My own chess variants

As I said earlier, I create chess variants.
This article is second in this cycle, and here I list the games with minimal deviations from usual chess. Some of them were intended to be here, but developers denied my suggestions.
All games here use standard chess setup.

Expansion Chess

This is my earliest ever idea of chess variant.
The rules are simple and like in Chess except for following. Each your piece being on the opponent’s half of board at the start of your move brings to you 1 point. Points are accumulating, and your goal is to collect at least 20 (and more than your opponent) to win (though checkmate also does). More detailed here.

Faceoff Chess

This is also simple and played like Chess except for rule borrowed from Chinese Chess (Xiangqi) and similar games (though I modified it): Kings cannot be placed on one horizontal, vertical or diagonal without pieces in-between (in other words, can attack each other like Queens): and so endgames are completely different, and K vs KNN endgame is not drawn. Can be found here and played via Game Courier.

Eaters (variation of Antiantichess)

Like Chess, but castling is illegal, captures are obligatory, and you must take all the opposite army in order to win (so King is allowed to move into check and can be obtained via Pawn's promotion); the main difficulty is that, if you can take several pieces, you must take the piece with the least value (if they are equal, or there are many pieces with that value, you can choose any of them). Pawn costs 1 pawn, Queen costs 9 pawns, but then values are unstable...

• If one side has equal number of Knights and Bishops, their values are equal. If it has more Knights than Bishops, they are still equal. But if there are more Bishops than Knights, then the latter cost less. Anyway, they cost approximately 3,5 pawns which is more than Pawns but less than others.
• By default King and Rook are equal and both cost 5 pawns, but if Rooks of one color are paired and protect each other, King costs less than Rooks.

Reche’s Super Faceoff Masquerade

All pieces move without capture as in Chess but take differently:

• a-Rook takes as Knight, h-Rook as Bishop;
• b-Knight takes as Bishop, g-Knight as Rook;
• c-Bishop takes as Rook, f-Bishop as Knight.
• Queen takes as King.
• Kings cannot face each other - be on one file/rank/diagonal without pieces in-between (simply, check as Queens); castling still works.

Only Pawns are unchanged (en passant is allowed).
Promotion is possible to every form of pieces (exc. for King).
Endgames with just one piece which takes as Knight or Bishop are draw.

Posted here (currently unpublished, sign in CVP to read). Playable via Game Courier. There’s also a variation with random setup.

Re-Ghost Chess

When any piece is captured, it returns to its owner’s hand as ghost (which cannot take, though still can check the King, but instead it freely goes through any pieces and doesn't block friendly and foe motions, incl. another ghosts). Hand is capable only for one ghost: if another piece is captured, hand refreshes and previous placeholder is eliminated from a game. 5 moves after that last piece is captured, player can drop its ghost on the any vacant square instead of moving (though Pawn cannot be dropped on the opposite half), but only one ghost per side can be on board. It can be taken like usual piece, and then disappears entirely; his owner can drop new ghost only 5 moves after his previous is gone. Pawns' ghosts have double step on nearest two ranks and can promote only to other pieces' ghosts. Full rules here.