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

Kadas Opening
a b c d e f g h 8 8 7 7 6 6 5 5 4 4 3 3 2 2 1 1 a b c d e f g h
Position in Forsyth-Edwards Notation (FEN) rnbqkbnr/ppp1pppp/8/3p4/7P/8/PPPPPPP1/RNBQKBNR w
Moves: 1. h4 d5
ECO code: A00

Kadas Opening

1...d5

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

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	- -	- -	=