30×30 Picross Online — 900 Cells, Six Difficulty Levels

Thirty rows, thirty columns, 900 cells. This is the maximum. The 30×30 is the largest Picross format on the platform — a 60-line constraint network, pixel art at the highest resolution the format can produce, and an Evil difficulty configuration that represents the hardest Picross puzzle available anywhere. Choose your difficulty knowing exactly what you're committing to.

Choose Your 30×30 Difficulty

→ 30×30 Easy — high-overlap clues, maximum-resolution pixel art, 80–130 minute sessions

→ 30×30 Medium — 60-line cross-referencing, 150–240 minute sessions

→ 30×30 Hard — arrangement enumeration across 900 cells, 240–400 minute sessions

→ 30×30 Expert — hypothesis technique across a 60-line network, 8–13 hour multi-session project

→ 30×30 Extreme — extended multi-cycle hypothesis solving, 15–25 hour multi-week project

→ 30×30 Evil — the hardest Picross configuration on the platform, 25–60 hour multi-week project

What 30×30 Represents

The end of the progression. The 30×30 is the final destination of the platform's size ladder. Every technique, every habit, and every documentation discipline developed across the smaller grid sizes reaches its maximum expression here. Easy and Medium remain accessible to any solid solver willing to commit the time. Hard and above are dedicated multi-session projects. Evil 30×30 is what the entire progression has been building toward — the hardest Picross puzzle this platform, and the Picross format itself, can generate.

Nine hundred cells of maximum-resolution pixel art. At 900 cells, Picross images achieve a visual complexity and detail that no smaller grid can approach. The pixel art at 30×30 reads less like a game graphic and more like an illustration — intricate compositions with expressive detail, texture, and visual depth that make the reveal one of the most memorable experiences the format offers at any size.

The exact half-line threshold. In a 30-cell line, any single-block clue of "15" or smaller produces zero direct overlap. "15" is exactly half of 30 — making 30×30 the only grid size on the platform where the zero-overlap boundary falls precisely at the midpoint of possible single-block sizes. Below "16", every single-block clue in a 30-cell line depends entirely on cross-referencing. This makes 30×30 the most cross-referencing-intensive grid per line of all the available sizes.

30×30 Overlap Analysis — Key Numbers

With a 30-cell line, the overlap landscape is defined by the midpoint at "15":

Clue "29" → slack 1 — cells 2–29 always filled. Twenty-eight confirmed cells.

Clue "25" → slack 5 — cells 6–25 always filled. Twenty confirmed cells.

Clue "20" → slack 10 — cells 11–20 always filled. Ten confirmed cells.

Clue "17" → slack 13 — cells 14–17 always filled. Four confirmed cells.

Clue "16" → slack 14 — cells 15–16 always filled. Two confirmed cells.

Clue "15" → slack 15 — zero overlap. The exact midpoint: half the possible single-block range produces nothing.

Clue "16 13" → minimum span 30, slack 0. Forced: cells 1–16 filled, cell 17 empty, cells 18–30 filled.

Clue "15 14" → minimum span 30, slack 0. Forced: cells 1–15 filled, cell 16 empty, cells 17–30 filled.

Clue "10 10 8" → minimum span 30, slack 0. Forced: cells 1–10, gap, cells 12–21, gap, cells 23–30.

Clue "10 8 10" → minimum span 30, slack 0. Forced: cells 1–10, gap, cells 12–19, gap, cells 21–30.

Clue "9 10 9" → minimum span 30, slack 0. Forced: cells 1–9, gap, cells 11–20, gap, cells 22–30.

Where 30×30 Sits in the Full Progression

30×30 is the ceiling. There is no larger grid on the platform. Players arriving at 30×30 have typically worked through the full difficulty spectrum at 25×25 — or at minimum through 20×20 — and have developed the systematic 60-line management habits, documentation infrastructure, and session discipline that this grid demands. Easy and Medium are achievable without that preparation for experienced solvers; Hard and above require it.

Stuck on a specific puzzle? The 30×30 Solver identifies your next step from the current clue state.