I think this falls under the heading of "you couldn't make this stuff up"
Introducing ‘Judoku’: Sudoku for Jews
Um, no, I dont think so..................
Instead of simply lining up the numbers one through nine in that familiar 81-cell matrix, puzzle-doers can choose to arrange Hebrew letters or Jewish symbols instead.
Charon promises all users a good time, regardless of religious origin, claiming, “Not Jewish? Don’t worry, you’ll still have fun with this unique and educational puzzle game