Please refer

http://www.experts-exchange.com/Other/Puzzles_Riddles/Q_23497738.html
One of the correct answer suggested by ozo is

Step 1. b->d->e

Step 2. i->j->b

Step 3. f->h->i

Step 4. c->d->f

Step 5. j->b->c

Step 6. g->h->j

Step 7. d->f->g

In practice, When I try to solve the problem, without seeing the answer, I am always stuck at step

7 or Step 8.

My question now is.

1) Is Starting Position is important, or is it important to place the 1st stone in a particular position. Can a rule be devised to locate starting positoin?

2) Can a rule be devised so that, after each step one can tell, whether the solution is possible or impossible in next steps.

Riddle By Mat

star-and-stone.doc
Sure. Just choose a point ... From that point, you will have exactly two options to place the next stone (no matter which point you chose, there will always be exactly two). Choose one direction, and from then on, you simply follow the same logic. In that next position, you will have two options again. One of these options will be the previous stone though, so you have to take the other. Continue that until all stones are placed.

Note that there are only two variables : the original position, and the original direction you choose.