Radioactive Queen Chess
This variant can clearly explain the abolies of each piece in FIDE, and it's based on FIDE. So it can open new frontiers of chess & its variants.
Inspired by Manchurian Chess.
Setup
Karma strikes black back! White hasn't the Queen and minor pieces, but on the first move he/she must drop the unique piece (called Sky Brilliant, Karmium General, Radioactive Queen, Megaqueen, Cyberpiece, Superpiece, etc.; so let's call it Cyberpiece in this article) into any free back rank's square (so it's counted as a turn). Black is the first player to move his pieces.
Pieces
All pieces are as in FIDE except for…
Radioactive Queen
She can seem like Amazon (Terror, Maharaja, Khelgi, etc.) but it's much stronger. If Queen is heavy piece, this one is superheavy piece which can:
- as Knight: move & be placed;
- as Queen: move (incl. Pawn, Bishop, Rook, King moves) & be placed;
- as Rook: move (as Queen does) & allow King's castling to it;
- as King: move (as Queen does), be castled to the rook & be one of the opponent's targets.
As itself, Superpiece has very strong ability. It can capture adjacent piece & move one space in any direction after this (i. e. move twice per turn but only if first move is short-range taking; second move can't be capture).
Castling: black can castle as in FIDE rules. White can castle
- if both his/her pieces (castler & acceptor) hadn't moved yet
- and there's a place between them
even if your King is under check, you can castle to escape, close the line or capture attacking piece. Superpiece can move after castling capture also. Note that you can capture by castling only in case when it's only way to avoid checkmate (if foe piece stands on that square where your acceptor (Rook or Superpiece) will stand after castling) even through this foe piece.
Each piece can castle only once per game (maximum is two castles by white — King-Rook & Superpiece-Rook, and one castle by black). Place of castler & acceptor after castling is defined:
| Distance between castler & acceptor | Castler goes to acceptor's side | Acceptor goes to castler's side |
| 1 | 0 | 2 |
| 2 | 1 | 2 |
| 3 | 2 | 2 |
| 4 | 2 | 3 |
En passant: as in FIDE.
Promotions: black promotes his/her Pawns as in FIDE; white promotes his/her Pawns only to Rooks.
Rules
- Your aim is to checkmate opponent's King.
- If black captures Superpiece, white loses in 5 moves after this move unless black hasn't any pieces (except for pawns) on the board BUT white has (and this is normal pawn or rook endgame) OR game ends earlier. In this case (loss of Superpiece) it ends after black's 5th move (because it can make a draw; white loses only if result is undefined).
- If white's time is over, it's lose even if black can't checkmate.
Draw occurs if:
- It's stalemate.
- Checkmate isn't available.
- Black's time is over but white can't checkmate.
Notes
Karmium is my created name for 119 element — radioactive alkali metal installed in the diamond which Superpiece carries.
There also will be the variants of
Highly Radioactive Queen
where white hasn't even Rooks, but Superpiece has hit-to-run captures on any target square, not only adjacent (in other words, it can do non-taking move after every capture);
Radioactive Queen Mirror
where all setup, pieces & rules related to white are also related to black (with two versions: Pure RQM and light (but maybe hard for someone) version which also allows one light piece (Bishop or Knight) on any back rank's square to every player) and Pawns can promote to Rooks & Doublers (non-royal Kings), in light version - also to that light piece which player owns; and
Radioactive Queen Atomic
where are the capturing rules of Atomic chess.
This 'user submitted' page is a collaboration between the posting user and the Chess Variant Pages. Registered contributors to the Chess Variant Pages have the ability to post their own works, subject to review and editing by the Chess Variant Pages Editorial Staff.
By Lev Grigoriev.
Last revised by Lev Grigoriev.
Web page created: 2023-03-19. Web page last updated: 2023-06-22