Open debuts

	a	b	c	d	e	f	g	h
eight									eight
7									7
6									6
five									five
four									four
3									3
2									2
one									one
	a	b	c	d	e	f	g	h

Open debut

Open debuts - characterized by the initial move of white 1. e2-e4 and the answer of black 1. ... e7-e5 . White can immediately strive to capture the center by 2. f2-f4 ( royal gambit ) or 2. d2-d4 (central opening) with an active figure game, or adhere to a plan for quiet development - 2. Ng1-f3 d7-d6 ( Philidor's defense ) ; 2. Кb1-c3 Кg8-f6 3. Кg1-f3 Кb8-c6 ( debut of four horses ); 2. Kg1-f3 Kg8-f6 ( Russian party ); 2. Кg1-f3 Кb8-c6 3.Сf1-c4 Сf8-c5 ( Italian party ), etc.

Promotion of d7-d5, for example, 2. Кg1-f3 Кb8-c6 3. Сf1-c4 Кg8-f6 4. Кf3-g5 d7-d5 (protection of two knights) also plays a special role in black’s active defense systems; 2. d2-d4 e5: d4 3. c2-c3 d7-d5 ( central gambit ); 2. Кg1-f3 Кb8-c6 3. c2-c3 d7-d5 ( Ponziani's debut ); 2. Bf1-c4 Kg8-f6 3. d2-d3 c7-c6 followed by d7-d5 ( elephant debut ), etc. ^[1]