{"format":"murdoku-puzzle/1","id":"smarthome","version":1,"difficulty":"hard","level":7,"size":{"rows":10,"cols":10},"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":"The Smart Home","tagline":"A new villa on the edge of town · the housewarming night · every footstep flipped a light","author":"mathace","concept":"Murdoku – Manuel Garand (murdoku.com); unofficial fan-made case","created":"2026-10-05","story":"Vittoria, an architect, had finally moved into the villa she had designed herself, and every lamp in it obeyed her home-made smart system. On the night of the housewarming party the system went haywire: whenever somebody walked into a room, its light flipped – on if it had been off, off if it had been on. When the evening began every room was empty and dark; later the party scattered through the house, and nobody left a room once they had walked in. Shortly before midnight Vittoria was found dead on the beanbag of the dark Home Cinema. The lamps still remember how many people walked into each room – the shaded rooms on the plan are the ones where the light was off.","rules":{"standard":["Every <b>row</b> and every <b>column</b> holds exactly <b>one person</b>. As soon as you place someone, cross out their whole row and column.","<b>“Beside”</b> = directly left, right, above or below, and <b>in the same area</b>. Squares with objects (the desk, the bookcase, the server, the wardrobe, the dressing table, the shower, the toilet, the coat rack, the mirror, the TV, the projection screen, the projector, the speaker, the piano, plants, the stove, the counter, the sink, the dining table) cannot be occupied; the chairs, the bed, the doormat, the beanbag, the cinema seat, the sofa, the armchair and the stool can. A <b>corner</b> of an area is a square of that area with two outer sides.","Directions refer to rows, not to the same column: <i>“somebody in his area was south of him”</i> = somebody in his area was in a row further down, in any column.","The <b>shaded</b> rooms of the plan were <b>dark</b>; in all the other rooms the light was <b>on</b>.","The murderer was <b>alone with the victim</b>: nobody else was in that area."],"special":["<b>Where the light was on, the number of people was odd; where it was off, it was even or zero.</b>"]},"roleNames":{"family":"family","guest":"guest","victim":"victim"},"personGroups":[{"id":"family","name":"The 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<b>server</b> was somewhere in her <b>column</b>.","job":"Vittoria’s sister","avatarSvg":"<svg viewBox=\"0 0 80 80\" xmlns=\"http://www.w3.org/2000/svg\" role=\"img\" aria-label=\"Adeline\"><rect width=\"80\" height=\"80\" fill=\"#4a3a6a\"/><path d=\"M22 40 Q22 14 40 14 Q58 14 58 40 L58 58 L22 58 Z\" fill=\"#8a5a3a\"/><path d=\"M10 80 Q12 56 40 54 Q68 56 70 80 Z\" fill=\"#c06a8a\"/><rect x=\"34\" y=\"44\" width=\"12\" height=\"13\" fill=\"#f6d8c0\"/><ellipse cx=\"40\" cy=\"34\" rx=\"14\" ry=\"16\" fill=\"#f6d8c0\"/><path d=\"M26 36 Q26 16 40 16 Q54 16 54 36 Q52 24 40 24 Q28 24 26 36 Z\" fill=\"#8a5a3a\"/><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\"/><circle cx=\"26\" cy=\"41\" r=\"1.8\" fill=\"#f0c95a\"/><circle cx=\"54\" cy=\"41\" r=\"1.8\" fill=\"#f0c95a\"/></svg>","solverRole":"family","constraints":[{"type":"col_has","obj":"server"}]},{"id":"B","name":"Benedikt","gender":"M","role":"family","color":"#2e7d32","avatar":{"bg":"#2f4858","skin":"#e7b98f","hair":"#4a3a2a","style":"short","shirt":"#3a5a7a","beard":true},"clue":"He was <b>not</b> in the <b>Bedroom</b>.","job":"Vittoria’s husband","avatarSvg":"<svg viewBox=\"0 0 80 80\" xmlns=\"http://www.w3.org/2000/svg\" role=\"img\" aria-label=\"Benedikt\"><rect width=\"80\" height=\"80\" fill=\"#2f4858\"/><path d=\"M10 80 Q12 56 40 54 Q68 56 70 80 Z\" fill=\"#3a5a7a\"/><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=\"#4a3a2a\"/><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=\"#4a3a2a\"/></svg>","solverRole":"family","constraints":[{"type":"not_area","areas":["Bedroom"]}]},{"id":"C","name":"Camille","gender":"F","role":"family","color":"#1565c0","avatar":{"bg":"#6e2c4b","skin":"#f0cdb0","hair":"#2a1c14","style":"long","shirt":"#e0b050","headband":"#3f8a4a"},"clue":"She was the <b>only woman</b> beside the <b>dining table</b>.","job":"Vittoria’s daughter","avatarSvg":"<svg viewBox=\"0 0 80 80\" xmlns=\"http://www.w3.org/2000/svg\" role=\"img\" aria-label=\"Camille\"><rect width=\"80\" height=\"80\" fill=\"#6e2c4b\"/><path d=\"M22 42 Q20 14 40 14 Q60 14 58 42 L62 72 L18 72 Z\" fill=\"#2a1c14\"/><path d=\"M10 80 Q12 56 40 54 Q68 56 70 80 Z\" fill=\"#e0b050\"/><rect x=\"34\" y=\"44\" width=\"12\" height=\"13\" fill=\"#f0cdb0\"/><ellipse cx=\"40\" cy=\"34\" rx=\"14\" ry=\"16\" fill=\"#f0cdb0\"/><path d=\"M26 36 Q26 16 40 16 Q54 16 54 36 Q52 24 40 24 Q28 24 26 36 Z\" fill=\"#2a1c14\"/><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=\"#3f8a4a\"/></svg>","solverRole":"family","constraints":[{"type":"only_beside","obj":"table","gender":"F"}]},{"id":"D","name":"Darius","gender":"M","role":"family","color":"#6a1b9a","avatar":{"bg":"#1b2a33","skin":"#c98d62","hair":"#1c1a1a","style":"slick","shirt":"#4a6a3a","glasses":true},"clue":"The <b>bed</b> was somewhere in his area.","job":"Vittoria’s son","avatarSvg":"<svg viewBox=\"0 0 80 80\" xmlns=\"http://www.w3.org/2000/svg\" role=\"img\" aria-label=\"Darius\"><rect width=\"80\" height=\"80\" fill=\"#1b2a33\"/><path d=\"M10 80 Q12 56 40 54 Q68 56 70 80 Z\" fill=\"#4a6a3a\"/><rect x=\"34\" y=\"44\" width=\"12\" height=\"13\" fill=\"#c98d62\"/><ellipse cx=\"40\" cy=\"34\" rx=\"14\" ry=\"16\" fill=\"#c98d62\"/><path d=\"M26 30 Q27 16 44 15 Q56 15 55 26 Q48 22 40 23 Q30 24 26 30 Z\" fill=\"#1c1a1a\"/><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\"/><circle cx=\"34\" cy=\"35\" r=\"5\" fill=\"none\" stroke=\"#2b2b2b\" stroke-width=\"1.4\"/><circle cx=\"46\" cy=\"35\" r=\"5\" fill=\"none\" stroke=\"#2b2b2b\" stroke-width=\"1.4\"/><line x1=\"39\" y1=\"35\" x2=\"41\" y2=\"35\" stroke=\"#2b2b2b\" stroke-width=\"1.4\"/></svg>","solverRole":"family","constraints":[{"type":"area_has","obj":"bed"}]},{"id":"E","name":"Emeric","gender":"M","role":"guest","color":"#e65100","avatar":{"bg":"#3d5a6e","skin":"#e4b998","hair":"#6b4a2f","style":"short","shirt":"#e6a23a","cap":true,"mustache":true,"mustacheColor":"#6b4a2f"},"clue":"Somebody else in his area was beside a <b>chair</b>. A <b>plant</b> was somewhere in his <b>row</b>.","job":"the electrician who wired the house","avatarSvg":"<svg viewBox=\"0 0 80 80\" xmlns=\"http://www.w3.org/2000/svg\" role=\"img\" aria-label=\"Emeric\"><rect width=\"80\" height=\"80\" fill=\"#3d5a6e\"/><path d=\"M10 80 Q12 56 40 54 Q68 56 70 80 Z\" fill=\"#e6a23a\"/><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=\"#6b4a2f\"/><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=\"#6b4a2f\"/><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":"guest","constraints":[{"type":"with_beside","obj":"chair"},{"type":"row_has","obj":"plant"}]},{"id":"F","name":"Fletcher","gender":"M","role":"guest","color":"#00838f","avatar":{"bg":"#35607a","skin":"#f1c8a5","hair":"#b7482c","style":"short","shirt":"#2a2a3a","glasses":true,"beard":true},"clue":"The <b>bookcase</b> was somewhere in his <b>row</b>.","job":"the programmer of the smart system","avatarSvg":"<svg viewBox=\"0 0 80 80\" xmlns=\"http://www.w3.org/2000/svg\" role=\"img\" aria-label=\"Fletcher\"><rect width=\"80\" height=\"80\" fill=\"#35607a\"/><path d=\"M10 80 Q12 56 40 54 Q68 56 70 80 Z\" fill=\"#2a2a3a\"/><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 32 Q26 15 40 15 Q54 15 54 32 Q50 24 40 24 Q30 24 26 32 Z\" fill=\"#b7482c\"/><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\"/><circle cx=\"34\" cy=\"35\" r=\"5\" fill=\"none\" stroke=\"#2b2b2b\" stroke-width=\"1.4\"/><circle cx=\"46\" cy=\"35\" r=\"5\" fill=\"none\" stroke=\"#2b2b2b\" stroke-width=\"1.4\"/><line x1=\"39\" y1=\"35\" x2=\"41\" y2=\"35\" stroke=\"#2b2b2b\" 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=\"#b7482c\"/></svg>","solverRole":"guest","constraints":[{"type":"row_has","obj":"bookcase"}]},{"id":"G","name":"Gilda","gender":"F","role":"guest","color":"#ad1457","avatar":{"bg":"#8c3a5a","skin":"#f6d8c0","hair":"#c9c3b8","style":"bun","shirt":"#7a5a9a","scarf":"#f2a53a"},"clue":"There was a <b>man</b> in her area. She was <b>not</b> in a corner of her area.","job":"the neighbour","avatarSvg":"<svg viewBox=\"0 0 80 80\" xmlns=\"http://www.w3.org/2000/svg\" role=\"img\" aria-label=\"Gilda\"><rect width=\"80\" height=\"80\" fill=\"#8c3a5a\"/><path d=\"M10 80 Q12 56 40 54 Q68 56 70 80 Z\" fill=\"#7a5a9a\"/><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=\"#c9c3b8\"/><path d=\"M26 32 Q26 16 40 16 Q54 16 54 32 Q50 24 40 24 Q30 24 26 32 Z\" fill=\"#c9c3b8\"/><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=\"M30 58 Q40 70 50 58 L48 66 Q40 76 32 66 Z\" fill=\"#f2a53a\"/></svg>","solverRole":"guest","constraints":[{"type":"with_gender","gender":"M"},{"type":"not_corner_of_area"}]},{"id":"H","name":"Horace","gender":"M","role":"guest","color":"#5d4037","avatar":{"bg":"#5a2a2a","skin":"#e7b98f","hair":"#8a8278","style":"bald","shirt":"#1b2a4a","mustache":true,"mustacheColor":"#8a8278"},"clue":"Somebody in his area was <b>south</b> of him.","job":"the property developer","avatarSvg":"<svg viewBox=\"0 0 80 80\" xmlns=\"http://www.w3.org/2000/svg\" role=\"img\" aria-label=\"Horace\"><rect width=\"80\" height=\"80\" fill=\"#5a2a2a\"/><path d=\"M10 80 Q12 56 40 54 Q68 56 70 80 Z\" fill=\"#1b2a4a\"/><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 30 Q26 22 30 20 L30 34 Q26 34 26 30 Z\" fill=\"#8a8278\"/><path d=\"M54 30 Q54 22 50 20 L50 34 Q54 34 54 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\"/></svg>","solverRole":"guest","constraints":[{"type":"someone_dir_same_area","dir":"S"}]},{"id":"I","name":"Irene","gender":"F","role":"guest","color":"#558b2f","avatar":{"bg":"#5b2c6f","skin":"#f0cdb0","hair":"#d9b464","style":"ponytail","shirt":"#2f8a8a","necklace":true},"clue":"She was <b>with Fletcher</b>. She was beside a <b>chair</b>.","job":"the interior designer","avatarSvg":"<svg viewBox=\"0 0 80 80\" xmlns=\"http://www.w3.org/2000/svg\" role=\"img\" aria-label=\"Irene\"><rect width=\"80\" height=\"80\" fill=\"#5b2c6f\"/><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=\"#2f8a8a\"/><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=\"#f0cdb0\"/><ellipse cx=\"40\" cy=\"34\" rx=\"14\" ry=\"16\" fill=\"#f0cdb0\"/><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\"/></svg>","solverRole":"guest","constraints":[{"type":"with","q":"F"},{"type":"beside","obj":"chair"}]},{"id":"V","name":"Vittoria","gender":"F","role":"victim","color":"#1b1b1b","avatar":{"bg":"#2a2a2a","skin":"#f1c8a5","hair":"#1c1a1a","style":"bob","shirt":"#b71c1c","earrings":true},"clue":"<b>The victim.</b> She was found in the <b>Home Cinema</b>, sitting on the <b>beanbag</b> – alone with the murderer.","job":"the architect of the villa","avatarSvg":"<svg viewBox=\"0 0 80 80\" xmlns=\"http://www.w3.org/2000/svg\" role=\"img\" aria-label=\"Vittoria\"><rect width=\"80\" height=\"80\" fill=\"#2a2a2a\"/><path d=\"M22 40 Q22 14 40 14 Q58 14 58 40 L58 58 L22 58 Z\" fill=\"#1c1a1a\"/><path d=\"M10 80 Q12 56 40 54 Q68 56 70 80 Z\" fill=\"#b71c1c\"/><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 36 Q26 16 40 16 Q54 16 54 36 Q52 24 40 24 Q28 24 26 36 Z\" fill=\"#1c1a1a\"/><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\"/><circle cx=\"26\" cy=\"41\" r=\"1.8\" fill=\"#f0c95a\"/><circle cx=\"54\" cy=\"41\" r=\"1.8\" fill=\"#f0c95a\"/><path d=\"M12 12 L68 68 M68 12 L12 68\" stroke=\"#e0362e\" stroke-width=\"5\" stroke-linecap=\"round\" opacity=\".9\"/></svg>","solverRole":"family","constraints":[{"type":"area","areas":["Home Cinema"]},{"type":"on","obj":"beanbag"}]}],"victim":"V","murderer":"H","solution":{"A":[7,1],"B":[6,4],"C":[8,10],"D":[2,5],"E":[10,9],"F":[1,3],"G":[9,7],"H":[4,6],"I":[3,2],"V":[5,8]},"walkthrough":[{"place":["V","F","I"],"cand":{"A":[[6,1],[7,1],[9,1]]},"text":"Vittoria was found on the beanbag in the Home Cinema: <b>Vittoria is at R5C8</b>, and the murderer was alone with her there. The server stands at R3C1, so column 1 is Adeline’s; the bookcase stands at R1C4, so row 1 is Fletcher’s – he is in the Study, the Bedroom or the Bathroom. Irene was with Fletcher and beside a chair. The chairs stand at R2C2 in the Study and at R8C8 and R9C10 in the Dining Room, and Fletcher cannot be in the Dining Room – so both of them are in the Study. Fletcher’s squares there in row 1 are R1C1 and R1C3, and column 1 is Adeline’s: <b>Fletcher is at R1C3</b>. Irene’s squares beside the chair are R2C1 (column 1), R2C3 (column 3) and R3C2: <b>Irene is at R3C2</b>. The Study is shaded – dark – so the number of people in it is even; its free squares lie in three rows only, so it cannot hold four: <b>Fletcher and Irene are alone in the Study</b>. Adeline, in column 1, is left with R6C1 in the Living Room and R7C1 and R9C1 in the Kitchen."},{"place":[],"cand":{"A":[[6,1],[7,1],[9,1]],"C":[[7,9],[8,10],[9,10],[10,9]],"E":[[6,9],[10,7],[10,9],[10,10]]},"text":"Now the lights. Camille was beside the dining table (R8C9–R9C9), so she is in the Dining Room. Emeric had a plant in his row – row 6 or row 10 – and somebody else in his area was beside a chair. The only rooms with chairs are the Study and the Dining Room, and the Study lies in rows 1–3: Emeric is in the Dining Room too, at R6C9, R10C7, R10C9 or R10C10 (R10C8 is in Vittoria’s column). So the Dining Room holds at least two people, and it is lit – its number is odd: <b>exactly three people were in the Dining Room</b>. Now count. Every lit room holds an odd number of people, so at least one: the Living Room, the Kitchen and the Bedroom at least one each, the Dining Room three; the dark Study holds two and the dark Home Cinema two – Vittoria and the murderer. That is 1 + 1 + 1 + 3 + 2 + 2 = 10, the whole party. So every room holds exactly that many: <b>one person each in the Living Room, the Kitchen and the Bedroom, and nobody in the Hallway or the Bathroom</b>."},{"place":[],"cand":{"A":[[6,1],[7,1],[9,1]],"C":[[7,9],[8,10],[9,10],[10,9]],"E":[[6,9],[10,7],[10,9],[10,10]],"D":[[2,4],[2,5]],"G":[[6,9],[7,9],[7,10],[8,7],[8,10],[9,7],[9,10],[10,7],[10,9],[10,10]]},"text":"Darius had the bed in his area: <b>Darius is the one person in the Bedroom</b>. Gilda had a man in her area. Alone in the Living Room or the Kitchen she would have nobody, and in the Home Cinema her only companion would be Vittoria – so <b>Gilda is the third person in the Dining Room</b>, with Camille and Emeric. Benedikt and Horace are left: one of them is the murderer in the Home Cinema, the other the one person of the Living Room or the Kitchen – whichever Adeline is not in. The three Dining Room people need three columns of the room, and column 8 is Vittoria’s, so <b>columns 7, 9 and 10 belong to the Dining Room</b>. Row 4 needs somebody as well: R4C1 is the TV, R4C2 is in Irene’s column, R4C3–R4C5 lie in the empty Hallway, R4C7 is a Dining Room column, R4C9 is the projection screen, and R4C10 lies in the empty Bathroom. Only R4C6 remains: <b>the murderer is at R4C6</b>, in the Home Cinema. Column 6 is the murderer’s, so Darius – in row 2 of the Bedroom, outside columns 6, 7 and 8 – is at R2C4 or R2C5."},{"place":["C","G"],"cand":{"A":[[6,1],[7,1]],"E":[[6,9],[10,9]],"D":[[2,4],[2,5]]},"text":"The Dining Room. Gilda was not in a corner of her area, and she was not beside the dining table – Camille was the only woman there. Of the Dining Room squares in columns 7, 9 and 10, R6C9, R8C7, R10C7 and R10C10 are corners, and R7C9, R8C10, R9C10 and R10C9 touch the dining table: Gilda is at R7C10 or R9C7. Somebody else in Emeric’s area was beside a chair – Camille or Gilda. In columns 7, 9 and 10 the squares beside a chair are R8C7, R8C10 and R10C10; Gilda has none of them, and of Camille’s squares beside the dining table only R8C10 is one of them: <b>Camille is at R8C10</b>. Column 10 is hers, so <b>Gilda is at R9C7</b>. Emeric is left with R6C9 and R10C9, Adeline with R6C1 and R7C1."},{"place":["A","E","D"],"cand":{"B":[[4,6],[6,4]],"H":[[4,6],[6,4]]},"text":"Columns 1, 2, 3, 6, 7, 8, 9 and 10 belong to Adeline, Irene, Fletcher, the murderer, Gilda, Vittoria, Emeric and Camille, so Darius and the one person of the Living Room or the Kitchen share columns 4 and 5. Rows 8 and 9 are Camille’s and Gilda’s, so that person is at R6C4, R7C4 or R7C5 in the Living Room, or at R10C4 or R10C5 in the Kitchen. <b>Could Adeline be at R6C1</b>, in the Living Room? Then the other person is in the Kitchen, in row 10 – and Emeric, out of row 6, would need row 10 too (R10C9). Two people in one row: impossible. So <b>Adeline is at R7C1</b>, in the Kitchen, and the Living Room’s one person, out of row 7, is at R6C4. Row 6 is taken, so <b>Emeric is at R10C9</b>; column 4 is taken, so <b>Darius is at R2C5</b>."},{"place":["H","B"],"text":"The murderer at R4C6 and the man at R6C4 are Benedikt and Horace, in some order. <b>Could Benedikt be the murderer?</b> Then Horace is the only person in the Living Room, and nobody in his area can be south of him – but Horace said somebody was. So <b>Horace is at R4C6</b>, with Vittoria south of him in the Home Cinema, and <b>Benedikt is at R6C4</b>, alone in the lit Living Room – not in the Bedroom, just as he said. Everyone is placed."},{"final":true,"text":"Case closed: Vittoria was alone in her dark Home Cinema with the property developer. <b>Horace is the murderer!</b>"}],"solver":{"rules":[{"type":"area_count_parity","areas":["Living Room","Kitchen","Dining Room","Bedroom"],"parity":"odd"},{"type":"area_count_parity","areas":["Hallway","Study","Bathroom","Home Cinema"],"parity":"even"}],"occupiable":["chair","bed","doormat","beanbag","seat","sofa","armchair","stool"]},"verification":{"tool":"tools/murdoku_solver.py","unique":true,"guessFree":true,"checked":"2026-10-05"}}