Solved deduction puzzles
Original Roboku cases to solve with pen and paper. Each one comes with its board, every suspect's clue and a reasoned step-by-step solution, so you can see how to reach the answer, not just what it is.
They go from easiest to hardest. If it's your first time, read how to play first; for the four- and five-star ones, the strategy guide will help.
| Case | Stolen item | Board | Suspects | Difficulty |
|---|---|---|---|---|
| Case 1 | Ancient Treatise | 6×6 | 5 | ★☆☆☆☆ |
| Case 2 | Mother-of-Pearl Shell | 6×6 | 5 | ★☆☆☆☆ |
| Case 3 | Illuminated Book | 6×6 | 5 | ★☆☆☆☆ |
| Case 4 | Giant Pearl | 6×6 | 5 | ★☆☆☆☆ |
| Case 5 | Secret Diary | 6×6 | 5 | ★☆☆☆☆ |
| Case 6 | Inca Quipu | 6×6 | 5 | ★☆☆☆☆ |
| Case 7 | Miniature Anchor | 6×6 | 5 | ★☆☆☆☆ |
| Case 8 | Ruby Brooch | 6×6 | 5 | ★☆☆☆☆ |
| Case 9 | Giant Pearl | 6×6 | 5 | ★☆☆☆☆ |
| Case 10 | Illuminated Book | 6×6 | 5 | ★★☆☆☆ |
| Case 11 | Embroidered Kimono | 6×6 | 5 | ★★☆☆☆ |
| Case 12 | Old Map | 7×7 | 6 | ★★☆☆☆ |
| Case 13 | Ceremonial Waraji | 7×7 | 6 | ★★☆☆☆ |
| Case 14 | Ancient Mask | 8×8 | 6 | ★★☆☆☆ |
| Case 15 | Inca Quipu | 8×8 | 6 | ★★☆☆☆ |
| Case 16 | Porcelain Vase | 7×7 | 6 | ★★★☆☆ |
| Case 17 | Golden Helmet | 7×7 | 6 | ★★★☆☆ |
| Case 18 | Egyptian Urn | 7×7 | 6 | ★★★☆☆ |
| Case 19 | Giant Pearl | 7×7 | 6 | ★★★☆☆ |
| Case 20 | Pocket Watch | 7×7 | 6 | ★★★☆☆ |
| Case 21 | Antique Violin | 8×8 | 6 | ★★★☆☆ |
| Case 22 | Egyptian Urn | 8×8 | 7 | ★★★☆☆ |
| Case 23 | Carved Totem | 8×8 | 6 | ★★★☆☆ |
| Case 24 | Ruby Brooch | 9×9 | 7 | ★★★☆☆ |
| Case 25 | Ancient Treatise | 7×7 | 6 | ★★★★☆ |
| Case 26 | Royal Opal | 8×8 | 7 | ★★★★☆ |
| Case 27 | Illuminated Book | 8×8 | 7 | ★★★★☆ |
| Case 28 | Antique Violin | 8×8 | 7 | ★★★★☆ |
| Case 29 | Trident of Neptune | 9×9 | 7 | ★★★★☆ |
| Case 30 | Crystal Starfish | 9×9 | 6 | ★★★★☆ |
| Case 31 | Trident of Neptune | 9×9 | 7 | ★★★★☆ |
| Case 32 | Star Sapphire | 10×10 | 6 | ★★★★☆ |
| Case 33 | Egyptian Urn | 9×9 | 7 | ★★★★★ |
| Case 34 | Illuminated Book | 9×9 | 8 | ★★★★★ |
| Case 35 | Ancient Treatise | 9×9 | 8 | ★★★★★ |
| Case 36 | Carved Totem | 9×9 | 7 | ★★★★★ |
| Case 37 | Trident of Neptune | 10×10 | 8 | ★★★★★ |
| Case 38 | Inca Quipu | 10×10 | 9 | ★★★★★ |
| Case 39 | Egyptian Urn | 10×10 | 7 | ★★★★★ |
| Case 40 | Antique Violin | 10×10 | 7 | ★★★★★ |
| Case 41 | Inca Quipu | 10×10 | 9 | ★★★★★ |
| Case 42 | Sacred Scroll | 10×10 | 7 | ★★★★★ |
| Case 43 | Ruby Brooch | 10×10 | 8 | ★★★★★ |
| Case 44 | Star Sapphire | 11×11 | 7 | ★★★★★ |
| Case 45 | Antique Violin | 11×11 | 7 | ★★★★★ |
| Case 46 | Star Sapphire | 11×11 | 7 | ★★★★★ |
| Case 47 | Giant Pearl | 11×11 | 8 | ★★★★★ |
| Case 48 | Medieval Codex | 11×11 | 9 | ★★★★★ |
| Case 49 | Medieval Codex | 11×11 | 9 | ★★★★★ |
| Case 50 | Giant Pearl | 12×12 | 8 | ★★★★★ |
| Case 51 | Star Sapphire | 12×12 | 7 | ★★★★★ |
| Case 52 | Trident of Neptune | 12×12 | 9 | ★★★★★ |
| Case 53 | Royal Opal | 12×12 | 9 | ★★★★★ |
| Case 54 | Ancient Mask | 12×12 | 8 | ★★★★★ |
| Case 55 | Gold Necklace | 12×12 | 10 | ★★★★★ |
| Case 56 | Giant Pearl | 12×12 | 7 | ★★★★★ |
| Case 57 | Sacred Scroll | 12×12 | 9 | ★★★★★ |
| Case 58 | Antique Violin | 12×12 | 9 | ★★★★★ |
| Case 59 | Ancient Treatise | 12×12 | 6 | ★★★★★ |
| Case 60 | Ruby Brooch | 12×12 | 7 | ★★★★★ |