How easy?

Originally posted by Wulebgr
White to move.

[fen]8/8/8/7P/3nk3/p5K1/8/3R4 w - - 0 1[/fen]

I think that this problem teaches an important tactical idea, bit should not be too difficult for the elementary kids I'm teaching. What do you think?

Ah, OK.

Originally posted by vipiu
I do not like this problem...many moves are easily winning for white...a good problem is that one where there only one better than the rest move!

Or perhaps?

White to move