Notable Enigmas

This page lists puzzles that I have found particularly interesting to work out a programmed solution for:

Challenging Puzzles

These puzzles provided a good programming challenge:

• Enigma 1712: Each digit twice (see also Enigma 1536, Enigma 1518)
• Enigma 1700: Polymagic
• Enigma 1669: Coloured bricks
• Enigma 1661: Latin art
• Enigma 1653: Cut-free
• Enigma 1602: Miscount
• Enigma 1592: Seeing spots
• Enigma 1589: Coin-cidence
• Enigma 1536: List of primes
• Enigma 1532: Just reflecting
• Enigma 1520: Just pondering
• Enigma 1519: Dominotrix
• Enigma 1516: A colourful turn
• Enigma 1511: Way out
• Enigma 1505: Brief N-counter
• Enigma 1501: Five sets at Wimbledon
• Enigma 1499: Not quite right
• Enigma 1491: Tile trials
• Enigma 1475: Lines of thought
• Enigma 1446: Double entendre
• Enigma 1356: Magic spot
• Enigma 1335: I know where you live!
• Enigma 1112: Patio zones
• Enigma 1066: Members of the clubs
• Enigma 1050: Find the link
• Enigma 1035: Connected numbers
• Enigma 1018: Half-time
• Enigma 1003: Dicey names
• Enigma 999: Combined celebrations
• Enigma 988: Cards high and low
• Enigma 975: Ant goes for a walk
• Enigma 973: Choss, anyone?
• Enigma 957: Open the box!
• Enigma 955: Puzzle yourself
• Enigma 950: Turning, turning
• Enigma 937: Progressive football
• Enigma 891: Mock examinations
• Enigma 852: Sheep pens
• …
• Enigma 595a: Christmas message
• Enigma 572: A deal of thought
• Enigma 544a: Merry Christmas
• Enigma 543: Spires point the way
• Enigma 493b: Christmas cards
• Enigma 493a: Little donkey
• Enigma 460: Tear me off a strip
• Enigma 442a: Hark the herald angels sing
• Enigma 362: On the face of it
• Enigma 325: Clear thin circuit (see also Enigma 329)
• Enigma 288a: Multiplets
• Enigma 287: GAGA’s friends
• Enigma 170: Mini-multicolour
• Enigma 166: Water storage
• Enigma 135: Funny ending
• Enigma 128: All the junctions
• Enigma 112: Two-square dissection
• Enigma 108: Longest journey
• Enigma 96: Different differences
• Enigma 82: Quad-spoiling
• Enigma 70: Find the catch
• Enigma 58: Octos (see also Enigma 86)
• Enigma 54: Grid halving
• Enigma 45: Six squares – harder (see also Enigma 40)
• Enigma 37: Blocked
• Enigma 17: Squares in rectangles
• Enigma 12: Cubic walks
• Enigma 10: Squared near-squares

::

Not Solved Programatically

These are puzzles that I have not solved using a program:

• Enigma 1632: Foiled by a fold
• Enigma 1595: All mapped out
• Enigma 1546: Mini-tangram
• Enigma 1528: Ad hoctagon
• Enigma 1521: Boat scenes
• Enigma 1393: More haste less seed
• Enigma 1318: Extended horizons
• Enigma 1250: Sheng-phooey
• Enigma 1177: Photocopy
• Enigma 1172: Plant a tree
• Enigma 1167: Christmas lines
• Enigma 1165: Bull’s-eye
• Enigma 1131: Numbers in boxes
• Enigma 1039: Mirror, mirror
• Enigma 1038: The running track
• Enigma 1032: Colonial powers
• Enigma 1028: A perfect pass
• Enigma 959: Christmas greetings
• Enigma 949: Farm land
• Enigma 932: Empty plates
• Enigma 919: Very acute
• Enigma 894: Deltoids
• Enigma 868: Colour the triangle
• Enigma 850: Swapping the letters
• Enigma 833: Equal shares
• …
• Enigma 658: The secret base
• Enigma 623: The engineer’s dilemma
• Enigma 613: Series of paintings
• Enigma 605: Singular singles
• Enigma 562: The frozen river
• Enigma 554: Pure magic
• Enigma 198: No stopping
• Enigma 162: Quoit utilities
• Enigma 148: I spy
• Enigma 140: Muddy fields
• Enigma 121: Sunday stroll
• Enigma 92: Toffee for three

::

Partial Programmatic Solutions

These are puzzles that are partially solved programmatically, but I haven’t found a satisfactory programmatic solution:

• Enigma 1665: Football league
• Enigma 1622: Chances for a business meeting
• Enigma 1376: Square facts and faces
• Enigma 1251: Jigsaw of rectangles
• Enigma 1248: Rows and columns
• Enigma 1218: Discerning the truth
• Enigma 1095: Changing fortunes
• …
• Enigma 610: Uncommon cars
• Enigma 170: Mini-multicolour
• Enigma 136: Twelve-point square
• Enigma 112: Two-square dissection
• Enigma 54: Grid halving

::

Advertisement