Database: chessBtest
Restore : No

Operator : <
Number   : 1
Signature: field x field -> bool
Example  : query field("a1") < field("a2")
Result   :  TRUE


Operator : <
Number   : 2
Signature: material x material -> bool
Example  : query wjc feed filter[.No = 2] extract[Elem] getposition[28] pieces <  wjc feed filter[.No = 2] extract[Elem] getposition[1] pieces
Result   : FALSE


Operator : <
Number   : 3 
Signature: position x position -> bool
Example  : query wjc feed filter[.No = 2] extract[Elem] getposition[10] < wjc feed filter[.No = 2] extract[Elem] getposition[1] 
Result   : TRUE


Operator : =
Number   : 1
Signature: field x field -> bool
Example  : query field("a1") = field("a1")
Result   :  TRUE


Operator : =
Number   : 2
Signature: material x material -> bool
Example  : query wjc feed filter[.No = 2] extract[Elem] getposition[1] pieces =  wjc feed filter[.No = 2] extract[Elem] getposition[1] pieces
Result   : TRUE


Operator : =
Number   : 3
Signature: position x position -> bool
Example  : query wjc feed filter[.No = 2] extract[Elem] getposition[1]  =  wjc feed filter[.No = 2] extract[Elem] getposition[1]
Result   : TRUE


Operator : >
Number   : 1
Signature: field x field -> bool
Example  : query field("a1") > field("d6")
Result   :  FALSE


Operator : >
Number   : 2
Signature: material x material -> bool
Example  : query wjc feed filter[.No = 2] extract[Elem] getposition[28] pieces >  wjc feed filter[.No = 2] extract[Elem] getposition[1] pieces
Result   : FALSE


Operator : >
Number   : 3 
Signature: position x position -> bool
Example  : query wjc feed filter[.No = 2] extract[Elem] getposition[10] > wjc feed filter[.No = 2] extract[Elem] getposition[1] 
Result   : FALSE


Operator : ~
Number   : 1
Signature: material x material -> bool
Example  : query wjc feed filter[.No = 2] extract[Elem] getposition[6] pieces ~ wjc feed filter[.No = 2] extract[Elem] getposition[6] pieces
Result   : TRUE


Operator : ~
Number   : 2
Signature: position x position -> bool
Example  : query wjc feed filter[.No = 2] extract[Elem] getposition[6] pieces ~ wjc feed filter[.No = 2] extract[Elem] getposition[6] pieces
Result   : TRUE


Operator : above
Number   : 1
Signature: field x field -> bool
Example  : query field("a2") above field("a1")
Result   : TRUE


Operator : agent
Number   : 1
Signature: chessmove -> piece
Example  : query wjc feed filter[.No = 5] extract[Elem] getmove[7] agent
Result   : (piece "Knight")


Operator : apply_ply
Number   : 1
Signature: position x chessmove -> position
Example  : query wjc feed filter[.No = 2] extract[Elem] getposition[6] apply_ply[wjc feed filter[.No = 2] extract[Elem] getmove[7] ]
Result   :  file


Operator : attackcount
Number   : 1
Signature: position x field -> int
Example  : query wjc feed filter[.No = 4] extract[Elem] getposition[28] attackcount[field("a4")]
Result   :  1


Operator : attackedby
Number   : 1
Signature: position x piece x piece -> bool
Example  : query wjc feed filter[.No = 1] extract[Elem] getposition[28] piece("queen") attackedby[piece("Queen")]
Result   : crashes
Remark   : Bord iterator will used outside the board


Operator : attackedby
Number   : 2
Signature: position x field x piece -> bool
Example  : query wjc feed filter[.No = 5] extract[Elem] getposition[12] field("d5") attackedby[piece("Pawn")]
Result   : TRUE


Operator : attackedfrom
Number   : 1
Signature: position x piece x field -> bool
Example  : query wjc feed filter[.No = 5] extract[Elem] getposition[12] piece("pawn") attackedfrom[field("c4")]
Result   :  FALSE


Operator : attackedfrom
Number   : 2
Signature: position x field x field -> bool
Example  : query wjc feed filter[.No = 1] extract[Elem] getposition[28] field("c4") attackedfrom[field("d5")]
Result   : TRUE


Operator : below
Number   : 1
Signature: field x field -> bool
Example  : query field("a1") below field("a2")
Result   : TRUE


Operator : captured
Number   : 1
Signature: chessmove -> piece
Example  : query  wjc feed filter[.No = 5] extract[Elem] getmove[7] captured 
Result   : (piece "none")


Operator : captures
Number   : 1
Signature: chessmove -> bool
Example  : query wjc feed filter[.No = 5] extract[Elem] getmove[7] captures
Result   : FALSE


Operator : check
Number   : 1
Signature: chessmove -> bool
Example  : query wjc feed filter[.No = 5] extract[Elem] getmove[7] check 
Result   : FALSE


Operator : checkmate
Number   : 1
Signature: position -> bool
Example  : query checkmate(wjc feed filter[.No = 42] extract[Elem] getposition[70])
Result   : TRUE


Operator : east
Number   : 1
Signature: field -> field
Example  : query east( field("a1") )
Result   : (field "b1")


Operator : endfield
Number   : 1
Signature: chessmove -> field
Example  : query endfield(wjc feed filter[.No = 5] extract[Elem] getmove[7])
Result   : (field "f3")


Operator : enpassant_field
Number   : 1
Signature: chessmove -> field
Example  : query enpassant_field(wjc feed filter[.No = 5] extract[Elem] getmove[7])
Result   : (field undef)


Operator : is_even
Number   : 1
Signature: int -> bool
Example  : query is_even(2)
Result   : TRUE


Operator : exists
Number   : 1
Signature: stream(ANY) x (ANY -> bool)  -> bool
Example  : query wjc feed filter[.No = 0] extract[Elem] getposition[6] pos_fields exists[.Piece = piece("knight")]
Result   : crashes 


Operator : field
Number   : 1
Signature: string -> field
Example  : query field( "a1" )
Result   : (field "a1")


Operator : column 
Number   : 1
Signature: field -> string
Example  : query column( field("a1") )
Result   : "a"


Operator : forall
Number   : 1
Signature: stream(ANY) x (ANY -> bool)  -> bool
Example  : query wjc feed filter[.No = 0] extract[Elem] getposition[6] pos_fields forall[.Piece = piece("none")]
Result   : crashes


Operator : getkey
Number   : 1
Signature: chessgame x string -> string
Example  : query wjc feed filter[.No = 2] extract[Elem] getkey ["Event"]
Result   : "WJun" 


Operator : getmove
Number   : 1
Signature: chessgame x int -> chessmove
Example  : query wjc feed filter[.No = 2] extract[Elem] getmove [3]
Result   : file


Operator : getposition
Number   : 1
Signature: chessgame x int -> position
Example  : query wjc feed filter[.No = 2] extract[Elem] getposition[6]
Result   : file


Operator : history
Number   : 1
Signature: chessgame -> stream(tuple([No: int, Pos: position, Move: chessmove]))
Example  : query wjc feed filter[.No = 2] extract[Elem] history head[3] consume
Result   : file


Operator : includes
Number   : 1
Signature: position x position -> bool
Example  : query wjc feed filter[.No = 2] extract[Elem] getposition[34] includes [ wjc feed filter[.No = 2] extract[Elem] getposition[34] ]
Result   : TRUE


Operator : is
Number   : 1
Signature: piece x piece -> bool
Example  : query piece( "Pawn" ) is piece( "pawn" )
Result   : TRUE


Operator : is_castling
Number   : 1
Signature: chessmove -> bool
Example  : query is_castling( wjc feed filter[.No = 5] extract[Elem] getmove[7] )
Result   : FALSE


Operator : is_enpassant
Number   : 1
Signature: chessmove -> bool
Example  : query is_enpassant(wjc feed filter[.No = 5] extract[Elem] getmove[7])
Result   : FALSE


Operator : is_mate
Number   : 1
Signature: chessmove -> bool
Example  : query is_mate( wjc feed filter[.No = 5] extract[Elem] getmove[7] )
Result   : FALSE


Operator : is_neighbor
Number   : 1
Signature: field x field -> bool
Example  : query field("a1") is_neighbor field("a2")
Result   : TRUE


Operator : is_stalemate
Number   : 1
Signature: chessmove -> bool
Example  : query is_stalemate(wjc feed filter[.No = 5] extract[Elem] getmove[7])
Result   : FALSE


Operator : iswhite
Number   : 1
Signature: field -> bool
Example  : query iswhite( field("a1") )
Result   : FALSE


Operator : lastmove
Number   : 1
Signature: chessgame -> int
Example  : query lastmove( wjc feed filter[.No = 2] extract[Elem] )
Result   : 72


Operator : left
Number   : 1
Signature: field x field -> bool
Example  : query field("a1") left field("b1")
Result   : TRUE


Operator : moveNo
Number   : 1
Signature: position -> int
Example  : query wjc feed filter[.No = 2] extract[Elem] getposition[5] moveNo
Result   : 5


Operator : moves
Number   : 1
Signature: chessgame -> stream(chessmove)
Example  : query wjc feed filter[.No = 2] extract[Elem] moves transformstream head[3] consume
Result   :  file


Operator : neighbors
Number   : 1
Signature: field -> stream( field )
Example  : query field("a1") neighbors printstream count
Result   : 3


Operator : north
Number   : 1
Signature: field -> field
Example  : query north( field("a1") )
Result   : (field "a2")


Operator : northeast
Number   : 1
Signature: field -> field
Example  : query northeast( field("a1") )
Result   : (field "b2")


Operator : northwest
Number   : 1
Signature: field -> field
Example  : query northwest( field("a1") )
Result   : (field undef)


Operator : is_odd
Number   : 1
Signature: int -> bool
Example  : query is_odd(2)
Result   : FALSE


Operator : piece
Number   : 1
Signature: string -> piece
Example  : query piece( "Pawn" )
Result   : (piece "Pawn")


Operator : piece_moves
Number   : 1
Signature: position x piece -> stream(tuple([SPiece: piece, SField: field,EPiece: piece, EField: field]))
Example  : query wjc feed filter[.No = 2] extract[Elem] getposition[6] piece_moves [piece("Queen")] consume
Result   : file


Operator : piece_moves_blocked
Number   : 1
Signature: position x piece -> stream(tuple([SPiece: piece, SField: field, BPiece: piece, BField: field, EPiece: piece, EField: field]))
Example  : query wjc feed filter[.No = 2] extract[Elem] getposition[6] piece_moves_blocked[piece("Pawn")] consume
Result   : file


Operator : piececount
Number   : 1
Signature: material x piece -> int
Example  : query wjc feed filter[.No = 2] extract[Elem] getposition[1] pieces piececount[piece("Queen")]
Result   : 1


Operator : pieces
Number   : 1
Signature: position -> material
Example  : query wjc feed filter[.No = 2] extract[Elem] getposition[6] pieces
Result   : file


Operator : piecevalue
Number   : 1
Signature: piece -> real
Example  : query piecevalue( piece( "Pawn" ) ) = 1
Result   : TRUE


Operator : pos_fields
Number   : 1
Signature: position -> stream( tuple( [Field: field, Piece: piece] ) )
Example  : query wjc feed filter[.No = 2] extract[Elem] getposition[6] pos_fields consume
Result   : file


Operator : pos_moves
Number   : 1
Signature: position x piece -> stream(tuple([SPiece: piece, SField: field, EPiece: piece, EField: field]))
Example  : query wjc feed filter[.No = 2] extract[Elem] getposition[6] pos_moves consume
Result   : file


Operator : pos_moves_blocked
Number   : 1
Signature: position -> stream(tuple([SPiece: piece, SField: field, BPiece: piece, BField: field, EPiece: piece, EField: field]))
Example  : query wjc feed filter[.No = 2] extract[Elem] getposition[6] pos_moves_blocked consume
Result   : file


Operator : positions
Number   : 1
Signature: chessgame->stream(position)
Example  : query wjc feed filter[.No = 2] extract[Elem] positions transformstream head[3] consume
Result   : file


Operator : posrange_b
Number   : 1
Signature: position x field x field -> position
Example  : query wjc feed filter[.No = 2] extract[Elem] getposition[6] posrange_b[field("a1"), field("c3")]
Result   : file


Operator : protectcount
Number   : 1
Signature: position x field -> int
Example  : query wjc feed filter[.No = 0] extract[Elem] getposition[6] protectcount[field("c5")]
Result   : 1


Operator : protectedby
Number   : 1
Signature: position x field x piece -> bool
Example  : query wjc feed filter[.No = 2] extract[Elem] getposition[28] field("b3") protectedby[piece("Pawn")]
Result   : FALSE


Operator : protectedby
Number   : 2
Signature: position x piece x piece -> bool
Example  : query wjc feed filter[.No = 2] extract[Elem] getposition[28] piece("pawn") protectedby[piece("pawn")]
Result   : TRUE


Operator : protectedfrom
Number   : 1
Signature: position x piece x field -> bool
Example  : query wjc feed filter[.No = 5] extract[Elem] getposition[12] piece("Pawn") protectedfrom[field("c1")]
Result   : TRUE


Operator : protectedfrom
Number   : 2
Signature: position x field x field -> bool
Example  : query wjc feed filter[.No = 2] extract[Elem] getposition[28] field("d5") protectedfrom[field("e6")]
Result   : FALSE


Operator : readpgn
Number   : 1
Signature: text -> stream(chessgame)
Example  : query readpgn('wjc.pgn') count
Result   : 359


Operator : right
Number   : 1
Signature: field x field -> bool
Example  : query field("d2") right field("c2")
Result   : TRUE


Operator : row
Number   : 1
Signature: field -> int
Example  : query row( field("a1") )
Result   : 1


Operator : samecolor
Number   : 1
Signature: piece x piece -> bool
Example  : query piece( "Pawn" ) samecolor piece( "Queen" )
Result   : TRUE


Operator : south
Number   : 1
Signature: field -> field
Example  : query south( field("a1") )
Result   : (field undef)


Operator : southeast
Number   : 1
Signature: field -> field
Example  : query southeast( field("a1") )
Result   : (field undef)


Operator : southwest
Number   : 1
Signature: field -> field
Example  : query southwest( field("a1") )
Result   : (field undef)


Operator : stalemate
Number   : 1
Signature: position -> bool
Example  : query stalemate(wjc feed filter[.No = 2] extract[Elem] getposition[6])
Result   : FALSE


Operator : startfield
Number   : 1
Signature: chessmove -> field
Example  : query startfield(wjc feed filter[.No = 5] extract[Elem] getmove[7])
Result   : (field "g1")


Operator : twotuples
Number   : 1
Signature: stream(tuple(X)) -> stream(tuple([X1, X2]))
Example  : query wjc feed head[1] extract[Elem] history twotuples count 
Result   : 38


Operator : west
Number   : 1
Signature: field -> field
Example  : query west( field("a1") )
Result   : (field undef)