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-<TITLE>GNU Shogi manual - Mating problems</TITLE>
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+<TITLE>GNU Shogi manual: Notes for chess players</TITLE>
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-<H2><A NAME="SEC17">Mating problems</A></H2>
+</HEAD>
-<P>
-One good way to improve at shogi is to solve mating problems. There are
-several types of these problems, but the most common is called a
-"tsume-shogi" problem, or "tsume" problem for short. In a tsume
-problem, all pieces that are not on the board are assumed to be in the
-opponent's hand (except for your King, which is usually not shown).
-Every move you make must be check until the final checkmate. Your
-opponent may play any piece on the board or drop any of his pieces in
-hand in order to prevent the mate. In a properly constructed tsume
-problem, all of your pieces on the board and in hand must be essential
-to the solution. One consequence of this is that all of your pieces in
-hand must be played during the solution. There should only be one
-correct solution for the given number of moves. Tsume problems use
-Japanese-style move numbering; thus, a problem where you move (and give
-check), your opponent moves, and you move to give checkmate is called a
+<BODY LANG="" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#800080" ALINK="#FF0000">
-three-mover. Here is a really trivial three-mover:
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+<H3> 2.1.8 Notes for chess players </H3>
+<!--docid::SEC14::-->
<P>
-<PRE>
- 3 2 1
-----------------+
- | | | | a
-----------------+
- | | | wK | b
-----------------+
- | | | | c
-----------------+
- | bN | | | d
-----------------+
- | | | | e
-----------------+
- | | bN | | f
-----------------+
+Here are a few miscellaneous things that may confuse chess players.
+Some of these have been mentioned elsewhere, but they bear repeating.
+</P><P>
-Black in hand: S, G
+<OL>
+<LI>There is no queen.
+<P>
-</PRE>
+<LI>Pawns capture the same way they move. There is no initial
+two-space pawn move and no <EM>en-passant</EM> move.
+<P>
+<LI>There is no special castling move. There <EM>are</EM> a large
+number of possible defensive formations referred to as "castles"
+(see section <A HREF="gnushogi_15.html#SEC15">2.2 Sample game</A>) but there is no need for special moves to create
+them.
+<P>
+<LI>A given piece can only promote to <EM>one</EM> other kind of piece.
<P>
-Here, Black plays G*2b, White plays K1c, and Black plays S*1d mate.
-More typical tsume problems range from 5 moves to arbitrarily high
-numbers of moves, and they can be quite brain-busting. Tsume problems
-may seem artificial, but in the closing stages of the game where both
-players have a lot of pieces in hand, it is often necessary to give
-check at every move, or else your opponent will start a counterattack
-and will mate you before you mate him. A tsume problem is a worst-case
-scenario for the attacker: you have to mate your opponent even though he
-has every piece not on the board in hand, which means you have to
-develop sharp attacking skills. Many more tsume problems can be found
-on the internet; I particularly recommend Patrick Davin's "Shogi
-Nexus" (see section <A HREF="gnushogi_19.html#SEC22">References and links</A>).
+</OL>
+<P>
-<P></P><HR>
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