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Low Level Design Sep 06, 2026 12 min read

Low Level Design: Snake & Ladder Game with Modular Game Loops & Strategy Pattern

A masterclass in clean machine coding. Architecting Snake & Ladder with modular game loops, swappable dice strategies, and customizable board jump entities.

LLDGame DesignStrategy PatternOOPMachine Coding
HFHLDForge Architecture TeamLead Machine Coding Specialist

1. Requirements & Extensibility

The game supports $N$ players, an $M \times M$ board (default 100 cells), arbitrary snakes and ladders, and configurable dice counts. The game must allow pluggable dice behaviors (crooked dice, multiple 6-sided dice) and detect when a player reaches exactly cell 100.

2. Domain Entities: Board, Player, Cell & Jump

A `Jump` object encapsulates snakes (`start > end`) and ladders (`start < end`). Each `Cell` on the `Board` holds an optional `Jump`. When a player lands on a cell with a jump, their position is updated automatically.

3. Game Loop Orchestration

A FIFO `Queue<Player>` manages turns. The active player rolls the dice, moves their piece, checks for jumps, and if they haven't won, is placed back at the tail of the queue.

typescript
class Jump {
  constructor(public start: number, public end: number) {}
}

class SnakeAndLadderGame {
  private jumps = new Map<number, number>();
  private players: { id: string; position: number }[] = [];

  constructor(snakes: Jump[], ladders: Jump[]) {
    snakes.forEach(s => this.jumps.set(s.start, s.end));
    ladders.forEach(l => this.jumps.set(l.start, l.end));
  }

  public movePlayer(playerIndex: number, roll: number): boolean {
    let pos = this.players[playerIndex].position + roll;
    if (pos > 100) return false;
    if (this.jumps.has(pos)) pos = this.jumps.get(pos)!;
    this.players[playerIndex].position = pos;
    return pos === 100;
  }
}
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Written by HLDForge Architecture Team

Lead Machine Coding Specialist

The HLDForge Architecture Team publishes practical engineering guides, real-world case studies, and high-concurrency blueprints to help engineers build scalable and fault-tolerant software.

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