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Seirawan Chess

Seirawan Chess, also known as Sharper Chess, was created in 2007 by GM Yasser Seirawan and Bruce Harper. The motivation behind its creation was that Chess was becoming less challenging and less interesting at the higher levels of play due to being deeply analyzed, and the addition of new pieces would help stem this.

Setup

It starts out the same as Chess except that each player also starts with two pieces held in hand, one being the Elephant and the other being the Hawk. These two pieces are initially placed off-board and may be dropped onto the board on a later turn.

diagram

Pieces

The pieces are the same as Chess except for the two new pieces. Like the Queen, each new piece is a compound of two other pieces, capable of moving as either one.

Elephant

The Elephant can move as a Rook or a Knight. The same piece is also commonly known by the names of Empress, Chancellor, and Marshall.

diagram

Hawk

The Hawk can move as a Bishop or a Knight. The same piece is also commonly known by the names of Princess, Archbishop, and Cardinal.

diagram

Rules

Seirawan Chess is played just like Chess with the following exceptions:

Each time that a player moves a piece other than a Pawn for the first time, he may immediately on the same turn drop his Hawk or Elephant into the vacated space if it has not yet been dropped onto the board.
When castling, a player may still drop only one piece after the move, though he now has the option of dropping it on the King's vacated space or the Rook's.
In addition to its usual promotion options, a Pawn may also promote to an Elephant or a Hawk when reaching the last rank.

As a consequence of these rules, a player has no more than eight opportunities to drop the extra pieces onto the board. If he fails to make use of these opportunities, the pieces will remain out of play for the rest of the game.

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