The most underrated opening, h3 against the dutch !?

Looking at lichess statistics the most likely thing to happen. Even at 2500 classical on lichess this is the most stasticically likely position to reach after d4, f5, h3!!

Yup, I checked as well. ALL the way till that 2500+ level this trap works. Absolutely crazy.

People don't play traps often against Dutch players so we have to keep reminding ourselves of how to play a game we infrequently face. Also, not everyone who plays the Dutch plays it exclusively so they may also have less exposure to the trap. There are 4 main gambits/traps to remember Korchnoi attack (yours), Krejcick Attack 2.g4), Staunton Gambit (2.e4) all from d4 and Lisitsyn Gambit for 1.Nf3 f5 2.e4. Everything else we expect to play against and do often.

you forgot the hopton attack

Hopton attack isnt really a gambit, it is it's own line in the Dutch and occurs more often than the gambit lines.

This is why you defer the Dutch. 1.d4 e6! If 2.Nc3, 2.e4, or something really absurd like 2.h3, then 2...d5. If 2.c4 or 2.Nf3 or 2.g3, only then 2...f5!

I agree with ThrillerFan, avoid the weird White moves, his gambits at first by answering 1. d4 with 1. .. e6

I always play 1.d4 e6 but then if 2.e4 I play 2.c5 , if 2.Nf3 I play either 2.Nf6 or 2.c5 , if 2.Nc3 I play 2.c5 , if 2.g3 I played 2.c6 and am considering playing 2.c5 ........... mostly my 2nd move is c5 in 1.d4 e6 positions . Avoids the Advanced French

1.d4 e6 2.e4 c5 is dubious. 3.d5! and you have the Franco-Benoni, which is better for White. Any Benoni line where White hasn't committed to c4 is dubious at best for Black. For example, 1.d4 c5 2.d5 Nf6 (or 2...d6, the Schmid Benoni, will usually transpose) 3.Nc3! g6 4.e4 Bg7 5.Be2 d6 6.Nf3 intending O-O, Nd2, and Nc4 - this is why Black waits for c4, so a Knight cannot go there and attack the weak d6-pawn..

And what is to fear about the Advance French? When I defer the Dutch with 1...e6, I will answer 2.e4 or 2.Nc3 with 2...d5! Otherwise, most other responses it's 1...f5. Nimzo-Indian players that play the French can do the same thing. 1.d4 e6 and answer 2.c4 or 2.Nf3 or whatever with 2...Nf6 and 2.e4 or 2.Nc3 with 2...d5.

If you are unwilling to play the French Defense, then 1.d4 e6 is ineffective.

Two Knights , Normal and any other such side lines of French are ok . Just the Advanced has that annoying Milner-Barry Trap which in order to avoid the Advanced French must be avoided . n

I have to admit, I don't care for avoiding the traps in the Dutch. I am much happier learning how to play well in all dutch lines than try to defer the decision. I like the flexability of playing Leningrad, classical, or stonewall if I am not facing a gambit line. No interest in converting it to a Sicilian or French or Benoni, would prefer to play in a gambit line to all of them. Guess this is just me.

2 g3 is stronger than 2 h3.

The point of this was to showcase a trap that even works at expert level

Although being down played, I will throw this at some peeps irl for sure