Examples

Basic searches Search Expression
Author 'Fabel'
A='Fabel'
First name of author = 'Karl'
FIRSTNAME='Karl'
Source 'feenschach'
Original Source 'feenschach'
Reprint Source 'feenschach'
S='feenschach'
ORIGINALS='feenschach'
REPRINTS='feenschach'
Source number '123'
Original source number '123'
Reprint source number '123'
SOURCENO='123'
ORIGINALSOURCENO='123'
REPRINTSOURCENO='123'
Problem number '123'
Original problem number '123'
Reprint problem number '123'
PROBNO='123'
ORIGINALPROBNO='123'
REPRINTPROBNO='123'
Year 1999
Original year '1999'
Reprint year '1999'
YEAR='1999'
ORIGINALYEAR='1999'
REPRINTYEAR='1999'
Dec. 31, 1999
Original Source 'feenschach'
Reprint Source 'feenschach'
DATE='31/12/1999'
Feb. 1999
YEAR='1999' AND MONTH='02'
Unique PDB problem id 'P0004254'
PROBID='P0004254'
Genre 'retro'
G='Retro'
Stipulation contains the expression '#2')
STIP='#2'
Solution contains the expression '1. Kg2'
SOL='1. Kg2'
Keyword 'Albino'
K='Albino'
Keyword 'Circe' with addition 'Anti-'
K='Circe:Anti-'
Piece 'Taxi'
PIECE='Taxi'
Piece Symbol 'BI'
PIECESYMBOL ='BI'
Dedication contains the expression 'K. Fabel gewidmet'
D='Fabel'
Award contains the expression '1. Preis'
AWARD='1. Preis'
Stipulation contains the word 'retro'
STIP='retro'
Comment contains the word 'cook'
COMMENT='cook'
user comment contains the word 'OK'
USERCOMMENT='OK'
user comment by user 'Wilts'
USERCOMMENTUSER='Wilts'
Cooked problem
COOKED
Computer tested problem
CPLUS
Computer Test Comment contains the word 'Popeye'
CPLUSCOMMENT='Popeye'
Number of white pieces = 3
WPIECES = 3
Number of black pieces less than 7
BPIECES < 7
Number of neutral pieces greater than 2
NPIECES > 2
Total number of pieces less or equal than 7
APIECES <= 7
New comments since January 15th 2007
COMMENTDATE > 20071115
Problems added after March 30th 2007
CREATIONDATE > 20070330
Problems created by user 'Wilts'
CREATIONUSER ='Wilts'
Problems changed after March 30th 2007
CHANGEDATE > 20070330
Problems last changed by user 'Wilts'
CHANGEUSER ='Wilts'
Piece pattern in diagram position
PATTERN='sLa1 sTb1 sTc1 sLd1'

This example searches for Loyd's organ pipes. The pattern is searched for in all of its possible translated, rotated and mirrored versions. Please note that searching for patterns takes considerably more time than the other searches, so please allow for 2 or 3 minutes for each pattern search.
Position in diagram position
POSITION='sLa1 sTb1 sTc1 sLd1'

This example searches for problems with the specified pieces in the diagram.
Piece list
PIECELIST='DtLL'

The diagram contains white Queen, black Rook and two white Bishops.
PIECELIST=='KkLS'

The diagram contains white King, white Bishop, white Knight and black King.
Boolean operators Search Expression
AND
S='feenschach' AND A='Müller'
OR
S='feenschach' OR S='Die Schwalbe'
NOT
NOT STIP = 'KBP'
AND and OR combined
(S='feenschach' OR S='Die Schwalbe') AND A='Müller'
Wild cards Search Expression
Author 'Müller' or author 'Muller' or author 'Möller' etc.
A='M%ller'

The percent sign specifies any number of any characters.
Solution contains promotion into arbitrary piece on a8
SOL='a8=_'

The underscore _ specifies any character.
Solution contains promotion into Bishop or Knight on square a8
SOL='a8=[LS]'

The square brackets [] specify a specific list of characters.
Solution contains promotion into Rook on a8, b8, c8 or d8
SOL='[abcd]8=T'

The square brackets [] specify a specific list of characters.