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roland_l 53 ( +1 | -1 )
Interesting Dutch-Leningrad variation Q. Okay, so I've been trying the Dutch some, and after games reviewing moves with CM 10 to see where I've gone wrong.

The normal Leningrad (or fianchetto variation) starts 1.d4 f5 2.g3 Nf6 3. Bg2 ..... then something interesting happens. At blacks move 3, CM with much deliberation favors 3. ... c5.

I checked the gameknot db of over 1900 players, and there isn't a single game with this move. I don't have the MCO, but isn't this out of book already with 3. ... c5 for black?
Is it an actual opening? Anyone see any major disadvantages to trying this move?
ccmcacollister 78 ( +1 | -1 )
AS a strategic matter, BL is presenting himself with potential for some very undersiderable centers there. Even to play later, the combination of f5 and c5 is usually considered weak in the Dutch, from what I've seen. And playing it so early you will really be putting a burden of proof upon your self. Condsider how easy it will be for you to be left with either a backwards d or e pawn for instance.
Yet if he gets away with it, then BL's ...c5 does strike at the Bg7 diagonal when he fianchetto's. And undoubtably your position will be better than the one I got trying a c5/f5 center vs Walter Milbratz, a former USA Champ. :)
(To paraphrase JC in John, 'When they hate your move, know that they hated my move before you ... '
Good Luck if you go with it }8-)
ccmcacollister 248 ( +1 | -1 )
MCO-12 I found my older MCO-#12 and did see a few lines using a later ...c5 by BL that may give some idea of the positions using it. They are from page 404 on which columns 7 & 8 are Lenningrad Dutch lines, and these come from #8. (#7 plays Bg7 instead of 3...Nf6 first. :

1.d4 f5 2.g3 g6 3.Bg2 Nf6 4.Nf3 Bg7 5.o-o o-o
The above will be the start position for these lines. Now the first lines given as footnote (f) go :
[6.d5 d6 will end up assessed unclear later. With any of these as 6... called "safer" b6/a5/c6 ]
6.b3 d6! 7.Bb2 --c5-- 8.c4 Nc6 9.e3 e5?!
6.b3 Ne4 7.Bb2 --c5-- 8.c4 Nc6 9.e3 +-
Back to the start position and the alternative line begins with 6.c4 d6 7.Nc3! Nc6 8.d5! Na5 9.Qa4 --c5-- 10.dxc6 bxc6 11.Nd4 Bd7 = Kuzminikh
From a glance at this postion {or maybe one that would result without 10.dxc6 perhaps Nd2 or Nel similar to moves in WT's Classical set up vs the Mar del Plata}, it seems uncomfortable and unclear to Me...even tho I am also very familiar with the KI and all the Dutch Vars except the Lenningrad. Like one of those where you ask yourself "Who stands less bad" rather than who is better. But that can be a good thing. If it is truly equal as the assessment suggests, then it may be an opportunity for a position you would understand better than most opponents, that might also make them discomforted, which I've always felt is a factor conducive to producing opp.errors.
It seems to me that the line ending in 9 ... e5 demonstrates the type of center situation you may be dealing with right before and after than move. Of course if WT would be obliging enough to play 10.d5 in reply then BL seems to have a very nice KI type of K-side attacking position, with WT being behind in progress & less well prepared to try generating the Q-side type play of the KI. Except for a couple
little quirks to be considered. Such as if 10.d5 is Nb8 needed, which doesnt give BL as much attacking lead I think.
Or can 10...Ng5 be played after all ? If so BL would seem to have it all his way, except for 11. Ng5. That looks pretty interesting. For EG 11.... Kh8 12.Ne6 Bxe6 13.dxe6 Qc8 14.Bd5 and I wonder if BL could actually play around the e6 obstruction for his K-side attack? Almost but dont think so. Yet now 14...Ne8 for Nc7 going for the pawn-e6 directly instead of the Bd5 looks pretty good. But there remains a question of just how tied down to the d6 pawn/Sq can BL be kept then the d-file opens ? How much it hinders his own attack or allows WT's to generate upon open d-file instead of Q-side pawn roller.
Then back to Earth tho. Wt probably skips playing d5 anyway and wants to open & build on the d-file anyway,
The complexities are nice if they can be resolved to BL satisfaction by someone with a less superficial look .