Crossing River Puzzle

There are 8 people who have to cross the river on a raft.

1. Policeman (P)
2. Thief (T)
3. Father (F)
4. Boy 1 (B1)
5. Boy 2 (B2)
6. Mother (M)
7. Girl 1 (G1)
8. Girl 2 (G2)

The rules are:

Only two people can cross at a time.
Only the adults  (mom, dad, policeman) can operate the raft.
The father can’t be with the girls unless the mother is there.
The mother can’t be with the boys unless the father is there.
The thief can not be alone with any of the family w/out the policeman.

How do you get them all across?

Answer:

There are 17 steps to get successful cross for all of them.

1. P, T →
2. ← P

3. P, B1 →
4. ← P T

5. F, B2 →
6. ← F

7. F, M →
8. ← M

9. P, T →
10. ← F

11. M, F →
12. ← M

13. M, G1 →
14. ← P T

15. P, G2 →
16. ← P

17. P, T →

 

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