This is a quick and dirty walkthrough for Fourbyfouria normal and hard modes, without any explanations. Knight stalemate: place n/s/place k/a1/place k Bishop stalemate, normal mode: w/place b/se/place k/a1/place k Bishop stalemate, hard mode: place k/s/place b/s/place k Knight vs. knight checkmate, west: s/place k/nw/place n/sw/place n/s/place k Knight vs. bishop checkmate, southwest: s/place n/s/place k/a2/place b/s/place k Bishop vs. bishop checkmate, north: place b/s/place k/a2/place b/s/place k Bishop vs. knight checkmate, northeast: s/place k/w/place b/w/place n/s/place k. There are several alternate solutions below. I'll go with the ones I used in my Inform sanity-test code. Two knights checkmate, south, normal: place n/w/place n/w/place k/a1/place k Two bishops checkmate, east, normal: place b/s/place b/a3/place k/a5/place k Bishop and knight checkmate, southeast, normal: place b/w/place k/w/place n/a5/place k Two knights stalemate, south, hard: place k/sw/place n/d2/place n/sw/place k Two knights checkmate, south, hard: w/place n/sw/place k/e3/place n/c1/place k Two bishops stalemate, east, hard: place b/w/place b/a1/place k/c1/place k Two bishops checkmate, east, hard: e/place b/a3/place k/se/place b/s/place k Bishop and knight stalemate, southeast, hard: a3/place n/a1/place b/e1/place k/c1/place k Bishop and knight checkmate, southeast, hard: place k/e/place n/sw/place b/s/place k