{"format":"murdoku-puzzle/1","id":"maths-lesson","version":1,"difficulty":"easy","level":3,"size":{"rows":8,"cols":8},"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":"La clase de mates","tagline":"Un colegio de primaria · jornada de puertas abiertas · el inspector nunca escribió su informe","author":"mathace","concept":"Murdoku – Manuel Garand (murdoku.com); unofficial fan-made case","created":"2026-10-08","story":"Era la jornada de puertas abiertas en el colegio de la calle Hársfa: los padres podían asistir a cualquier clase, y este año hasta vino el inspector escolar. Viktor tenía una libreta llena de observaciones y fama de ponerle pegas a todo – el triángulo de tiza en la pizarra, las colchonetas gastadas, el café de la sala de profesores. Cuando sonó el timbre al final del recreo largo, el inspector no apareció en la tercera clase: lo encontraron muerto en la sala de profesores. Tres padres y cuatro miembros del personal del colegio seguían en el edificio, y a cada uno le preguntaron dónde había estado.","rules":{"standard":["Cada <b>fila</b> y cada <b>columna</b> contiene exactamente <b>una persona</b>. En cuanto coloques a alguien, tacha toda su fila y su columna.","<b>«Junto a»</b> = directamente a la izquierda, a la derecha, arriba o abajo, y <b>en la misma zona</b>. Las casillas con objetos (la pizarra, las taquillas, los escritorios, las estanterías, la planta, la cafetera exprés, el trofeo, la mesa, la cesta de balones y el muro de escalada) no se pueden ocupar; las sillas, el sillón, los bancos, las colchonetas y el sofá sí.","El asesino estaba <b>a solas con la víctima</b>: nadie más se encontraba en esa zona."],"special":[]},"roleNames":{"parent":"padre o madre","staff":"miembro del personal","inspector":"inspector escolar","victim":"víctima"},"personGroups":[{"id":"parents","name":"Padres","persons":["A","B","C"]},{"id":"school","name":"Personal del colegio","persons":["D","E","F","I"]},{"id":"inspector","name":"El inspector","persons":["V"]}],"map":{"groups":[],"gaps":[],"areas":[{"id":"Maths Classroom","cells":[[1,1],[1,2],[1,3],[1,4],[1,5],[2,1],[2,2],[2,3],[2,4],[2,5],[3,1],[3,2],[3,3],[3,4],[4,2],[4,3]],"fill":"#efe2cb","pattern":"planks","labelAt":[3,2],"name":"Aula de 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en la <b>última fila</b>.","job":"padre de un alumno de cuarto","avatarSvg":"<svg viewBox=\"0 0 80 80\" xmlns=\"http://www.w3.org/2000/svg\" role=\"img\" aria-label=\"Attila\"><rect width=\"80\" height=\"80\" fill=\"#35607a\"/><path d=\"M10 80 Q12 56 40 54 Q68 56 70 80 Z\" fill=\"#2f3b4c\"/><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=\"#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=\"M27 38 Q30 52 40 53 Q50 52 53 38 Q50 47 40 48 Q30 47 27 38 Z\" 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fill=\"#f0cdb0\"/><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\"/><path d=\"M30 58 Q40 70 50 58 L48 66 Q40 76 32 66 Z\" fill=\"#e0b050\"/></svg>","solverRole":"staff","constraints":[{"type":"only_beside","obj":"bench"}]},{"id":"F","name":"Feri","gender":"M","role":"staff","color":"#00838f","avatar":{"bg":"#2e5a3a","skin":"#e7b98f","hair":"#3a2a1c","style":"short","shirt":"#c62828","mustache":true,"mustacheColor":"#3a2a1c","whistle":true},"clue":"Era el <b>único</b> sentado en una <b>silla</b>.","job":"profesor de educación física","avatarSvg":"<svg viewBox=\"0 0 80 80\" xmlns=\"http://www.w3.org/2000/svg\" role=\"img\" aria-label=\"Feri\"><rect width=\"80\" height=\"80\" fill=\"#2e5a3a\"/><path d=\"M10 80 Q12 56 40 54 Q68 56 70 80 Z\" fill=\"#c62828\"/><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=\"M33 56 Q40 68 47 56\" fill=\"none\" stroke=\"#c9302c\" stroke-width=\"1.6\"/><rect x=\"37\" y=\"66\" width=\"7\" height=\"5\" rx=\"1.5\" fill=\"#e0b040\" stroke=\"#7a5a12\" stroke-width=\".8\"/></svg>","solverRole":"staff","constraints":[{"type":"only_on","obj":"chair"}]},{"id":"I","name":"Ildikó","gender":"F","role":"staff","color":"#ad1457","avatar":{"bg":"#e65100","skin":"#f6d8c0","hair":"#b7482c","style":"bun","shirt":"#f2a53a","glasses":true,"necklace":true},"clue":"Era la <b>única mujer</b> junto a la <b>pizarra</b>.","job":"profesora de matemáticas","avatarSvg":"<svg viewBox=\"0 0 80 80\" xmlns=\"http://www.w3.org/2000/svg\" role=\"img\" aria-label=\"Ildikó\"><rect width=\"80\" height=\"80\" fill=\"#e65100\"/><path d=\"M10 80 Q12 56 40 54 Q68 56 70 80 Z\" fill=\"#f2a53a\"/><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=\"#b7482c\"/><path d=\"M26 32 Q26 16 40 16 Q54 16 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\"/></svg>","solverRole":"staff","constraints":[{"type":"only_beside","obj":"blackboard","gender":"F"}]},{"id":"V","name":"Viktor","gender":"M","role":"victim","color":"#1b1b1b","avatar":{"bg":"#5a2a2a","skin":"#f1c8a5","hair":"#d9d4cc","style":"bald","shirt":"#2f3b4c","glasses":true,"mustache":true,"mustacheColor":"#d9d4cc"},"clue":"<b>La víctima.</b> Lo encontraron en la <b>Sala de profesores</b> – a solas con el asesino.","job":"inspector escolar","avatarSvg":"<svg viewBox=\"0 0 80 80\" xmlns=\"http://www.w3.org/2000/svg\" role=\"img\" aria-label=\"Viktor\"><rect width=\"80\" height=\"80\" fill=\"#5a2a2a\"/><path d=\"M10 80 Q12 56 40 54 Q68 56 70 80 Z\" fill=\"#2f3b4c\"/><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 Q26 22 30 20 L30 34 Q26 34 26 30 Z\" fill=\"#d9d4cc\"/><path d=\"M54 30 Q54 22 50 20 L50 34 Q54 34 54 30 Z\" fill=\"#d9d4cc\"/><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=\"M33 41 Q40 37 47 41 Q40 43 33 41 Z\" fill=\"#d9d4cc\"/><path d=\"M12 12 L68 68 M68 12 L12 68\" stroke=\"#e0362e\" stroke-width=\"5\" stroke-linecap=\"round\" opacity=\".9\"/></svg>","solverRole":"inspector","constraints":[{"type":"area","areas":["Staff Room"]}]}],"victim":"V","murderer":"F","solution":{"I":[1,1],"D":[2,7],"C":[3,4],"E":[4,6],"B":[5,8],"F":[6,3],"V":[7,2],"A":[8,5]},"walkthrough":[{"place":["D"],"cand":{"A":[[8,1],[8,2],[8,3],[8,5],[8,6]],"B":[[3,4],[3,8],[4,2],[5,3],[5,4],[5,6],[5,8],[7,4],[8,1],[8,5]],"C":[[3,4]],"E":[[3,5],[4,4],[4,6],[5,5],[6,4],[7,5]],"F":[[4,3],[6,1],[6,3]],"I":[[1,1],[1,4]],"V":[[5,1],[5,2],[5,3],[7,1],[7,2],[7,3],[8,1],[8,2],[8,3]]},"text":"Ildikó era la única mujer junto a la pizarra (R1C2–R1C3). Las casillas libres junto a esta son R1C1, R1C4 y R2C2 – pero R2C2 es una silla, y solo Feri estaba sentado en una silla. Así que Ildikó está en R1C1 o en R1C4: la fila 1 es suya. Dávid tenía la cesta de balones (R6C7) en su columna, así que la columna 7 es suya, y había un escritorio en su zona. Hay escritorios en el Aula de mates y en la Dirección, y la columna 7 solo pasa por una de esas zonas, la Dirección, en R1C7 y R2C7. La fila 1 es de Ildikó: <b>Dávid está en R2C7</b>, en el sillón."},{"place":["C","I"],"cand":{"A":[[8,2],[8,3],[8,5],[8,6]],"B":[[4,2],[5,3],[5,6],[5,8],[8,5]],"E":[[4,6],[5,5],[7,5]],"F":[[4,3],[6,3]],"V":[[5,2],[5,3],[7,2],[7,3],[8,2],[8,3]]},"text":"Csilla estaba junto a un escritorio, pero no junto a una estantería. Los escritorios están en R1C8, R2C3 y R3C3, y las casillas libres junto a ellos son R1C7 y R2C8 (Dirección) y R2C2, R2C4, R3C2, R3C4 y R4C3 (Aula de mates). R2C2 y R4C3 son sillas (solo Feri estaba sentado en una silla), R3C2 está junto a la estantería (R3C1), R1C7 está en la columna de Dávid, y R2C4 y R2C8 están en su fila: <b>Csilla está en R3C4.</b> La columna 4 es ahora suya, así que Ildikó no puede estar en R1C4: <b>Ildikó está en R1C1.</b>"},{"place":["B"],"cand":{"A":[[8,2],[8,3],[8,5],[8,6]],"E":[[4,6],[7,5]],"F":[[4,3],[6,3]],"V":[[7,2],[7,3],[8,2],[8,3]]},"text":"Las filas 1, 2 y 3 y las columnas 1, 4 y 7 están ocupadas. Cada columna contiene a alguien – ¿quién puede estar en la columna 8? R4C8 es el trofeo y R8C8 el muro de escalada, así que solo quedan R5C8, R6C8 y R7C8, todas en el Gimnasio. Attila estaba en la fila 8, Viktor en la Sala de profesores, Feri en una silla y Eszter junto a un banco – ninguna de esas casillas les sirve. Así que la columna 8 es de Bori. Estaba en una esquina de su zona, y de las tres casillas solo R5C8 es una esquina del Gimnasio: <b>Bori está en R5C8.</b>"},{"place":["F"],"cand":{"A":[[8,2],[8,5],[8,6]],"E":[[4,6],[7,5]],"V":[[7,2],[8,2]]},"text":"Feri era el único en una silla. Las sillas están en R2C2, R4C3, R6C1 y R6C3; R2C2 está en la fila de Dávid y R6C1 en la columna de Ildikó, así que Feri está en R4C3 o en R6C3. Veamos ahora la fila 6, donde también tiene que haber alguien: R6C1 está en la columna de Ildikó, R6C2 es la mesa, R6C4 está en la columna de Csilla, R6C7 es la cesta de balones y R6C8 está en la columna de Bori. Quedan R6C3, R6C5 y R6C6. R6C5 y R6C6 están en el Gimnasio pero no junto a ningún banco, así que no le sirven a nadie: Attila estaba en la fila 8, Eszter junto a un banco, Viktor en la Sala de profesores y Feri en una silla. R6C3 es una silla, y solo Feri puede sentarse en ella: <b>Feri está en R6C3</b> – en la Sala de profesores, donde encontraron a la víctima."},{"place":["E","A","V"],"text":"En la fila 4 también tiene que haber alguien. R4C1 es la cafetera exprés, R4C3 está en la columna de Feri, las columnas 4 y 7 están ocupadas y R4C8 es el trofeo. R4C2 y el propio banco (R4C5) no están junto a ningún banco, así que ninguno de los que faltan puede estar ahí – la fila 4 es de Eszter, en R4C6 junto al banco: <b>Eszter está en R4C6.</b> Feri estaba en la Sala de profesores, y el asesino estaba allí a solas con la víctima, así que nadie más estaba en la Sala de profesores. Attila está en la fila 8: las columnas 1 y 7 están ocupadas, R8C4 y R8C8 son objetos, R8C2 y R8C3 pertenecen a la Sala de profesores y R8C6 está en la columna de Eszter – <b>Attila está en R8C5.</b> Viktor estaba en la Sala de profesores; las filas 5, 6 y 8 y las columnas 1 y 3 están ocupadas, así que <b>Viktor está en R7C2.</b>"},{"final":true,"text":"Caso cerrado: Viktor estaba a solas en la Sala de profesores con el profesor de educación física. <b>¡Feri es el asesino!</b>"}],"solver":{"rules":[],"occupiable":["armchair","bench","chair","crashmat","sofa"]},"verification":{"tool":"tools/murdoku_solver.py","unique":true,"guessFree":true,"checked":"2026-10-08"},"score":0.0025}