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The white rooks start on the squares a1 and h1, while the black rooks start on a8 and h8. The rook moves horizontally or vertically, through any number of unoccupied squares. The rook cannot jump over pieces. The rook may capture an enemy piece by moving to the square on which the enemy piece stands, removing it from play.
Black needs space to do this, which is why the king must move out of the way to the short side. There must be at least three files between Black's rook and the pawn, otherwise White's king can protect White's pawn while attacking Black's rook and gain time necessary to advance the pawn. 5. Re8. One try, to use the rook to block the checks from ...
If the black king emerges from the back rank, 1... Kd7, then 2. Qa4+ Kc7; 3. Qa7+ forces Black into a second-rank defense (defending king on an edge of the board and the rook on the adjacent rank or file) after 3... Rb7. This position is a standard win, as White heads for the Philidor position with a queen versus rook (in the next section). [5]
When the black rook takes a kingside pawn, switch the rook to guarding the pawn from the c-file, i.e. Rc7 then advance the pawn to a7. Switch the white rook to the a-file with gain of tempo. Thus Black is forced to sacrifice his rook for the pawn without White having to move his king all the way to a7. These many extra tempos make the ...
This demonstrates that the white king has not moved yet and that the rook on d4 must therefore be a promoted piece. Therefore, either the black king or black rook has previously moved to let the white rook off the back rank. Therefore Black cannot castle. After any move by Black, 2.Rd8 is mate. [43]
White's aim is to either promote his pawn or else compel Black to give up his rook for it – either result will leave White with an overwhelming material advantage and a straightforward win. White has managed to advance his pawn to the seventh rank, but it is prevented from queening because his own king is in the way.
This move signals White's Central Rook strategy. Since the rook has moved to the center, White can now start their castle development. 6. K-68 K-62, 7. K-78 K-72. After seeing White's rook movement, Black usually starts moving their king away from their rook and toward the king's castle position. White likewise mirrors Black's king movements.
Black now drops a pawn to put the king in check. This move tries to force White's rook to capture the pawn at 52 with White's rook (Rx52), which will allow Black to successfully promote their bishop at 63 and attack White's rook (Bx63). Kitao considers this position uncertain compared to the position in which the rook captures the tokin.