72 entries in Cards / Principles / CATO / Parity
  
Creators Title Comments & References Source Page Categories
Bob Hummer The Stubborn Card No. 46 Scarne on Card Tricks 81
Oscar Weigle Color Scheme No. 47, Cards mixed face up/down, spectator separates face up/down, as well as red/blackVariationsAlso published here Scarne on Card Tricks 83
Bob Hummer, Oscar Weigle Hummer's Reversal Mystery CATO trick, magician can name correctly number of face up cards after cut and turn over procedure. Oscar Weigle variation: colors are also separatedVariations Mathematics, Magic And Mystery 17
Bob Hummer The Little Moonies CATO trick, uses cards with drawing of either smiling/frowning face. Two cards are marked on the back and after mixing, shown to be the only ones frowning while other cards are smilingInspired by Mathematics, Magic And Mystery 19
Bob Hummer, Harry Lorayne Hummer Addition spectator reverses some cards, below table magician reverses more so named total is achieved, as kicker all are one color My Favorite Card Tricks 30
Robert Page All But One CATO red black separation routine, p. 241 for further referenceRelated to The Pallbearers Review Vol. 1-4 (Vol. 3, No. 10) 197
Martin Gardner Paradox Papers paper with numbers in a 4x4 grid is folded into small square, edges cut off, then all even numbers are one way and the odds another, application with cards, Steve Shimm suggestion, tapestry handling, see also p. 521 for Gene Nielson handlingInspired by
  • Henry Dudeny puzzle from "Modern Puzzles" (1926)
Related toVariationsAlso published here
The Pallbearers Review Vol. 5-8 (Vol. 6, No. 9) 429
Charles Hudson Hummer - 4 four cards mixed face up face down by spectator, values of face up cards predicted, CATORelated to Epilogue (Issue 16) 150
Robert E. Neale Number Hummer four cards mixed face up face down by spectator, values of face up cards divined or predictedInspired byRelated to The Pallbearers Review Vol. 5-8 (Vol. 8, No. 4) 600
Oscar Weigle Color Scheme with face-up/face-down mix of twenty cards behind spectator's backRelated toVariationsAlso published here The Pallbearers Review Vol. 9-10 (Vol. 9, No. 6) 724
Karl Fulves Addenda handling variationInspired by The Pallbearers Review Vol. 9-10 (Vol. 9, No. 6) 725
Martin Gardner, Clayton Rawson Further Ideas Inspired by The Pallbearers Review Vol. 9-10 (Vol. 9, No. 6) 726
Karl Fulves Type Casting face-up/face-down prediction of number of cards, weird, CATO relatedRelated to Four Color Problems 23
Karl Fulves Power Play instruction game ten card poker deal Bob Hummer's Collected Secrets 63
Karl Fulves, Bob Hummer Lone Impromptu cards mixed face-up and face-down, performer rightens them behind back except for selectionInspired by Color Quik 29
Bob Hummer Hummer's 18 Card Mystery spectator takes eighteen cards and turns over the top two cards and cuts the pile, that step is repeated as often as he likes, then the performer takes the cards behind his back and divines the amount of reversed cardsRelated toVariations Bob Hummer's Collected Secrets 7
Bob Hummer Hummer's Swindle spectator takes sixteen cards and turns over the top two cards and cuts the pile behind his back, that step is repeated as often as he likes, then the performer takes the cards behind his back and without looking reverses all cards back in order Bob Hummer's Collected Secrets 7
Bob Hummer The Lonely Card CATO routine, cards turned face up, performer takes packet behind back and reverses all cards except selectionRelated toVariations Bob Hummer's Collected Secrets 7
Bob Hummer The Little Moonies CATO routine, cards with moon faces printed on them, one way they are smiling held the other way the are sad, spectator marks two cards on the pack and cuts them in the deck, performer takes cards behind back, all moons are in smiling orientation except marked two Bob Hummer's Collected Secrets 8
Bob Hummer Personality Test face-up/face-down prediction of number of cards, weird, CATO related, personality type presentationRelated to Bob Hummer's Collected Secrets 14
Bob Hummer Politicians Puzzle 6x6 checkerboard, three checkers put on three D's for Democrats or three R's for Republican, spectator can spell a word with the three checkers, moving them for each letter, back is turned and politics can be divined Bob Hummer's Collected Secrets 3
Bob Hummer Mom and Pop Puzzle six checkers on a checkerboard, mom and pop are spelled several times, when performer turns over last spelled word is divinedVariations Bob Hummer's Collected Secrets 34
Charles Hudson Sum Hummer Ace to Ten packet, mixed face up and down by spectator, number of reversed cards and their total predicted, CATO principleVariations Best of Friends 105
Charles Hudson The Royal Computer Kings and Queens are given to spectator for CATO procedure, two card turned over, two previous selectionsVariations Best of Friends 109
Karl Fulves The Dating Game No. 3, spectator turns cards over, at the end only a King-Queen pair is face-upInspired by More Self-Working Card Tricks 4
Karl Fulves Odd Color Out No. 19, cards shuffled face-up/face-down via CATO by spectator, two selections made, performer handles cards and all face-up cards are red with a black selection and vice versaVariations More Self-Working Card Tricks 27
Aldo Colombini Clubbed in one half selection turns over, in other half all cards from the same suit are found reversed The Trapdoor - Volume One (Issue 11) 187
Martin Gardner Paradox Papers No. 9, paper with numbers in a 4x4 grid is folded into small square, edges cut off, then all even numbers are one way and the odds another, application with card values on paper or card layout (chosen card turned over is only odd-colored at the end)Also published here Self-Working Paper Magic 18
Philip T. Goldstein, Robert E. Neale Toddler packet mixed face-up/face-down, values added up is force numberInspired by
  • "Baby Hummer" (Charles Hudson, Linking Ring)
Variations
Fifth 3
Karl Fulves Parity Prophet cards dealt in pairs, one turned over, again dealt in pairs, cards on both side of reversed card are mates or predicted, Gemini Twins relation Rigmarole (Issue 4) 45
Karl Fulves Day One date chosen by choosing some face-up and face-down cards from grid layout, looked up in diary, card noted there predicted, tapestryVariations Crooked Tales 35
Karl Fulves Triumph With Math tapestry layout and foldover Crooked Tales 39
Karl Fulves Foldover Notes Related to Crooked Tales 40
Simon Aronson Moves and Removes marker moved on 3x3 layout, final card predicted, with 4x4 "Sixteen Card Version" on p. 30Related to
  • Martin Gardner Presents (1993), p. 149
Simply Simon 19
Peter Duffie Pasteboard Detection mathematical, CATO Apocalypse Vol. 16-20 (Vol. 19, No. 5) 2645
Peter Duffie Still Scheming Play it Straight Triumph type of effect with CATO procedure, use half a deckInspired by Effortless Card Magic 144
Philip T. Goldstein Paradox Redux "Dot Com - Tricks and stunts with numbers"
tapestry parity principle, credit information, 4x4 number matrix, 19 or 61
Inspired by The Fine Print (Issue 8) 247
Karl Fulves Cut-Rate Hummer "Dot Com - Tricks and stunts with numbers"
twenty cards spread, about five are reversed, spectator remembers one and turns it over, something done behind back by performer, selection located and other reversed cards are now Aces
Variations The Fine Print (Issue 9) 285
David Regal Letter Perfect Spectator mixes stack of alphabet cards face up/down, the face down cards spell his/her name Close-Up & Personal 88
Karl Fulves 37 Threes "Dot Com - Tricks and stunts with numbers"
small packet, spectator cuts and turns over pairs, then two red Threes are only reversed cards, comedy prediction is shown to fit
Related to The Fine Print (Issue 10) 348
Karl Fulves Place The Aces twenty-card packet mixed face-up/face-down, all cards right except Aces Latter Day Secrets (Issue 3) 56
Karl Fulves Hofzinser + Math Aces shuffled reversed into packet, another card chosen, face-up/face-down mix, all cards right except a chosen Ace but selection insteadInspired byRelated to Latter Day Secrets (Issue 3) 55
Karl Fulves Symmetry comment on the Fujiwara effect, two card locationInspired by
  • "Automatic Ace Triumph" (Kuniyasu Fujiwara, Genii, May 2000)
Latter Day Secrets (Issue 3) 56
Harry Lorayne Symbiotic sixteen cards shuffled face-up/face-down, Aces are only cards reversed at the end, faro Personal Collection 493
Karl Fulves Tomorrow's Card No. 47, eight cards shuffled face-up/face-down, number of reversed cards and their identity predictedInspired by
  • "Baby Hummer" (Charles Hudson, Linking Ring)
New Self-Working Card Tricks 67
Karl Fulves, Bob Hummer Psychic Map No. 69, fifteen cards in matrix layout on table, some are turned over, covered with newspaper, performer reaches underneath and adjusts, when newspaper is removed all face-up cards are red and vice versa New Self-Working Card Tricks 104
Harry Lorayne Darn! I Couldn't... four Tens on table, three cards on each, CATO ("leave or reverse"), Aces are only cards reversed cards in the endRelated to
  • "Automatic Ace Triumph" (Kuniyasu Fujiwara, Genii, May 2000)
Variations
Personal Collection 485
Harry Lorayne A Couple of Pages sixteen cards mixed face up and down by spectator, number of reversed cards and their total predictedInspired by Personal Collection 489
Harry Lorayne Spur of the Moment two selections are only reversed cards in packet after CATO procedureInspired by Personal Collection 495
Harry Lorayne Another Moment CATO procedure with twelve-card packet, reversed cards at end are known, or total predicted, or... Personal Collection 499
Reinhard Müller Surprise Ace Triumph Aces shuffled reversed into packet, face-up/face-down mix, all cards right except the QueensInspired by
  • "Automatic Ace Triumph" (Kuniyasu Fujiwara, Genii, May 2000)
Related to
Latter Day Secrets (Issue 5) 139
Karl Fulves The Rule For Red different handling than CATO, switching two cardsInspired by Latter Day Secrets (Issue 7) 262
John Bannon Degrees Of Freedom CATO, Koenig's Tapestry, combo to produce royal flush Dear Mr. Fantasy 128
John Bannon Origami Poker CATO, Koenig's Tapestry, combo to produce royal flush Dear Mr. Fantasy 144
John Bannon Perfect Strangers CATO, Koenig's Tapestry, prediction combo with rainbow packet Dear Mr. Fantasy 155
William Goodwin Postcards Prediction CATO, Koenig's Tapestry, prediction combo with postcards instead of playing cards Dear Mr. Fantasy 158
John Bannon The Works explanation of CATO principle and the Koenig's Tapestry fold (Dudeney Folding)
- First Principles
- Isolating Target Cards
- Rlues Of Engagement
- The Folding Phase
Related to Dear Mr. Fantasy 159
Karl Fulves Pseudo Hummer fooling magicians who know the Hummer CATO trick Combo II 46
Richard Vollmer Sum Hummer Explored packet mixed face up and down by spectator, number of reversed cards and their total predicted, CATO principleInspired byVariations Best of Friends - Volume III 264
Persi Diaconis, Ron Graham Mathematics in the Air Chapter intro that describes the CATO Principle and the mathematics behind it, along with tricksRelated to Magical Mathematics 1
Charles Hudson Baby Hummer Used to demonstrate the CATO principle, uses four cardsRelated to Magical Mathematics 1
Bob Hummer Hummer's Ten Card Mystery Original use of the CATO Principle, based on the 18 Card Mystery in the original manuscript, magician can name how many face up cards there are after mixing it upRelated toAlso published here
  • "18 Card Mystery" (Bob Hummer, Face-up / Face-down Mysteries, 1942)
Magical Mathematics 4
Steve Freeman Royal Hummer Cards are mixed face up and face down haphazardly, later all cards are face down except a royal flushVariations Magical Mathematics 8
Persi Diaconis, Ron Graham Back to Magic End of chapter, describes Steve's own variation on Steve Freeman's handling of Royal HummerInspired by Magical Mathematics 15
Harry Lorayne Try This! mixing procedure for CATO JawDroppers! 198
Unknown MatsuNOma Principle Procedure which allows you to perform the petal force by Mitsunobu Matsuyama without a down-under deal.Related to Semi-Automatic Card Tricks - Volume 9 81
Harry Lorayne The Top-Level Test twenty cards mixed face-up and face-down including a Royal Flush, Royal Flush is only face-up cardsInspired by
  • "Really!" (Harry Lorayne, Lecture Notes)
Related to
JawDroppers! 191
Harry Lorayne Incredible Flush Control diamond Royal Flush mixed in twenty-card packet, CATO procedure, at the end the Royal Flush in Spades is reversedInspired by JawDroppers! 195
Harry Lorayne "That's Impossible!" only four Aces reversed after CATO procedure with sixteen cardsInspired by
  • "Really!" (Harry Lorayne, Lecture Notes)
JawDroppers! Two 176
Harry Lorayne, Richard Vollmer Sum Hummer Explored packet mixed face up and down by spectator, number of reversed cards and their total predicted, CATO principleInspired by JawDroppers! Two 170
Harry Lorayne Three New TOACS TOAC = Turn Over And Cut, all with twelve-card packet
- Prediction
- One To Twelve (named value of a suit only reversed at end)
- Incredible 2-Card Location
JawDroppers! Two 173
Harry Lorayne Eight/Great - Nine/Fine - one of eight-card packet remembered (force), found with CATO
- one of nine-card packet remembered, found with reverse faros
JawDroppers! Two 228