FRAGILE WEAPON CHESS

  1. The FIDE rules apply, except:
  2. Captures by machine-gun or grenade, at mover's choice.
     (A moving piece need not make captures that are available, but any made must include all multiple hits of that type.)
     Machine gun means capturing all pieces on capture range without moving and grenade means capturing all adjacent pieces after the piece move.
  3. Capture REDUCES the capturing piece by a rank: Q>R>B>N>P
     Pawns that capture are thus removed.
     Kings capture without reduction of power.
  4. Win by killing king.
  5. Castling legal when pieces have not moved.

r . . . k . n r     |  1. e4     d5:
p p p . p p . p     |  2. Bd3    g6
. . n . . . . .     |  3. b4     Bg7
. . . . . . . .     |  4. c3     Bg4:
. . . . . . . .     |  5. Bf5::  Qd3::::
. . . . . . . .     |  6. Bd2:   Bc3:::
O . . K . O O O     |  7. Kd2:   Nc6
. . . . . . N R     |  8. resign

WEITUWEIQI (a game sample)

Oshiqi mechanics with both players playing "x"s. Chicken start.
Moves are mandatory, and if the game ends by stalemate then
the winner is determined by whether the boundary has been reached.
Any boundary hit is a win for an ESCAPER, otherwise BLOCKER wins.

Unlur or "chicken" starting:-  both sides play moves as ESCAPERS.
If at any time a player feels a blocker is now certain to win,
he announces "I Block!", but does not make a move. The other player
remains the sole escaper and plays the first move in regular alternation.

Note: If, still on the first phase, a player makes a stalemate position
he loses, (opponent chooses "block" and stalemater cannot continue).

Game sample
                             B    J
abcdefghijklmnopqrstu       ----------
     . . . x . .        1.  i6    s6
    . . . x . . .       2.  j5e   q6
   . . . . . x x .      3.  j7n   l1
  . x . . . . . . .     4.  p3    k2
 . . . x x . . . . .    5.  q8    o8
. . . . x . . . x x .   6.  n3!  block
 . . . O x . . . . .    7.  h5se  p11
  . . . : . . x x .     8.  p9    g10
   . . . X . . x .      9.  l11   e4
    . x . . . . .      10.  j9    l9 (forced)
     . . . x . x       11.  i2   1-0
abcdefghijklmnopqrstu

7x9 CHICKEN HEX (a quick game sample)

Players always drop isolated stones (ie, not adjacent to another) in the negotiation phase (in the diagram: x diagonal, o horizontal)

0: B d4, f2, d2, b2, f8, g9, a1, J takes x

x . . . . . .          1.  d6      a7?
 . x . x . x .         2.  c6      f5!
  . . . . . . .        3.  resigns
   . . . x . . .       4  
    . . . . . x .      5
     . . o o . . .     6  
      x . . . . . .    7
       . . . . . x .   8
        . . . . . . x  9
         a b c d e f g

SUICIDE BOMBER CHESS (a game sample)

Moves are only to empty squares, after which all opponent pieces
kingwise adjacent to the new position are destroyed; and if there are
any of those, the moving piece is also destroyed. Win by killing the
king (the "Osama"), who may not suicide. Castling is permissible
whenever the two pieces have not previously moved.

r . . . k . . r     |  1. Nc3   b5      10. Nd4   Nb4:
p . . . . p p p     |  2. a4:   Bb7     11. Rf2   c5:
. . . . . . . .     |  3. e4    e5:     12. Kf1   Qd1::
. . . . . . . .     |  4. Qe2+  Bf3:::  13. resign
. . . . . . . .     |  5. Bh3   Bb4:  
. . . . . . . .     |  6. Ne2   Nh6
. O : . . R . O     |  7. Rf1   Ng4:  
. . : . . K . .

Lovely 4 HexGomoku

Gomoku rules on hex board but each player must also drop an enemy stone as
close as possible to his own dropped stone. Wins by making a 4 in-a-row.

Game sample:

  ___oooo________xxxx___
1.  l25 n25     m24 o24
2.  o26 p27     k22 j21
3.  l23 k24     i24 j25
4.  g24 e24     h25 i26
5.  j23 h23     g22 i22
6.  f21 e20     f23 d23
7.  resigns

abcdefghijklmnopqrstuvwxyz

 . . . . . . . . . . . . . 19
. . x . . . . . . . . . .  20
 . . o . o . . . . . . . . 21
. . . x o x . . . . . . .  22
 . o x x o o . . . . . . . 23
. . x o x x x o . . . . .  24
 . . . x o o x . . . . . . 25
. . . . o . . o . . . . .  26
 . . . . . . . x . . . . . 27
. . . . . . . . . . . . .  28
 . . . . . . . . . . . . . 29

abcdefghijklmnopqrstuvwxyz

This variant, played on a hex board, has less directions to win (6 instead of the 8 on a square board) and that provides a better game, since on the square version it's much easier to win.

On the other hand, playing 5 in-a-row with the Love mutator seems very hard to force a win. The game tends to prolong itself without a final outcome.

134* TRICOLEUR HEXXAGON

Rules like Ataxx in a hex board (like Hexxagon, except:

There are three colors: A,B and C. A flips B which flips C which flips A (flips means the enemy piece becomes just like the moved piece, just like Ataxx). Also, a piece captures enemy pieces of the same type (ie, removes them from board).

Initial setup:

abcdefghijklmnopqrstuvwxyzABCDEFG
        A . . . b . . . c           1
       . . . . . . . . . .          2  
      . . . . . . . . . . .         3
     . . . . . . . . . . . .        4
    B . . . C . . . a . . . A       5
   . . . . . . . . . . . . . .      6
  . . . . . . . . . . . . . . .     7
 . . . . . . . ___ . . . . . . .    8
c . . . b . . /   \ . . B . . . C   9
 . . . . . . .\___/. . . . . . .   10
  . . . . . . . . . . . . . . .    11
   . . . . . . . . . . . . . .     12
    a . . . A . . . c . . . b      13
     . . . . . . . . . . . .       14
      . . . . . . . . . . .        15
       . . . . . . . . . .         16
        C . . . B . . . a          17
abcdefghijklmnopqrstuvwxyzABCDEFG

A player wins the game by eliminating one enemy color.

---

Game sample (abc even turns, ABC odd turns):

 1. k13                           abc ABC
 2. u13q13  w17     e13i13      
 3. j16     k13     q17m17 k1       9-12
 4. q1t2    j8      v6     D12     12-12
 5. m13k11  k15     m5p6   G9D8    12-13
 6. i9k7    j8l6    v6v8   s3      13-13
 7. l10     l14     B6     p6s5    12-17
 8. t2p2    t4      C11    w9      16-14
 9. l14p14  D8z8    l10l8  f4      13-17
10. t4x4    p2l2    w17u15 C11A9   16-15
11. b6b8    j6      n16    g3      13-21
12. x4A5    j2      y9w11  y9      17-17
13. B8x8    g3k3    l6o5   o15     12-19
14. s3q5    c9      A5y7   z16     16-18
15. o15s15  l2n4    k13o13 e5e7    14-20
16. C13z14  v12     z16B14 x2      16-20
17. u15x16  o5r6    o13s13 e7b8    12-24
18. x8v10   w3      v12x10 z14z16  15-22
19. s13u11  q13s11  r6u7   k11n12  14-23
20. x10t10  v10v12  x4     D12A11  17-20
21. p14s13  n12p14  u7u9   k7o7    16-20
22. v12t14  u11r12  w11s11 y5      17-20
23. t12     u9x8    o17    o7s7    14-24
24. y5w7    r14     x16t16 y17u17  16-21
25. s13s15  n16-n14 u7     v12     11-26
26. u17u15  y15     C5z6   C11     13-24
27. u7u9    t12v14  v12x14 w7y5    10-25
28. z16w15  z6z4    D10    z14     14-21
29. u9y9    r14v14  o17r16 s5      13-22
30. w3t4    B14B12  x14    x6      16-20
31. y9B10   r16t14  s5     s11u9   11-24
32. resigns

Final Position:

abcdefghijklmnopqrstuvwxyzABCDEFG
        c c . . . . . . b          1
       . B . . . . . . b .         2
      . . B . . . . . . . .        3
     B . . . B . . : . c c .       4
    . . . . . . B B . . c . .      5
   . . . A . . . . . . c . . .     6
  . . . . . . . . A . . . . . .    7
 B . . . . A . ___ . . . . . . .   8
B B . . . . . /   \ B . . . . . .  9
 . . . . . . .\___/. . . . A A .  10
  . . . . . . . . . . . . A A .   11
   . . . . . . . B . . . . a .    12
    . . . . . . . . . . . . .     13
     . . . . C . . C C a a .      14
      . . B . . . . . . . .       15
       . B . . . . . . . .        16
        B . C . . . . . .         17
abcdefghijklmnopqrstuvwxyzABCDEFG

This is a remarkable game, with lots of strategic planning in order to achieve local victories based on the deployment of its different units. An army configuration can be strong in one sector and vulnarable in another.