Koba makes it.

The puzzle was very simple. All you had to do was to find the same dog as the sample shown in the left upper corner in the right picture.

The problem was there were tons of dogs resembling the sample dog that had a unique pattern in its tail. I thought that it would not take a while to find it when I started trying. However, I failed on that although I had made every endeavour over a period of one year.

To my big surprise, my elder son, 12 years of age, DID it within 10 minute. What an ability you have. Fantabulous, KOBA!

I won't forget that moment you told me in a calm tone, "Dad, Here is the dog."