Difference between revisions of "User:Mason"

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== Relative Coordinates ==
 
== Relative Coordinates ==
−
This is a coordinate system adapted from [https://senseis.xmp.net/?Coordinates%2FRelativeCoordinates Go] that allows us to talk about important moves in the same way, regardless of board size. We use YX instead of XY because row is more important in Hex, and because we're taking the bottom red edge as our perspective, as is customary. This also most closely resembles how people talk about certain moves already. 4-4 becomes 44. 5-4 becomes 54'.
+
This is a coordinate system adapted from [https://senseis.xmp.net/?Coordinates%2FRelativeCoordinates Go] that allows us to talk about important moves in the same way, regardless of board size. We use YX instead of XY because row is more important in Hex, and because we're taking the bottom red edge as our perspective, as is customary. This also most closely resembles how people talk about certain moves already. 4-4 ("four four") is the same: 44 ("four four"). 5-4 ("five four") becomes 54' ("five four prime"). Hyphens can be optionally included, and necessarily included when a number is more than 1 digit.
 
* '''A:''' 44
 
* '''A:''' 44
 
* '''B:''' 54'
 
* '''B:''' 54'
Line 64: Line 64:
  
 
=== Switchbacks ===
 
=== Switchbacks ===
 +
 +
==== 3-5 Switchbacks ====
 +
 +
<hexboard size="6x7"
 +
  visible="-area(a1, c1, a3) f1 g1--g3"
 +
  edges="bottom"
 +
  coords="none"
 +
  contents="R d1 E arrow(9):c2 arrow(9):b3 arrow(3):a4 arrow(3):a5 S red:c2 blue:b3 red:a4 blue:a5"
 +
  />
 +
 +
==== 4-6 Switchbacks ====
 +
<hexboard size="6x4"
 +
  visible="-a1 a2 b1 d3--d6"
 +
  edges="bottom"
 +
  coords="none"
 +
  contents="R c3 d1 E arrow(9):c1 arrow(9):b2 arrow(3):a3 arrow(3):a4 S red:c1 blue:b2 red:a3 blue:a4"
 +
  />
  
 
<hexboard size="6x8"
 
<hexboard size="6x8"
Line 71: Line 88:
 
   contents="R e1 E arrow(9):c1 arrow(9):b2 arrow(3):a3 arrow(3):a4 S red:c1 blue:b2 red:a3 blue:a4"
 
   contents="R e1 E arrow(9):c1 arrow(9):b2 arrow(3):a3 arrow(3):a4 S red:c1 blue:b2 red:a3 blue:a4"
 
   />
 
   />
 +
 +
==== 5-7 Switchbacks ====
  
 
<hexboard size="7x8"
 
<hexboard size="7x8"
Line 80: Line 99:
  
 
<hexboard size="7x4"
 
<hexboard size="7x4"
−
   visible="-a1"
+
   visible="-a1 a2 b1"
 
   edges="bottom"
 
   edges="bottom"
 
   coords="none"
 
   coords="none"
−
   contents="R d3 c4 B d4 E arrow(9):b1 arrow(9):a2 arrow(3):a3 arrow(3):a4 S red:b1 blue:a2 red:a3 blue:a4"
+
   contents="R d3 c4 B d4 E arrow(9):c1 arrow(9):b2 arrow(3):a3 arrow(3):a4 S red:c1 blue:b2 red:a3 blue:a4"
 
   />
 
   />
  
Line 92: Line 111:
 
   contents="R d2 E arrow(9):c1 arrow(9):b2 arrow(3):a3 arrow(3):a4 S red:c1 blue:b2 red:a3 blue:a4"
 
   contents="R d2 E arrow(9):c1 arrow(9):b2 arrow(3):a3 arrow(3):a4 S red:c1 blue:b2 red:a3 blue:a4"
 
   />
 
   />
 +
 +
==== 6-8 Switchbacks ====
  
 
<hexboard size="8x9"
 
<hexboard size="8x9"
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=== Foldbacks ===
 
=== Foldbacks ===
 +
 +
==== 4-2 Foldbacks ====
 +
<hexboard size="5x4"
 +
  visible="-a1 d4 d5"
 +
  edges="bottom"
 +
  coords="none"
 +
  contents="R d2 d3 c4 B b4 c3 E arrow(3):a2 arrow(3):a3 arrow(9):a4 arrow(9):a5 S red:a2 blue:a3 red:a4 blue:a5"
 +
  />
  
 
<hexboard size="6x9"
 
<hexboard size="6x9"
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The cell with the + needs to be extended with empty cells such that it is adjacent to the red stone at the front of the ladder, with blue to move.
 
The cell with the + needs to be extended with empty cells such that it is adjacent to the red stone at the front of the ladder, with blue to move.
 +
 +
==== 5-2 Foldbacks ====
 +
 +
<hexboard size="6x7"
 +
  visible="-a1 e1--g1 f2 g2 g3"
 +
  edges="bottom"
 +
  coords="none"
 +
  contents="R d2 E +:b1 arrow(3):a2 arrow(3):a3 arrow(9):a5 arrow(9):a6 S red:a2 blue:a3 red:a5 blue:a6"
 +
  />
 +
 +
The cell with the + needs to be extended with empty cells such that it is adjacent to the red stone at the front of the ladder, with blue to move.
 +
 +
==== 5-3 Foldbacks ====
  
 
<hexboard size="5x5"
 
<hexboard size="5x5"
Line 127: Line 169:
 
   />
 
   />
  
−
<hexboard size="6x5"
+
<hexboard size="6x4"
−
   visible="-a1 e3--e6"
+
   visible="-a2--a6 d3--d6"
 
   edges="bottom"
 
   edges="bottom"
 
   coords="none"
 
   coords="none"
−
   contents="R d3 e1 E arrow(3):a2 arrow(3):a3 arrow(9):a4 arrow(9):a5 S red:a2 blue:a3 red:a4 blue:a5"
+
   contents="R c3 d1 E arrow(3):b2 arrow(3):b3 arrow(9):b4 arrow(9):b5 S red:b2 blue:b3 red:b4 blue:b5"
 
   />
 
   />
−
 
−
<hexboard size="6x7"
 
−
  visible="-a1 e1--g1 f2 g2 g3"
 
−
  edges="bottom"
 
−
  coords="none"
 
−
  contents="R d2 E +:b1 arrow(3):a2 arrow(3):a3 arrow(9):a5 arrow(9):a6 S red:a2 blue:a3 red:a5 blue:a6"
 
−
  />
 
−
 
−
The cell with the + needs to be extended with empty cells such that it is adjacent to the red stone at the front of the ladder, with blue to move.
 
  
 
<hexboard size="5x3"
 
<hexboard size="5x3"
Line 165: Line 198:
 
   contents="R c1 E arrow(9):b4 arrow(9):b5 arrow(3):b2 arrow(3):b3 S red:b2 blue:b3 red:b4 blue:b5"
 
   contents="R c1 E arrow(9):b4 arrow(9):b5 arrow(3):b2 arrow(3):b3 S red:b2 blue:b3 red:b4 blue:b5"
 
   />
 
   />
 +
 +
==== 6-3 Foldbacks ====
 +
 +
<hexboard size="7x8"
 +
  visible="-a1 e1--h1 f2--h2 g3 h3 h4"
 +
  edges="bottom"
 +
  coords="none"
 +
  contents="R d2 E +:b1 arrow(3):a2 arrow(3):a3 arrow(9):a5 arrow(9):a6 S red:a2 blue:a3 red:a5 blue:a6"
 +
  />
 +
 +
The cell with the + needs to be extended with empty cells such that it is adjacent to the red stone at the front of the ladder, with blue to move.
 +
 +
==== 6-4 Foldbacks ====
  
 
<hexboard size="6x5"
 
<hexboard size="6x5"
Line 179: Line 225:
 
   contents="R b1 E arrow(3):a1 arrow(3):a2 arrow(9):a3 arrow(9):a4 S red:a1 blue:a2 red:a3 blue:a4"
 
   contents="R b1 E arrow(3):a1 arrow(3):a2 arrow(9):a3 arrow(9):a4 S red:a1 blue:a2 red:a3 blue:a4"
 
   />
 
   />
 +
 
<hexboard size="6x2"
 
<hexboard size="6x2"
 
   edges="bottom"
 
   edges="bottom"
Line 192: Line 239:
 
   />
 
   />
  
−
<hexboard size="7x8"
+
==== 7-5 Foldbacks ====
−
  visible="-a1 e1--h1 f2--h2 g3 h3 h4"
+
−
  edges="bottom"
+
−
  coords="none"
+
−
  contents="R d2 E +:b1 arrow(3):a2 arrow(3):a3 arrow(9):a5 arrow(9):a6 S red:a2 blue:a3 red:a5 blue:a6"
+
−
  />
+
−
 
+
−
The cell with the + needs to be extended with empty cells such that it is adjacent to the red stone at the front of the ladder, with blue to move.
+
  
 
<hexboard size="7x3"
 
<hexboard size="7x3"
Line 233: Line 273:
 
   />
 
   />
 
Assuming * could be used for a ladder escape fork if the ladder was farther away. Blue must play at '''a'''.
 
Assuming * could be used for a ladder escape fork if the ladder was farther away. Blue must play at '''a'''.
 +
 +
== Handicap System ==
 +
The weaker player plays first with no swap. Difficulty is increased (for the weaker player) by increasing the size of the board.

Latest revision as of 16:48, 2 October 2024

Relative Coordinates

This is a coordinate system adapted from Go that allows us to talk about important moves in the same way, regardless of board size. We use YX instead of XY because row is more important in Hex, and because we're taking the bottom red edge as our perspective, as is customary. This also most closely resembles how people talk about certain moves already. 4-4 ("four four") is the same: 44 ("four four"). 5-4 ("five four") becomes 54' ("five four prime"). Hyphens can be optionally included, and necessarily included when a number is more than 1 digit.

  • A: 44
  • B: 54'
  • C: 5'4
  • D: 4'4'
  • 1: 2'3
  • 2: 5'2
1D2C3BA

3 requires some more explaining. On it's own, 3 would be 62. However, if stones 1 and 2 were the previous two moves, it can be better to refer to it as 8'2. This is because the sequence 2'3, 5'2, 8'2 is a common opening sequence, and referring to it as 8'2 means it won't change with board size. It also communicates the fact that 3's row is based on the placement of 1 and 2, and not distance from the red edge.

Edges

Relative coordinates naturally give rise to a very simple way of referring to the edges: red, red', blue, blue'.

Symmetrical Switchback Templates

Templates

This is actually 3 templates. Each blue-shaded cell represents a place you can put a blue stone and still have a template.

Ladder Escapes

Switchbacks

3-5 Switchbacks

4-6 Switchbacks

5-7 Switchbacks

6-8 Switchbacks

Only works if there's a second row foldback threat.

Foldbacks

4-2 Foldbacks

The cell with the + needs to be extended with empty cells such that it is adjacent to the red stone at the front of the ladder, with blue to move.

5-2 Foldbacks

The cell with the + needs to be extended with empty cells such that it is adjacent to the red stone at the front of the ladder, with blue to move.

5-3 Foldbacks

Generalizible to any capped flank.

6-3 Foldbacks

The cell with the + needs to be extended with empty cells such that it is adjacent to the red stone at the front of the ladder, with blue to move.

6-4 Foldbacks

7-5 Foldbacks

Ladder

Misc

a

Assuming * could be used for a ladder escape fork if the ladder was farther away. Blue must play at a.

Handicap System

The weaker player plays first with no swap. Difficulty is increased (for the weaker player) by increasing the size of the board.

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