Soundness
Key
Line effects
Pins & unpins
Playing on specific squares
Changed play
Single phase
Two phase
Multiphase
Maneuvers
Correction
Misc/Unsorted
Retrograde analysis
Checks
Tempo
Pawns
Logical
Sacrifice
Batteries
Decoy & Deflect
Selfblocks & unblocks
Interference
Model mates
Checkmate patterns
System
Cooked
Unsound
Shortmate
Dual
Illegal position
Checking key
Flight giving key
Flight taking key
Flight giving and taking key
2 flights giving key
3+ flights giving key
Barulin (A)
Somov (B1)
B2
Isaev
Levman
Pinning
Indirect pinning
Selfpinning
Indirect selfpinning
Unpinning
Indirect unpinning
Half-pin
Third-pin
Fourth-pin
Pelle move
Schiffmann
Nietvelt
Kin — BS
WS — Asy
King star flight
King Y-flight
BK star
WK star
BB star
WB star
BQ star
WQ star
BK cross
WK cross
BR cross
WR cross
BQ cross
WQ cross
BS wheel
WS wheel
Pickaninny
Albino
Play on same square
Mates on same square
Defences on same square
Defences on the threat square
Rovno
Umnov
Loshinski magnet
Keller paradox
Corner to corner
Four corners
Platzwechsel
Asymmetrical solution
Changed mates
Mutate
Reciprocal
Lacny
Lacny 4-fold
Lacny 5-fold
Transferred mates
Rukhlis
Ideal Rukhlis
Fleck
Karlstrom-Fleck
Reversal
Threat reversal
Anti-reversal
Threat anti-reversal
Le Grand
Pseudo Le Grand
Shedey cycle
Erokhin
Kiss cycle
Lender combination
Jurasevic cycle
Pseudo Jurasevic cycle
Rudenko
Bar — Ric
Ric — She
Barnes
Urania
Banny
Vladimirov
Ukrainian
Ukrainian 4-fold
Ukrainian 5-fold
Zagoruiko
Dombrovskis
Hannelius
Stocchi
Banny cycle
Complete Lacny
Complete Shedey cycle
Rice cycle 4-fold
Rice cycle
Shedey cycle 4-fold
Run — Ind
Dou — Che
Rundlauf
Switchback
Ambush
Zigzag
Snake
Pendulum maneuver
Staircase
Reti maneuver
Herlin maneuver
Systematic movement
Critical move
Anti-critical move
Bristol
Anti-Bristol
Indian
Doubling
Turton doubling
Zepler doubling
Loyd clearance
Loyd-Turton
Brunner-Turton
Cheney-Loyd
Black correction
Secondary black correction
Tertiary black correction
4th degree black correction
5th degree black correction
White correction
Secondary white correction
Tertiary white correction
4th degree white correction
5th degree white correction
Arrival correction
No — Ame
One — Cyc
No pawns
Block
Valladao
Dual avoidance
White combinations
Domination
Focal
Annihilation
Castling
Grotesque
White minimal
Duel
Task
Perpetuum mobile
American Indian
Oneliner
Christmas tree
ODT
Zilahi
Cyclic Zilahi
Retro
Cantcastler
Ceriani-Frolkin
PRA
Provoked check
Cross-checks
Check - Non-check
Half check
Perpetual check
Tempo move
Tempo duel
Win of tempo
Loss of tempo
Pseudo-twomover
En passant
Promotion
White underpromotion
Black underpromotion
Excelsior
Allumwandlung
Babson
Holst
Phoenix
Logical problem
Roman theme
Anti-Roman defence
Dresden theme
Anti-Dresden defence
Hamburg theme
Elbe theme
Swiss theme
Berlin theme
Munich theme
Active sacrifice
Passive sacrifice
Clearance sacrifice
Sequential sacrifice of different units
Multiple sacrifice of a single unit
Battery play
Half-battery
Third-battery
Siers battery
Popandopulo batteries
Mansfield battery
Rehm device
Two step battery
Battery creation
Battery destruction
Indirect battery
Anti-battery
Decoy
Deflect
Incarceration
Mousetrap
Seeberger
Selfblock
Remote selfblock
Mutual block
3-fold cyclic block
4-fold cyclic block
Unblock
Remote unblock
Stocchi blocks
Bikos
Gri — Mas
Dou — Ant
Grimshaw
Novotny
Latvian Novotny
Azerbaijani Novotny
Finnish Novotny
Romanian Novotny
English Novotny
Perfect Novotny
Sequential Novotny
Holzhausen
Plachutta
Wurzburg-Plachutta
Organ pipes
Pickabish
Masked interference
Double interference
Anticipatory interference
Interference through the BK
Valve
Bi-valve
Gamage
Goethart
Anti-Goethart
Model mates
Ideal mates
Echo mates
Chameleon echo mates
Octet
Models with pin
Models with two pins
Models with three pins
Changed model mates
Bohemian task
New Bohemian school
Vienna school
Ana — Epa
Gre — Swa
Anastasia's mate
Anderssen's mate
Arabian mate
Back-rank mate
Bishop and knight checkmate
Blackburne's mate
Box mate
Corner mate
Cozio's mate
Damiano's bishop mate
Damiano's mate
David and Goliath mate
Double bishop mate
Dovetail mate
Epaulette mate
Greco's mate
h-file mate
Hook mate
King and two bishops checkmate
King and two knights checkmate
Lolli's mate
Max Lange's mate
Morphy's mate
Opera mate
Pillsbury's mate
Queen mate
Reti's mate
Smothered mate
Suffocation mate
Swallow's tail mate
Attention
To delete
Locked
YAML field
Option
Condition
Piece
Fairy piece specification
Common keyword
authors
source
reprints
award
algebraic
fen
stipulation
intended-solutions
options
twins
solution
keywords
comments
Defence
Duplex
EnPassant
HalfDuplex
Hole
MaxFlightsquares
NoCastling
PostKeyPlay
Quodlibet
SetPlay
Threat
Variation
AMU — Ant
Ant — Bic
Bla — Bla
Bla — Cha
Cha — Dia
Dia — Fil
Fil — Isa
KoB — Mas
Max — NoI
NoW — Pro
Pro — Sne
Sne — Ult
Ult — Whi
Whi — Wor
AMU
ActuatedRevolvingBoard
ActuatedRevolvingCentre
AlphabeticChess
AndernachChess
AnnanChess
AntiAndernachChess
AntiCirce Cheylan
AntiCirce Clone
AntiCirce Couscous
AntiCirce( Calvet)?
AntiEinsteinChess
AntiKings
AntiMarsAntipodeanCirce
AntiMarsCirce
AntiMarsMirrorCirce
AntiSuperCirce
Antikoeko
AntipodeanAntiCirce
AntipodeanCirce
AntipodeanImmunChess
AprilChess
ArgentinianChess
BGL
BackHome
BackToBack
BiHeffalumps
BiWoozles
BichromChess
Bicolores
BlackAntiSynchronMover
BlackChecks
BlackConsequentForcedSquare
BlackEdgemover
BlackFollowMyLeader
BlackForcedSquare
BlackMaxDister
BlackMaximummer
BlackMinDister
BlackMinimummer
BlackMustCapture
BlackMustCheck
BlackOscillatingKings
BlackPromSquares
BlackReflectiveKing
BlackRoyalSquare
BlackSuperTransmutingKing
BlackSynchronMover
BlackTransmutedKing
BlackUltraSchachZwang
BlackVaultingKing
Bolero
BoleroInverse
Breton( Adverse)?
BrunnerChess
CastlingChess
CavalierMajeur
CentralChess
ChameleonChess
ChameleonCirce
ChameleonPursuit
ChecklessChess
CheekToCheek
ChineseChess
Circe( RexInclusiv)?
CirceAssassin
CirceClone
CirceDoubleAgents
CirceTake&Make
CirceTurncoats
ContactGridChess
ContraParrainCirce
CouscousCirce
DiagramAntiCirce
DiagramCirce
DiagramImmunChess
DiametralCirce
Disparate
DoubleTibet
DuellistChess
EiffelChess
EinsteinChess
EquipollentsAntiCirce
EquipollentsCirce
EquipollentsImmunChess
ExclusiveChess
ExtinctionChess
FaceToFace
FileAntiCirce
FileCirce
FileImmunChess
Football( [A-Z0-9]+)?
FrischaufCirce
FunctionaryChess
GenevaChess
GhostChess
GlasgowChess
GridChess
HaanerChess
Heffalumps
Hypervolage
Imitator ([a-h][1-8])+
ImmunChess
Influencer
Isardam
KoBulKings
KoeKo
Leofamily
LineChameleonChess
Lortap
LosingChess
LostPieces
MAFF
Madrasi( RexInclusiv)?
MagicSquares ([a-h][1-8])+
Make&TakeChess
MarineChess
MarsMirrorCirce
Marscirce
Masand
Maximummer
MessignyChess( RexExclusiv)?
MirrorAntiCirce
MirrorCirce
MirrorCirceClone
MirrorCouscousCirce
MirrorFileCirce
MirrorFileImmunChess
MirrorImmunChess
MonochromChess
NewKoeko
NoBlackCapture
NoBlackPromotion
NoCapture
NoIProm
NoWhiteCapture
NoWhitePromotion
NormalPawn
NorskSjakk
OWU
PWC
ParrainCirce
PartialParalysis
Patrouille
PhantomChess
PhantomChess( RexInclusiv)?
PlusChess
PointReflection
PromOnly
ProteanChess( RexExclusiv)?
ProvocationChess
ReflectiveKings
RelegationChess
RepublicanChess
ReversalEinsteinChess
RexInclusiv
RoleExchange
RoyalDynasty
SAT
Sentinelles
Sentinelles( (PionAdvers|PionNeutre|ParaSentinelles|Berolina))?( Maximum(White|Black|Total) [0-9]+)?
SeriesCapture
ShieldedKings
SingleBox
SnekChess
SnekCircleChess
StingChess
StrictSAT
SuperCirce
SuperGuards
SwappingKings
SymmetryAntiCirce
SymmetryCirce
SymmetryImmunChess
Take&MakeChess
Tibet
TraitorChess
TransmutedKings
UltraPatrol
UltraSchachZwang
UltramarineChess
VaultingKings
VerticalMirrorCirce
VogtlaenderChess
Volage
WhiteAntiSynchronMover
WhiteConsequentForcedSquare
WhiteEdgemover
WhiteFollowMyLeader
WhiteForcedSquare
WhiteMaxDister
WhiteMaximummer
WhiteMinDister
WhiteMinimummer
WhiteMustCapture
WhiteMustCheck
WhiteOscillatingKings
WhitePromSquares
WhiteReflectiveKing
WhiteRoyalSquare
WhiteSuperTransmutingKing
WhiteSynchronMover
WhiteTransmutedKing
WhiteUltraSchachZwang
WhiteVaultingKing
Woozles
Wormholes ([a-h][1-8])+
15 — B
B1 — Bt
Bu — Do
Dr — G2
G3 — Ko
Kp — Ml
Mm — Or
P — Rf
Rh — S4
Sa — Va
Wa — Gy
1,5-leaper (15)
1,6-leaper (16)
2,4-leaper (24)
2,5-leaper (25)
3,5-leaper (35)
3,6-leaper (36)
3,7-leaper (37)
Eagle (Ad)
Maohopper (Ah)
Alfil (Al)
Amazon (Am)
Antelope (An)
Maorider (Ao)
Archbishop (Ar)
Bishop (B)
Bouncer (B1)
Rook bouncer (B2)
Bishop bouncer (B3)
Bishop eagle (Be)
Bishop hopper (Bh)
Bison (Bi)
Bouncy knight (Bk)
Bishop-lion (Bl)
Bishop moose (Bm)
Bouncy nightrider (Bn)
Bob (Bo)
Berolina pawn (Bp)
Bishop/rook hunter (Br)
Berolina superpawn (Bs)
Boyscout (Bt)
Root-25-leaper (bucephale) (Bu)
Bishop sparrow (Bw)
Cardinal (C)
Camel (Ca)
Contra grasshopper (Cg)
Camelrider hopper (Ch)
Chinese pawn (Cp)
Camelrider (Cr)
CAT (cavalier trojan) (Ct)
Charybdis (Cy)
Dabbabba (Da)
Doublebishopper (Db)
Doublegrasshopper (Dg)
Doublerookhopper (Dk)
Dolphin (Do)
Dragon (Dr)
("Diagonalspiralspringer") (Ds)
Dummy (Du)
Eagle (Ea)
Edgehog (Eh)
Erlking (Ek)
Empress (Em)
Equihopper (Eq)
Elephant (Et)
Friend (F)
Faro (Fa)
Fers (Fe)
Fersrider (Fr)
Grasshopper (G)
Grasshopper-2 (G2)
Grasshopper-3 (G3)
Greater treehopper (Ge)
Greater leafhopper (Gf)
Gnurider hopper (Gh)
Giraffe (Gi)
Gral (Gl)
Gnu (Gn)
Gnurider (Gr)
Girlscout (Gt)
Hamster (Ha)
King (K)
Kangaroo (Ka)
Kinghopper (Kh)
Kangarou lion (Kl)
Kao (Ko)
Knighthopper (Kp)
Locust (L)
Bishop locust (Lb)
Leo (Le)
Leafhopper (Lh)
Lion (Li)
Nightrider locust (Ln)
Loco (Lo)
Rook locust (Lr)
Rose locust (Ls)
Moose (M)
Mao (Ma)
Marguerite (Mg)
Marine ship (Mh)
Maorider lion (Ml)
Moarider lion (Mm)
Moa (Mo)
Marine pawn (Mp)
Marine knight (Ms)
Nightrider (N)
Nao (Na)
Nereide (Nd)
Nonstop equihopper (Ne)
Nightrider hopper (Nh)
Nightrider lion (Nl)
Orphan (O)
Moarider (Oa)
Moahopper (Oh)
Okapi (Ok)
Orix (Or)
Pawn (P)
Pao (Pa)
Poseidon (Po)
Reverse pawn (Pp)
Princess (Pr)
Queen (Q)
Equi english (Qe)
Equi french (Qf)
Quintessence (Qn)
Querquisite (Qq)
Rook (R)
Rao (Ra)
Reflecting bishop (Rb)
Rook eagle (Re)
Root-50-leaper (Rf)
Rook hopper (Rh)
Radial leaper (aka radial knight) (Rk)
Rook-lion (Rl)
Rook moose (Rm)
Rose-lion (Rn)
Rose-hopper (Rp)
Rose (Ro)
Rook/bishop hunter (Rr)
Rabbit (Rt)
Rook sparrow (Rw)
Knight (S)
(1,1)-Zigzag Nightrider (S1)
(2,0)-Zigzag Nightrider (S2)
(3,3)-Zigzag Nightrider (S3)
(4,0)-Zigzag Nightrider (S4)
Saltador (Sa)
Senora (Se)
Ship (Sh)
Sirene (Si)
Skylla (Sk)
Scorpion (So)
Superpawn (Sp)
Squirrel (Sq)
("Spiralspringer") (Ss)
Sting (St)
Sparrow (Sw)
Treehopper (Th)
Triton (Tr)
Ubiubi (Uu)
Vao (Va)
Waran (Wa)
Wazir (We)
Wazirrider (Wr)
Zebra (Z)
Zebu (Ze)
Zebrarider hopper (Zh)
Zebrarider (Zr)
X/Y hunter (X/Y)
Orix (non-stop) (No)
Gryphon (Gy)
Chameleon
Jigger
Kamikaze
Paralysing
Royal
Volage
Functionary
HalfNeutral
HurdleColourChanging
Protean
Magic
Uncapturable
Soundness
Key
Line effects
Pins & unpins
Playing on specific squares
Changed play
Single phase
Two phase
Multiphase
Maneuvers
Correction
Misc/Unsorted
Retrograde analysis
Checks
Tempo
Pawns
Logical
Sacrifice
Batteries
Decoy & Deflect
Selfblocks & unblocks
Interference
Model mates
Checkmate patterns
System
Cooked
Unsound
Shortmate
Dual
Illegal position
Checking key
Flight giving key
Flight taking key
Flight giving and taking key
2 flights giving key
3+ flights giving key
Barulin (A)
Somov (B1)
B2
Isaev
Levman
Pinning
Indirect pinning
Selfpinning
Indirect selfpinning
Unpinning
Indirect unpinning
Half-pin
Third-pin
Fourth-pin
Pelle move
Schiffmann
Nietvelt
King star flight
King Y-flight
BK star
WK star
BB star
WB star
BQ star
WQ star
BK cross
WK cross
BR cross
WR cross
BQ cross
WQ cross
BS wheel
WS wheel
Pickaninny
Albino
Play on same square
Mates on same square
Defences on same square
Defences on the threat square
Rovno
Umnov
Loshinski magnet
Keller paradox
Corner to corner
Four corners
Platzwechsel
Asymmetrical solution
Changed mates
Mutate
Reciprocal
Lacny
Lacny 4-fold
Lacny 5-fold
Transferred mates
Rukhlis
Ideal Rukhlis
Fleck
Karlstrom-Fleck
Reversal
Threat reversal
Anti-reversal
Threat anti-reversal
Le Grand
Pseudo Le Grand
Shedey cycle
Erokhin
Kiss cycle
Lender combination
Jurasevic cycle
Pseudo Jurasevic cycle
Rudenko
Barnes
Urania
Banny
Vladimirov
Ukrainian
Ukrainian 4-fold
Ukrainian 5-fold
Zagoruiko
Dombrovskis
Hannelius
Stocchi
Banny cycle
Complete Lacny
Complete Shedey cycle
Rice cycle 4-fold
Rice cycle
Shedey cycle 4-fold
Rundlauf
Switchback
Ambush
Zigzag
Snake
Pendulum maneuver
Staircase
Reti maneuver
Herlin maneuver
Systematic movement
Critical move
Anti-critical move
Bristol
Anti-Bristol
Indian
Doubling
Turton doubling
Zepler doubling
Loyd clearance
Loyd-Turton
Brunner-Turton
Cheney-Loyd
Black correction
Secondary black correction
Tertiary black correction
4th degree black correction
5th degree black correction
White correction
Secondary white correction
Tertiary white correction
4th degree white correction
5th degree white correction
Arrival correction
No pawns
Block
Valladao
Dual avoidance
White combinations
Domination
Focal
Annihilation
Castling
Grotesque
White minimal
Duel
Task
Perpetuum mobile
American Indian
Oneliner
Christmas tree
ODT
Zilahi
Cyclic Zilahi
Retro
Cantcastler
Ceriani-Frolkin
PRA
Provoked check
Cross-checks
Check - Non-check
Half check
Perpetual check
Tempo move
Tempo duel
Win of tempo
Loss of tempo
Pseudo-twomover
En passant
Promotion
White underpromotion
Black underpromotion
Excelsior
Allumwandlung
Babson
Holst
Phoenix
Logical problem
Roman theme
Anti-Roman defence
Dresden theme
Anti-Dresden defence
Hamburg theme
Elbe theme
Swiss theme
Berlin theme
Munich theme
Active sacrifice
Passive sacrifice
Clearance sacrifice
Sequential sacrifice of different units
Multiple sacrifice of a single unit
Battery play
Half-battery
Third-battery
Siers battery
Popandopulo batteries
Mansfield battery
Rehm device
Two step battery
Battery creation
Battery destruction
Indirect battery
Anti-battery
Decoy
Deflect
Incarceration
Mousetrap
Seeberger
Selfblock
Remote selfblock
Mutual block
3-fold cyclic block
4-fold cyclic block
Unblock
Remote unblock
Stocchi blocks
Bikos
Grimshaw
Novotny
Latvian Novotny
Azerbaijani Novotny
Finnish Novotny
Romanian Novotny
English Novotny
Perfect Novotny
Sequential Novotny
Holzhausen
Plachutta
Wurzburg-Plachutta
Organ pipes
Pickabish
Masked interference
Double interference
Anticipatory interference
Interference through the BK
Valve
Bi-valve
Gamage
Goethart
Anti-Goethart
Model mates
Ideal mates
Echo mates
Chameleon echo mates
Octet
Models with pin
Models with two pins
Models with three pins
Changed model mates
Bohemian task
New Bohemian school
Vienna school
Anastasia's mate
Anderssen's mate
Arabian mate
Back-rank mate
Bishop and knight checkmate
Blackburne's mate
Box mate
Corner mate
Cozio's mate
Damiano's bishop mate
Damiano's mate
David and Goliath mate
Double bishop mate
Dovetail mate
Epaulette mate
Greco's mate
h-file mate
Hook mate
King and two bishops checkmate
King and two knights checkmate
Lolli's mate
Max Lange's mate
Morphy's mate
Opera mate
Pillsbury's mate
Queen mate
Reti's mate
Smothered mate
Suffocation mate
Swallow's tail mate
Attention
To delete
Locked
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Specification:
Chameleon
Jigger
Kamikaze
Paralysing
Royal
Volage
Functionary
HalfNeutral
HurdleColourChanging
Protean
Magic
Uncapturable
0+0
Matrix:
Mirror & rotation
Vertical shifts
Horizontal shifts
×
×
(
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#2
#3
#4
#5-9
#n
h#2
h#3
h#4
h#5-9
h#n
s#2
s#3
s#4
s#5-9
s#n
r#2
r#3
r#4
r#5-9
r#n
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h=n
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hs=n
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