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# The Secret Invisible Pass Chess

## Setup

Board 10x10

White Army:

p p p p p p p p p p / R N B F Q K F B N R / ...A(d1)..C(g1)...

Black Army:

p p p p p p p p p p / R N B F K Q F N B N R / ...C(d10)..A(g10).. ;

Pawns protection - 1 1 1 3 3 3 3 1 1 1

Opening setup is "central symmetry".

Figure 1. Central Symmetry Setup

## Pieces

Pieces - P (Pawn), R (Rook), B (Bishop), N (Knight), A (Archbishop), C (Chancellor), Q (Queen) and K (King) - wellknown pieces. The Fil (F) jumps two squares diagonally, straight horizontally or straight vertically and not obstructed by a piece on the jumped square. The Fils in this variants also has properties of the Bishops that can moves only on white or black squares. For example, from a1 to c1, c3, a3 and so on.

## Rules

The game follows the Standart Chess rules with exceptions. Castling like Capablanca Chess in the second ( 9th row for the black ) row and pawns may be promoted to Archbishop, Chancellor and Unicorn also.

1.On the board from both sides on squares e1,f1 and e10,f10 in there are special marks. These are the holes to the "secret invisible pass" (s.i.p.) connecting squares a1 and f10, f1 and e10. These are the special squares (s.s.) for transfer any own piece to the adversary`s rear.

2.Transfer of a piece through (s.i.p.) requares only one move. For example: The Rook (a1) can move through e1 to f10 if both (s.s.)are free or through f1 to e10. Ra1-e1-f10 or Ra1-f1-e10 (if squares b1,c1 and d1 are free, too), Re1 - f10 or Rf1 - e10 if the Rook is located on the squares e1 or f1.

3. A piece can return back the same way on a next move. The road (s.i.p) has two-way traffic.

4. If, after location transfering piece in any (s.s.), a King of adversary will be under the check, then a game will be proceed as usually and a King should be protected from the check.

5. Transfer of pieces through (s.i.p.) is unrestricted.

6. If, a Pawn will be promoted on (s.s.), it can be transfer (if it is necessary) to back and it will be considered as one move only.

7. Transfer of a piece may be only between squares e1-f10 and squares f1-e10, when they are free or one of them is free.

8. Pieces have "a freedom of choice" on (s.s.), they can be transfering or can standing on (s.s.).

9. If one of (s.s.)(for example, e1-f10)is closed, but another (s.s.) is open, then a piece can be transfer on a free (s.i.p.) only.

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