Yajilin: Line Logic is a singleplayer logic puzzle game in the strategy, indie, and casual genres available on PC. Players shade cells and draw loops according to arrow clues on a grid, following strict rules that guarantee a unique solution reachable through deduction alone.
Gameplay
The core loop requires shading some cells black while ensuring no two share a side, though corner touches remain allowed. A single continuous loop must then pass through the centers of every remaining white cell without crossings, branches, or early closures. Gray cells contain the clues and stay outside the loop entirely.
Each clue consists of a number paired with an arrow. The number indicates exactly how many black cells lie in that arrow's direction, extending all the way to the board edge. Shaded cells never touch the clues themselves, and the loop routes around them. Every puzzle presents exactly one valid configuration, and logical steps always suffice to progress without any need for trial and error.
Rule violations appear immediately during play. Examples include adjacent black cells, unmet clue counts, or loops that close prematurely. Optional visual aids highlight leftover sides in cells where lines meet and fade completed clues once satisfied. Separate line segments receive distinct colors to clarify which sections still require connection.
Game Modes
Daily puzzles appear each day with the same challenge for all players. Difficulty increases progressively across the week, starting easier and reaching expert levels by the weekend. A built-in calendar tracks missed days and allows catch-up play at any time.
Endless mode supplies thousands of additional puzzles across four board sizes: 6x6, 8x8, 10x10, and 12x12. Four difficulty tiers labeled Easy through Expert organize these puzzles according to the specific techniques required rather than grid dimensions alone. Progress saves automatically, and best times plus overall statistics remain available for review.
Solving Assistance
A comprehensive tutorial covers the rules and every technique from basic to advanced levels. Hints reveal the next logical step incrementally without spoiling the full solution. A mistake checker flags inconsistencies as they occur.
These tools support players who prefer guided practice or occasional nudges while preserving the pure logic focus. The system never requires guessing, aligning with the design that every puzzle yields to methodical reasoning.
Controls and Customization
Mouse and keyboard inputs both work for shading cells and drawing lines. Full undo and redo functions operate even after clearing the entire board. A timer can be hidden, and a pause screen conceals the grid during breaks.
Visual options include light and dark modes, three color themes, bolder line thickness, and soft audio feedback. These settings let players tailor the experience for comfort during extended sessions.
Is It Worth Playing?
Yajilin: Line Logic suits anyone who enjoys deduction-based puzzles such as Sudoku. The emphasis on logic without luck or randomization delivers consistent satisfaction across short daily sessions or longer endless runs.
Verified features like progressive daily challenges, extensive endless content, and layered assistance tools provide clear value for dedicated puzzle solvers. The game maintains a focused, uncluttered presentation that rewards careful observation and incremental progress.
- Ideal for players seeking portable-length logic challenges on PC
- Strong fit for those who appreciate rule-driven grid puzzles with guaranteed solvability
- Less suitable for anyone preferring action, chance elements, or multiplayer competition
