Page 23 - Learning Chess Workbook Step 5

Discovered attack

A double attack can be set up with the help of five different types of preparatory move:
• luring • eliminating the defender • aiming
• chasing • clearing
The same types of preparatory move can be used to prepare a discovered attack. As you will probably
recall, a discovered attack requires the presence of a battery. In some positions, the battery may not yet
be effective or must first be set up. This is where the preparatory move comes in .

.I .i.'¥lH
.i. ii i�i
.Ii �i
..t
ltJ
� � �
�W/i �
� �

This position does not contain The battery Rd IIBd3 is in The battery on the d-file does
a battery yet. White sets up a place. It is as yet ineffective, not yet work, since the rook is
lethal battery with l . Qf2+. since 1. Bxg6 Qxg6 does not obstructed by two of White's
The target piece (the queen give White anything. White pieces. White needs to play
on d4) is already in place. It must therefore chase away the two clearing moves. The best
does not matter how Black knight on g6 with 1. h5. The method is 1. Bxb7 Bxb7 2.
gets out of check. On the next knight is lost. If it moves Nf5+, winning the queen.
move White gives check with away, White will unleash the
the rook and then picks up the battery with 2. Bh7+. Preparatory move: clearing
queen. Preparatory move:
Preparatory move: aiming eliminating the defence

.I � .I I. • !.
ii .i. i.i ii .t. i
�i � i �
..tltJi
� ltJ
�
� ��
1d 1d �

The battery on the c-file lacks The battery Bb3/Nc4 lacks an This position concludes our
an attacking target. White can attacking target. The front overview of preparatory
lure the queen into the rook's piece (the knight) can give moves. The back piece (Bb3)
range with 1. Nc7, the point check. What is needed is a and the f r ont piece (Rc4) are
being that l . ... Qxc7 is met by target f o r the back piece. We both ready. The back piece
2. Bf8+. If Black does not can find one by chasing the has an obvious target (Qf7).
take the knight, then White rook to g8; White wins the But what about the target of
will win the exchange. exchange after 1. Bg7 Rg8 2. the rook? Is it the king? No.
Preparatory move: luring Nd6+. Material? No. A square? Yes!
Preparatory move: chasing It is mate after 1. Rh4 Qe7 2.
Rxh7+ Kxh7 3. Qh4#.

20 Fifth step