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This page is written by the game's inventor, Gerd Degens.


By Gerd P. Degens


The base is a board with 17 ranks and 21 files. In Rombus form, there are 213 playable squares. Each player has 40 pieces.



Standard set of pieces - plus additional pieces. Details in the rule section.


There is no capturing en passant and no castling. Promotion of pawns takes place.
Bare king loses.
Stalemate is a win.


The Pawn (R-Chess) moves as follows:

The pawn moves one, two or three squares forward and captures opposing pieces. Diagonally, the pawn can move one square forward without capturing. It does not jump over pieces.


The archbishop is a hybrid piece of knight and bishop.


The chancellor is a hybrid piece of knight and rook.


The amazon is a hybrid piece of knight and queen.


The cardinalrider is a hybrid piece of knightrider and bishop.
(The knightrider can perform the move of a knight once or several times in sequence. A piece on a target square cannot be jumped over.)

The amazonrider is a hybrid piece of knightrider and queen:


The king can move to an adjoining square.


Play it !
files=21 ranks=17 promoZone=1 promoChoice=RQACZIJ graphicsDir=/graphics.dir/alfaeriePNG/ squareSize=50 graphicsType=png stalemate=win baring=0 royal=K hole::::a1,b1,c1,d1,e1,f1,g1,h1,n1,o1,p1,q1,r1,s1,t1,u1,a2,b2,c2,d2,e2,f2,g2,o2,p2,q2,r2,s2,t2,u2,a3,b3,c3,d3,e3,f3,p3,q3,r3,s3,t3,u3,a4,b4,c4,d4,e4,q4,r4,s4,t4,u4,a5,b5,c5,d5,r5,s5,t5,u5,a6,b6,c6,s6,t6,u6,a7,b7,t7,u7,a8,u8 pawn:P:fWfnDfnHfmF:pawn:i2,j2,k2,l2,m2,h3,i3,m3,n3,g4,h4,n4,o4,f5,g5,o5,p5,e6,f6,p6,q6,d7,e7,q7,r7,,d11,e11,q11,r11,e12,f12 rook:R:R:rook:i1,m1,,i17,m17 queen:Q:Q:queen:j1,l1,,j17,l17 archbishop:A:BN:cardinal:h2,n2,,h16,n16 chancellor:C:RN:chancellor:e5,q5,,e13,q13 amazon:Z:QN:amazon:d6,r6,,d12,r12 amazonrider:I:QNN:amazonrider:g3,o3,,g15,o15 cardinalrider:J:BNN:cardinalrider:f4,p4,,f14,p14 king:K:K:king:k1,,k17

R-Chess (Rombus Chess) on Game Courier

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 Gerd P. Degens.

Last revised by Gerd Degens.

Web page created: 2024-04-07. Web page last updated: 2024-04-07