Previous Competition Problems

Here is my archive of previous competition problems.  A problem appearing here has not previously appeared in any book or magazine.  Apart from the first three, a problem is added to this section of my archive as soon as possible after its closing date. Its solution is also added and I don't accept further solutions.  The first three are different, for historical reasons.  Their solutions are not given and you can still have a go at them if you wish to add to your lifetime DD Master Points score.

Here is a list of links to the entire collection so far, in descending numerical order: 

[ Competition #160b ] [ Competition #160a ] [ Competition #159b ] [ Competition #159a ] [ Competition #158b ] [ Competition #158a ] [ Competition #157b ] [ Competition #157a ] [ Competition #156b ] [ Competition #156a ] [ Competition #155b ] [ Competition #155a ] [ Competition #154b ] [ Competition #154a ] [ Competition #153b ] [ Competition #153a ] [ Competition #152b ] [ Competition #152a ] [ Competition #150 ] [ Competition #149b ] [ Competition #149a ] [ Competition #148b ] [ Competition #148a ] [ Competition #147b ] [ Competition #147a ] [ Competition #146b ] [ Competition #146a ] [ Competition #145b ] [ Competition #145a ] [ Competition #144b ] [ Competition #144a ] [ Competition #143b ] [ Competition #143a ] [ Competition #142b ] [ Competition #142a ] [ Competition #140b ] [ Competition #140a ] [ Competition #139b ] [ Competition #139a ] [ Competition #138b ] [ Competition #138a ] [ Competition #137b ] [ Competition #137a ] [ Competition #136b ] [ Competition #136a ] [ Competition #135b ] [ Competition #135a ] [ Competition #134b ] [ Competition #134a ] [ Competition #133b ] [ Competition #133a ] [ Competition #132b ] [ Competition #132a ] [ Competition #131b ] [ Competition #131a ] [ Competition #130c ] [ Competition #130b ] [ Competition #130a ] [ Competition #129b ] [ Competition #129a ] [ Competition #128b ] [ Competition #128a ] [ Competition #127b ] [ Competition #127a ] [ Competition #126b ] [ Competition #126a ] [ Competition #125c ] [ Competition #125b ] [ Competition #125a ] [ Competition #124b ] [ Competition #124a ] [ Competition #123b ] [ Competition #123a ] [ Competition #122b ] [ Competition #122a ] [ Competition #121b ] [ Competition #121a ] [ Competition #120b ] [ Competition #120a ] [ Competition #119b ] [ Competition #119a ] [ Competition #118c ] [ Competition #118b ] [ Competition #118a ] [ Competition #117b ] [ Competition #117a ] [ Competition #116b ] [ Competition #116a ] [ Competition #115b ] [ Competition #115a ] [ Competition #114b ] [ Competition #114a ] [ Competition #113b ] [ Competition #113a ] [ Competition #112b ] [ Competition #112a ] [ Competition #111b ] [ Competition #111a ] [ Competition #110b ] [ Competition #110a ] [ Competition #109b ] [ Competition #109a ] [ Competition #108b ] [ Competition #108a ] [ Competition #107b ] [ Competition #107a ] [ Competition #106b ] [ Competition #106a ] [ Competition #105b ] [ Competition #105a ] [ Competition #104b ] [ Competition #104a ] [ Competition #103b ] [ Competition #103a ] [ Competition #102b ] [ Competition #102a ] [ Competition #101b ] [ Competition #101a ] [ Competition #100b ] [ Competition #100a ] [ Competition #99b ] [ Competition #99a ] [ Competition #98b ] [ Competition #98a ] [ Competition #97b ] [ Competition #97a ] [ Competition #96b ] [ Competition #96a ] [ Competition #95b ] [ Competition #95a ] [ Competition #94b ] [ Competition #94a ] [ Competition #93 ] [ Competition #92 ] [ Competition #91 ] [ Competition #90 ] [ Competition #89 ] [ Competition #88 ] [ Competition #87 ] [ Competition #86 ] [ Competition #85 ] [ Competition #84 ] [ Competition #83 ] [ Competition #82 ] [ Competition #81 ] [ Competition #80 ] [ Competition #79 ] [ Competition #78 ] [ Competition #77 ] [ Competition #76 ] [ Competition #75 ] [ Competition #74 ] [ Competition #73 ] [ Competition #72 ] [ Competition #71 ] [ Competition #70 ] [ Competition #69 ] [ Competition #68 ] [ Competition #67 ] [ Competition #66 ] [ Competition #65 ] [ Competition #64 ] [ Competition #63 ] [ Competition #62 ] [ Competition #61 ] [ Competition #60 ] [ Competition #59 ] [ Competition #58 ] [ Competition #57 ] [ Competition #56 ] [ Competition #55 ] [ Competition #54 ] [ Competition #53 ] [ Competition #52 ] [ Competition #51 ] [ Competition #50 ] [ Competition #49 ] [ Competition #48 ] [ Competition #47 ] [ Competition #46 ] [ Competition #45 ] [ Competition #44 ] [ Competition #43 ] [ Competition #42 ] [ Competition #41 ] [ Competition #40 ] [ Competition #39 ] [ Competition #38 ] [ Competition #37 ] [ Competition #36 ] [ Competition #35 ] [ Competition #34 ] [ Competition #33 ] [ Competition #32 ] [ Competition #31 ] [ Competition #30 ] [ Competition #29 ] [ Competition #28 ] [ Competition #27 ] [ Competition #26 ] [ Competition #25 ] [ Competition #24 ] [ Competition #23 ] [ Competition #22 ] [ Competition #21 ] [ Competition #20 ] [ Competition #19 ] [ Competition #18 ] [ Competition #17 ] [ Competition #16 ] [ Competition #15 ] [ Competition #14 ] [ Competition #13 ] [ Competition #12 ] [ Competition #11 ] [ Competition #10 ] [ Competition #9 ] [ Competition #8 ] [ Competition #7 ] [ Competition #6 ] [ Competition #5 ] [ Competition #4 ] [ Competition #3 ] [ Competition #2 ] [ Competition #1 ]

© Hugh Darwen, 2018

Date last modified: 30 April, 2018