In the apocalypse of natural disasters, she has a universal APP

She didn't know the process of the survivors in the entire B City, or even across the country, moving to official refuge bases in various places.

The frozen water turned into ice and the raised road was beneath my feet. When I looked up, I saw the heavy snow hitting the top. At the same time, I dropped my blade to catch the wind.

Does everyone have an official means of transportation? have no idea.

Can your physical condition still hold up? have no idea.

How long will the material reserves be enough? have no idea.

Is there anyone silently submerged in the cold by this ice and snow?

Natural disasters blocked people's way forward and closed her windows, so she closed her eyes, turned around, and lived her own life.

……

Recently, she has found a new pastime.

I saw it when I was flipping through my phone. Among the games I had installed before, there was a Sudoku APP. Unfortunately, I was not connected to the Internet and couldn't play it.

——Actually, she was also wondering, why do you have to go online for Sudoku? Can't it be done on a single machine?

Of course, she still reflected on herself and realized that there must be a stand-alone Sudoku version, but the one she originally downloaded and installed was online.

In short, she happened to see that the game she clicked on was unplayable, and it actually aroused her desire to play. The main theme was rebellion.

Just, what you really can’t get will always cause turmoil.

So, she first searched to see if there was Sudoku in the downloaded stand-alone game installation package. After searching, there was no Sudoku.

She is not discouraged. If she can't play video games, she will try another form! Sudoku is originally a game played on paper.

So, I rummaged through the book area of ​​the space and found stacks of Sudoku books for her.

She picked the biggest and thickest book, climbed into bed with it, sat back in movie viewing mode, raised her legs, put the book on her knees, took a mechanical pencil and started filling in the grid.

Sudoku, according to her definition, is a mathematical puzzle game and a good way to kill time.

The 9x9 large grid is composed of nine 3x3 small grids separated by thick lines. This is the board of the Sudoku game.

What the player has to do is to fill in the nine numbers from 1 to 9 in each row, column and each small grid without repetition, and successfully pass the level.

In the Sudoku question surface, most of the grids will be hollowed out, and players can make inferences based on the existing numbers, peel off the cocoons, and lock the unique number in each grid.

In the row, column and small nine-square grid where a grid is located, after excluding the numbers that have already appeared, the rest are possible results.

In this way, you can infer cell by cell, and then compare, confirm, and delete each other to filter out the correct answer.

This is why you have to play with a pencil. You can mark all the possible answers in each empty box with a pencil, leaving one at the end, and just erase the others with an eraser.

From this point of view, it is much more convenient than the form of video games.

Although this kind of electronic Sudoku game also has annotation function, it still has to be clicked one by one, which is not as convenient as handwriting directly.

Therefore, paper games are most fun when implemented on paper.

The Sudoku book she picked was very large. The grids on each page were large, and the empty grids were also large. There was more space for writing, so there was no need to squeeze into a small grid.

The front of a page is the question, and the back is the answer. The paper is relatively thick and of good quality. The printing does not show through to the back, so it is easy to turn over the answers.

The book is very thick, and the difficulty of the questions is also very comprehensive, ranging from entry level to hell difficulty. I feel that after completing this book, I will make a big leap in my ability to solve Sudoku.

It’s good to have a different pastime. Even though there are many video files, you will get tired of flipping through them every day. Occasionally, there are time-killing things like this that can immerse all your attention in it, which is very relieved.

When she played Sudoku, she didn't care about speed or becoming a Sudoku expert. She just played slowly, pushing one square at a time, and then eliminating them one by one.

She enjoys this immersive process, especially the boring moments when she doesn't know what to do. It is especially suitable for killing time.

As she played around, she discovered a similar way to play.

I also found it in that pile of books, with the same name, called Number Pictures, and it also combines coloring and scratch-off games, two very popular games on paper.

Speaking of which, the history of this game is almost as long as Sudoku, and the form is somewhat similar.

The same palace grid also has numbers, but there is no need to write in the grid, but to scratch off the coating

——The paper pages have been upgraded to thicker coated paper. Likewise, the front is the question and the back is the answer. The disk is covered with special material that can be scratched off.

The entire board is also a grid, but it is not divided into smaller grids, it is a whole sheet; it is not limited to 9x9. She flipped through the book. The smallest one is 5x5, and the largest one can be 15x15.

There will be a number marked on the side of each row and column. This number represents how many grids in this row and column need to be scratched.

It doesn’t have to be just one number. When there are multiple numbers separated by spaces, it means that there are also these grids that need to be scratched out in this row/column, and there must be gaps in the middle.

The book is very thick and comes with a special scratch pen——

The scratchable material covering the disk was different from what she had imagined. She originally thought it was the kind of silver material commonly seen in scratch-off areas, which would leave crumbs after scratching.

This book is different. It can even be said that it is more like "wiping" than "scraping".

The scraping pen has two ends. One end is responsible for "scraping". It is an eraser-like thing. If you rub it directly on the grid, you can "scrape" off the coating on it without scraping off any debris;

The other end is a "touch-up" pen. The tip of the pen is shaped like a marker. When applying, it does not produce ink, but the same covering material.

It has two functions. One is that if you make a mistake in scraping, you can use this end to make it up; the other is that you can mark the grids that do not need to be scratched off.

When you apply it on top of the existing coating, the color will change and you can see it clearly; if you make a mistake, just rub it off with the scraper.

When the material is "scraped" away, the grids on the paper below are exposed. Each grid is marked with a number, which is a serial number with a circle on the outside to distinguish it from the numbers at both ends of the row.

The circled numbers written in the grid represent colors. At the bottom of each page, there will be a paragraph of explanatory text indicating what color each circled number represents.

After scratching, you can color according to the numbers.

The packaging of this book is very gorgeous. It is a transparent PVC packaging bag. In addition to the book itself, there are five scratch pens and a small box of watercolor pens.

This box of watercolor pens is used for coloring. The color markings on the pen barrel correspond to the color guides on the pages of the book.

However, you can also use other colored pens, as long as they can leave color on the coated paper.