{"format":"murdoku-puzzle/1","id":"lake","version":1,"difficulty":"easy","level":3,"size":{"rows":5,"cols":5},"languages":["en","hu","de","fr","es","it","nl","pl","pt","ro","ca","cs","fi","vi","tr","el","ru","uk","ar","ko","ja","zh-Hans","zh-Hant"],"defaultLanguage":"en","title":"ボート湖","tagline":"ヴィクトリア朝の市立公園 · 1895年7月のある日曜日 · 水上に3艘のボート","author":"mathace","concept":"Murdoku – Manuel Garand (murdoku.com); unofficial fan-made case","created":"2026-09-29","story":"ロンドン、1895年7月の暑い日曜日の午後。市立公園では吹奏楽団が楽器を調律し、3艘の手漕ぎボートが湖面を滑り、バラ園は満開で、カフェテラスでは日陰でレモネードが出されていた。チップを決して渡さないことで知られる銀行家のVyvyanは、新聞を手にテラスのテーブルに腰を下ろしていた。4時に楽団が演奏を始めたとき、彼はそのテーブルの隣で崩れ落ちているのが見つかった。彼の近くにいたのはわずか4人で、それぞれが一文の供述をした――誰が彼と二人きりだったのかを突き止めよう。","rules":{"standard":["どの行にもどの列にも、ちょうど一人がいる。誰かを置いたら、その行と列を丸ごと消そう。","「隣」 = 真左・真右・真上・真下で、かつ同じエリア内。物のあるマス（テーブル、花壇、水、ブイ、噴水）にはいられない。椅子、手漕ぎボート、ベンチにはいられる。","犯人は被害者と二人きりだった：そのエリアには他に誰もいなかった。"],"special":[]},"roleNames":{"visitor":"訪問者","staff":"スタッフ","victim":"被害者"},"personGroups":[{"id":"visitors","name":"訪問者","persons":["A","B","V"]},{"id":"staff","name":"公園のスタッフ","persons":["C","D"]}],"map":{"groups":[],"gaps":[],"areas":[{"id":"Café Terrace","cells":[[1,1],[1,2],[1,3],[2,1],[2,2],[3,1]],"fill":"#f1e3cf","pattern":"tiles","labelAt":[2,2],"name":"カフェテラス"},{"id":"Lake","cells":[[2,3],[2,4],[3,2],[3,3],[3,4],[4,2],[4,3]],"fill":"#cfe3ee","labelAt":[3,3],"name":"湖"},{"id":"Boathouse","cells":[[4,1],[5,1],[5,2]],"fill":"#e2d3b8","pattern":"planks","labelAt":[5,2],"name":"ボートハウス"},{"id":"Rose Garden","cells":[[1,4],[1,5],[2,5],[3,5],[4,4],[4,5],[5,3],[5,4],[5,5]],"fill":"#f3dde3","pattern":"marble","labelAt":[4,4],"name":"バラ園"}],"objectTypes":{"bench":{"occupiable":true,"name":"ベンチ","icon":""},"boat":{"occupiable":true,"name":"手漕ぎボート","icon":""},"chair":{"occupiable":true,"name":"椅子","icon":""},"buoy":{"occupiable":false,"name":"ブイ","icon":""},"flowers":{"occupiable":false,"name":"花壇","icon":""},"fountain":{"occupiable":false,"name":"噴水","icon":""},"table":{"occupiable":false,"name":"テーブル","icon":""},"water":{"occupiable":false,"name":"水","icon":""}},"wallTypes":{},"objects":[{"cell":[1,1],"type":"chair"},{"cell":[1,2],"type":"table"},{"cell":[1,3],"type":"chair"},{"cell":[1,5],"type":"flowers"},{"cell":[2,1],"type":"flowers"},{"cell":[2,3],"type":"water"},{"cell":[2,4],"type":"boat"},{"cell":[3,2],"type":"boat"},{"cell":[3,3],"type":"water"},{"cell":[3,4],"type":"water"},{"cell":[3,5],"type":"bench"},{"cell":[4,1],"type":"chair"},{"cell":[4,2],"type":"water"},{"cell":[4,3],"type":"boat"},{"cell":[5,1],"type":"buoy"},{"cell":[5,4],"type":"fountain"}],"wallFeatures":[],"extras":[],"cellSize":46},"persons":[{"id":"A","name":"Adelaide","gender":"F","role":"visitor","color":"#c62828","avatar":{"bg":"#35607a","skin":"#f6d8c0","hair":"#7a4a2a","style":"bun","shirt":"#2f3b4c","necklace":true},"clue":"彼女は最後の列にいた。","job":"休みの午後を過ごす家庭教師","avatarSvg":"","solverRole":"visitor","constraints":[{"type":"col","cols":[5]}]},{"id":"B","name":"Barnabas","gender":"M","role":"visitor","color":"#2e7d32","avatar":{"bg":"#1b2a33","skin":"#e4b998","hair":"#e8e4dc","style":"short","shirt":"#264653","beard":true,"cap":true},"clue":"彼は手漕ぎボートに座っていた。","job":"引退した船長","avatarSvg":"","solverRole":"visitor","constraints":[{"type":"on","obj":"boat"}]},{"id":"C","name":"Clarissa","gender":"F","role":"staff","color":"#1565c0","avatar":{"bg":"#ad1457","skin":"#f3d3b5","hair":"#d9b464","style":"ponytail","shirt":"#e26d8a","headband":"#f2a53a"},"clue":"彼女は1行目にいた。","job":"公園の入口の花売りの少女","avatarSvg":"","solverRole":"staff","constraints":[{"type":"row","rows":[1]}]},{"id":"D","name":"Dudley","gender":"M","role":"staff","color":"#6a1b9a","avatar":{"bg":"#3f6a3a","skin":"#e7b98f","hair":"#3a2a1c","style":"short","shirt":"#5d4037","mustache":true,"mustacheColor":"#3a2a1c","cap":true},"clue":"彼は花壇の隣にいた。彼はテーブルの隣にはいなかった。","job":"ボート番","avatarSvg":"","solverRole":"staff","constraints":[{"type":"beside","obj":"flowers"},{"type":"not_beside","obj":"table"}]},{"id":"V","name":"Vyvyan","gender":"M","role":"victim","color":"#1b1b1b","avatar":{"bg":"#5a2a2a","skin":"#f1c8a5","hair":"#8a8278","style":"slick","shirt":"#1b1b1b","mustache":true,"mustacheColor":"#8a8278","tophat":"#1b1b1b"},"clue":"被害者。彼はカフェテラスのテーブルの隣で発見された――犯人と二人きりで。","job":"チップを一度も渡さなかった銀行家","avatarSvg":"","solverRole":"visitor","constraints":[{"type":"area","areas":["Café Terrace"]},{"type":"beside","obj":"table"}]}],"victim":"V","murderer":"D","solution":{"C":[1,4],"V":[2,2],"D":[3,1],"B":[4,3],"A":[5,5]},"walkthrough":[{"place":["D"],"cand":{"A":[[2,5],[4,5],[5,5]],"B":[[2,4],[4,3]],"C":[[1,3],[1,4]]},"text":"Dudleyは花壇の隣にいたが、テーブルの隣にはいなかった。花壇はバラ園のR1C5とカフェテラスのR2C1にある。同じエリアでその隣のマスはR1C4、R2C5、R1C1、R2C2、R3C1で、R1C1とR2C2はテーブルの隣でもある。残るのはR1C4、R2C5、R3C1だ。R1C4は1行目にあり、これはClarissaが取れる唯一の行だ。R2C5は最後の列にあり、これはAdelaideが取れる唯一の列だ。したがってDudleyはR3C1にいる。他の誰も3行目や1列目を使えない。"},{"place":["B"],"cand":{"A":[[5,5]],"C":[[1,4]],"V":[[2,2]]},"text":"次に列を見よう。Barnabasはボートの一つ、R2C4かR4C3にいて、ClarissaはR1C3かR1C4にいる――2人で3列目と4列目を埋める。Adelaideが5列目、Dudleyが1列目を持つので、2列目が残る。これは被害者の列でなければならない。空きマスはR2C2とR5C2だ（R1C2はテーブル、R4C2は水、3行目はDudleyのもの）。R5C2では被害者はボートハウスに一人きりだったことになる――ボートハウスの残り2マスはDudleyの列にある――が、犯人は彼と一緒にいた。したがって被害者は2行目にいて、Barnabasはその行を使えない。BarnabasはR4C3のボートにいる。"},{"place":["C","A"],"cand":{"V":[[2,2]]},"text":"3列目は今やBarnabasのものなので、ClarissaはR1C4にいる。2行目と4行目は埋まっているので、AdelaideはR5C5にいる。"},{"final":true,"text":"事件解決：最後の空きマスR2C2は被害者のもの――カフェテラスのテーブルの隣、彼のカードの通りだが、私たちには必要なかった。Vyvyanはそこでボート番と二人きりだった。Dudleyが犯人だ！"}],"solver":{"rules":[],"occupiable":["bench","boat","chair"]},"verification":{"tool":"tools/murdoku_solver.py","unique":true,"guessFree":true,"checked":"2026-09-29"}}