A simple trap in the lemberger countergambit

This morning I enjoyed a simple victory in the Lemberger.
1.d4 d5 2.e4 dxe4 3.Nc3 e5 4.Nxe4 exd4 5.Bb5+ c6 6.Qe2 (diagram)

My opponent played the second best move here : 6...Be6 7.Bc4
And now fell for the simple trap 7...Bxc4 8.Bf6#

Surely it was just a blitz game, but I have won the same trap in a normal over the board game against an opponent rated fide 1750, so it is \surely not as simple as it seems. Let's look at the possibility starting from move 6.

a. 6...Be6 7.Bc4 (diagram)

...a1/ 7...Bb4+ 8.Bd2
......a1a/ 8....Bxd2+ 9.Nxd2 (+=)
......a1b/ 8....Bxc4 9.Nf6+ Kf8 10.Bxb4+ Ne7 11.Qxc4 (+)
......a1c/ 8....Qe7 9.0-0-0 Bxd2+ 10.Rxd2 (+)
......a1d/ 8....d3 9.cxd3 (+=)
...a2/ 7...Bd6 8.Bxe6 fxe6 9.Qg4 (+)
...a3/ 7...Be7 8.Bxe6 fxe6 9.Nf3 (+=)
...a4/ 7...Nf6 8.Ng5 (+=)
...a5/ 7...Na6 8.Bxe6 fxe6 9.Nf3 (+=)

b. 6...Be7 7.Bc4 (diagram)

...b1/ 7...Bf5 8.Nf3 (=)
...b2/ 7...Be6 8.Bxe6 fxe6 9.Nf3 (+=)
...b3/ 7...b5 8.Bd3 (+=)
...b4/ 7...Nf6 8.Nxf6+ gxf6 9.Qh5 (+=)

c/ 6...Qe7 7.Nd6+ Kd8 8.Qxe7 Kxe7 9.Nxc8+ Kd7 10.Bc4 (+=)

d/ 6...Bb4+ 7.c3 ( there are better ways for white, but this one is the only ones that maintains some winning chances for white ) (diagram)

...d1/ 7...cxb5 8.cxb4 

......d1a/ 8...Ne7 9.Qxb5+ (-)

......d1b/ 8...Nc6 9.Bf4 (=)

......d1c/ 8...a6 9.Bf4 (+=)

......d1d/ 8...Qe7 9.Nd6+ (+=)

......d1e/ 8...Bd7 9.Bg5 (+)

......d1f/ 8...Be6 9.Qxb5+ Nc6 10.Bf4 (=)

...d2/ 7...dxc3 8.bxc3 (=)

...d3/ 7...Be7 8.Bc4 (+=)

...d4/ 7...Ne7 8.Bd3 (=)

...d4/ 7...Qe7 8.cxb4 cxb4 9.Nd6+ (+=)

So we see that the gambit has many traps that may lead so a quick win, but it is not really correct, as it can be refuted, but white is no material down and can still fight back after 6...Bb4+ 7.c3 cxb5 8.cxb4 Ne7 9.Qxb5+ Nbc6 10.Ne2 (diagram)

A blow to the Ziegler

The Ziegler defense ( 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 c6 6.Bc4 Bf5 has always posed a problem to the attacker as the traditional lines 7.0-0 e6 8.Ne5 is insufficient.

However, 7.Bg5 e6 8.Nh4 Bg6 9.Nxg6 hxg6 10.Qd3 (diagram) gives white decent chances.

Blitz play this morning continued 10...Be7 11.0-0-0 and now the new move 11...Ng4 (diagram)

Black wants to exchange some pieces and eyes the f2 square for his jumper - what can you expect more from a move ?

Play went 12.Bxe7 Qxe7 and now I threw in the standard sacrifice 12.Bxe6 (diagram)

Obvioulsy, I was hoping for 13...fxe6 14.Qxg6+ (++), but that would have been too easy.

My blitz opponent played 13...Qg5+ 14.Kb1 fxe6 and now 15.Qg3 (diagram)

Here I thought that white had the advantage, as I have two interesting attacking options
- the knight is pinned and can ve attacjed by means of the simple h3
- my knight can attack the queen with Ne4 and the check on d6.

But it seems that it is actually black who is on top. My trusted silicon assistant gives 15...Qh4 16.Qc7 0-0 17.Qxb7 Nf2 18.Qxa8 Nxh1 19.Qxa7, with black having the piece for two pawns.

Have we discovered the real refutation of white's alternative line in the Ziegler( or O'Kelly ) defense ? It surely looks so....