On ProPuz, Futoshiki difficulty is not mainly a mysterious “star rating” on a fixed grid. Easy uses 4×4, Medium 5×5, Hard 6×6, and Expert 7×7, with inequality density generally rising as tiers climb. Understanding what actually changes helps you pick fair practice instead of leaping into panic. Rules recap: basic rules explained.
Change 1: the digit alphabet grows
Each jump in n adds another symbol to track in every row and column. Candidate lists lengthen; leftover logic still works but takes more bookkeeping. A player fluent at 4×4 can feel “suddenly bad” at 6×6 while making zero new conceptual errors—only capacity errors.
Mitigation: pencil marks and row tallies become non-optional sooner—see pencil marks.
Change 2: more edges can carry signs
Larger grids have more adjacent pairs. Higher tiers tend to keep a greater fraction of those edges as inequalities. You get more constraints (helpful) and more glyphs to read without flipping (risky). Vertical density especially rises in perceived difficulty because many solvers under-train vertical reading.
Mitigation: alternate horizontal and vertical passes every loop. Chain reading pays more rent—see inequality chains.
Change 3: givens and “open space” feel different
Easy boards often leave short paths from givens to finishes. Harder boards may feel emptier at first glance even with more signs, because the fraction of filled cells drops relative to total cells. You must create information with extremes and singles instead of waiting for a crowded given pattern like classic Sudoku Easy.
If you expect Sudoku-like given density, reread Futoshiki vs Sudoku.
Change 4: error cost rises
A wrong early digit on 4×4 is usually obvious soon. On 7×7, a wrong digit can poison a large region before Check. That is why no-guessing discipline matters more as tiers rise—not because Easy allows cheating, but because recovery is cheaper there.
Adopt the stuck protocol from solve without guessing before you invent digits on Hard.
Change 5: session length and stamina
Easy can be a coffee-break puzzle. Expert is a project. Plan breaks, protect mark hygiene, and avoid mixing Expert practice with sleep deprivation. Advanced stamina tips live in advanced methods.
Daily challenges offer all four tiers for a date—pick the tier that matches today’s bandwidth, not yesterday’s pride.
What does not change
The rules sentence is identical: digits 1..n once per row and column; strict inequalities on printed edges; givens fixed; ProPuz Check against the stored solution. Techniques for extremes, forced neighbors, and singles still apply. You do not unlock a second game—you unlock more of the same game.
Mnemonics for reading glyphs should stay fixed across tiers. Switching mnemonics under Expert stress is a self-inflicted wound.
A fair promotion ladder
Promote when you can finish several boards at the current tier with first-try Check success and spoken reasons for early fills. Demote temporarily when you notice glyph flips or mark rot. Promotion is a skill gate, not a calendar date.
Sample ladder: five clean Easy → Medium until marks feel natural → Hard with subunit focus → occasional Expert. Use Generate on the play sidebar to stay inside a tier while varying layouts.
Comparing “hard” across sites
Other sites may keep 5×5 fixed and vary only clue count. ProPuz’s size-based tiers are explicit in the UI chips. When reading external advice, translate their “hard” into either denser clues or larger n before applying drills blindly.
Within ProPuz, trust the chip: if it says Expert, expect 7×7 bookkeeping even on a “friendly-looking” first row.
Speed expectations by tier
Do not compare Easy times to Hard times. Separate records. Calm speed strategies in solve faster still apply, but the payoff curve differs. Chasing a universal personal best across tiers encourages unsafe guesses on large grids.
Grade Hard sessions by cleanliness first, duration second.
Self-check before you promote
Can you complete three consecutive boards at the current tier with first-try Check success? Can you name the technique behind your first three fills on each? Do your marks stay honest through the endgame? If any answer is no, stay put. Promotion without those checks is how players collect unfinished Expert tabs and a story that “Futoshiki gets unfair.”
Also check emotional signals: glyph confusion, urge to randomize, and skipping vertical passes are demotion flags even if you occasionally luck into a finish. Luck is not readiness. Spend two Easy boards resetting habits, then resume the ladder.
Parents and teachers can use the same gates for students: size increases only after clean reasons, not after a single timed win. That keeps Futoshiki a logic activity instead of a frustration contest.
Quick tier cheat sheet
Easy 4×4 — learn signs and extremes; marks optional but useful. Medium 5×5 — marks recommended; chains start to matter daily. Hard 6×6 — marks plus subunit focus; probes carefully. Expert 7×7 — full clerical systems and stamina planning. Carry the same rules sentence up the sheet; only the workload changes. When in doubt, play one tier below your ambition and finish clean—progress compounds from finished boards, not from abandoned Experts.
Choose today’s board wisely
Open the Futoshiki hub, pick a tier on purpose, or use daily challenges for a shared date. Warm up with 4×4 step-by-step thinking even when you play larger—the opener transfers. More reading: articles index.