I suppose the idea now is that when the white King is put on a positive field one must capture it with a positive piece to kick it off, before it can be captured by a neutral or negative piece? That still seems hard; since 1/3 of the squares have positive field, the King will almost always have the choice to step back on one, to make it immune to check again.
I suppose the idea now is that when the white King is put on a positive field one must capture it with a positive piece to kick it off, before it can be captured by a neutral or negative piece? That still seems hard; since 1/3 of the squares have positive field, the King will almost always have the choice to step back on one, to make it immune to check again.