Thank you for the detailed report! Shisen-sho matching has some weirdness especially on layouts that use half-grid spaces, hence why Phone is the only one of those we included. I’ve spent a long time trying to make the matching algorithm both performant and accurate, but in situations like above it can fail. If there’s a 1.2 version I’ll examine this example, but can’t promise it will be fixed (I think a little bit of rare inaccuracy on this layout is okay if it can be performant and work on every other layout).