I stayed at Barcelona for couple of days and visited Sagrada Familia at the time. It was a memorable place, sacred, peaceful, and inspiring. The atmosphere created by light and shadows and the the tree like ceiling structure are meant to be remembered forever. The photos cannot convey even 1 percent of the beauty and I recommend everyone visit the place.

It was interesting and kinda of surprising that there exists a square at the entrance of Passion facade

You can notice the sum of the rows, columns, and diagonals sum to `33`

, representing the age of Jesus when he died for us all. Christianity does not click with me, so I thought it would be cool if I can make a square that carries an important number for everyone.

I did some research, and it looks like some specific magic squares can be solved with a pretty easy algorithm. Below is just a sketch of a depth first search. You can try with small numbers, because big numbers can blow up the browser and crash the tab 🤣. The current result squares have their rows, columns, and two diagonals added up to the same magic number.

I may try to find something to speed up the computation. Till then,