Switch Grid
Every switch flips its neighbours too - turn all the lights off. On the 3x3 board, the keypad is the grid.
Puzzle Emulator verified v1.0.0 16.8 KB
The JAR and JAD are the Original Java ME Version for phones and emulators. How to install.
About
A light-switching logic puzzle in three flavours. Keypad 3x3 maps keys 1-9 straight onto the switches, Classic 5x5 uses a cursor, and Wrap 5x5 lets neighbours wrap around the edges. Each puzzle is built by pressing random switches, so it is always solvable; finish within par for a bonus. Twenty increasingly scrambled levels.
Objective: Turn every light off, ideally within the par number of presses.
Modes: Keypad 3x3, Classic 5x5, Wrap 5x5
logic lights keypad puzzle
Screenshots captured from the real JAR at 176x208 on the project's reference runtime; the third image is rendered by MicroEmulator 2.0.4.
Controls
| Key | Action |
|---|---|
| 1-9 | Press that switch (3x3) |
| 2/4/6/8 | Move cursor (5x5) |
| 5 | Press switch (5x5) |
| * | Pause menu |
In every game: 5 selects in menus, * pauses, and on the title screen # opens help and 0 toggles sound. The joystick and 2/4/6/8 are interchangeable.
Verification
| Level | Status | Details |
|---|---|---|
| Build verified | Yes | Compiled against CLDC 1.0 / MIDP 2.0; JAR + JAD generated |
| Reference runtime | Yes | Passed at 128x128, 128x160, 176x208, 176x220, 240x320 |
| Emulator verified | Yes | Automated smoke test on MicroEmulator 2.0.4 (176x220) |
| Real device verified | No | Not yet tested on real hardware |
Tried it on a real phone? Send a device report.
Technical details
| MIDlet | switchgrid.SwitchGridMIDlet |
|---|---|
| Platform | Java ME, CLDC 1.0, MIDP 2.0 |
| JAR size | 16.8 KB |
| Screens | 128x128, 128x160, 176x208, 176x220, 240x320 |
| Storage | RMS record store gk (settings, best score) |