1.e4,e5 2.Nf3,Nc6 3.Bc4,Nf6 4.d3,Be7 5.c3, d5!? (@ I entirely agree with MNB on this line; it more or less follows Tarrasch maxim,
that in the open games c3 is almost always bad and should be answered by d5).
Earlier this year played an interesting corr. game in this line, that didnt resemble the Marshall at all.
White is the 15 years old A. Kachko (FM) from the Russian Federation 6.exd5, Nxd5
7.Qb3!? After the normal 7.0-0 black can equalize with either 7...0-0 or 7....Bg4.
White's reason for playing like this was probably that black was defeated in an earlier game,
where he didnt get enough compensation for a sacced pawn.
7........, 0-0! An already know temporary piece-sac
8.Bxd5! 8.0-0?!, Nb6 is particular good for white white
8........, Na5 9.Qb5!? 9.Bxf7+, Rxf7 10.Qc2? (Qb5) ,Bf5! =+ (Tomashevic-den Ouden, corr.
1975)
9........, c6!
10.Bxf7+,Rxf7
11.Qxe5 r1bq2k1/pp2brpp/2p5/n3Q3/8/2PP1N2/PP3PPP/RNB1K2R b KQ -
http://www.france-echecs.com/diagramme/imgboard.phpfen=r1bq2k1/pp2brpp/2p5/n3Q3/... This position had been reached earlier, in Mahjoob-Khagani, Theheran 2003.
The game continued with 11....Bg4!? 12. Qd4 (Qe2!),
Bxf3 13.gxf, Qc7? (13...Qxd4! with compensation)
After 14.Be3, g5? black quite soon lost the game. I knew this game and was ready with a small novelty
11......, Qd3!? TN 12. Qxa5? White goes wrong immediatialy: 12.Qe2!,Qg6 13.Nbd2,Bf5 with compensation
12......,Bg4! Now black has a very strong attack, and white's queen has only a few fields:
13.Nbd2, Bd6 14.h3, Re7+ 15.Kd1,Re5! -+ was my main variation.
13.Be3 and 13.h3 both invite the strong sac 13...Rxf3 and after 14.gxf3,Bxf3 the end is coming soon. 13.Qe5, Bh4 Threat 14.....Re7 winning the queen.
14.Be3, Rxf3
15.gxf , Bxf3
16.Bd2,
r5k1/pp4pp/2p5/4Q3/7b/2Pq1b2/PP1B1P1P/RN2K2R b KQ -
http://www.france-echecs.com/diagramme/imgboard.phpfen=r5k1/pp4pp/2p5/4Q3/7b/2Pq... In this position I made quite a blunder, missing an easy win a silicon monster will show
you in milliseconds. I guess that having sacced a full rook, I simply was relieved to get
some material back, and stopped looking for better alternatives. 16....Qg6! 17.Be3,Re8! 18.Qd4,Bxf2+ would have won in a few moves. This is someting you might overlook in an OTB-game, but in corr. chess there is no excuse!
Fortunately luck was on my side. My next two moves didnt throw away the win.

.
16......., Bxh1?
17.Qe2! ,Qg6? The right idea at the wrong time (17...Qd5)
18.Qc4+, Bd5
19.Bxh4, Qg1+
20.Ke2,Re1+
21.Be3, Qc1! This was my piece of good 'luck': Black wins the a1-rook and the game.
4r1k1/pp4pp/2p5/3b4/7Q/2P1B3/PP2KP1P/RNq5 w - -
http://www.france-echecs.com/diagramme/imgboard.phpfen=4r1k1/pp4pp/2p5/3b4/7Q/2P... 22.Qb4, b5
23.b3, Qb2+
24.Nd2, Qxa1 And black, now being an exchange up won after 15 more moves.
The technical fase was not very difficult (and not particularly interesting).