QUADREX
Copyright (c) 2007 Bill Taylor
Quadrex is played on a 19x19 Go Board.
- TURN - Players alternately drop one of their own stones onto any empty cell.
- If this results in the formation of a small square with two similar diagonal stones and one opposite stone, then the 4th cell is immediately filled by the pair's color. If this results in a similar situation, the same applies again, and so on indefinitely.
- One move equaliser.
- RULES - The winner is whoever completes an orthogonal own-path in his direction (one player owns North-South, the other East-West).
Here's a sample match:
JJJJJJJ
a b c d e f g h i j k l m n o p q r s Bx-H Jo-V Bx-H Jo-V
. . . . . . . . . . . . . . . . . . . 1. p4 k7 20. g16 e16
. . . . . . . . . . . . . . . . . . . 2. k11 g10 21. h8 j9
. . . . . . . . . . . . . . . . . . . 3. h12 e13 22. d17 g17
. . . , . x . o . x o o . . . x . . . 4. f11 c11 23. e15 g14+
. . . . . . . . x x o x . . . . . . . 5. d11 b11 24. f16+-+ h15
. . . . . . x . x o o . . . . . . . . 6. d9 b9 25. i17 i16+
. . x . . o . o o o o . . . . . . . . B 7. c7 h11 26. resign
. . . . . . x x x . . . . . . . . . . B 8. i11+ g12+
. o . x . . . o . o . . . . . . . . . B 9. g13+ f13+
. . . . . . o . . . . . . . . . . . . B 10. j4 l4
. o o x . x o o x . x . . . . . . . . B 11. i8 f7
. . . . . o o x x . . . . . . . . . . B 12. f4 h4
. . . . o o x x . . . . . . . . . . . B 13. g6 h7
. . . . . o o . . . . . . . . . . . . 14. e18 f17
. . . . x x . o . . . . . . . . . . . 15. g18 h17
. . . , o x x O O . . . . . . , . . . 16. i6 j6
. . . x o o o o x . . . . . . . . . . 17. j5+ i7+
. . . x x . x . . . . . . . . . . . . 18. l5 k5++
. . . . . . . . . . . . . . . . . . . 19. g8 h9
a b c d e f g h i j k l m n o p q r sA 2008 variant of this concept is Triangle Quadrex:
Each turn, the player drops a tile of 2 of his own pieces and one opponent piece that are not in deadlock position.
Single pieces are added automatically as per quadrex rules.
If any cell is unplayable by regular tiles, it may be played with an overlapping tile, provided previous colours do not change.
Each turn, the player drops a mininmum-sized triangle of 2 of his own pieces and one opponent piece that are not in deadlock position.
Single pieces are added automatically as per quadrex rules.
If any cell is unplayable by regular tiles, it may be played with an overlapping tile, provided previous colours do not change.
A sample match:
a b c d e f g h i j k l m n o __Bxv______Joh___
x . . . x x . . . . . . . . . 1. c3 es b11 es
o o o o o x o . . . . . . . . 2. f10 en h12 ne+
. . o x o x . . . . . . . . . 3. c8 se+ e10 nw+
. x x x o x . . . . . . . . . 4. a9 en b6 se
o x o o o . . . . x x . . . . 5. a8 ne+ d6 nw
x x x x o x . . o x o o X . . 6. c7 ne f6 ws+
x o o . o . . . . x O O O . . 7. a5 en a1 se
x x . . . . . . . . o x x . . 8. c4 .. e1 sw+
o x o o o o x . . x o o x . . 9. g2 ws+ f4 en
. x x x x o x o o o o x x o . 10 l12 nw n12 nw+
. x o . . o o o x x x x o o . 11 i12 es i11 ne++-
. . o . . . x o o x . o o x . 12 n10 wn+ k5 ne
. . . . . . . . . x . . . . . 13 i6 es+ j9 en+
. . . . . . . . . . . . . . . 14 l9 ne m6 sw+
. . . . . . . . . . . . . . . 15 resigns
a b c d e f g h i j k l m n o