### Rotation Chess

"or, How to spin around the board!"

Well, this one is simple: don't change the rules, don't change the pieces, don't even change the board, just spin it!

### (Counter)Clockwise Rotation Chess

1. All FIDE rules apply except in the following:
2. Every two moves, the board rotates 90 degrees (counter)clockwise. The pieces moving direction doesn't rotate with the board.
3. ```   Eg,

r . b q k b n r      r p . . . . O R       R Q B K Q B N R
p p p p p p p p      . p . . . . O .       O . O O . O O O    \/
. . n . . . . .      b p n . . N O B       . . N . . . . .   black
. . . . . . . .      k p . . . . O K       . . . . O . . .
. . . O . . . .  =>  q p . . O . . Q   =>  . . . . . . . .
. . . . . . . .      b p n . . . O B       . . n . . n . .   white
O O O . O O O O      . p . . . . O N       p p p p p p . p    /\
R N B Q K B N R      r p . . . . O R       r . b k q b q r

1. d4 Nc6  2. Nc3 Nf6  3. g1=Q b1=Q ...```

note: Only pawns behave differently with respect to the board. All the other pieces are invariant to rotation. So a convenient way to play is to keep the board fixed and to show how the pawns move with the help of some rotating arrow. There is no notion of check, checkmate and stalemate. The winner is the player who captures the opponent's king.

Sample Game

Benjamin Good - Joćo Neto

1.Nf3  Nf6     13.N:e5  d:e5    25.e:d3   Rg8
2.Nc3  Nc6    14.Bg2   e:f4     26.Qa:c8+ Q:c8
3.b1=Q b8=Q   15.b1=Q  c8=Q     27.Q:c8+  Kf7
4.ab2  Qb6    16.N:c8  R:a1     28.R:h7+  Kg6

5.Qa2  Qd4    17.Q:a1  B:c8     29.Qh5#
6.Nb5  Q:f2   18.b2    Bg7
7.K:f2 Ng4+   19.Qa8   f8=Q
8.Ke1  d6     20.Bc6   Qge6

9.Qc4  Qd7    21.B:d7  Q:b7
10.Qf4  Bb7   22.g2    B:b2
11.g1=Q g8=Q  23.B:b2  Ne5
12.N:a7 Nce5  24.Qc5   Nd3+

a   b   c    d   e   f   g   h
+---+---+---+---+---+---+---+---+     Black (joao)
8 |   |:::| Q |:::|   |*Q*|*R*|:::|  8
+---+---+---+---+---+---+---+---+
7 |:::|   |:::|   |*P*|   |:::| R |   7
+---+---+---+---+---+---+---+---+
6 |   |:::|   |:::|   |:::|*K*|:::|   6
+---+---+---+---+---+---+---+---+
5 |:::|   |:::|   |:::|   |:::| Q |   5
+---+---+---+---+---+---+---+---+       TURN: 1n 2n 3n 4n
4 |   |:::|   |:::|   |*P*|    |:::|  4  black:  S ->  N <-
+---+---+---+---+---+---+---+---+      white:  N <-  S ->
3 |:::|   |:::| P |:::|   |:::|   |   3
+---+---+---+---+---+---+---+---+
2 |   |:B:|   |:P:|   |:::| P |:::|   2
+---+---+---+---+---+---+---+---+
1 |:::|   |:::|   |:K:|   |:::|    |  1
+---+---+---+---+---+---+---+---+     White (ben)
a   b   c    d   e   f   g   h