Medium cases
The Clue of "S"★★☆about 5 min
The Diary Weather★★☆about 5 min
The Entrance That Showed Nothing★★☆about 5 min
A Thousand from Eight Eights★★☆about 5 min
The Sandbag Swap★★☆about 5 min
The Barbecue Bill★★☆about 5 min
The Lock That Opens in a Blackout★★☆about 5 min
The Wet Window Frame★★☆about 5 min
Breaking a Chocolate Bar★★☆about 5 min
The Colored Dice★★☆about 5 min
Grandma's Remark★★☆about 5 min
The Under-Floor Storage★★☆about 5 min
Five in a Line★★☆about 5 min
The Convenience Store Thief★★☆about 5 min
Times Four, Reversed★★☆about 5 min
The Elevator on a Rainy Day★★☆about 5 min
The Emergency Stairs★★☆about 5 min
The Key the Intruder Placed★★☆about 5 min
Coffee and Milk★★☆about 5 min
The Label from the Wrong Era★★☆about 5 min
Depth of the Footprints★★☆about 5 min
The Balloon in the Accelerating Car★★☆about 5 min
Ten in a Circle★★☆about 5 min
The Passage Above the Ceiling★★☆about 5 min
Purity of the Crown★★☆about 5 min
The Trick That Tripped the Breaker★★☆about 5 min
Paths on a Grid★★☆about 5 min
The Faked Silhouette★★☆about 5 min
Who Broke the Promise★★☆about 5 min
The Drug in the Sugar★★☆about 5 min
Predicting the Ranking★★☆about 5 min
The Slow Clock★★☆about 5 min
The Toy Shop Clerk★★☆about 5 min
How Rabbits Multiply★★☆about 5 min
The Entry Record Off by an Hour★★☆about 5 min
The Same Date Twice★★☆about 5 min
The Medicine Bottles★★☆about 5 min
The Drink in the Painting★★☆about 5 min
The Swapped Room Numbers★★☆about 5 min
Ways to Climb the Stairs★★☆about 5 min
The Station Gate Record★★☆about 5 min
Angel, Devil, and Human★★☆about 5 min
Splitting the Bundles of Cash★★☆about 5 min
The Duplicated Key★★☆about 5 min
The Recorded Snoring★★☆about 5 min
Trading in Empty Bottles★★☆about 5 min
The Ring's Tan Line★★☆about 5 min
The Chimney★★☆about 5 min
Hints to the PIN★★☆about 5 min
Stones Thrown into the Pond★★☆about 5 min
The Portrait in the Three Caskets★★☆about 5 min
The Gap Under the Infrared Beams★★☆about 5 min
The Trains and the Bird★★☆about 5 min