💡📝H. G. Muller wrote on Sat, Jul 25, 2020 09:21 PM UTC:
OK, I see what the problem is. The diagram assumes by default that the symmetry is 'mirror', while I thought it would assume 'none'. When symmetry=mirror, when setting up the initial position it automatically places a black piece opposit to every white piece it places. So that you only have to specify the locations of the white pieces. This can overwrite any black piece it placed before. If the position was really symmetric, that would not matter, because it would be the same piece. But otherwise it depends on the order the pieces are placed which black pieces are overwritten, and which not.
The Applet should have included symmetry=none in the HTML description of the diagram when the 'asymmetric' checkbox is ticked, to suppress this behavior. I will make the Applet do that, but you can fix your existing diagram by just adding this line.
As for the castling: the default move for a King (as it is specified in the piece table) is KisO2 (or on wider boards KisO3 or KisO4). The isOn means castling with n King steps. I you don't want castling, the King would have to have just K as move. There is no non-castling King in the table, so you would have to alter its move. The Applet does allow you to alter the default move of a piece; for many pieces there even isn't a valid default move. E.g. I would not know how an Ox moves. (Perhaps there should be a separate non-castling King in the table, as this seems a case that would be frequently needed, just like there is also a shatranj Pawn without double push. But then I could not start with two Kings on the board, as they might be the wrong type of Kings...)
OK, I see what the problem is. The diagram assumes by default that the symmetry is 'mirror', while I thought it would assume 'none'. When symmetry=mirror, when setting up the initial position it automatically places a black piece opposit to every white piece it places. So that you only have to specify the locations of the white pieces. This can overwrite any black piece it placed before. If the position was really symmetric, that would not matter, because it would be the same piece. But otherwise it depends on the order the pieces are placed which black pieces are overwritten, and which not.
The Applet should have included symmetry=none in the HTML description of the diagram when the 'asymmetric' checkbox is ticked, to suppress this behavior. I will make the Applet do that, but you can fix your existing diagram by just adding this line.
As for the castling: the default move for a King (as it is specified in the piece table) is KisO2 (or on wider boards KisO3 or KisO4). The isOn means castling with n King steps. I you don't want castling, the King would have to have just K as move. There is no non-castling King in the table, so you would have to alter its move. The Applet does allow you to alter the default move of a piece; for many pieces there even isn't a valid default move. E.g. I would not know how an Ox moves. (Perhaps there should be a separate non-castling King in the table, as this seems a case that would be frequently needed, just like there is also a shatranj Pawn without double push. But then I could not start with two Kings on the board, as they might be the wrong type of Kings...)