Practical Puzzle vs Composition
Practical puzzle
- usually extracted or game-like;
- asks for chess best play;
- primarily instructional.
Composition
- deliberately authored;
- explicit stipulation;
- technical soundness;
- formal/thematic/artistic content.
A practical mate in 2 exercise is not automatically a compositional #2.
Problem vs Study
In specialist usage:
study
- White to win/draw;
- no stated move maximum.
problem
- normally other composition genres.
General chess media may use problem more broadly.
Stipulation vs Goal Guessing
The stipulation is part of the rules.
Do not infer:
White probably mates;Black probably resists;queen promotion is obviously intended.
Read the actual task.
Orthodox vs Heterodox vs Fairy
These are rule/category distinctions.
They are not:
- easy;
- hard;
- realistic;
- unrealistic.
Current FIDE Laws vs Composition Codex
The WFCC Codex adopts a specific composition-law framework.
Do not silently import:
- latest OTB procedure;
- current 50/75-move administration;
- tournament clock rules
into a composition.
Legal Position vs Natural Position
Legal:
- reachable under rules/conventions.
Natural:
- aesthetically/game-like plausible.
A legal diagram can look artificial. A natural-looking diagram can be retro-illegal.
Castling vs "Prove It Was Never Moved"
Current Codex convention:
- castling allowed unless proved impossible.
This is a composition convention, not ordinary PGN game-history evidence.
En Passant vs Castling Convention
Current Codex:
- first-move en passant requires proof of the immediately preceding double step.
Do not assume the castling presumption applies symmetrically.
Soundness vs Beauty
Sound:
- technically correct.
Beautiful:
- aesthetic judgment.
A sound problem can be artistically weak. An attractive idea can be technically unsound.
One Solution vs Explicit Multiple Solutions
Default:
- author's solution only.
But:
- multiple helpmate solutions;
- twins;
- explicitly numbered solutions
can be intended content.
Therefore:
multiple solutions ≠ automatically unsound
Cook vs Dual
Cook
- unintended alternative first move / alternative solution.
Dual
- alternative continuation after the first move.
They are different defects.
Dual vs Always Fatal
Help-play:
- dualization is treated strictly.
Studies/non-helpplay:
- seriousness can be contextual;
- some duals tolerated.
Do not publish:
any dual = unsound in every genre.
Short Solution vs Fast Mate
Short solution:
- task fulfilled in fewer moves than stipulated.
In non-helpplay Codex nuance:
- existence of one shorter branch does not automatically mean a formal short solution if another required line still needs full stipulated length.
Key vs Brilliant Move
Key:
- first move of author's solution.
It can be:
- quiet;
- checking;
- sacrificial;
- flight-giving;
- obvious or hidden.
Key is a formal role, not a beauty verdict.
Threat vs Variation
Threat:
- intended continuation absent relevant Black defense.
Variation:
- branch after a defense.
Do not call every continuation a threat.
Set Play vs Actual Play
Set:
- prepared in diagram before key.
Actual:
- after key.
Set play may never occur in the played solution and still be artistic content.
Try vs Random Wrong Move
Try:
- near-solution with thematic content;
- defeated by a specific refutation.
Random failure:
- not automatically a try.
Refutation vs Defense
Defense:
- answers actual threat/solution.
Refutation:
- specifically defeats a try.
Changed vs Transferred vs Reciprocal vs Cyclic Play
Changed:
- same defense, different continuation.
Transferred:
- continuation moves to another defense/context.
Reciprocal:
- two roles swap.
Cyclic:
- three or more roles rotate.
Do not use these names as synonyms for the solution changed.
Twomover vs Easy Problem
#2 indicates stipulated length.
A two-mover can be compositionally:
- extremely sophisticated;
- phase-dense;
- difficult to solve.
Moremover vs Longer Twomover
Moremovers permit:
- logical plans;
- foreplans;
- critical moves;
- long strategic transformations.
Length changes artistic architecture.
Helpmate vs Black Defends Badly
Black is cooperating by rule.
The black moves are not mistakes.
Selfmate vs Suicide Chess
Selfmate:
- White forces a resisting Black to mate White.
It is not:
- giveaway/antichess;
- voluntary self-check;
- Black cooperation.
Half-Move Helpmate vs Decimal Chess Move
h#1.5 is specialist move-count notation.
It does not mean:
- one and a half ordinary turns in casual prose.
Define who begins.
Study vs Practical Endgame
Study:
- constructed artistic position.
Practical ending:
- selected for theory/frequency/technique.
Both can be:
- legal;
- tablebase-exact.
Purpose differs.
Tablebase Exactness vs Study Art
Tablebase:
- verifies result/move truth in coverage.
It does not evaluate:
- originality;
- economy;
- naturalness;
- paradox;
- thematic unity.
Fortress in Study vs Legal Draw Category
Fortress:
- chess mechanism.
It is not:
- separate FIDE draw category.
Retroanalysis vs "Guess the Last Move"
Retroanalysis uses constraints:
- captures;
- pawn files;
- promotions;
- checks;
- rights;
- tempos.
A last-move guess without proof is not retroanalysis.
Proof Game vs Any Legal Reconstruction
Proof game:
- exact/shortest stipulated route from initial array.
Finding any legal history is not enough when:
- length;
- uniqueness
are part of the task.
Piece Type vs Retro Identity
Two rooks can be:
- original;
- promoted.
Retro identity can matter even when current movement is identical.
Fairy Composition vs Playable Variant
Fairy composition:
- artistic task with modified rules.
Variant:
- playable game system.
The first belongs to chess composition; the second belongs to the design and play of chess variants.
Fairy Piece Name vs Rule Definition
A name such as Grasshopper is not enough for a new reader.
Define:
- move;
- capture;
- hurdles;
- restrictions.
Condition vs Theme
Fairy condition:
- changes rules.
Theme:
- formal artistic relationship.
They can coexist but are not the same layer.
Mechanism vs Theme
Mechanism:
- interference;
- clearance;
- pin;
- sacrifice.
Theme:
- formal relationship built from mechanisms.
A practical tactic and a composition theme can use the same mechanism while belonging to different conceptual layers.
Grimshaw vs Novotny
Grimshaw:
- mutual interference of differently moving line pieces on a critical square.
Novotny:
- sacrifice on the cutting point of differently moving line pieces.
Novotny vs Plachutta
Novotny:
- differently moving line pieces.
Plachutta:
- like-moving line pieces;
- sacrificial cutting-point interference.
Bristol vs Turton
Bristol:
- line clearance for a following line piece.
Turton:
- ordered line-piece doubling after a critical maneuver.
Both use line geometry but express different formal relationships.
Allumwandlung vs Any Underpromotion
Underpromotion:
- one promotion to R/B/N instead of Q.
Allumwandlung:
- thematic use of all four Q/R/B/N promotions.
Model Mate vs Ideal Mate
Model mate:
- pure + economical mating construction.
Ideal mate:
- stronger participation condition involving the forces of both sides.
Do not use beautiful mate as a technical synonym.
Echo vs Chameleon Echo
Echo:
- same mating picture/geometry repeated elsewhere.
Chameleon echo:
- echo occurs on opposite-coloured squares.
Economy vs Minimum Pieces
Economy asks:
- does every unit/function earn its presence?
It does not demand:
- absolute minimum material.
Technical Piece vs "Bad Composition"
A technical unit can be justified to:
- prevent cook;
- ensure legality;
- control flight.
Its artistic cost is judged contextually.
Difficulty vs Quality
Solver difficulty can arise from:
- hidden key;
- false tries;
- deep calculation;
- retro constraints.
Harder is not automatically better art.
Originality vs Never-Before-Seen Mechanism
Known themes can receive original:
- matrix;
- synthesis;
- setting;
- phase relation.
Originality is not limited to inventing a new named theme.
Anticipation vs Predecessor
Anticipation:
- priority conflict substantial enough under Codex definition.
Predecessor:
- earlier related work.
Not every predecessor fully anticipates the later composition.
Database Similarity vs Plagiarism
Similarity is a research signal.
Priority/originality judgment requires:
- actual thematic comparison;
- publication dates;
- independent construction context.
Computer-Tested vs Sound Forever
Software can miss issues if:
- wrong stipulation encoded;
- unsupported condition;
- wrong options;
- program bug.
Record version/options and retain human review.
Game Engine vs Composition Solver
Game engine:
- searches/evaluates adversarial chess.
Composition solver:
- enumerates stipulated solutions/conditions.
Different tools.
Computer Correctness vs Artistic Judgment
Software can help establish:
- solution;
- cooks;
- duals;
- shorts.
It cannot assign objective:
- beauty;
- unity;
- originality significance.
WCSC vs WCCI vs WCCT
WCSC
- solving championship.
WCCI
- individual composing championship.
WCCT
- team composing tournament/championship structure.
Never collapse them into world problem championship.
Composer GM vs OTB GM
Composition GM:
- composing title.
Solving GM:
- solver title.
OTB GM:
- over-the-board player title.
Same abbreviation, different discipline.
FIDE Album vs Annual Best-Of List
FIDE Albums:
- three-year selection periods;
- formal judging;
- composer-title points.
Publication date can be later than the covered period.
WCCI Current Web Page vs 2026 Decision
Older/general WCCI page:
- still describes five judges.
Magdeburg 2026 decision:
- 2025–27 cycle uses three judges;
- same group aligns with corresponding FIDE Album cycle.
Prefer the later dated official decision until consolidated rules are updated.
Curated Corpus vs Public-Domain Assumption
Chess positions are not anonymous just because the moves are legal.
Composition metadata must preserve:
- composer;
- publication;
- award;
- rights/license.
Composition literacy means knowing whether a second move is a solution, variation, dual, try, cook, twin, fairy consequence or entirely different stipulation before judging it.
Use This Reference as a Diagnostic Tool
The comparisons in this guide are most useful when a position or historical claim sits near a category boundary. Do not ask only “what label fits?” Ask what defining condition would make the neighboring label wrong? That one counterfactual often reveals whether you actually understand the terminology.
Boundary Tests Matter More Than Slogans
Several recurring distinctions deserve explicit tests:
- a second solution is a cook only when it is unintended under the stipulation;
- a second continuation is a dual only inside the relevant solution branch and must be classified by genre significance;
- a try must generate meaningful virtual play before a refutation;
- a theme is a formal relationship, not simply the presence of a tactical mechanism;
- a fairy composition is an authored task under modified rules, while a variant is primarily a playable game system;
- an award or database search is evidence about quality or priority, not proof that a work is uniquely original in all history.
When two labels remain plausible, return to stipulation, phase structure, formal definition and provenance rather than choosing the more familiar term.