Forcing move - Revision history

Selinger: /* Breaking edge templates via forcing moves */ added link

2023-10-07T15:33:10Z

‎Breaking edge templates via forcing moves: added link

Selinger: typo

2022-07-05T01:39:45Z

typo

Selinger: typo

2021-12-29T19:56:08Z

typo

Selinger: typo

2021-07-13T00:01:46Z

typo

Selinger: Updated link

2021-01-01T06:24:14Z

Updated link

Selinger: /* Using forcing moves to steal territory */ Fix coordinates in text

2020-12-30T06:39:04Z

‎Using forcing moves to steal territory: Fix coordinates in text

Selinger: /* Breaking edge templates via forcing moves */ Fixed coordinates in text

2020-12-30T06:28:59Z

‎Breaking edge templates via forcing moves: Fixed coordinates in text

Selinger: Added "see also"

2020-12-28T21:19:59Z

Added "see also"

Selinger: /* Using forcing moves to steal territory */ Adjusted diagrams.

2020-12-09T15:30:19Z

‎Using forcing moves to steal territory: Adjusted diagrams.

Selinger: /* Using forcing moves to steal territory */ Converted to new hexboard diagrams.

2020-12-09T15:27:17Z

‎Using forcing moves to steal territory: Converted to new hexboard diagrams.

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 == Breaking edge templates via forcing moves ==
-Forcing moves are the only way to successfully defeat a [[template]]. This is done by making a template intrusion that is also a more threatening forcing move. After the opponent responds to the greater threat, the attacker can play another move within the template and destroy the connection. For example, consider the following position with Red to move.
+Forcing moves are the only way to successfully defeat a [[template]]. This is done by making a template [[intrusion]] that is also a more threatening forcing move. After the opponent responds to the greater threat, the attacker can play another move within the template and destroy the connection. For example, consider the following position with Red to move.
 <hexboard size="5x5"

← Older revision		Revision as of 01:39, 5 July 2022
Line 1:		Line 1:
−	A '''forcing move''' is a move that makes a threat that your opponent must reply to on their next turn. Common forcing moves include playing in one of the empty hexes of a [[bridge]], ~~intrusion~~ into an [[edge template]], or threatening to complete an immediate [[strong connection]] or [[win]]. Consider the following position with Red to move.	+	A '''forcing move''' is a move that makes a threat that your opponent must reply to on their next turn. Common forcing moves include playing in one of the empty hexes of a [[bridge]], intruding into an [[edge template]], or threatening to complete an immediate [[strong connection]] or [[win]]. Consider the following position with Red to move.

	<hex>R9 C9 Q1 Vg3 Vg4 Vf5 Vh5 Hc7 Hd8 Hf7 Hh7</hex>		<hex>R9 C9 Q1 Vg3 Vg4 Vf5 Vh5 Hc7 Hd8 Hf7 Hh7</hex>

@@ Line 3: / Line 3: @@
 <hex>R9 C9 Q1 Vg3 Vg4 Vf5 Vh5 Hc7 Hd8 Hf7 Hh7</hex>
-At first glance, the position looks bad for Red, but she can win by making a couple of forcing moves. She plays at e8, threatening to play at e7 on his next turn which would create a winning connection. Blue has little choice but to stop this threat by playing e7, since there are no better options. The move e8 is a forcing move.
+At first glance, the position looks bad for Red, but she can win by making a couple of forcing moves. She plays at e8, threatening to play at e7 on her next turn which would create a winning connection. Blue has little choice but to stop this threat by playing e7, since there are no better options. The move e8 is a forcing move.
 The forcing nature of the move allows Red to place a piece on the other side of Blue's line without giving Blue time to do anything constructive. The e8 piece on the other side is connected to the bottom and is extremely useful to Red.

@@ Line 13: / Line 13: @@
 The group of red pieces near the bottom are connected to the bottom edge. These pieces are connected via [[bridge]]s to the group g3-g4-f5 which is in turn connected to the top edge via a [[ziggurat]].
-''(Note: the two forcing moves could just as easily be played in the reverse order. That is Red plays g7, Blue is forced to respond with f9, and then Red plays e8 which threatens to form an connection [[Double threat|in two distinct ways]].)''
+''(Note: the two forcing moves could just as easily be played in the reverse order. That is Red plays g7, Blue is forced to respond with f9, and then Red plays e8 which threatens to form a connection [[Double threat|in two distinct ways]].)''
 In general terms, the opponent has three options when responding to a forcing move.

@@ Line 86: / Line 86: @@
 == See also: ==
-* [[Nozoki]]
+* [[Peep]]
 [[category:strategy]]

@@ Line 72: / Line 72: @@
    edges="none"
    visible="area(d1,a4,a6,c6,f3,f1)"
-   contents="R d2 d4 B b4 b5 e3 E *:(c3 c4 d3)"
+   contents="R d2 d4 B b4 b5 e3 E c:c3 b:c4 a:d3 x:c2 y:b3 S c3 c4 d3"
    />
-Red wants to connect her two pieces. There are three distinct moves that accomplish this, d3, c4 (bridging to d2), and c3 (bridging to d4).
+Red wants to connect her two pieces. There are three distinct moves that accomplish this, a, b, and c.
-There is not much to be said about d3; it directly connects without altering anything else.
+There is not much to be said about a; it directly connects without altering anything else.
-c4 connects, but gives a potentially useful forcing move to Blue. Blue can respond with c3. If Red saves the connection with d3, Blue has gained a free hex of territory. The hex c2 is now directly adjacent to the c3/b4/b5 group when it wasn't previously. Hence, c4 is worse than d3.
+b connects, but gives a potentially useful forcing move to Blue. Blue can respond at c. If Red saves the connection at a, Blue has gained a free hex of territory. The hex x is now directly adjacent to Blue's group when it wasn't previously. Hence, b is worse than a.
-Now consider the last remaining possibility, c3. This leaves two forcing moves for Blue, but both of them are completely harmless! If after c3, Blue plays one of the forcing moves c4 or d3, then Red can save the link and Blue will not have gained any territory at all &mdash; any empty hexes adjacent to the forcing piece were already adjacent to Blue's existing pieces. Hence, c3 is just as safe as d3 but significantly, c3 ''gains'' one hex! &mdash; b3 is now adjacent to Red's d2/b3 group when it wasn't before. Thus, c3 is better than d3 and is the best of three choices.
+Now consider the last remaining possibility, c. This leaves two forcing moves for Blue, but both of them are completely harmless! If after c, Blue plays one of the forcing moves a or b, then Red can save the link and Blue will not have gained any territory at all &mdash; any empty hexes adjacent to the forcing piece were already adjacent to Blue's existing pieces. Hence, c is just as safe as a but significantly, c ''gains'' one hex! &mdash; y is now adjacent to Red's group when it wasn't before. Thus, c is better than a and is the best of three choices.
-In other words, c3 [[dominated cell|dominates]] c4 and d3.
+In other words, c [[dominated cell|dominates]] a and b.
 == See also: ==

@@ Line 35: / Line 35: @@
    />
-The piece on g3 is connected to the right edge by a [[ziggurat]], as shown. If Red moves at h2, she intrudes on the ziggurat while also threatening to connect via g2. Blue can only stop this threat by playing at g2. Then Red Plays i3, breaking Blue's connection to the right.
+The piece on c3 is connected to the right edge by a [[ziggurat]], as shown. If Red moves at d2, she intrudes on the ziggurat while also threatening to connect via c2. Blue can only stop this threat by playing at c2. Then Red Plays e3, breaking Blue's connection to the right.
 <hexboard size="5x5"
    coords="top left"

@@ Line 49: / Line 49: @@
    coords="none"
    edges="none"
    contents="B c2 b4 R d2 d3 E *:(b3 c3)"
    />
@@ Line 57: / Line 58: @@
    coords="none"
    edges="none"
    contents="B c2 b4 R d2 d3 R 1:b3 B 2:c3"
    />
@@ Line 69: / Line 71: @@
    coords="none"
    edges="none"
    contents="R d2 d4 B b4 b5 e3 E *:(c3 c4 d3)"
    />

@@ Line 46: / Line 46: @@
 By playing a forcing move inside the opponent's template, a player can sometimes steal [[territory]] at no cost.
-<hex>R5 C5 Hc2 Hb4 Vd2 Vd3 Sb3 Sc3</hex>
+<hexboard size="5x5"
 In this position, if Red intrudes on the left side of the bridge and Blue defends the connection, Red gains territory on the left, while giving up nothing of value on the right, and without disturbing either player's connections.
-<hex>R5 C5 Hc2 Hb4 Vd2 Vd3  N:on  Vb3 Hc3</hex>
+<hexboard size="5x5"
 Significantly, the additional territory is on the other side of Blue's connection where it may potentially be used for a future threat. The additional territory can't hurt and sometimes makes a crucial difference.
@@ Line 58: / Line 66: @@
 When you have more than one way of completing a connection, e.g. when completing a [[loose connection]], you should consider which move leaves the least valuable forcing move for your opponent. Consider the following position with Red to play.
-<hex>R5 C6 Q1 Vd2 He3 Hb4 Vd4 Hb5 *d3 *c4 *c3</hex>
+<hexboard size="6x6"
 Red wants to connect her two pieces. There are three distinct moves that accomplish this, d3, c4 (bridging to d2), and c3 (bridging to d4).