Four-Player Chess/Common openings/1. h3/1...d6/1...h12

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1...h12 - Modern Sicilian
a b c d e f g h i j k l m n
14{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} yellow rook{{{square}}} yellow knight{{{square}}} yellow bishop{{{square}}} yellow king{{{square}}} yellow queen{{{square}}} yellow bishop{{{square}}} yellow knight{{{square}}} yellow rook{{{square}}} red king{{{square}}} red king{{{square}}} red king14
13{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} yellow pawn{{{square}}} yellow pawn{{{square}}} yellow pawn{{{square}}} yellow pawn{{{square}}} red king{{{square}}} yellow pawn{{{square}}} yellow pawn{{{square}}} yellow pawn{{{square}}} red king{{{square}}} red king{{{square}}} red king13
12{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} yellow pawn{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king12
11{{{square}}} blue rook{{{square}}} blue pawn{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} green pawn{{{square}}} green rook11
10{{{square}}} blue knight{{{square}}} blue pawn{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} green pawn{{{square}}} green knight10
9{{{square}}} blue bishop{{{square}}} blue pawn{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} green pawn{{{square}}} green bishop9
8{{{square}}} blue king{{{square}}} blue pawn{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} green pawn{{{square}}} green queen8
7{{{square}}} blue queen{{{square}}} blue pawn{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} green pawn{{{square}}} green king7
6{{{square}}} blue bishop{{{square}}} red king{{{square}}} red king{{{square}}} blue pawn{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} green pawn{{{square}}} green bishop6
5{{{square}}} blue knight{{{square}}} blue pawn{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} green pawn{{{square}}} green knight5
4{{{square}}} blue rook{{{square}}} blue pawn{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} green pawn{{{square}}} green rook4
3{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red pawn{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red king3
2{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red pawn{{{square}}} red pawn{{{square}}} red pawn{{{square}}} red pawn{{{square}}} red king{{{square}}} red pawn{{{square}}} red pawn{{{square}}} red pawn{{{square}}} red king{{{square}}} red king{{{square}}} red king2
1{{{square}}} red king{{{square}}} red king{{{square}}} red king{{{square}}} red rook{{{square}}} red knight{{{square}}} red bishop{{{square}}} red queen{{{square}}} red king{{{square}}} red bishop{{{square}}} red knight{{{square}}} red rook{{{square}}} red king{{{square}}} red king{{{square}}} red king1
a b c d e f g h i j k l m n
Position in FEN4

G-0,0,0,0-1,1,1,1-1,1,1,1-0,0,0,0-3-
3,yR,yN,yB,yK,yQ,yB,yN,yR,3/
3,yP,yP,yP,yP,1,yP,yP,yP,3/
7,yP,6/
bR,bP,10,gP,gR/
bN,bP,10,gP,gN/
bB,bP,10,gP,gB/
bK,bP,10,gP,gQ/
bQ,bP,10,gP,gK/
bB,2,bP,8,gP,gB/
bN,bP,10,gP,gN/
bR,bP,10,gP,gR/
7,rP,6/
3,rP,rP,rP,rP,1,rP,rP,rP,3/
3,rR,rN,rB,rQ,rK,rB,rN,rR,3

Common moves:
1...l9 - Kann Variation
1...k8 - Icystun-Kujtimi Defence
1...Nl9 - Valger's Defence


Modern Sicilian, 1...h12[edit]

Yellow develops on the opposite colour squares compared to Red and normally follows up with one of two main ideas. The first idea is Bg12, attacking Green's weak m6 square, which can potentially be very dangerous, although Blue and Green have the resources to defend adequately. The second idea is Qh13, developing the queen on the light-squared diagonal, possibly aiming to create mating threats against Blue, if Red's queen can attack b7 or b9 later on.

Green's responses[edit]

Green has several options. The most common reply is l9, the Kann Variation.

Kann Variation, 1...l9[edit]

The classical choice, intending to blunt a bishop move to g12 with pawn to k8.

Icystun-Kujtimi Defence, 1...k8[edit]

This opening move seemingly allows an annoying check, but in fact, it is very hard for Red and Yellow to take advantage. This specific move order has caught on lately, probably because of it's flexibility. Green and Blue can choose their set-up depending on what red and yellow will play. Specifically keeping the b8 pawn for Blue on the original square can be useful later, allowing Blue to play Nc6 and c7 or d7, countering the usual idea of Yellow to play Qh13. Another way to deal with Qh13 is for Blue to play c8 and for Green to answer the check with Bm8. This may look like a mistake at first sight, but in fact it is playable. If Red tries to set up a checkmate on Green by playing Qxm7+, Blue answers by playing Qxg13+, which is simply a queen trade.

Valger's infected defence
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1. h3 d6 h12 Nl9 2. e3 c8 Qh13 l7? Now this leads to complications. 3. Qxn8 Qc9 Qi12! Nxn8 4. Bxb5 The point of Qi12.

Valger's Defence, 1...Nl9[edit]

The idea is to prepare l7 by defending the queen on n8. The approved way to counter this choice is for Red to play e3 and after Blue plays c8, Yellow plays Qh13. If Green now tries to play l7, it will backfire. The reason is that Red captures on n8. Since Yellow can capture the knight on l9, Blue has to play Qc9 to protect the knight, but then comes Qi12!. After Nxn8 the point is revealed with Bxb5, which wins quite easily. This way of playing was in fact introduced by valger himself, when some clever players tried to play Valger's defence against its creator! Of course, Green could refrain from playing l7, but then it can be quite difficult to activate the queen. Skilled manoeuvres will be required just to stay in the game.