Difference between revisions of "Edge template IV2f"

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m (typo correction)
(Converted to new hexboard diagrams)
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The template:
+
Template IV2-f is a 4th row [[edge template]] with 2 stones.
  
 
<hexboard size="4x5"
 
<hexboard size="4x5"
 
   coords="hide"
 
   coords="hide"
   contents="E *:a1 E *:b1 E *:c1 R d1 E *:e1 E *:a2 E *:b2 E *:a3 R b3 E *:c4"
+
   edges="bottom"
 +
  visible="area(d1,a4,e4,e1)"
 +
  contents="R e1 a4"
 
   />
 
   />
 
    
 
    
 +
== Defending the template ==
 +
 
Red has two main threats:
 
Red has two main threats:
<hexboard size="4x5"
+
<hexboard size="4x5"
 
   coords="hide"
 
   coords="hide"
   contents="E *:a1 E *:b1 E *:c1 R e1 E *:a2 E *:b2 E +:d2 E +:e2 E *:a3 R 1:d3 R a4 E +:c4 E +:d4"
+
  edges="bottom"
 +
  visible="area(d1,a4,e4,e1)"
 +
   contents="R e1 a4 E +:d2 E +:e2 R 1:d3 E +:c4 E +:d4"
 
   />
 
   />
 
 
and
 
and
<hexboard size="4x5"
+
<hexboard size="4x5"
 
   coords="hide"
 
   coords="hide"
 +
  edges="bottom"
 +
  visible="area(d1,a4,e4,e1)"
 
   contents="E *:a1 E *:b1 E *:c1 E +:d1 R e1 E *:a2 E *:b2 R 1:c2 E +:d2 E *:a3 E +:b3 E +:c3 R a4 E +:b4 E +:c4"
 
   contents="E *:a1 E *:b1 E *:c1 E +:d1 R e1 E *:a2 E *:b2 R 1:c2 E +:d2 E *:a3 E +:b3 E +:c3 R a4 E +:b4 E +:c4"
 
   />
 
   />
Line 20: Line 27:
 
using [[Edge_template_III2d|III-2-d]].
 
using [[Edge_template_III2d|III-2-d]].
  
For trying to block the connection Blue has to play on the overlap:
+
For trying to block the connection Blue has to play on the overlap, i.e., either at "a" or "b":
 
+
 
<hexboard size="4x5"
 
<hexboard size="4x5"
   contents="E *:a1 E *:b1 E *:c1 R e1 E *:a2 E *:b2 E +:d2 E *:a3 R a4 E +:c4"
+
  coords="hide"
 +
  edges="bottom"
 +
  visible="area(d1,a4,e4,e1)"
 +
   contents="E *:a1 E *:b1 E *:c1 R e1 E *:a2 E *:b2 E a:d2 E *:a3 R a4 E b:c4"
 
   />
 
   />
  
First attempt (b2):
+
If Blue plays at "a":
  
 
<hexboard size="4x5"
 
<hexboard size="4x5"
 
   coords="hide"
 
   coords="hide"
 +
  edges="bottom"
 +
  visible="area(d1,a4,e4,e1)"
 
   contents="E *:a1 E *:b1 E *:c1 R e1 E *:a2 E *:b2 B 1:d2 R 2:e2 E *:a3 R 6:c3 R 4:d3 R a4 B 5:c4 B 3:d4"
 
   contents="E *:a1 E *:b1 E *:c1 R e1 E *:a2 E *:b2 B 1:d2 R 2:e2 E *:a3 R 6:c3 R 4:d3 R a4 B 5:c4 B 3:d4"
 
   />
 
   />
  
Second attempt (c4):
+
If Blue plays at "b":
  
 
<hexboard size="4x5"
 
<hexboard size="4x5"
 
   coords="hide"
 
   coords="hide"
 +
  edges="bottom"
 +
  visible="area(d1,a4,e4,e1)"
 
   contents="E *:a1 E *:b1 E *:c1 R e1 E *:a2 E *:b2 E *:a3 R 4:c3 R 2:d3 R a4 B 1:c4 B 3:d4"
 
   contents="E *:a1 E *:b1 E *:c1 R e1 E *:a2 E *:b2 E *:a3 R 4:c3 R 2:d3 R a4 B 1:c4 B 3:d4"
 
   />
 
   />

Revision as of 05:04, 9 December 2020

Template IV2-f is a 4th row edge template with 2 stones.

Defending the template

Red has two main threats:

1

and

1

using III-2-d.

For trying to block the connection Blue has to play on the overlap, i.e., either at "a" or "b":

ab

If Blue plays at "a":

126453

If Blue plays at "b":

4213

See also