Mine-Eluder-App

A simple game app using TextViews, EditTexts, Buttons and Intents. This app is an upgradation to the command-line game "Mine-Eluder" which I developed using C++.

Intro about the Game

Mine Eluder is a 2-D grid based game with some cells having obstacles. Initially all the cells are covered. The goal of the game is to uncover all the possible cells that do not have obstacles. The player can step into any location inside the grid and uncover it. The obstacles are called as mines, where the player should not step into, if he steps into the mine and uncovers it, then the game ends there. There are three difficulty levels in this game, Newbie, Specialist and Master. The dimension of grid and probability of mines is determined according to the difficulty level.

Rules of the Game

1. The rule of the game is to uncover all the cells that do not have mines in it.

2. To uncover any cell you may enter the cell location. If the cell you entered has mine it in, then you lose the game, else the game continues.

3. You can choose the difficulty of the game. There are three difficulty options available. They are

   • NEWBIE
   • SPECIALIST
   • MASTER

Configuration of the Grid

1. Dimension of the Grid

NEWBIE	5*5	(Total 25 cells)
SPECIALIST	7*7	(Total 49 cells)
MASTER	9*9	(Total 81 cells)

2. Probability of Mines

NEWBIE	0.20	(Total 5 mines in 25 cells)
SPECIALIST	0.30	(Total 15 mines in 49 cells)
MASTER	0.40	(Total 33 mines in 81 cells)

Scoring

Your score is calculated as: (c * 100) / (d - ceil(d * p))

• Here,
  • c - cells unlocked which doesn't have mines
  • d - total cells
  • p - probability of mines

Approach Used

The grid is implemented as a Sparse Matrix where mines are the non-zero elements and other cells are the zero elements. This Sparse Matrix is represented in memory using 2-D ArrayList based on coordinate list method where row and column of mines location is stored. This thereby saves ^((1 - 2 * p) * 100)% of memory. The locations of non-zero elements in the Sparse Matrix is filled using the random function present in the Kotlin Random Class.

^ (p - probability of mines) -> the result is approximate value

Screenshots of the App

Note: I developed this game using C++ which is a command-line application and this app is an upgradation to it with a good UI. You can find the C++ code here 👉 Click Here