A king that is attacked three or more times is not considered to be in check.Henk Le Grand, the Netherlands
Bosma Chess. White to mate in two moves.
1. ..., Bd8 2. f8R mate
1. ..., Qxd7 2. f8N mate
1. ..., Nd6 2. f8B mate
Note that after the three different ways black can prevent the threat 2. Re8, white mates by the three different minor promotions.