川渡り問題｜論理パズルで脳トレ・頭の体操

■ The classic puzzle "River Crossing Puzzle" is revived on your smartphone!

Get the whole family safely across the river──.

Enjoy the beloved logic puzzle "River Crossing Puzzle" with simple and beautiful graphics in this completely free brain-training game. Perfect for logical thinking, reasoning, and brain training!

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■ How to Play
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The rules are very simple.

① Simply get all the characters across the river to the other side.

② However, only a limited number of people can ride in the boat.

③ And if you leave one person alone on the same bank with another person... tragedy strikes.

"Who, when, and to which bank?"

When you figure out the order, you'll experience a refreshing sense of accomplishment!

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■ Includes all 4 difficulty levels
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◇ Easy
　For puzzle beginners and children. Learn the basic rules.

◇ Normal
　A standard difficulty level. Just right for logic puzzle lovers.

◇ Hard
　For adult brain training. Navigate complex constraints.

◇ Very Hard
　An extremely difficult puzzle for serious players. Can you save everyone?

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■ Recommended for:
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◎ Those who want to make brain training a habit
◎ Those who like logic puzzles and thinking games
◎ For passing the time during commutes or school breaks
◎ Those who want to think together with their children (great for educational purposes)
◎ Those who like IQ tests, riddles, and deduction games
◎ Those who know the "river crossing problem" but couldn't solve it

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■ App Features
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✔ Completely free to play at all difficulty levels
✔ Offline compatible (playable even without a signal)
✔ Simple and intuitive controls
✔ Beautiful UI optimized for landscape mode
✔ Japanese language display for ease of use
✔ Reset function for unlimited attempts
✔ Enjoyable for all ages, from children to adults.

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■ What is the River Crossing Problem?

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The "River Crossing Problem" is a classic logic puzzle where you must get all the characters on one bank of a river to the other side while adhering to certain constraints. It is said to have been mentioned in the 8th-century mathematics book of Alcuin, and various variations such as the "Wolf, Goat, and Cabbage Problem" and the "Missionary and Cannibal Problem" have been enjoyed worldwide.

This app reimagines the River Crossing Problem with a "family" theme. Experience the thrill of figuring out the optimal procedure within the constraints imposed by a diverse cast of characters including father, mother, daughter, son, grandparents, baby, and cat.

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■ Skills that can be honed
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• Logical thinking
• Problem-solving ability
• Memory and concentration
• Foresight and planning skills
• Insight and intuition

Play for just a few minutes each day and have fun while developing your mind!

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■ For those searching with these keywords
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River crossing problems / River crossing puzzles / Brain training / Logic puzzles / Thinking games / Deduction games / Riddles / IQ puzzles / Educational games
Games / Time-killing games / Free games / Offline games / Family / Parent and child / Children / Adults

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■ Feedback and Inquiries
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Please send bug reports and requests to the developer contact. We are encouraged by your feedback and will update the app to make it even better.

Now, test your logical thinking skills!
Can you safely get your whole family to the other side? We await your challenge.