|
|
| (5 intermediate revisions by the same user not shown) |
| Line 1: |
Line 1: |
| − | A nozoki (term borrowed from Go) is a [[Forcing moves|forcing move]] to which opponent has just a single answer to defend against an immediate threat. This situation occurs if one threatens to cut a connection between major groups or key stones of the opponent. The stone causing this threat is called a nozoki.
| + | #REDIRECT [[Peep]] |
| − | | + | |
| − | Sometimes it's hard to tell if a move is [[Forcing moves|forcing]], i.e. if the nozoki is correct or wrong. Playing correct nozokis is one of the most sophisticated aspects of Hex strategy.
| + | |
| − | | + | |
| − | == Example ==
| + | |
| − | <hexboard size="6x6"
| + | |
| − | coords="show"
| + | |
| − | contents="B :d3 R :e4 B :e3 R :b3 B :b4 E *:c4 E *:c3 R c2 d5"
| + | |
| − | /><br/>
| + | |
| − | | + | |
| − | In this position, Redr can play 2 '''correct nozokis''' — c4 or c3. If Red plays c3, Blue must defend with c4. If Red plays c4, Blue must defend with c3. Otherwise, Blue loses the game.
| + | |
| − | | + | |
| − | Notice that moves at a4, a5, f2 and f3 are '''wrong nozokis'''. Against a4 or a5, Blue has a choice of playing b5, which potentially improves Blue's position. Similarly, against f2 or f3, Blue should play d2.
| + | |
| − | | + | |
| − | == Crucial nozoki ==
| + | |
| − | | + | |
| − | Playing nozokis can be very useful. In certain situations, playing a nozoki can make the difference between winning and losing. Consider the following example:
| + | |
| − | | + | |
| − | <hexboard size="9x9"
| + | |
| − | coords="show"
| + | |
| − | contents="B :h4 R :d4 B :e5 R :g6 B :c6 R g4 B g5 E *:d6"
| + | |
| − | /><br/>
| + | |
| − | | + | |
| − | The only winning move for Red is the nozoki at d6. If Red misses it, the game proceeds as follows and Blue wins:
| + | |
| − | | + | |
| − | <hexboard size="9x9"
| + | |
| − | coords="show"
| + | |
| − | contents="B :h4 R :d4 B :e5 R :g6 B :c6 R g4 B g5 R 1:f5 B 2:f6 R 3:e6 B 4:d8 R 5:e7 B 6:e9"
| + | |
| − | /><br/>
| + | |
| − | | + | |
| − | If Red starts by playing d6 instead, Red wins.
| + | |
| − | | + | |
| − | <hexboard size="9x9"
| + | |
| − | coords="show"
| + | |
| − | contents="B :h4 R :d4 B :e5 R :g6 B :c6 R g4 B g5 R 1:d6 B 2:d5 R 3:f5"
| + | |
| − | /><br/>
| + | |
