Edge template V1a - Revision history

Selinger: Fixed a typo.

2022-08-27T13:44:24Z

Fixed a typo.

Selinger: /* Red's threats */ Added two missing reductions.

2021-07-06T00:57:48Z

‎Red's threats: Added two missing reductions.

Selinger: Simplified the analysis

2021-07-05T15:50:48Z

Simplified the analysis

Selinger: Updated a link.

2021-06-20T21:44:50Z

Updated a link.

Selinger: Converted to new hexboard diagrams. Some copy-editing.

2020-12-12T04:32:56Z

Converted to new hexboard diagrams. Some copy-editing.

Show changes

Selinger: Merged "Defending against intrusions in template 1-Va" into this page.

2020-12-11T18:50:25Z

Merged "Defending against intrusions in template 1-Va" into this page.

Selinger: Selinger moved page Template Va to Edge template V1a: The page should be named like other template pages.

2020-12-11T18:40:51Z

Selinger moved page Template Va to Edge template V1a: The page should be named like other template pages.

Demer: Converted to new hexboard diagrams

2020-12-07T06:00:37Z

Converted to new hexboard diagrams

Halladba: added cat edge templates

2008-10-26T11:18:16Z

added cat edge templates

Halladba: stuff about opening + category. (it is not a redirect anymore)

2008-10-26T11:14:51Z

stuff about opening + category. (it is not a redirect anymore)

@@ Line 134: / Line 134: @@
 === If Blue moves at z: ===
-The situation is entirely symmetric to when Blue moves at y. Red can respond at 2. To stop the immediate connection, Blue must play at a or b.
+The situation is entirely symmetric to when Blue moves at z. Red can respond at 2. To stop the immediate connection, Blue must play at a or b.
 <hexboard size="5x10"

@@ Line 20: / Line 20: @@
 === Red's threats ===
-Reduction to [[edge template III1b|template III-1-b]]:
+Reductions to a [[ziggurat]]:
 <hexboard size="5x10"
     visible="area(a5,c3,d3,f1,h1,h2,i2,i3,j3,j5)"
     edges="bottom"
     coords="none"
-    contents="R g1 R f3 S area(f2,c5,g5,g2)-e5"
+    contents="R g1 R f3 S area(f2,f3,d5,g5,g2)"
     />
@@ Line 54: / Line 60: @@
     coords="none"
     contents="R g1 R g2 S area(f2,d3,b5,i5,i3,h2)-f4"
     />

@@ Line 94: / Line 94: @@
 === If Blue moves at y: ===
-Red's best response is to [[bridge]] to 2. To stop the threatened immediate connection, Blue must block at 3 or intrude on the bridge. If Blue plays at 3, Red plays the following sequence of forcing moves:
+Red can respond at 2, which is connected to the bottom and forms a loose connection with the Red piece on the 5th row. To stop the immediate connection, Blue must play at a or b.
 <hexboard size="5x10"
@@ Line 100: / Line 100: @@
     edges="bottom"
     coords="none"
-    contents="R g1 B 1:d5 R 2:h2 B 3:h3 R 4:f4 B 5:g2 R 6:f2 B 7:f3 R 8:e3 E +:(c4 e4)"
+    contents="R g1 B 1:d5 R 2:f4 E a:g2 b:f3"
     />
-Red is now connected to the edge by [[double threat]] at the cells marked "+".
+If Blue moves at a, Red connects via [[Fourth_row_edge_templates#IV-2-p|edge template IV2p]].
-If Blue intrudes on the bridge instead, play proceeds similarly:
-−
 <hexboard size="5x10"
     visible="area(a5,c3,d3,f1,h1,h2,i2,i3,j3,j5)"
     edges="bottom"
     coords="none"
-    contents="R g1 B 1:d5 R 2:h2 B 3:g2 R 4:h1 B 5:h3 R 6:f4 B 7:g3 R 8:f2 B 9:f3 R 10:e3 E +:(c4 e4)"
+    contents="R g1 B 1:d5 R 2:f4 B 3:g2 R 4:f2"
     />
 === If Blue moves at z: ===
-Red's best response is 2, which is connected to the bottom and forms a loose connection with the Red's piece on the 5th row. To stop the immediate connection, Blue must play at a or b.
+The situation is entirely symmetric to when Blue moves at y. Red can respond at 2. To stop the immediate connection, Blue must play at a or b.
 <hexboard size="5x10"
@@ Line 126: / Line 129: @@
     />
-If Blue moves at a, Red plays the following forcing sequence, connecting by double threat at "+".
+If Blue moves at a, Red connects via [[Fourth_row_edge_templates#IV-2-p|edge template IV2p]].
 <hexboard size="5x10"
     visible="area(a5,c3,d3,f1,h1,h2,i2,i3,j3,j5)"
     edges="bottom"
     coords="none"
-    contents="R g1 B 1:f5 R 2:e4 B 3:f2 R 4:g2 B 5:f3 R 6:g3 E +:(f4 h4)"
+    contents="R g1 B 1:f5 R 2:e4 B 3:f2 R 4:g2"
     />
-If Blue moves at b, Red plays the following forcing sequence, again connecting by double threat.
+If Blue moves at b, Red connects via [[edge template IV2a]].
 <hexboard size="5x10"
     visible="area(a5,c3,d3,f1,h1,h2,i2,i3,j3,j5)"
     edges="bottom"
     coords="none"
-    contents="R g1 B 1:f5 R 2:e4 B 3:f3 R 4:e2 B 5:d5 R 6:e5 B 7:e3 R 8:d3 E +:(c4 d4)"
+    contents="R g1 B 1:f5 R 2:e4 B 3:f3 R 4:e2"
     />
 [[Category: Advanced Strategy]]
 [[Category: Edge templates]]

@@ Line 20: / Line 20: @@
 === Red's threats ===
-Reduction to [[defending against intrusions in template 1-IIIb|template III-1-b]]:
+Reduction to [[edge template III1b|template III-1-b]]:
 <hexboard size="5x10"
     visible="area(a5,c3,d3,f1,h1,h2,i2,i3,j3,j5)"

@@ Line 1: / Line 1: @@
 <hexboard size="5x10"
     visible="area(a5,c3,d3,f1,h1,h2,i2,i3,j3,j5)"
@@ Line 8: / Line 10: @@
 This [[edge template]] appears often as a third move, for instance in the [[a3 opening]], because the played piece is guaranteed to link to one edge and is not too far from the other one. Thus it follows the principle of the [[weakest link]].
 [[Defending against intrusions in template 1-Va|Proof]] of the template.

← Older revision	Revision as of 18:40, 11 December 2020
(No difference)

← Older revision		Revision as of 11:18, 26 October 2008
Line 8:		Line 8:

	[[Category: Advanced Strategy]]		[[Category: Advanced Strategy]]
		+	[[Category: Edge templates]]

← Older revision		Revision as of 11:14, 26 October 2008
Line 1:		Line 1:
−	~~#REDIRECT~~ [[Defending against intrusions in template 1-Va]]	+	<hex>R5 C10 Q0
		+	1:SSSSS_R_SS 2:SSSS_____S 3:SS 4:S</hex>
		+
		+	This [[edge template]] appears often as a third move, for instance in the [[a3 opening]], because the played piece is guaranteed to link to one edge and is not too far from the other one. Thus it follows the principle of the [[weakest link]].
		+
		+
		+	[[Defending against intrusions in template 1-Va\|Proof]] of the template.
		+
		+	[[Category: Advanced Strategy]]