.

.

I Hope I haven't missed anything

Also, I meant 5... Ne2+ is mate in 4

Shoopi , you are right - 1...Nxe3 wins the game for Black.

Sweet. I was thinking about 1... Nc3 at first but 2. Bd2 seems to be white's only saving grace (these are the variations I saw):

My next question is : Can here 1...Ke7 win the game ?

Mate in 8: 1...Nc3, 1...Nxe3

Mate in 5: 4...Ne3+, 4...Qd3+, 4...Qg4

Mate in 4: 5...Qd3+, 5...Qb5+

Mate in 3: 6...Qg6+, 6...Qe2

Sherlocks_Holmes: Not forced.

Yes Thaddeus_Samson ,   I agree - not forced , but is it possible at all ?

White can play  2.Qxa7  or  2.Qb7 .

I think black has a slight advantage after Ke7. Anything is possible with correct or incorrect play.

Yes , it is possible - insecure position of white king is may be the main advantage for black.

thanks...

All this begun with this position :