Difference between revisions of "Edge template IV2b"

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== The Edge template IV2b ==
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Template IV2-b is a 4th row [[edge template]] with 2 stones:
<hex> R4 C5
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Sa1 Sb1 Vc1  Se1
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Sa2 Vb2
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  Sa3 </hex>
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Read has two threats:
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<hexboard size="4x5"
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  coords="none"
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  edges="bottom"
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  visible="-a1--a3 b1 e1"
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  contents="R c1 b2"
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  />
  
<hex> R4 C5 Sa1 Sb1 Vc1 Vb3 Pa4 Pb4 Se1 Sa2 Vb2 Sa3 </hex>
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== Defending the template ==
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Red has two main threats:
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<hexboard size="4x5"
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  coords="none"
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  edges="bottom"
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  visible="-a1--a3 b1 e1"
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  contents="R c1 b2 R b3 E +:a4 +:b4"
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  />
 
and
 
and
<hex> R4 C5 Sa1 Sb1 Vc1 Vd2 Pd1 Pc2 Pe2 Pc3 Pd3 Pe3 Pb4 Pc4 Pd4 Pe4 Se1 Sa2 Vb2 Sa3 </hex>
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<hexboard size="4x5"
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  coords="none"
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  edges="bottom"
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  visible="-a1--a3 b1 e1"
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  contents="R c1 b2 R d2 E +:(d1 c2 b4--e4 c3--e3 e2)"
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  />
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These threats overlap at only one hex, marked "x":
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 +
<hexboard size="4x5"
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  coords="none"
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  edges="bottom"
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  visible="-a1--a3 b1 e1"
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  contents="R c1 b2 E x:b4"
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  />
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If Blue plays at x:
  
These threats overlap on one hex at b4:
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<hexboard size="4x5"
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  coords="none"
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  edges="bottom"
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  visible="-a1--a3 b1 e1"
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  contents="R c1 b2 B 1:b4 R 2:b3 B 3:a4 R 4:d3"
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  />
  
<hex> R4 C5 Sa1 Sb1 Vc1 H1b4 V2b3 H3a4 V4d3 Se1 Sa2 Vb2 Sa3 </hex>
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Then Red is connected by a [[crescent]].
  
The d3 piece is connected to the bottom, and connects to the template pieces through either c3, or a bridge with d2.
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[[category:edge templates]]

Latest revision as of 17:02, 14 February 2022

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

Defending the template

Red has two main threats:

and

These threats overlap at only one hex, marked "x":

x

If Blue plays at x:

2431

Then Red is connected by a crescent.