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+GNU Shogi manual: Draws
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-GNU Shogi manual - Notes for chess players
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- [Contents] [Back] [Prev] [Up] [Next] [Forward]
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+ 2.1.6 Draws
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+There are very few draws in shogi; only about 1-2% of professional games
+end in a draw. One reason for this is that material can never be
+depleted as in chess, because captured pieces are constantly re-entering
+play as a consequence of the drop rule. In fact, most of the ways a
+game can be drawn in chess are not allowed in shogi:
+
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-two-space pawn move and no en-passant move.
+There are only two legal ways in which a draw can occur:
+
-
There is no special castling move. There are a large
+
-number of possible defensive formations referred to as "castles"
-(see section Sample game) but there is no need for special moves to create
-them.
+- A position (including the pieces in hand) occurs 4 times with the same
+player to move (called "Sennichite"). However, if this is caused by
+consecutive checks (direct attacks on the King, threatening to capture
+it on the next move) by one side, the player giving these checks loses
+the game. In other words, perpetual check results in a loss for the
+attacker who recreates the same position the 4th time.
+
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- A given piece can only promote to one other kind of piece.
+
- Both players have moved their King into the the promotion zone (or they
+cannot be prevented from doing so) and the Kings cannot be checkmated.
+A King who has entered the promotion zone is known as an "entering
+King"; due to the forward orientation of most shogi pieces, it is very
+hard to mate such a King. In that case the players may decide to count
+their pieces as follows: the King does not count, the Rook and Bishop
+count as 5 points, and all other pieces as one point. Promotion is
+disregarded. If both players have at least 24 points the game is a draw
+(called "Jishogi"). If a player has less, he loses the game.
+
+
+Of course, a player can refuse to count pieces when he still has mating
+chances or chances to gain material which would affect the outcome of
+the counting. There is no strict rule about what to do if this is not
+the case, but nonetheless a player refuses to count up (e.g. because he
+does not have enough points for a draw). It has been generally accepted
+that in such a case the game ends and the pieces are counted after one
+player has managed to get all his pieces protected in the promotion
+zone.
+
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+This document was generated
+by Michael C. Vanier on July, 7 2004
+using texi2html