Avoiding the anti-Dutch lines while playing the Leningrad Dutch?

I play the Classical Dutch a lot, and I always play e6 before f5, so I don't have to learn how to play against the anti-Dutch lines (Staunton Gambit, g4, etc). I've been curious to try out the Leningrad variation, but I'm just wondering if there's any move order to play it while still avoiding the anti-Dutch stuff that can come up if you play f5 on your first move.

The only possible way is to start off with 1...e6. GM Mihail Marin covers this approach in his modern-chess database. I don't know of any other resources off the top of my head because all my books cover the 7...Qe8 or the trendy 7...c6 line.

There is, but like the classical and Stonewall, you have to allow a transposition to a KP opening, and in this case, and FAR WEAKER king pawn opening, which means 2.e4 will be FAR more frequent.

1.d4 g6 2.c4 (2.e4! forces you into the Modern Defense and you will get this FAR more often than you do the French Defense after 1.d4 e6 2.e4) f5 followed by 3...Nf6.

Most leningrad players will play 1...f5 and deal with the Anti-Dutch lines while Classical and Stonewall Dutch players, myself included, will often start 1...e6. The French is far more sound than the Modern.

Myself as White, I play 2.e4 against both 1...e6 and 1...g6. You play 1...f5, you'll get 2.Bg5 from me.

There are a few things white can play after 1. d4 f5, rather than letting black play the normal Dutch positions they want. This includes the Staunton Gambit (2. e4), and oddball lines like 2. g4, 2. Bg5, 2. h3, etc.

There are enough of them that I just don't want to have to spend time learning to play against them all, which is why I've always played e6 before f5 when playing the Classical Dutch.

That is correct. After 1.d4 e6, black invites a French Defense transposition via 2.e4.

I play the French as my main defense against 1. e4, so I actually hope that happens. But it never really does.

https://tinyurl.com/27rnkkbx

This was mentioned in #2.

Have you considered the Nimzo-Dutch?

Can't you try the Leningrad setup against 1. c4 and 1. Nf3 ? Of course you have to deal with d3 lines, but maybe it's not that big of a problem.

There's also the Bogo-Dutch that isn't all that well known amongst players. There's a 170 page book on it on Amazon (and probably other chess book sellers have it but I haven't looked) with sample pages to look it over. It starts out 1 d4 e6 2 c4 f5. It also covers when white doesn't play 2 c4. It's not going to cover 2 e4 though.

You can. Most of the lines that start with 1.c4 will either turn into a Botvinnik System, Transpose into potentially dangerous 1.d4 2.c4 and 3.Nc3 lines, or there will be lines where white focuses primarily on queenside play with a b4 push.

1.Nf3 might be a little trickier to deal with. In addition to the the Lisitsin Gambit, black has to be careful of the 1.Nf3 f5 2.d3 move order (A la Carlsen-Dolmatov 2004 Moscow). The suggested approach is to play 2...Nc6 when the game can either have a Classical Dutch flavor, or a Latvian Gambit Declined style of position.