View source for Edge template VII1a

Template VII-1a is a 7th row [[edge template]] with one stone.

<hexboard size="7x17"
  coords="none"
  edges="bottom"
  visible="area(a7,q7,q5,p3,n1,j1,f3,c5)"
  contents="R l1"
  />

This template has width 17, and its [[carrier]] has size 84, including the red stone. It was one of three templates that were discovered and verified by a collaborations of several users on the [[Hex forums|Hex Discord]] in October and November 2023. See [[Seventh row template problem]] for more information on the discovery of this template.

The template has also been verified by [[User:Bobson8|Bobson8]] in the [[HexProver]] tool. The proof can be downloaded at [https://web.archive.org/web/20240604170705/https://cdn.discordapp.com/attachments/964029738161176630/1247583327829885059/VIItest2_1.hpf?ex=66608e04&is=665f3c84&hm=de7c1c1f9a64bd770c88c1bcd5cde9309c82c6e8280e67ca8159db6d73733f19& VIItest2_1.hpf] (shared by Bobson8 in the Hex Discord server on Jun 4, 2024) and viewed in HexProver. The [https://web.archive.org/web/20240627114530/https://cdn.discordapp.com/attachments/964029738161176630/1255850706309611551/VIItest2.hdg?ex=667ea19c&is=667d501c&hm=623c912e095778202aee54e261f16e741a45218e85a1c12d76aa4a4b88305244& VIItest2.hdg] file is additionally required.

== Defending the template ==

This template is too complex to be described in full, however, some of the possible lines include:

Blue's [[Blocking|adjacent block]] may continue as follows ([https://hexworld.org/board/#17,:pa16:pb15:pc14:pd14:pe13:pf12:pg12:ph11:pi11:pj10:pk10:pq14:pq13:pq12:pp12:pp11:po11:po10:pn10:pm10l11l12j12k12k11i14h13g14h14g16j13j14n12m12h15h16i15i16j15j16k15k16m15l15m13m14o13 HexWorld]):

<hexboard size="7x17"
  coords="none"
  edges="bottom"
  visible="area(a7,q7,q5,p3,n1,j1,f3,c5)"
  contents="R l1 B 1:l2 R 2:j2 B 3:k2 R 4:k1 B 5:i4 R 6:h3 B 7:g4 R 8:h4 B 9:g6 R 10:j3 B 11:j4 R 12:n2 B 13:m2 R 14:h5 B 15:h6 R 16:i5 B 17:i6 R 18:j5 B 19:j6 R 20:k5 B 21:k6 R 22:m5 B 23:l5 R 24:m3 B 25:m4 R 26:o3"
  />

Another continuation of the adjacent block, involving the [[Tom's move#Tall variant|tall variant]] of Tom's move ([https://hexworld.org/board/#17,:pa16:pb15:pc14:pd14:pe13:pf12:pg12:ph11:pi11:pj10:pk10:pq14:pq13:pq12:pp12:pp11:po11:po10:pn10:pm10l11l12j12k12k11i14h13g14h14g16j13j14n12m13l13k15m12n13h15h16j15i17j16j17k16k17n15m16l16l17o13n16p15 HexWorld]):

<hexboard size="7x17"
  coords="none"
  edges="bottom"
  visible="area(a7,q7,q5,p3,n1,j1,f3,c5)"
  contents="R l1 B 1:l2 R 2:j2 B 3:k2 R 4:k1 B 5:i4 R 6:h3 B 7:g4 R 8:h4 B 9:g6 R 10:j3 B 11:j4 R 12:n2 B 13:m3 R 14:l3 B 15:k5 R 16:m2 B 17:n3 R 18:h5 B 19:h6 R 20:j5 B 21:i7 R 22:j6 B 23:j7 R 24:k6 B 25:k7 R 26:n5 B 27:m6 R 28:l6 B 29:l7 R 30:o3 B 31:n6 R 32:p5"
  />

[[category:edge templates]]