snakes and ladders

/S N EY1 K S AH0 N D L AE0 D ER0 Z/
noun
  1. 1

    A children's luck-based board game of Indian origin, played on a numbered grid, the aim of which is to proceed to the end, and in which ladders aid progress and snakes impede it.

  2. 2

    Any situation in which people or events go forward and backward, seemingly at random

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Source: https://en.wiktionary.org/wiki/snakes%20and%20ladders