{"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":"El llac de les barques","tagline":"Un parc victorià de la ciutat · un diumenge de juliol de 1895 · tres barques a l’aigua","author":"mathace","concept":"Murdoku – Manuel Garand (murdoku.com); unofficial fan-made case","created":"2026-09-29","story":"Londres, una calorosa tarda de diumenge de juliol de 1895. Al parc de la ciutat la banda de música afinava els instruments, tres barques de rems lliscaven pel llac, el jardí de roses era en plena floració i la terrassa del cafè servia llimonada a l’ombra. Vyvyan, un banquer conegut per no deixar mai propina, s’havia assegut amb el diari a la taula de la terrassa. Quan la banda va començar a tocar a les quatre, el van trobar desplomat al costat d’aquella taula. Només quatre persones havien estat a prop seu, i cadascuna va fer una declaració d’una sola frase: esbrina qui era sol amb ell.","rules":{"standard":["Cada <b>fila</b> i cada <b>columna</b> conté exactament <b>una persona</b>. Tan bon punt col·loquis algú, ratlla tota la seva fila i la seva columna.","<b>«Al costat»</b> = directament a l’esquerra, a la dreta, a sobre o a sota, i <b>a la mateixa zona</b>. Les caselles amb objectes (la taula, els parterres de flors, l’aigua, la boia i la font) no es poden ocupar; les cadires, les barques de rems i el banc sí.","L’assassí estava <b>sol amb la víctima</b>: ningú més era en aquella zona."],"special":[]},"roleNames":{"visitor":"visitant","staff":"personal","victim":"víctima"},"personGroups":[{"id":"visitors","name":"Visitants","persons":["A","B","V"]},{"id":"staff","name":"El personal del parc","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":"Terrassa del Cafè"},{"id":"Lake","cells":[[2,3],[2,4],[3,2],[3,3],[3,4],[4,2],[4,3]],"fill":"#cfe3ee","labelAt":[3,3],"name":"Llac"},{"id":"Boathouse","cells":[[4,1],[5,1],[5,2]],"fill":"#e2d3b8","pattern":"planks","labelAt":[5,2],"name":"Cobert de barques"},{"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":"Jardí de Roses"}],"objectTypes":{"bench":{"occupiable":true,"name":"banc","icon":"<rect x=\"7\" y=\"8\" width=\"3.2\" height=\"31\" fill=\"#5e4127\"/><rect x=\"35.8\" y=\"8\" width=\"3.2\" height=\"31\" fill=\"#5e4127\"/><rect x=\"4\" y=\"8\" width=\"38\" height=\"6\" rx=\"1.5\" fill=\"#a5733f\" stroke=\"#4e3a1e\" stroke-width=\"1.3\"/><rect x=\"4\" y=\"17.5\" width=\"38\" height=\"6\" rx=\"1.5\" fill=\"#c08a50\" stroke=\"#6b4a26\" stroke-width=\"1.2\"/><rect x=\"4\" y=\"25\" width=\"38\" height=\"6\" rx=\"1.5\" fill=\"#c08a50\" stroke=\"#6b4a26\" stroke-width=\"1.2\"/><rect x=\"4\" y=\"32.5\" width=\"38\" height=\"6\" rx=\"1.5\" fill=\"#c08a50\" stroke=\"#6b4a26\" stroke-width=\"1.2\"/>"},"boat":{"occupiable":true,"name":"barca de rems","icon":"<path d=\"M5 25 q18 13 36 0 l-3 -9 h-30 z\" fill=\"#8a5a34\" stroke=\"#3f2d1d\" stroke-width=\"1.4\"/><rect x=\"12\" y=\"10\" width=\"22\" height=\"6\" rx=\"2\" fill=\"#d9d5cc\" stroke=\"#8c8a82\"/><rect x=\"21\" y=\"1\" width=\"4\" height=\"9\" fill=\"#3f2d1d\"/><path d=\"M5 25 q18 5 36 0\" fill=\"none\" stroke=\"#3f2d1d\" stroke-width=\"1\"/>"},"chair":{"occupiable":true,"name":"cadira","icon":"<rect x=\"9\" y=\"7\" width=\"28\" height=\"32\" rx=\"6\" fill=\"#fbfaf6\" stroke=\"#8c8a82\" stroke-width=\"1.5\"/><rect x=\"9\" y=\"7\" width=\"28\" height=\"9\" rx=\"4\" fill=\"#d9d5cc\" stroke=\"#8c8a82\" stroke-width=\"1.5\"/>"},"buoy":{"occupiable":false,"name":"boia","icon":"<ellipse cx=\"23\" cy=\"38\" rx=\"14\" ry=\"4\" fill=\"#ffffff\" opacity=\".6\"/><path d=\"M12 36 q1 -14 11 -18 q10 4 11 18 z\" fill=\"#e0362e\" stroke=\"#7a1f1c\" stroke-width=\"1.2\"/><rect x=\"21\" y=\"6\" width=\"3\" height=\"14\" fill=\"#444\"/><path d=\"M24 6 h14 l-14 9 z\" fill=\"#e0362e\"/><path d=\"M24 6 h14 l-14 9 z\" fill=\"none\" stroke=\"#fff\" stroke-width=\"1\"/><line x1=\"24\" y1=\"6\" x2=\"38\" y2=\"15\" stroke=\"#fff\" stroke-width=\"2\"/>"},"flowers":{"occupiable":false,"name":"parterre de flors","icon":"<path d=\"M17 28 h12 l-2 12 h-8 z\" fill=\"#c9c3b8\" stroke=\"#6b6660\" stroke-width=\"1.2\"/><circle cx=\"16\" cy=\"19\" r=\"5\" fill=\"#e0526a\"/><circle cx=\"30\" cy=\"19\" r=\"5\" fill=\"#f2a53a\"/><circle cx=\"23\" cy=\"12\" r=\"5\" fill=\"#f2d24a\"/><circle cx=\"23\" cy=\"22\" r=\"4.5\" fill=\"#d94a8a\"/><path d=\"M12 25 q6 -8 11 -6\" fill=\"none\" stroke=\"#3f8a4a\" stroke-width=\"2\"/><path d=\"M34 25 q-6 -8 -11 -6\" fill=\"none\" stroke=\"#3f8a4a\" stroke-width=\"2\"/>"},"fountain":{"occupiable":false,"name":"font","icon":"<ellipse cx=\"23\" cy=\"33\" rx=\"18\" ry=\"8\" fill=\"#9fd3ea\" stroke=\"#4a7c95\" stroke-width=\"1.5\"/><rect x=\"19\" y=\"14\" width=\"8\" height=\"18\" fill=\"#b9b6ae\" stroke=\"#5b5852\"/><ellipse cx=\"23\" cy=\"14\" rx=\"10\" ry=\"4\" fill=\"#9fd3ea\" stroke=\"#4a7c95\"/><path d=\"M23 4 q-6 6 -4 10 M23 4 q6 6 4 10\" fill=\"none\" stroke=\"#7fb8d0\" stroke-width=\"2\"/>"},"table":{"occupiable":false,"name":"taula","icon":"<rect x=\"7\" y=\"7\" width=\"32\" height=\"32\" rx=\"5\" fill=\"#b98a5a\" stroke=\"#6e4d2c\" stroke-width=\"1.5\"/><rect x=\"12\" y=\"12\" width=\"22\" height=\"22\" rx=\"3\" fill=\"#d1a675\"/>"},"water":{"occupiable":false,"name":"aigua","icon":"<rect x=\"0\" y=\"0\" width=\"46\" height=\"46\" fill=\"#3f7d9c\"/><path d=\"M-2 12 q6 -5 12 0 t12 0 t12 0 t12 0 M-2 24 q6 -5 12 0 t12 0 t12 0 t12 0 M-2 36 q6 -5 12 0 t12 0 t12 0 t12 0\" fill=\"none\" stroke=\"#2b5e79\" stroke-width=\"3.2\"/><path d=\"M-2 15 q6 -5 12 0 t12 0 t12 0 t12 0 M-2 27 q6 -5 12 0 t12 0 t12 0 t12 0 M-2 39 q6 -5 12 0 t12 0 t12 0 t12 0\" fill=\"none\" stroke=\"rgba(255,255,255,.42)\" stroke-width=\"1.5\"/>"}},"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":"Estava a l’<b>última columna</b>.","job":"una institutriu en la seva tarda lliure","avatarSvg":"<svg viewBox=\"0 0 80 80\" xmlns=\"http://www.w3.org/2000/svg\" role=\"img\" aria-label=\"Adelaide\"><rect width=\"80\" height=\"80\" fill=\"#35607a\"/><path d=\"M10 80 Q12 56 40 54 Q68 56 70 80 Z\" fill=\"#2f3b4c\"/><path d=\"M31 58 Q40 66 49 58\" fill=\"none\" stroke=\"#f3e2b3\" stroke-width=\"2\" stroke-dasharray=\"2 2\"/><rect x=\"34\" y=\"44\" width=\"12\" height=\"13\" fill=\"#f6d8c0\"/><ellipse cx=\"40\" cy=\"34\" rx=\"14\" ry=\"16\" fill=\"#f6d8c0\"/><circle cx=\"40\" cy=\"15\" r=\"7\" fill=\"#7a4a2a\"/><path d=\"M26 32 Q26 16 40 16 Q54 16 54 32 Q50 24 40 24 Q30 24 26 32 Z\" fill=\"#7a4a2a\"/><circle cx=\"34\" cy=\"35\" r=\"1.6\" fill=\"#2b2b2b\"/><circle cx=\"46\" cy=\"35\" r=\"1.6\" fill=\"#2b2b2b\"/><path d=\"M36 43 Q40 46 44 43\" fill=\"none\" stroke=\"#a5735a\" stroke-width=\"1.4\"/></svg>","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":"Estava assegut en una <b>barca de rems</b>.","job":"un capità de vaixell jubilat","avatarSvg":"<svg viewBox=\"0 0 80 80\" xmlns=\"http://www.w3.org/2000/svg\" role=\"img\" aria-label=\"Barnabas\"><rect width=\"80\" height=\"80\" fill=\"#1b2a33\"/><path d=\"M10 80 Q12 56 40 54 Q68 56 70 80 Z\" fill=\"#264653\"/><rect x=\"34\" y=\"44\" width=\"12\" height=\"13\" fill=\"#e4b998\"/><ellipse cx=\"40\" cy=\"34\" rx=\"14\" ry=\"16\" fill=\"#e4b998\"/><path d=\"M26 32 Q26 15 40 15 Q54 15 54 32 Q50 24 40 24 Q30 24 26 32 Z\" fill=\"#e8e4dc\"/><circle cx=\"34\" cy=\"35\" r=\"1.6\" fill=\"#2b2b2b\"/><circle cx=\"46\" cy=\"35\" r=\"1.6\" fill=\"#2b2b2b\"/><path d=\"M36 43 Q40 46 44 43\" fill=\"none\" stroke=\"#a5735a\" stroke-width=\"1.4\"/><path d=\"M27 38 Q30 52 40 53 Q50 52 53 38 Q50 47 40 48 Q30 47 27 38 Z\" fill=\"#e8e4dc\"/><path d=\"M24 24 Q24 11 40 11 Q56 11 56 24 Z\" fill=\"#22406f\"/><rect x=\"22\" y=\"22\" width=\"36\" height=\"5\" rx=\"2\" fill=\"#12213a\"/><circle cx=\"40\" cy=\"18\" r=\"2.6\" fill=\"#f0b429\"/></svg>","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":"Estava a la <b>primera fila</b>.","job":"la florista de la porta del parc","avatarSvg":"<svg viewBox=\"0 0 80 80\" xmlns=\"http://www.w3.org/2000/svg\" role=\"img\" aria-label=\"Clarissa\"><rect width=\"80\" height=\"80\" fill=\"#ad1457\"/><path d=\"M50 30 Q64 34 60 62 L54 62 Q56 40 48 36 Z\" fill=\"#d9b464\"/><path d=\"M10 80 Q12 56 40 54 Q68 56 70 80 Z\" fill=\"#e26d8a\"/><rect x=\"34\" y=\"44\" width=\"12\" height=\"13\" fill=\"#f3d3b5\"/><ellipse cx=\"40\" cy=\"34\" rx=\"14\" ry=\"16\" fill=\"#f3d3b5\"/><path d=\"M26 33 Q26 16 40 16 Q54 16 54 33 Q50 24 40 24 Q30 24 26 33 Z\" fill=\"#d9b464\"/><circle cx=\"34\" cy=\"35\" r=\"1.6\" fill=\"#2b2b2b\"/><circle cx=\"46\" cy=\"35\" r=\"1.6\" fill=\"#2b2b2b\"/><path d=\"M36 43 Q40 46 44 43\" fill=\"none\" stroke=\"#a5735a\" stroke-width=\"1.4\"/><rect x=\"26\" y=\"23\" width=\"28\" height=\"5\" rx=\"2\" fill=\"#f2a53a\"/></svg>","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":"Estava al costat d’un <b>parterre de flors</b>. <b>No</b> estava al costat de la <b>taula</b>.","job":"el guarda de les barques","avatarSvg":"<svg viewBox=\"0 0 80 80\" xmlns=\"http://www.w3.org/2000/svg\" role=\"img\" aria-label=\"Dudley\"><rect width=\"80\" height=\"80\" fill=\"#3f6a3a\"/><path d=\"M10 80 Q12 56 40 54 Q68 56 70 80 Z\" fill=\"#5d4037\"/><rect x=\"34\" y=\"44\" width=\"12\" height=\"13\" fill=\"#e7b98f\"/><ellipse cx=\"40\" cy=\"34\" rx=\"14\" ry=\"16\" fill=\"#e7b98f\"/><path d=\"M26 32 Q26 15 40 15 Q54 15 54 32 Q50 24 40 24 Q30 24 26 32 Z\" fill=\"#3a2a1c\"/><circle cx=\"34\" cy=\"35\" r=\"1.6\" fill=\"#2b2b2b\"/><circle cx=\"46\" cy=\"35\" r=\"1.6\" fill=\"#2b2b2b\"/><path d=\"M36 43 Q40 46 44 43\" fill=\"none\" stroke=\"#a5735a\" stroke-width=\"1.4\"/><path d=\"M33 41 Q40 37 47 41 Q40 43 33 41 Z\" fill=\"#3a2a1c\"/><path d=\"M24 24 Q24 11 40 11 Q56 11 56 24 Z\" fill=\"#22406f\"/><rect x=\"22\" y=\"22\" width=\"36\" height=\"5\" rx=\"2\" fill=\"#12213a\"/><circle cx=\"40\" cy=\"18\" r=\"2.6\" fill=\"#f0b429\"/></svg>","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":"<b>La víctima.</b> El van trobar a la <b>Terrassa del Cafè</b>, al costat de la <b>taula</b> – sol amb l’assassí.","job":"un banquer que mai no deixava propina","avatarSvg":"<svg viewBox=\"0 0 80 80\" xmlns=\"http://www.w3.org/2000/svg\" role=\"img\" aria-label=\"Vyvyan\"><rect width=\"80\" height=\"80\" fill=\"#5a2a2a\"/><path d=\"M10 80 Q12 56 40 54 Q68 56 70 80 Z\" fill=\"#1b1b1b\"/><rect x=\"34\" y=\"44\" width=\"12\" height=\"13\" fill=\"#f1c8a5\"/><ellipse cx=\"40\" cy=\"34\" rx=\"14\" ry=\"16\" fill=\"#f1c8a5\"/><path d=\"M26 30 Q27 16 44 15 Q56 15 55 26 Q48 22 40 23 Q30 24 26 30 Z\" fill=\"#8a8278\"/><circle cx=\"34\" cy=\"35\" r=\"1.6\" fill=\"#2b2b2b\"/><circle cx=\"46\" cy=\"35\" r=\"1.6\" fill=\"#2b2b2b\"/><path d=\"M36 43 Q40 46 44 43\" fill=\"none\" stroke=\"#a5735a\" stroke-width=\"1.4\"/><path d=\"M33 41 Q40 37 47 41 Q40 43 33 41 Z\" fill=\"#8a8278\"/><rect x=\"26\" y=\"0\" width=\"28\" height=\"26\" rx=\"2\" fill=\"#1b1b1b\"/><rect x=\"19\" y=\"24\" width=\"42\" height=\"6\" rx=\"3\" fill=\"#1b1b1b\" stroke=\"rgba(0,0,0,.25)\"/><rect x=\"26\" y=\"19\" width=\"28\" height=\"5\" fill=\"#c9a03a\"/><path d=\"M12 12 L68 68 M68 12 L12 68\" stroke=\"#e0362e\" stroke-width=\"5\" stroke-linecap=\"round\" opacity=\".9\"/></svg>","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 estava al costat d’un parterre de flors, però no al costat de la taula. Els parterres de flors són a R1C5, al Jardí de Roses, i a R2C1, a la Terrassa del Cafè; les caselles del costat a la mateixa zona són R1C4, R2C5, R1C1, R2C2 i R3C1 – i R1C1 i R2C2 també són al costat de la taula. Queden R1C4, R2C5 i R3C1. R1C4 és a la primera fila, l’única fila que pot tenir Clarissa; R2C5 és a l’última columna, l’única columna que pot tenir Adelaide. Per tant, <b>Dudley és a R3C1</b>, i ningú més pot fer servir la fila 3 ni la columna 1."},{"place":["B"],"cand":{"A":[[5,5]],"C":[[1,4]],"V":[[2,2]]},"text":"Ara mira les columnes. Barnabas és en una de les seves barques, a R2C4 o a R4C3, i Clarissa és a R1C3 o a R1C4 – entre tots dos omplen les columnes 3 i 4. Adelaide té la columna 5 i Dudley la columna 1, així que sobra la columna 2: ha de ser la de la víctima. Les seves caselles lliures són R2C2 i R5C2 (R1C2 és la taula, R4C2 és aigua, la fila 3 és de Dudley). A R5C2 la víctima hauria estat sola al Cobert de barques – les altres dues caselles del cobert són a la columna de Dudley –, però l’assassí era amb ella. Per tant, la víctima és a la fila 2, i Barnabas no la pot fer servir: <b>Barnabas és a la barca de R4C3</b>."},{"place":["C","A"],"cand":{"V":[[2,2]]},"text":"La columna 3 és ara de Barnabas, així que <b>Clarissa és a R1C4</b>. Les files 2 i 4 estan ocupades, així que <b>Adelaide és a R5C5</b>."},{"final":true,"text":"Cas tancat: l’última casella lliure, R2C2, és de la víctima – a la Terrassa del Cafè, al costat de la taula, tal com diu la seva carta, encara que mai no ens va fer falta. Vyvyan hi era sol amb el guarda de les barques. <b>Dudley és l’assassí!</b>"}],"solver":{"rules":[],"occupiable":["bench","boat","chair"]},"verification":{"tool":"tools/murdoku_solver.py","unique":true,"guessFree":true,"checked":"2026-09-29"}}