View source for Fourth row edge templates

== Fourth row edge templates with one stone ==

=== [[Defending_against_intrusions_in_template_1-IVa|IV-1-a]] ===

<hexboard size="4x7"
   coords="hide"
   edges="bottom"
   visible="area(e1,c2,a4,g4,g2,f1)"
   contents="R e1"
   />

=== [[Defending_against_intrusions_in_template_IVb|IV-1-b]] ===

<hexboard size="4x8"
   coords="hide"
   edges="bottom"
   visible="area(e1,c2,a4,h4,h2,g1)"
   contents="R f1 S e3"
   />
The shaded cell is not part of the template; it can be occupied by Blue.

=== [[Edge_template_IV1c|IV-1-c]] ===

<hexboard size="5x11"
   coords="hide"
   edges="bottom"
   visible="area(g1,c3,a5,k5,k3,i1)"
   contents="R f2 S c5"
   />

=== [[Edge_template_IV1d|IV-1-d]] ===

<hexboard size="5x11"
   coords="hide"
   edges="bottom"
   visible="area(g1,c5,k5,k3,i1)"
   contents="R f2"
   />

== Fourth row edge templates with two stones ==

=== [[Edge_template_IV2a|IV-2-a]] ===

<hexboard size="4x4"
  coords="hide"
  edges="bottom"
  visible="area(c1,b2,a4,d4,d1)"
  contents="R c1 d1"
  />

=== [[Edge_template_IV2b|IV-2-b]] ===

<hexboard size="4x5"
  coords="hide"
  edges="bottom"
  visible="area(c1,b2,a4,e4,e2,d1)"
  contents="R c1 b2"
  />


=== [[Edge_template_IV2c|IV-2-c]] ===

<hexboard size="4x7"
  coords="hide"
  edges="bottom"
  visible="area(e1,c2,a4,g4,g2,f1)"
  contents="R e1 f1 S e2"
  />

=== [[Edge_template_IV2d|IV-2-d]] ===

<hexboard size="4x4"
  coords="hide"
  edges="bottom"
  visible="area(d1,a4,d4)"
  contents="R d1 b3"
  />

=== [[Edge_template_IV2e|IV-2-e]] ===

<hexboard size="4x5"
  coords="hide"
  edges="bottom"
  visible="area(d1,a4,e4,e2)"
  contents="R d1 b3 S c4"
  />

=== [[Edge_template_IV2f|IV-2-f]] ===

<hexboard size="4x5"
  coords="hide"
  edges="bottom"
  visible="area(d1,a4,e4,e1)"
  contents="R a4 e1"
  />

=== [[Edge_template_IV2g|IV-2-g]] ===

<hexboard size="4x5"
  coords="hide"
  edges="bottom"
  visible="area(d1,b3,b4,e4,e1)"
  contents="R b4 e1"
  />

=== [[Edge_template_IV2h|IV-2-h]] ===

<hexboard size="4x5"
  coords="hide"
  edges="bottom"
  visible="area(d1,a4,e4,e1)"
  contents="R e1 c4"
  />

=== [[Edge_template_IV2i|IV-2-i]] ===

<hexboard size="4x5"
  coords="hide"
  edges="bottom"
  visible="area(d1,a4,d4,e2,e1)"
  contents="R c2 e1"
  />

=== [[Edge_template_IV2j|IV-2-j]] ===

<hexboard size="4x5"
  coords="hide"
  edges="bottom"
  visible="area(d1,b3,b4,e4,e1)"
  contents="R c2 e1"
  />

=== [[Edge_template_IV2k|IV-2-k]] ===

<hexboard size="4x6"
  coords="hide"
  edges="bottom"
  visible="area(c2,a4,f4,f1)"
  contents="R d2 f1"
  />

=== [[Edge_template_IV2l|IV-2-l]] ===

<hexboard size="4x6"
  coords="hide"
  edges="bottom"
  visible="area(d1,a4,f4,f1)"
  contents="R d1 f1"
  />

Red can connect both red stones to the bottom (i.e., Red does not have to choose which stone to connect).

=== [[Edge_template_IV2m|IV-2-m]] ===

<hexboard size="4x6"
  coords="hide"
  edges="bottom"
  visible="area(c1,b2,a4,f4,f1)"
  contents="R c1 arrow(12):f1"
  />

Red can connect the stone marked "↑" to the bottom. There are infinitely many related templates, with the two red stones arbitrarily far apart. See [[edge template IV2m]] for more details.

=== [[Edge_template_IV2n|IV-2-n]] ===

<hexboard size="4x8"
  coords="hide"
  edges="bottom"
  visible="area(d1,a4,h4,h1)"
  contents="R d1 h1"
  />

Red can connect both red stones to the bottom (i.e., Red does not have to choose which stone to connect).

== Fourth row edge templates with three stones ==

=== [[Edge_template_IV3a|IV-3-a]] ===

<hexboard size="4x5"
  coords="hide"
  edges="bottom"
  visible="area(c1,b2,a4,c4,e2,e1)"
  contents="R c1 d1 e1"
  />

If the middle red piece is removed, the template stays valid, as long as the two remaining stones are connected to each other in some other way.

=== [[Edge_template_IV3b|IV-3-b]] ===

<hexboard size="4x5"
  coords="hide"
  edges="bottom"
  visible="-(a1 a2 a3 b1)"
  contents="R c1 d1 e1 S d2"
  />

If the middle red piece is removed, the template stays valid, as long as the two remaining stones are connected to each others in some other way.

=== [[Edge_template_IV3c|IV-3-c]] ===

<hexboard size="4x6"
  coords="hide"
  edges="bottom"
  visible="area(f1,b3,a4,f4)"
  contents="R b3 d2 f1"
  />

[[Category: Edge templates]]