thank for helping........edit completed

Black can hold against this.

nice one,thanks for sharing

My diagram box isn't working right now, but I'll post a reply when it does.  There's a way to stop this, but I think White has a different forced sequence... I'll show you later.

HUH? Bxd7#? why not Nxd7?

Qc8#.

i think theres a flaw in your puzzle....

1. Qc3... Bd7

2. Qc7+..Ke8

3.Qc# Black's Bishop is on pin, thus it cannot capture the queen on c8+#

Bd7+ is not a mate because Knight can still capture it ...nxBd7

Qc8+... RxQc8 yours is about 5 moves to mate.

Rxc8#  Don't take the hard way in playing chess, why give chance for opponent to recover... simplify.

Try to make combinations without conflict. 

Black can also reply ...Kc6 which can buy time preventing mate, and with a wrong attack would lead to completely repelling the possibility of mate at all

God2 wrote:

thank for helping........edit completed

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 Why not 3. Qc8 # ?

in the first one Bxd7 isnt mate black could kill the bishop

 

finally,I edit completed

There is two ways, not the best. But very well, NICE JOB!!

great puzzle