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Chess Opening Theory/1. h4/1...d5

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Kadas Opening
a b c d e f g h
8a8 black rookb8 black knightc8 black bishopd8 black queene8 black kingf8 black bishopg8 black knighth8 black rook8
7a7 black pawnb7 black pawnc7 black pawnd7 black kinge7 black pawnf7 black pawng7 black pawnh7 black pawn7
6a6 black kingb6 black kingc6 black kingd6 black kinge6 black kingf6 black kingg6 black kingh6 black king6
5a5 black kingb5 black kingc5 black kingd5 black pawne5 black kingf5 black kingg5 black kingh5 black king5
4a4 black kingb4 black kingc4 black kingd4 black kinge4 black kingf4 black kingg4 black kingh4 white pawn4
3a3 black kingb3 black kingc3 black kingd3 black kinge3 black kingf3 black kingg3 black kingh3 black king3
2a2 white pawnb2 white pawnc2 white pawnd2 white pawne2 white pawnf2 white pawng2 white pawnh2 black king2
1a1 white rookb1 white knightc1 white bishopd1 white queene1 white kingf1 white bishopg1 white knighth1 white rook1
a b c d e f g h
Position in Forsyth-Edwards Notation (FEN)
Moves: 1. h4 d5
ECO code: A00

Kadas Opening

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1...d5

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Black takes the center and opens the diagonal for the light-squared bishop, preventing White's kingside rook from coming out with 2. Rh3??, to which Black will respond with Bxh3. White may try to rectify this with 3. h5?!, but this allows Black to take the full center with 3... e5! not allowing the rook to come to h4 either.

Responses

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White may respond to the move d5 with:

  • 2. h5, allowing Black to take the full center with 2...e5,
  • 2. d4, which is more principled, and White will always play d4 in this opening so why not?
  • or 2. Nf3, controlling the center with a knight and either going into a King's Indian-like defense, playing classically, or just transposing into the d4 line.
1. h4 d5
2 3 4 5 6
Croon's Gambit Accepted:

Risky Variation

h5?!

e5

h6?!
gxh6?!
d4
e4?!
Bf4
Nc6
e3
Bf5?!
±
Croon's Gambit Accepted:

Knight's Acception

...
...
...
Nxh6
d4
e4?!
Bxh6

gxh6

e3

Nc6?!

±
Croon's Gambit Accepted:

Knight's Acception

...
...
...
...
...
...
...
...
...

Bg7

=
Croon's Gambit Declined:

Thorn Defense

...

...

...

g6

e5

d4

e4

Bf4?!

Bd6

Bxd6

=
Kadas Opening:

King's Indian Variation

Nf3

Nc6

d4

Nf6

g3

Bg4

Bg2

e6

O-O

Bd6

=
Kadas Opening:

Center Variation

d4

Nc6?!

h5?!

h6

Nf3

Nf6

Nc3

Bg4

Bf4

e6

=
Transposition to

Center Variation

Nf3

Nc6

d4

Nf6

h5?!

h6

-

-

-

-

=