Turns out there also was a cbMoveMidZ definition in grid-board-view.js, which overrules that in base-view.js. So I made the improvement there. I think the new version should almost always be satisfatory. I just have to solve one tiney problem: when a piece slides to a destination a (2,1) leap away, the animation takes an orthogonal step first, This is wrong for the Griffon. (For more distant destinations of bent sliders it takes the smallest leg first, which is always OK.) I should still implement some guidance there, as it should be clear from the move graph what the first step of the move was.
Turns out there also was a cbMoveMidZ definition in grid-board-view.js, which overrules that in base-view.js. So I made the improvement there. I think the new version should almost always be satisfatory. I just have to solve one tiney problem: when a piece slides to a destination a (2,1) leap away, the animation takes an orthogonal step first, This is wrong for the Griffon. (For more distant destinations of bent sliders it takes the smallest leg first, which is always OK.) I should still implement some guidance there, as it should be clear from the move graph what the first step of the move was.