パズル

These problems, although involving a relatively large number of parts, were desi...

I'd like to conclude the Very Easy problems for now.These problems were simple,...

This is a somewhat tricky question. Please understand it correctly.

The most difficult thing about blindfolded chess is recognizing the diagonals.

I'm not good with the tactics system on this site, so I'll just consider it corr...

The difficult part of solving tactics is not actually solving the problem, but r...