This is the first of a series of challenges I'll be posting regularly. In this case it is just a simple mate in one. This is the position:
[Title "White to mate in one"] [FEN "1Bb3BN/R2Pk1pr/1Q5B/4q2R/2bN/4Q1BK/1p/1bq1R1rb w - - 0 1"]
White plays and gives mate. It seems very easy but there are a lot of pieces in the board. I'll be increasing or reducing the level of the challenges based on the answers.