Sudoku Advent: Y-Sums
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Sudoku Advent 2025 (16) – Y-Sums (met hints) Online versie (zonder hints)
5 hours ago
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Drawing Hands
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XV Pairs Sudoku by Philip Newman - (This post is part of the Genuinely Approachable Sudoku (GAS) series.) Three more numbers (13, 14, 15) are here in this Advent Calendar edition of XV Pai...20 hours ago
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Shogun # 13 - When you put eleven Sudoku puzzles together, you get a Shogun. The three Sudoku puzzles in the center share four regions (3x3 boxes) with four other Sudo...3 days ago
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Wordy Wednesday 678: Letravex 4 - WORDY WEDNESDAY #676 SUDOKUROSTIC 10 (answer) Here is the answer to this puzzle. If you still wish to solve it yourself, please go here for the normal vers...5 days ago
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2025 Thailand Sudoku Championship Recap - The 2025 Thailand Sudoku Championship was lit because we ran it. After securing the rights to host next year’s Asian Sudoku Championship, we felt that runn...1 week ago
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2025駒場祭の配布冊子・解答を公開します - 2025年11月22日、23日、24日に開催された2025年度駒場祭で、本同好会が配布したパズル冊子の問題・解答データを公開します。オンラインで気軽にパズルを解いていただけるよう、一部のパズルでは問題画像に「ぱずぷれ」「puzz.link」「penpa-edit」へのリンクをつけております。問題の不備や間違い等見...3 weeks ago
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WSPC 2025 in Ungarn - Vorletzte Woche fand in Eger in Ungarn die WSPC 2025 statt. Bei den Sudokus hat Tantan Dai aus China vor Kota Morinishi (Japan) und Yuxuan Hu (China) gewon...2 months ago
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Bonus Puzzles from the UKSC - So the 2025 UKSC has been and gone. Here are a couple of variations of puzzles that appeared on the contest, created by removing some given digits and cag...5 months ago
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#995: Puzzler Pride 2025 - Happy Pride 2025! Today Jamie Hargrove and I are pleased to present another showcase of puzzles from LGBTQIA+ authors from the puzzle community. This year ...6 months ago
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Puzzle No. 522: Birthday Puzzle (Sudoku)! - Oh oops, I’m back on here. I posted last year’s birthday puzzle over on LMI Expo, but that meant I couldn’t share it out to non-puzzle friends to try. So t...9 months ago
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migrating blog platforms is my hobby - I alluded to the WordPress drama in the post that most recently revived this blog. It does not appear to have stopped, and today I saw this Onion-esque hea...11 months ago
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Z pionkiem - W majowym „Świecie nauki” jest drobny, ale niefortunny i dość istotny błąd, na który zwrócił uwagę w komentarzach jeden z czytelników. Chodzi oczywiście o ...1 year ago
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Regional Yajilin (06-01-2023) - This puzzle might be 2… also driving is fun (surprisingly) Regional Yajilin: https://puzz.link/p?yajilin-regions/8/8/25raipkldq40co87tgru11j022g22g2g22 years ago
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Puzzle #236: Nonconsecutive Cipher Fillomino - This is a Nonconsecutive Cipher Fillomino. The rules for Fillomino can be found here: Rules page In addition to the usual rules for Fillomino, adjacent reg...2 years ago
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Puzzle No 173: Yajilin - While doing the Yajilin Yacht Contest on Logic Masters India, I got this idea. Yajilin Yacht is a ongoing Daily Puzzle Series contest by IHNN (Jeffrey Ba...3 years ago
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【重要】移転と、閉鎖のお知らせ - 移転先はこちら！ 【はしたかの新ブログ】 ーーーーーーーーーーーーーーーーーーーーー "ニコリパズル道場！"の読者の皆様 いつもお世話になっております。はしたかです。 さて、早速本題ですが、このブログがお借りしているteacup様のサーバーが閉鎖することとなりました。 これに伴い、本ブログも数ヶ月後に消滅いた...3 years ago
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东京奥运会38金 - 祝贺中国奥运选手在2020年东京奥运会上取得38金，创境外参赛最佳！ 【堡垒数独】 规则：将1～9填入空格内，使每行、每列、每宫内均无重复数。红格内的数字大于相邻白格内的数字。4 years ago
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Puzzle 203: Slitherlink [just one segment] - It’s always fun to figure out some new arguments in a puzzle type. While going through @taburega’s tough puzzles, I ran into one occurrence of a pattern I ...5 years ago
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13 May, 2020 - We have uploaded a mirror archive of the now defunct CiSRA Puzzle Competition website. This was a puzzle comp that we organised from 2007 to 2013. The orig...5 years ago
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P.I.HUNT 6 in a month! - Hey there, Is it Valentine’s Day already? We’re getting EXTRA CLOSE TO NEW PI. There’s only a month until the 6th P.I. Hunt! Solve the anagram to learn wha...5 years ago
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Puzzle #14 - This is a Double Choco puzzle. I can't be bothered to write rules pages for every single genre that I come across any more, so the rules are below. Diffi...5 years ago
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Puzzle 45: Masyu - An explanation of the rules for Masyu puzzles is here. I’m starting to remember what makes for an aesthetic distribution of circles.5 years ago
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Happy 2020 Puzzle - Here’s a new Sudoku for the year 2020. Instead of filling in cells with the numbers 1 through 9, we use the characters in “HAPPY2020”. This means we have...5 years ago
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Sudokumaniacs YouTube Channel - Hello friends, We wish to announce that we have started our own YouTube channel. We will be explaining the basic and advanced solving techniques in the in...6 years ago
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さしがね 19 - どうも久しぶりです。USBeです。わけあってこんなド深夜(AM3:53現在)に筆を執っています。変なテンションのため文章が荒れるかもしれませんが、昼すぎに素面で読み返して問題ない限りそのままでいきます。 さて、今回久しぶりにこのブログの記事更新をしたわけですが、それはペンシルパズルアドベントカレンダー201...6 years ago
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Puzzle #25 – Doppelblock (USPC ’19) - Theme: Today’s Puzzle Standard Doppelblock rules. Hi all, I’m just writing to share the news that one of my puzzles was featured on this year’s US Puzzle C...6 years ago
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ナゾ057 時とともに変わるもの - ～今回のナゾ～答えが分かったらここから送信※今回は、【ひらがな】で答えてください。※解答締切は“5/11 （土） PM 11:00”～前回の問題の答え～ 正方形を彩る色を文字におこし 共通して現れる文字を抜き出すと 右辺の言葉が現れる。 よって、 「あか」「あお」に共通する「あ」 「きいろ」「むらさき」に共通...6 years ago
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パズル投稿サイトについての妄想諸々 - このサイトが名の通り「パズルに関する備忘録」になってしばらく経ちます。当ブログのこのスタンスはこれからも続くでしょう。パズルの方は現在(Twitter)にて毎日正午に出題しておりますので宜しければ。最近はYahooジオシティーズの終了に伴い旧サイトが消滅するため問題のバックアップ作業をやっておりました。そのついで...6 years ago
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World Puzzle Championship Puzzles - Round 12 - The last set of puzzles are from round 12. This was the innovative round. There were a few types in there that were interesting to write. My favourite two ...7 years ago
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Twitterにポイポイしたやつのまとめ - 全く更新してませんでした。ごめんなさい。 といいつつもパズル自体は不定期で気が向いた時に作っており、Twitterに投げたりはしてました。いいね等でのレスポンスが早いし、Tumblrより気軽に上げやすいからついついそっちに上げてしまうんですよね。あと、一時期に関しては 某診断メーカーの影響もあるかも。 そ...7 years ago
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Balgam, Ankara’da bir semt? - *Aris ve Efe için Kendi hâlinde biriyim, öyle herhangi bir şeyde muhteşem değilim… Hani tasvir ederler ya, sıradan, ortalama biri, işte öyleyim. Düzenli bi...7 years ago
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【重要】今後について - はてなダイアリーが２０１９年春にサービスを終了することが発表されました。そのため、９月頃からはてなブログに移動することにしました。パズルの問題はこれまで通りペンパ置き場で、それ以外は新ブログ（準備中）での更新になります。なお、ダイアリーでの記事は移行せず7 years ago
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Calendar Lineup – June 2018 - [image: Beach and pier.] The upcoming puzzle events, puzzle hunts, puzzle tournaments, and featured new releases for the puzzle community from June 2018. ...7 years ago
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Omni-Yajilin - My first Nikoli puzzle book was Pencil Puzzle Yajilin 1, back in 2006 when the Pencil Puzzle series was available. Yajilin has always been a special puzzl...7 years ago
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Too Lazy with a Blog - Apparently I’m too lazy to keep up with the blog format. I do write some puzzles occasionally, but I mostly share them with the Discord server I’m in, Puzz...8 years ago
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That’s all, Folks - No posts for a month and a half? It’s become obvious to me that despite the fact there’s plenty to talk about, I’ve rather lost interest in saying it in th...8 years ago
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Puzzle 26: Falling Letters - Rules (from the WPC 2017 instruction booklet): “Place letters into some cells in the grid. Same letters cannot share a side, and blank cells cannot share a...8 years ago
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Not something that's not about hats - Not gonna talk about that! Instead, let's go into unnecessary detail to solve a hat puzzle. Back in March, I saw a video featuring two puzzles about prison...9 years ago
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11e Championnats du Monde de Sudoku et 25e Championnats du Monde de Jeux de Logique - À l'adresse des personnes peu familières de la langue anglaise, un compte-rendu en français agrémenté de nombreuses photos est disponible sur le site htt...9 years ago
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Killer sudoku N°14 - Voici le 500ème puzzle publié sur ce blog ! Ce sudoku est également le dernier qui sera publié ici. J'espère que vous, chers lecteurs, avez apprécié et ...9 years ago
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Neue Rätsel auf www.janko.at - Es gibt neue Rätsel: Aisuban: 21–30 [von Iwa Daigeki] Corral: 171–180 Curving Road: 31–40 Galaxien: 421–430 Knossos: 151–160 Kurotto: 91–100 Nanbaboru: 1...9 years ago
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(29.–36.) Star Battle - Hello again! It’s been brought to my attention that it is yet again time to post something on this blog. To apologise for keeping quiet, here’s a slew of S...9 years ago
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SVC (snake variant contest ) - SVC (snake variant contest ) authored by me on LMI for the first time 🙂 http://logicmastersindia.com/2015/SVC/10 years ago
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10 September, 2015 - CiSRA has decided not to run the CiSRA Puzzle Competition any more. We thank you for your participation over the years, and hope that you had as much fun a...10 years ago
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USPC 2015 is over - I haven’t found much discussion online; maybe it’s on sites like Facebook where I’m not present, so let’s dump some thoughts here. Tentatively, I finished,...10 years ago
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Sudoku Grand Prix 2015: UK Round! - The eighth and final round of the Sudoku Grand Prix is coming this weekend, from July 17-20. Those interested in competing for the World Sudoku Championshi...10 years ago
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Puzzle 68: The One Ring - See Puzzle 3 for *most* of the instructions. I've added two additional elements here (and I lack the time to properly update the full rules to include the...10 years ago
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第4届甜菜杯数独谜题邀请赛即将开始 - 去年成功举办了第3届甜菜杯之后，今年一直有爱好者关注第4届甜菜杯什么时候举行，我和廖然也多次讨论今年是否举办。最终我们决定在年底前举办第4届甜菜杯。跟去年一样，廖然负责数独组的题目，我负责谜题组的题目。为了不跟大学生数独赛时间冲突，这次甜菜杯线下赛时间确定为12月27-28日。 今年的甜菜杯谜题组如何出题，让...10 years ago
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Holiday Discount Puzzle 2014 - Fifth Annual Holiday Discount Puzzle Solve this puzzle for 10% off any order! December is here once again, and that can mean only one thing: it's time agai...11 years ago
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ブログを移転します。 - 突然ですが、ブログを移転します。１０月１日からの新しいブログはこちらです。今まで使っていたFC2ブログの投稿画面になぜか不具合が生じてしまいました。非常に使いづらくなって困ったので移転することにしました。面倒をかけて申し訳ありませんが、もし、お気に入りやリンクに登録してくれていた方がいらっしゃいましたら、新しいブ...11 years ago
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nr. 940 - Daily League Sudoku - Even Group-Inequility Sudoku - I like the sudokus where you have to mark the odd-even cells. Such as Mathrax or yesterday Odd-Even Count Sudoku by Prasanna Seshadri. Here is another this ...11 years ago
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An End... and a Beginning - I will keep this blog open as an archive. I thank all readers and friends for making this blog a success (according to me!). After a long break, I'll be b...11 years ago
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Conceptis「最も難しい加算パズル」を解いてみた(5・完) - Conceptis「最も難しい加算パズル」を解いてみた(1) Conceptis「最も難しい加算パズル」を解いてみた(2) Conceptis「最も難しい加算パズル」を解いてみた(3) Conceptis「最も難しい加算パズル」を解いてみた(4) 今回で最終回です。 (9) 中央部...11 years ago
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年賀パズル2014 - Happy new year!!I look forward to your continued good will in the coming year!!I had no time to make this puzzle. However,I think that this shakashaka puzz...11 years ago
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2013年 振り返り。 - おはようございます、こんにちは、こんばんは。ちみかなです。 2013年も残り1時間を切りました。今年はどうしようかと思いましたが、 一応慣習ですので、振り返ってみたいと思います。 ○仕事 今年は一年ずっと鳥取で仕事をしました。デスマーチと呼ぶレベルではないのでしょうが、 それなりに頑張ったように思います。...11 years ago
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WPC Playoops - So a tremendous WPC has ended. I simply wish my performance in the end lived up to my own expectations in the way that the quality of the puzzles and organ...12 years ago
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Puzzle 16: BACA - Been a while. This one's pretty easy, but I was inspired by a puzzle on GM Puzzles yesterday. Rules (as swiped from GM Puzzles): Either shade or add a sin...12 years ago
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Dominoes 1 - I wish I had a way to link to an Excel spreadsheet in this blog, but I don't see one. Guess you'll just have to print this one out.12 years ago
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121212 - 今日は2012年12月12日で12が3つの日だ。というわけで昨年に引き続き12が3つへやわけ。サイズも12x12。ぱずぷれv3ちょっと難しくなりすぎたかな。13 years ago
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会誌のデータをあげました - お久しぶりです。wingです。前回の更新が4/22だったので約半年ぶりですね。更新放置しててすみませんでした。m(__)m多分もう更新することはほとんどないと思いますが・・・さて、要望があったので今年の文化祭で配布した会誌のデータをアップします。いろいろと訂正すべき点がまだまだありますがあしからず・・・感想等...13 years ago
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Fillomino Cipher - This is a Cipher Fillomino Puzzle. Rules are at http://logicmastersindia.com/lmitests/dl.asp?view=1&attachmentid=282 (Hopefully, as indicated in the puzzle...13 years ago
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Les îles elles-mêmes finissent par sombrer - C'est officiel ; il m'est définitivement plus plaisant de repartir de zéro que de corriger encore et toujours un travail n'ayant pas l'heur de me satisfair...13 years ago
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Doppelblock - Fill in the grid with the numbers 1 to 4. In each row and each column is each number exactly once. There are also in each row and column two blackened ce...15 years ago
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Nurimino (Nurikabe Fillomino) - *Nurimino*: Here's another hybrid puzzle. In a sense, each solution is both a valid Nurikabe and a valid Fillomino solution. All given numbers clues in ...16 years ago
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■ - ※※※※※宣伝※※※※※開発をサポートしたPlayStation Mobile「不思議の国のラビリンス」がリリースされました。 http://www.4gamer.net/games/999/G999903/20130607053/遊んでね！56 years ago
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All blog content by Αντώνης Λαλάτσας. All blog content is released under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported license.
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