocation variant with extra corner squares.
Multi-chess - regroupment in the initial array (Chess57).
Regroupment Chess - regroupment in the piece array (also Chess484).
Configuration Chess - reconfiguring the piece array (also Chess400).
Placement Chess - reconfiguring the piece array (also Chess20).
Arrangement Chess - rearranging the piece array (also Chess100).
Relocation Chess - rearranging the piece array.
Regiment Chess - reordering the piece array (also Regiment Random Chess).
Revised Chess - introducing the revised pawn.
Hopper Chess - introducing the new hop move (Hoppschack)
Elephant Chess - a tranquil form of chess. (Elefantschack)
Orphic Chess - an entrancing chess (Orfisk schack)
Meteoric Chess Drop-chess.
New Chess - drop-chess with pawn relocation (Nyschack)
Gunnery Chess - introducing the cannon pawn (Artillerischack)
Elk Chess - enters the Elk, the King of the Wood (Älgschack)
Improved Chess - an improvement of Fide-chess
Phalanx Chess - introducing the Phalanx pawn
Reformed Chess - introducing swapping pawns
Warlock Chess - introducing the transforming Warlock
Matron Chess - introducing the attacking Matron
Twinmove Chess - a fully practicable double-move chess (Dubbeldragschack)
Chess256 - the end to opening monotony (Randomiserat schack, Schack-256)
Magicpawns Chess - introducing the flighty magic pawn (Den magiska bonden)
Royal CannonChess - introducing the royal cannon move (kanondraget)
Hopper-Elk Chess - a dynamic variant with hopper moves (Älgschack med hopp-drag)
Elkrider Chess - introducing the Elkrider (Älgryttarschack)
Cannonrider Chess - introducing the Cannonrider (Kanonschack)
Magneticpawns Chess - introducing the magnetic pawn
Scorpion Chess - introducing the dangerous Scorpion pawn (Skorpionschack)
Swedish Chess - finally, the “perfect” chess variant. (Svenskt Schack)
Dromedary Chess - the long-leaper unshackled (Dromedarschack)
Geminus Chess - twinmove drop-chess (Geminusschack)
Samhain Chess - in commemoration of the ancient Celts
Shamanic Chess - introducing the shaman piece (Shaman-schack)
Chess-B - a complement to Fide-chess. (Schack-B)
Harpy Chess - introducing the pestering Harpy (Harpya-schack)
Pitcher Chess - introducing the catapult pawn.
Leapfrog Chess - introducing the hopping pawn.
Extrapawn Chess - standard chess with extra pawn.