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Stairchess.

Chess on a ladder-alike tilted board. (8x8, Cells: 64) [All Comments] [Add Comment or Rating]

HaruN Y wrote on Wed, Apr 24 07:48 AM UTC in reply to H. G. Muller from 07:02 AM:

Talking about the background it doesn't seem to work on my device even though it used to work. Interactive Diagrams that use backgrounds like Eurasian Chess, Chak, VaoQi don't seem to have backgrounds on my device.

H. G. Muller wrote on Wed, Apr 24 07:02 AM UTC in reply to HaruN Y from 06:49 AM:

I beat you by 4 minutes! :-)

It is interesting how we both chose a different rectification of the board; mine spoils the coordinates, yours spoils the moves of the pieces. In your representation it would in principle be possible to use a whole-board image as background that has the original diamond-shaped cells.

I tried using the Atlantic SVG set through fen2.php, but this set is not suitable for use on a black-and-white board. (Alfaerie doesn't do so well either, on the dark squares...)

[Edit] Concerning Pawn: Ah yes, I had overlooked that detail in the description. Thanks!

HaruN Y wrote on Wed, Apr 24 06:49 AM UTC:

Stairchess960

files=8 ranks=8 promoZone=1 promoChoice=NBRQ graphicsDir=/graphics.dir/ squareSize=50 graphicsType=gif symmetry=rotate royal=K whitePrefix=magnetic/W blackPrefix=magnetic/B firstRank=1 rimColor=#13131c darkShade=#424249 oddShade=#717177 lightShade=#a1a1a4 coordColor=#d0d0d2 borders=0 shuffle=N!BRQK Koval Pawn:P:frlmK*fceW:Pawn:a2,b2,c2,d2,e2,f2,g2,h2,,a7,b7,c7,d7,e7,f7,g7,h7 Kovalry:N:flbrFrflbNfrblCfrblZ:Knight:b1,g1,,b8,g8 Koval Bishop:B:vRfrblNN:Bishop:c1,f1,,c8,f8 Zig-Zag:R:frblsQ:Rook:a1,h1,,a8,h8 Koval Queen:Q:RfrblBfrblNN:Queen:d1,,e8 Koval King:K:WfrblFfrblNisO2:King:e1,,d8

To BenR: Maybe this can be both?

To David mRcpR: Why is that a problem? What about Pawn on h-file which cannot move forward?

Edit: I didn't see HGM's Interactive Diagram when I was creating an Interactive Diagram for this.

To HGM: Shouldn't the pawn be iiflmnDflmWflceF?

H. G. Muller wrote on Wed, Apr 24 06:45 AM UTC:

files=15 ranks=8 promoZone=1 promoChoice=NBRQ graphicsDir=/graphics.dir/alfaeriePNG/ squareSize=50 graphicsType=png lightShade=#000000 darkShade=#ffffff firstRank=1 borders=0 useMarkers=1 rimColor=#c0c0c0 holeColor=#c0c0c0 symmetry=none royal=K hole::::a1-d4,l5-o8,e1-f2,a5-b6,n3-o4,j7-k8,a7,c5,e3,g1,i8,k6,m4,o2 pawn:P:iiflmnDflmWflceF:pawn:g2,h2,i2,j2,k2,l2,m2,n2,,b7,c7,d7,e7,f7,g7,h7,i7 knight:N:N:knight:i1,n1,,b8,g8 bishop:B:B:bishop:j1,m1,,c8,f8 rook:R:R:rook:h1,o1,,a8,h8 queen:Q:Q:queen:k1,,e8 king:K:KisO2:king:l1,,d8

David Cannon wrote on Wed, Apr 24 03:29 AM UTC:Good ★★★★

This is an excellent concept. There's just one tweak I'd like to see. Pawns on the a-file cannot move any further to the left, so that could be a problem. One way to remedy that might be to divide the board vertically down the middle, giving pawns on files A-D a move to the RIGHT, and on files E-H to the LEFT, as you have currently done for all pawns.

Ben Reiniger wrote on Tue, Apr 23 10:01 PM UTC:

I filled in the board size metadata as 8x8, but perhaps it would be better as 8x15 (still with 64 cells)?

💡📝Max Koval wrote on Wed, Feb 7 01:33 PM UTC in reply to A. M. DeWitt from Fri Jan 26 12:49 AM:

Diagrams redone.

This rule can be extracted from the description, which states that pawns are capable of making multiple double steps.

🔔Notification on Wed, Feb 7 01:33 PM UTC:

The author, Max Koval, has updated this page.

A. M. DeWitt wrote on Fri, Jan 26 12:49 AM UTC:

This is almost good enough to be approved.

I would recommend having an image showing the Pawn move, which would help explain the difference compared to standard Chess.

Also, if the left horizontal double step is allowed, then it may be wise to adopt the rule from Glinski's hexagonal chess, which allows Pawns that end up on the starting square of another Pawn to make a double step from that square, so you don't have to keep track of which Pawn started where.