'Battle of the Kings' is a chess variant that drives you crazy

Friends! I am glad to present you my next invention. The history of the chess world, chess variants has never seen anything like this.
I will not surprise you with new fairy pieces or board size. No! My idea is much more extreme. It overturns all ideas about chess and chess variants.

Just as the periodic table once appeared to Mendeleev in a dream, the idea of this chess variant dawned on me on one of the sweltering Moscow nights in the summer of 2021.

Frankly, when I tried to play a game with myself in the Battle of the Kings, I completely lost touch with the reality of what was happening on the board and, like Robert Oppenheimer, was horrified by what I had done. As a consequence, I had to put aside this chess variant for a while, publishing only a modest description of 'Battle of the Kings' on chessvariants.com (https://www.chessvariants.com/rules/battle-of-kings-) 

I must say that 'Battle of the Kings' was the predecessor of E-Chess - a chess variant that I tested here on the forums of this site. E-Chess turned out to be a good but too unbalanced chess variant. It is for this reason that I decided to return to the origins, to the game from which E-Chess came out, to the game that scared me so much with its complexity and almost drove me crazy.

So welcome to the 'Battle of the Kings'! The game after which you will look at chess in a new way.

The game uses a standard 8x8 chessboard. 

Setup. Standard chess setup, except that there are no chess pieces on the first and last rank. The rest of the pieces appear on the board during the game.

The movement of pieces and their 'reproduction'. Chess pieces move across the board as they do in ordinary chess - according to the standard rules of move and capture. After a piece leaves the square on which it stood, a new chess piece appears on this square, according to the following chain of cycles: Pawn - Knight - Bishop - Rook - Queen - King.
Thus, after the pawn's move, a knight appears on the square where this pawn stood. On the square where the knight stood, after its movement, the bishop appears, and so on until the king appears. So one piece generates (or spawns, idk which word is better) another, and only the king does not generate any pieces during its movement. With each move, the fields of the board fill up, turning a chess battle into an unprecedented opposition of chess pieces.

End of the game. The game ends with a victory for one of the parties. There is no draw.
During the game, two or more kings of the same color may appear on the board. The player wins the game in the following cases:

- the opponent surrenders

- checkmated at least one of the opponent's kings

- check to two or more kings is considered checkmate if at least one of the kings cannot avoid this check

- the opponent cannot take advantage of this move during his move, since all his pieces are deprived of the opportunity to make a move according to the rules (stalemate)

- the opponent made a move leading to a repetition of the position (which is only possible if there are kings on the board)

- a game played under time control will end as a loss for a player who uses up all of the time allotted on the player's clock, which is called flag-fall

Special moves.
In chess, special moves include en passant and castling. In the 'Battle of the Kings' castling is absent, and en passant is used as in ordinary chess.
The 50-move rule in the 'Battle of the Kings' is meaningless as the entire board will eventually be filled with pieces.

Pawn promotion. If a player advances a pawn to its eighth rank, the pawn is then promoted (converted) to a king, queen, rook, bishop or knight of the same color at the choice of the player. It is clear that promoting to a king is tantamount to suicide, but according to the logic of the game, there should be such an option, although no one will use it.

Here is an example of the first moves of the game:

1. e3 e6 

2. Ng3 d6

The advantage of the first move in the 'Battle of the Kings' does not matter at all, since by making the first move you trigger a self-destruction mechanism - sooner or later all your pieces will evolve, filling the surrounding space, and a collapse will occur. If you let your opponent do it first, then you have won. The paradox of the game is that, on the one hand, you have to fight for living space, constantly increasing your strength and power, and on the other hand, do not become a victim of your own strength and power.

It is not possible to calculate anything in this game. We can be guided by intuition and instincts, which tell us that the appearance of kings should be postponed as late as possible, and hence the appearance of queens and rooks is not desirable. However, for each move a new piece appears on the board, and the appearance of new pieces, and more senior in the rank, cannot be avoided. Nevertheless, in all this chaos there is strict harmony and consistency, although what is happening on the board is difficult to explain.

So, are you ready to step over this reality and find yourself in a hitherto unknown world of paradoxes?