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To follow some of these puzzles and to record your own
games, or play though games played by others, you need to understand chess
notation. This is very easy to do (you only need to know the alphabet and be
able to count up to 8) and is briefly described in the
Chess Notation page .

For previous Archived Problem Pages click to go to
bottom of page
Problem Page 4 May 2012
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How well do you know the Laws of Chess? |
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This month’s teaser :
En passant |
| 1. En passant (abbreviated in
chess notation as e.p.) is an
optional move when a pawn of one player is on the 5th rank (so
has moved 3 squares from the start) and the opponent moves the
pawn from the second rank of an adjacent file for the first time
by two squares (so the 2 pawns would be alongside each other).
The first player can (as an option) take the other pawn
as if it had only moved 1 square. See Figure 1. Please note this
move must be played straight away.
So if White to move and plays
1. g4 then Black can play in reply
1.... fxg3 e.p
If Black to play tries
1.a5 then White can reply
1.....bxh6 e.p
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En passant problems |
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Look at the adjacent board
position
Black to plays moves
a) 1.... a5 can White take this pawn en passant (so bxa6 e.p.)?
If instead Black tries
1.... c5 can White play
b) 2.bxc6 e.p. or
c) 2. dxc6 e.p.
If instead White to play
and tries
d) 1. h4 can Black play gxh3 e.p.?
If instead White
tries
1. f4 can Black reply
e).... exf3 e.p.? or
f)' ... gxf3 e.p.
ANSWERS can be found here
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For Beginners! |
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Many beginners often obtain a winning position e.g. a Q ahead
but do not know how to give checkmate. The first thing to
remember is that you cannot checkmate with just a Q versus a K,
you need to use your K and Q together. The second point is you
need to drive ('squeeze') the opponent's K to the edge of the
board (use the Q to prevent the K from coming away from the edge
and then try and move the K to the position shown above.
With White to move there are 4 checkmates possible - can you
find them all?
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As with the example
on the left when you checkmate with K and R versus a lone K then
the K and R must work together to first drive the enemy K to the
edge of the board and then use the R to pin the K to the edge
and move your own K to the position shown. Sometimes you have to
'lose' move e.g. by moving the R a few squares to drive the
opponent's K to move opposite your K.
So with Black to move there
is just one move to deliver checkmate. |
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Answer
The
checkmates are
1. Qc2#
1. Qh1#
1. Qg1#
1. Qf1#
Note the
last 3 are very similar in idea
TIP:
when your opponent can
only move his/her K be careful to avoid a position where he/her
is not in check but his/her only moves would be into check. If
you only have a K left this is a trick worth trying as you may
convert a loss to a draw!
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Answer
The only
checkmate is
1. Rh2#
You will
see this is a similar situation to the last 3 checkmates shown
for the Q in the position on the left.
TIP: Practice giving these
checks - start by putting the other K on the mioddle of the
board and then driving it to the edge and setting up the right
position to give checkmate. This is important as there is
nothing worse than winning against your opponent but not being
able to give checkmate and having to agree a draw!
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This
month's problems -
Novice |
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| Problem N7 |
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Problem N8 |
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N7)
White to play - what is the winning move? |
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N8)
Black is winning easily here - but what is the quickest move to
finish the game? |
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N7)
If it were Black to move how would he/she win the game? |
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This
month's problems -
Intermediate |
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Problem I7
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Problem I8 |
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I7) Black has just played the R from c6 to c5, thinking he will
win either the Q or B with the pin. White finds a stunning reply
that wins within a few moves – what did White play? |
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I8)
How does Black win? |
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| Solution to last month's problems -
Novice |
| Problem N5 |
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Problem N6 |
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N5a. Black to play what is the best
move? |
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N6a. Black
to play what is the winning move? |
1....f4+
then
2 gxf4 exf4+
3 Kxf4 draw as K+N alone cannot checkmate a lone K! |
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1....h4 as
this pawn reaches h1 (and becomes a Q) just before the White pawn
reaches a8 with this square then covered by the new Black Q which
will take the promoted pawn.
This is a case of counting squares (to promotion) and checking what
squares are attacked on promotion. |
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N5b. White to play and win! |
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N6a. White
to move and win |
1. Kf3 so that if plays tries the reply
1..... f4
White replies
2. g4 and the combination of K and N can then
capture the Black pawns and shepherd the g pawn to promotion as a Q or R.
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1.a5 as this pawn
reaches a8 (and becomes a Q) just before the Black pawn reaches h1
with this square then covered by the new White Q which will take the
promoted pawn.
TIP: LEARN TO COUNT SQUARES IN THE ENDGAME WHEN
PAWNS ARE RACING TO PROMOTE. |
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| Answer to last month's problems -
Intermediate |
| Problem I5 |
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Problem I6 |
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I5a.
A closely fought game with each side
down to one P each.
So it is White
to play – is 1. a6 the best move? If not what should White play? |
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I6a. What is
Black's killer move? |
1. a6 is not
the best move because although the a pawn is promoted (to a Q) first
when the Black pawn reaches h1 the new Black Q will give check in a
skewer and then win the new White Q and the game!
White K can reach g2 and take the Black pawn when it promotes. Black
cannot catch the white pawn. So
1. Ke4 wins - if Black pushes the h pawn the White K moves to f3 (and g2
if necessary). If Black moves the K instead then the a pawn is just
advanced. |
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1.....Rxg3+
If
2. fxg3 f2#
While
2. Ng2 Qxg2# |
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N5b.
If Black to
play first can he/she draw or win the game? |
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1....h3 wins for Black as the skewer along the
h1-a8 diagonal following promotion to a Q will cover a8 and prevent White from
gaining (or keeping) a Q |
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Answers to
En Passant Problems
a) No - the Black a pawn
was not on its original square so has not moved forward 2 squares in one
move.
b) Yes
c) Yes
d) No - although en passant could normally be played this would leave the
Black K in check
e) Yes
f) No - again an en passant take would put the Black K in check.
Remember: You do not have to take
en passant. If you do it must be the very next move after your opponent moves
his/her pawn forward 2 spaces.
Previous CHESS PROBLEMS pages
Problem Page 1 February 2012
Problem Page
2 March 2012
Problem Page
3 April 2012
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