This is the solution to the puzzle of the week #2.
Red plays at 5, which prevents Blue 4 from connecting to either side. Here are some of the sequences:
|If Blue 6 as shown here, Red 7 cuts off that side, and allows Red to make territory with either D or E; Blue can only block one of them. (He should block D) There are variations on this if Blue 6 plays at 7 instead.||
|If Blue 6 on the left, then Red 7 cuts off that side, and Red can make territory at D or E.|
|Blue’s best response to Red 5 is probably here. Blue 6 still forces Red to respond with 7 — anything else and Blue 8 at D captures Red. Then Blue 8 takes 5 points back.|
|If Blue plays at 6, Red 7 can make territory at either D or E, and Blue can prevent only one of them. This scenario can also result in 5 points for Blue.|