Wordle Strategy Guide — Candidate Compression, Positional Entropy & Elimination Logic
Wordle is a constrained search problem. Six guesses to identify one word from a pool that begins at 12,478 and must reach one. Every tile return — green, yellow, or grey — is information that compresses the remaining candidate space. Strategy is the discipline of maximising that compression per guess.
This guide establishes the analytical framework used across the site's Wordle strategy articles: the concepts, terminology, and decision logic that inform opener selection, mid-game routing, and Hard Mode adaptations.
The Core Concepts
Four concepts recur throughout Wordle strategy analysis on this site. Understanding them as a system is more useful than understanding any one in isolation.
Each guess reduces the remaining candidate pool. Compression rate measures how aggressively a guess narrows the field — regardless of whether tiles come back green, yellow, or grey. High-compression guesses are valuable even when they return grey tiles, because grey tiles eliminate large candidate groups.
Different letter-position combinations carry different information value. E in position 5 eliminates more candidates than E in position 3 because E disproportionately concentrates at word endings. Efficient solving targets high-entropy positions — those where a single tile confirmation or elimination compresses the pool most aggressively.
In Hard Mode, confirmed letters must appear in every subsequent guess. Coverage debt is the positioning obligation created by yellow tiles — letters confirmed present but unplaced. Green tiles generate no debt (position satisfied). Yellow tiles generate flexible debt that must be resolved across remaining guesses.
Grey tiles on high-frequency letters eliminate more candidates than grey tiles on low-frequency letters. Grey E eliminates roughly 44% of the full dataset. Grey Q eliminates fewer than 1%. Testing high-frequency letters first maximises what grey tiles remove — making the guess efficient regardless of whether the letter appears.
The Solve Sequence — Five Decision Stages
What the Dataset Reveals About Wordle
The verified 12,478-word set gives quantified grounding to strategic decisions that are often described only qualitatively. A few key numbers inform every stage of the solve:
The pool starts at 12,478. A single green tile in position 1 on S cuts it to 1,521 immediately — an 87.8% reduction. A grey E in position 5 eliminates 1,477 candidates. These are not estimates. They are structural properties of the lexical distribution.
64.2% of the pool carries no repeated letters. The 8,013-word no-repeat subset is the correct prior for opener selection — most answers follow the dominant two-vowel, no-repeat structure. Departing from this prior requires tile evidence.
Position 3 is the highest vowel-density slot. Openers placing vowels in positions 2–4 test the highest-frequency vowel slots. This is why RAISE (R-A-I-S-E) and CRANE (C-R-A-N-E) apply efficient positional pressure — their vowels land where vowel concentration is highest.
Hard Mode — Coverage Debt Framework
Hard Mode requires every confirmed letter to appear in every subsequent guess. This changes the strategic calculus significantly — not because solving becomes harder per se, but because yellow tiles generate positioning obligations that constrain future guesses.
Green tiles cost nothing in Hard Mode: the position is already correct and the letter is already placed. Every subsequent guess satisfies the constraint automatically.
Yellow tiles generate flexible debt. A yellow S means S must appear in a new position every guess until it turns green. If S appears in positions 1, 2, 3, 4, and 5 with roughly equal frequency, the debt resolution is genuinely flexible. Some letters have more natural resolution paths than others.
The safest Hard Mode approach: prioritise green confirmations over yellow accumulation. Multiple unresolved yellow tiles create compounding debt that limits the candidate pool to words satisfying all simultaneous placement constraints — which can trap you in rhyme families (LIGHT, MIGHT, NIGHT, SIGHT) where no single guess differentiates the remaining candidates. Full coverage debt analysis in the Hard Mode strategy guide.