Home

Get a PDF of the 2024 edition here

2008 Edition of the
Online Guide to the Engima


Preface to the Guide
History of the NPL
Membership Information
Sharing the Puzzles
      Sharing the fun
      Combining Talents
Composing
Editorial Verses
Flats
      Acrostical Enigma
      Alternade
      Ambigram
      Anagram
      Antigram
      Apt. . .
      Backswitch
      Baltimore Deletion
      Baltimore Transdeletion
      Beheadment
      Bigram. . .
      Brookline Letter-Change
      Change of Heart
      Changeover
      Charade
      Combination Padlock
      Consonantcy
      Curtailment
      Deletion
      Diastichal Enigma
      Double-Cross
      Dropout
      Enigma
      Enigmatic Rebus
      False derivative
      FWNFR
      Group flat
      Head-to-Tail Shift
      Heart Transplant
      Heteronym
      Homoantonym
      Homoconcominym
      Homonym
      Homosynonym
      Interlock
      Letter Bank
      Letter Change
      Letter Shift
      Linkade
      Literatim
      Metathesis
      Mutation
      Mynoreteh
      Order Takeout
      Overloaded. . .
      Padlock
      Palindrome
      Phonetic. . .
      Phrase Shift
      Picture. . .
      Progressive. . .
      Rebade
      Rebus
      Redro takeout
      Repeated-Letter Change
      Repeated-Letter Deletion
      Reversal
      Reversed. . .
      Riddle
      Sound Change
      Sound Shift
      Spoonergram
      Subade
      Suber
      Switchback
      Telestichal Enigma
      Terminal Deletion
      Transaddition
      Transade
      Trans-Cross
      Transdeletion
      Transpogram
      Transposal
      Trigram. . .
      Welded. . .
      Word Deletion
      Word Substitution
      Solving the Rebus
      Browse the Flat Pages
Introduction to Forms
      From A to O
      From P to Z
      Form Modifiers
Cryptograms
      Constructing Medium Crypts
      Solving Cryptograms
      Other Solving Approaches
Extras
      Solving Cryptics
      Composing Cryptics
      Observations
Reference Books
Constitution
      Bylaws
Glossary
Supplements
      Non-Guide Flats
      Non-Guide Forms
      Non-Guide Extras
      Where to Find It
      Form Notation
      Italian Picture Puzzles
      Abbreviated Guide to Flats
      Mobile Guide to Flats
      Submissions
Errata


© Copyright 2013 by
the National Puzzlers' League
 DOUBLE-CROSS

Two words or phrases are each divided into two pieces; then their second pieces are switched to form two others. Example: ONE = maids, TWO = rapture, THREE = mature, FOUR = rapids. (This would appear in the solutions list as “ma/ids, rap/ture.”)

DOUBLE-CROSS (8, 5, 4, *9) (*9 = NI2)
With a slim, steely ONE,
The foul deed was done;
The client was given the sack.
From offstage, a noble
Sang “Woman is mobile.”
So-who could FOUR have on his back?
A dread hunch had he
When he felt the sack THREE:
Of what burden was he the carrier?
Gilda set up a din
(TWO had not yet set in)
And bade FOUR farewell with an aria.
=Pen Gwyn

The solution: ONE = stiletto, TWO = rigor, THREE = stir, FOUR = Rigoletto. (This would appear as “sti/letto, rigo/r.”)

The enumeration of all four parts of a double-cross is given.

When composing or solving a double-cross, be careful not to mix up THREE and FOUR: note that ONE and THREE have the same beginning, as do TWO and FOUR.

In a phonetic double-cross, the parts are rearranged phonetically and not by spelling. For example: ONE = Hall of Fame, TWO = gurneys, THREE = Holofernes, FOUR = game.

In a reversed double-cross, after switching the second pieces of ONE and TWO, you reverse the results to get THREE and FOUR. For example: ONE = red rover, TWO = Erebus, THREE = suborder, FOUR = revere. (This would appear as “red ro/ver, Ere/bus.”)

Based on an idea by Stilicho, the double-cross was introduced by Nightowl at the 1980 convention.

 TRANS-CROSS

A trans-cross is similar to a double-cross, but the pieces of the word switch AB, CD, AC, BD. For example: ONE = seal, TWO = rely, THREE = sere, FOUR = ally.

TRANS-CROSS (*3-*5, 6, 8, 6) (TEAS, EH, TEE, ASH)
Sing a song of sixpence, a koan rather wry:
EH of ASH arranged on a Zen master’s pie.
When he saw his pizza had four-and-twenty birds,
He had the TEE assemble, and said some angry words
(In some Tibeto-Burman tongue, or Tai, or TEAS;
They all were South-East Asian-they weren’t Japanese).
“Within this monastery,” he said, and waved his bat,
“‘Make me one with everything’ does not refer to that.”
=Ucaoimhu

The solution: TEAS = Mon-Khmer, EH = oodles, TEE = monkhood, ASH = merles.

The trans-cross was invented by Ucaoimhu.

 CHANGE OF HEART
Two words or phrases are each divided into three pieces; then their middle pieces are switched to form two others.

EXAMPLE: ONE = share, TWO = colt, THREE = sole, FOUR = chart.

CHANGE OF HEART (4 7, *1*1*1, 8, 6)
  (ONE = RH2, 11C-findable; TWO = RH2, 11C-inferable)
The Big Three at Yalta were having a luncheon
When TWO looked as though he’d been hit by a truncheon.
He wrinkled his nose and said, “Open the door!
It smells like there’s something beginning to FOUR.
Was my spinach soufflé left all day in the sun?
Did a skunk wander in? Oh, good lord, it’s the ONE.
Sir, would you please not stand THREE? Go away;
Return to the cellar, and take your . . . bouquet.”
=Lunch Boy

The solution: ONE = wine steward, TWO = FDR, THREE = windward, FOUR = fester. (This would appear in the solution list as “win(e ste)ward, F(D)R”.)

A change of heart is similar to a double-cross, except that the pieces that are switched come from the middles of the ONE and TWO rather than the ends. Note that as in a double-cross, ONE and THREE have the same beginnings, as do TWO and FOUR. (See also the heart transplant.)

The change of heart was invented by Lunch Boy and named by Xemu.

 HEART TRANSPLANT

In a heart transplant, a letter or series of letters is taken from inside one word and transplanted to another. Example: ONE = clear, TWO = wild, THREE = car, FOUR = willed (transplanting the LE).

HEART TRANSPLANT (11, 7, 9, 5 4)
After the ONEing of the voting districts,
   one district suddenly had a surfeit of voters
      who were very fond of plant flats.
That’s
How we ended up with a representative who
   filibusters by yelling things like “This bill
       will have a deleterious effect on the
           TWO, an aromatic herb of the
               carrot family, as well as on the
                   THREE, that member of the
                       mint family with a
                            prominent nose!”
                                Good Lord,
He can really get FOURed.
=Xemu and Lunch Boy

The solution: ONE = gerrymander, TWO = caraway, THREE = germander, FOUR = carry away.

The heart transplant was invented by Xemu.

 DROPOUT

Two words (THREE and FOUR) are joined; then one word (ONE) is dropped out to form another (TWO) from the leftover letters. For example: THREE = reamer, FOUR = itch, ONE = merit, TWO = reach.

DROPOUT (8, 6, 7, 7)
Wolfgang the poet endured his Salieri,
A bitter old green-eyes -- Wolf had to be wary --
Who TWO all his sonnets, each ONE and canzone,
Compared his ballade to a ripe provolone,
Who’d THREE Wolf’s whole gang with improbable rumors
And poison-pen letters that sprouted like tumors.
But Wolfgang the poet showed great perseverance:
FOUR dirt from his drafts, kept a seemly appearance.
Perseverance thus furthers the cause of the poet,
And silly Salieri has just cause to know it.
=Qaqaq and Sibyl

The solution: ONE = rondelet, TWO = envied, THREE = environ, FOUR = deleted. (This would appear as “envi(ron, delet)ed.”)

The enumeration of all four parts must be given.

In a progressive dropout, three or more words or phrases are nested (ONE always innermost) to form two others. For example: ONE = ach, TWO = aviator, THREE = latrine, FOUR = La Traviata, FIVE = chorine. (This would appear as “La Tr[aviat(a, ch)or]ine.”)

The dropout, introduced by Nightowl in 1984, is actually identical to one type of the progressive padlock. But the progressive dropout is unique.