2nd week.

Time for solutions:

The positions given by coordinates:

Ra1

Bc1

Ke1

f2

h2

Ne3

Qg3

a4

Ke8

Bf8

Rh8

e7

c7

Qb6

Ne6

h5

And for the second challenge there are many right answers.

Many times Chess is very close to Maths and there can be more than just one option.

Here you are mine.

The 8 Queen problem was first suggested in 1848 and solved in 1850. So I have placed 8 Queens.

If you want to know a little more there are plenty of examples, I REPEAT This is not the only solution and there can be placed more than 8 Queens.

For instance I wanted to post some of your solutions... Don't get angry if yours is not here because there were plenty of them.

 Bichito 37

El Riojano

 Little Mermaid

 Medio Melé

 Spiderman

 Samuelov

Pikachu

One more, very important, thing: I'd rather prefer not to paste pictures with real names or photos.