ExcelChess

This time with traditional pieces, with a simple modification of the rules that greatly accelerates the middle and especially the final stages of the game.

The basic rules are the same as in traditional chess.
The transformation of a pawn that has reached the last rank of the board and the taking by passage (e.p.) are abolished.

The last two rows of the board (7th and 8th for White, 1st and 2nd for Black) are the zone of transformation.
After entering this zone, all stones change to checkers. After leaving the zone of transformation, the value of the piece does not change.