Got this evil one from a book. Anybody got any bright ideas?
It does not appear to succumb to any of the normal rules, but I could be wrong
...|..5|.9.
.53|4.2|876
.64|..7|.15
-----------
.29|74.|153
7..|.51|..9
5.1|.2.|.87
-----------
3.2|5..|76.
...|1.3|5..
.85|27.|93.