Rule of Shogi

Sennichite – the Rules of Shogi (Japanese Chess)

Posted: 02/09/2019 Updated:

Kyousuke
I'll explain about sennichite. Sennichite is complicated rule.

This post describes sennichite. Sennichite is one of the shogi rules.

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What is Sennichite

Consider the case as shown in the lower figure. A player on this side is trying to capture the opponent's gold general with the rook.

Fig1. A player is trying to capture the gold general

Fig1. A player is trying to capture the gold general

Then, consider the case where the opponent moves the gold general not to be capture as shown in the lower figure.

Fig2. Moving the gold general in a left direction

Fig2. Moving the gold general in a left direction

Then, the player moves the rook to capture the gold general as shown in the lower figure.

Fig3. Moving the rook in a left direction

Fig3. Moving the rook in a left direction

 

Moreover, the opponent moves the gold general to avoid capture as shown in the lower figure.

Fig4. Moving the gold general once again

Fig4. Moving the gold general once again

 

Furthermore, the player moves the rook to capture the gold general as shown in the lower figure.

Fig5. Moving the rook once again

Fig5. Moving the rook once again

Did you notice that the situation in Fig 1 is the same as the situation in Fig 5? The lower figure shows the situation in Fig 1 to Fig 5.

Fig6. Repeating the same condition

Fig6. Repeating the same condition

Repeating the same game position is called "sennichite (千日手)." Sennichite means "moves for a thousand days" in Japanese. To say precisely, sennichite is repeating the same situation four times. (It does not matter how to move pieces to the same situation.)

Ayumi
Sennichite is repeating the same move or drop of pieces.

 

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The Case Where Sennichite Occurs

Basically, the Game Ends in a Draw

If sennichite occurs, the game ends in a draw basically.

 

Perpetual Check is an Illegal Move

For example, consider the case where sennichite occurs as shown in the lower figure.

Fig7. Perpetual check

Fig7. Perpetual check

In this situation, one player checks the opponent's king continuously. Then, the checking player loses. In shogi, a perpetual check is an illegal move.

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I’m Konan, and I live in Tokyo, Japan. I would like to tell you how interesting shogi is on this blog.