Difference between revisions of "Edge template IV2a"

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m (added cat. edge templates)
(Converted to new hexboard diagrams)
 
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== The edge template IV-2-a ==
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Template IV2-a is a 4th row [[edge template]] with 2 stones:
  
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<hex>R4 C4 Vc1 Vd1 Sa1 Sa2 Sa3 Sb1 </hex>
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<hexboard size="4x4"
 +
  coords="none"
 +
  edges="bottom"
 +
  visible="-a1--a3 b1"
 +
  contents="R c1 d1"
 +
  />
 +
 
 +
== Defending the template ==
  
 
Red has two relevant threats:
 
Red has two relevant threats:
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<hex>R4 C4 Vc1 Vd1 Vb3 Pb2 Pc2 Pa4 Pb4 Sa1 Sa2 Sa3 Sb1 </hex>
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<hexboard size="4x4"
 +
  coords="none"
 +
  edges="bottom"
 +
  visible="-a1--a3 b1"
 +
  contents="R c1 d1 R b3 E +:(b2 c2 a4 b4)"
 +
  />
 
and
 
and
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<hex>R4 C4 Vc1 Vd1 Vc3 Pc2 Pd2 Pb4 Pc4 Sa1 Sa2 Sa3 Sb1 </hex>
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<hexboard size="4x4"
−
 
+
  coords="none"
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This leaves blue with two options:  
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  edges="bottom"
 +
  visible="-a1--a3 b1"
 +
  contents="R c1 d1 R c3 E +:(c2 d2 b4 c4)"
 +
  />
 +
This leaves Blue with two options in the overlap of these threats:  
  
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<hex>R4 C4 Vc1 Vd1 Pc2 Pb4 Sa1 Sa2 Sa3 Sb1 </hex>
+
<hexboard size="4x4"
 +
  coords="none"
 +
  edges="bottom"
 +
  visible="-a1--a3 b1"
 +
  contents="R c1 d1 E x:c2 y:b4"
 +
  />
  
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=== Solution to the intrusion at c2 ===
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If Blue plays at x:
  
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<hex>R4 C4 Vc1 Vd1 H1c2 V2d2 H3c4 V4b3 Sa1 Sa2 Sa3 Sb1 </hex>
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<hexboard size="4x4"
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The b3 piece is connected to the bottom and connects to the top via either b2 or c3.
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  coords="none"
 +
  edges="bottom"
 +
  visible="-a1--a3 b1"
 +
  contents="R c1 d1 B 1:c2 R 2:d2 B 3:c4 R 4:b3 E +:b2 +:c3"
 +
  />
 +
Red is connected by double threat at the two cells marked "+".
  
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=== Solution to the intrusion at b4 ===
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If Blue plays at y:
  
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<hex>R4 C4 Vc1 Vd1 H1b4 V2d3 H3d2 V4b3 Sa1 Sa2 Sa3 Sb1 </hex>
+
<hexboard size="4x4"
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The b3 piece connects via either a4 or c3.
+
  coords="none"
 +
  edges="bottom"
 +
  visible="-a1--a3 b1"
 +
  contents="R c1 d1 B 1:b4 R 2:b3 B 3:a4 R 4:d3"
 +
  />
 +
Red is connected by a [[trapezoid]].
  
 
[[category:edge templates]]
 
[[category:edge templates]]

Latest revision as of 18:23, 11 December 2020

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

Defending the template

Red has two relevant threats:

and

This leaves Blue with two options in the overlap of these threats:

xy

If Blue plays at x:

1243

Red is connected by double threat at the two cells marked "+".

If Blue plays at y:

2431

Red is connected by a trapezoid.

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