Thanks again, 12.e5 indeed is stronger than 12.Rd2. The fact, that 12.e5 must be played after 10...Be7 but not after 10...Nf6 is a bit counterintuitive. It has to do with the less protected knight on d7.

The ...Qb6 line is harder to crack, I am afraid.

10.Bf4 Be7 11.Rfd1 Qb6 12.a4 b4 13.a5 Qc7 14.e5 d5 15.Na4 Qxa5 (Nh6 16.Nd4 0-0 cannot be good, as the Black king is in continuous danger) 16.Rdc1

a)16...Qb5 17.Qd1 Rc8 18.Nd4 Rxc1 (Qa5 19.Nc5) 19.Rxc1 Qa5 20.Nc6 (20.Qh5 g6) Bxc6 21.Rxc6 Qb5 and now what?

b)not the bold 16...Qd8!? 17.Nd4 h5? intending 18...g5 because of 18.Nc6, but Qd8!? 17.Nd4 Rc8 18.Qh5 Kf8 and again I am not sure of White's compensation. Two pawns are quite a lot.

My problem here is, that I don't like White nor Black! It will take a lot of time to develop those two pieces on g8 and h8. At the other hand Na4 is not on an optimal square either.

So maybe 12.a4 b4 13.a5 Qc7 14.e5 d5 15.Nxd5 is the way to go?

a)15...exd5 16.Bxd5 Bxd5 17.Rxd5 looks critical. Black has quite a few reasonable moves: Nf8; Qb7; Qc6. White may try 16.Rxd5 Nc5 17.e6 Qxf4 (Nxb3 18.exf7+ Kxf7 19.Rf5+ Nf6 20.Bxc7 maintains the attack) 18.Rxc5 Bxc5 19.exf7+ Kf8 20.fxg8Q+ Rxg8 21.Qc2 though.

b)15...Bxd5 16.Rxd5 exd5 17.Bxd5 and Black has a little problem with pawn f7.

This looks more promising for White than 15.Na4. I am glad I could return your favour.

I have also looked at 10.Bf4 Nf6 11.Rad1 Qb6 (never played before, afaIk)

a)12.Rd2 (this plan is not as good as after 11...Qb8) Be7 13.Rfd1 b4 14.Na4 Qb5 (and this is the reason why).

b)12.Nd5 exd5 13.exd5+ Kd8 (Be7 14.Rfe1 is line c) 14.Ng5 Kc7 15.Nxf7 Rg8 16.Be3 Qa5 17.Bd2 Qb6 and White has at least a draw and likely more.

c)12.Rfe1 Be7 (b4? 13.Nd5 is what White wants) 13.Nd5 exd5 14.exd5 Ng8 (this move shows, why I am interested in 10...Be7 iso 10...Nf6) 15.Nd4 Kf8 16.Nf5 Ne5 (only move) 17.Bxe5 dxe5 18.Qxe5 Bf6 19.Qf4 and Black's problems are not over yet.

Well, well, the Morragambit looks in good shape again, as we have found good ways to combat the problem defences of the last few years: the 6...a6 variation (see my modest contribution in the Hague-Überdeker thread), the 7...Nge7 8.Bg5 f6 variation (based on Zacharov's knight sac 11.Nd5, see also the recent game Zelic-Martinovic, Split 2007 and News since Langrock's book thread) and this early a6, b5 variation.

Mission accomplished.

Very satisfactory.

But where remains Überdeker, to defend the honour of the Sicilian?