I arrange the black four black stones and four white stones on 4 × 4 table in the figure below.
Arrange stones according to the rule that stones of the same color should not be placed in vertical, horizontal and diagonal direction.
Answer
Solution
When one stone is placed at the corner as shown in Fig.1, 2nd stone is to be placed at A or B as in Fig.2 and it is no good.
Then one stone is placed as in Fig.3.
2nd stone can be placed as Fig.4 and 3rd stone as Fig.5.
Answer
Arrange stones according to the rule that stones of the same color should not be placed in vertical, horizontal and diagonal direction.
Answer
Solution
When one stone is placed at the corner as shown in Fig.1, 2nd stone is to be placed at A or B as in Fig.2 and it is no good.
Then one stone is placed as in Fig.3.
2nd stone can be placed as Fig.4 and 3rd stone as Fig.5.
Answer
