2 | A normal move is always followed by an opponent's pawn push.
5 Each turn consists of two parts. The first part is a move
6 legal with the orthodox chess rules. The second part of the move,
7 called "push", consists of moving an opponent's pawn a single space forward
8 (toward the player in turn).
9 White has no pawn push on the first move ("balanced" Avalanche).
12 If no pawn can advance at the second part, then it's
13 opponent's turn. If a pushed pawn reaches its last rank,
14 the opponent decides next in which piece it promotes.
16 figure.diagram-container
18 | fen:rnbqkbnr/1pppp1pp/8/p7/P3Pp2/8/1PPPKPPP/RNBQ1BNR:
20 | fen:rnbqkbnr/1pppp1pp/8/p7/P3P3/2N2p2/1PPPKPPP/R1BQ1BNR:
22 White plays Nc3,f3 (bad idea). Then Black can capture the king.
24 p In some cases, kings can be captured. This counts as a win.
26 p There are no en-passant captures.
32 a(href="https://www.chessvariants.com/mvopponent.dir/avalanche.html")
34 | on chessvariants.com.