Talk:Chess/Tactics Exercises
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[edit] More the Better
The more positions we have the better. I put a few up that may not be very good but if we can put a lot up and if people are always adding more it would be very useful for all chess players. We can later organize them when we have more, like by difficulty or by theme, like discoveries in one section and so on. Tprev 19:00, 14 May 2007 (UTC)
number 1 is wrong: after d5 ... Bxc3+ bxc3 Ne7 and now the check at a4 would be harmless
Added and amended position 1 so that 1. d5 with a possible Qa4+ picking up the Bishop on b4 can now work. E5ricky 19:48, 27 October 2007 (UTC)
[edit] 99% tactics?
I am by no means an expert, but this statement ("Chess is 99% Tactics") just seems to subjective and vague to feature. 84.1.190.175 22:51, 30 July 2007 (UTC)
-
- Where does it say it's 99% tactical? E5ricky 19:14, 27 October 2007 (UTC)
[edit] Upside down
Positions 13/14 and 15 are upside down. Position require reversing. Done E5ricky 22:09, 27 October 2007 (UTC)
[edit] Section "A Highly Tactical Position"
This has been completely removed twice now by 209.146.241.93. I see no reason to delete it. If this person wishes to take time to submit anything of better quality to replace it, then fine, but until such time as we have something better then it's of value to stay. E5ricky 19:48, 28 October 2007 (UTC)
[edit] Exercise #2
I'm a rank amateur, but that also means I'm the intended audience of this section so I feel justified in speaking up. :) In exercise #2, if White plays 1. Rxd7+ , what's to stop Black from playing 1...Kc8 to avoid the check and temporarily neutralize the White queen without losing any (further) pieces? --Orzechowskid (talk) 22:22, 23 February 2008 (UTC)
With Gnuchess vs Gnuchess, white did win after 18. move, began as you described. --80.222.84.35 (talk) 14:23, 24 May 2008 (UTC)
[edit] Exercise #3
A different person here but nonetheless an amateur. On exercise #3 what's to stop black from moving his pawn forward from C7 to C5 , thus blocking checkmate. —The preceding unsigned comment was added by 81.76.53.87 (talk • contribs) 18:44, 14 March 2009 .
- It's White to move and Black is forced to respond to check and hence never gets a chance to play pawn c7 to c5. SunCreator (talk) 20:01, 14 March 2009 (UTC)
A different person yet. I have to disagree with SunCreator's response. Yes, it is white to move. But the succession would go:
1.Rf8+ Rxf8
2.Rxf8+ Ka7
3.Bxe3 and THEN 3... c5.
What prevents this is that white's pawn on d5 is passed "en passant" and can therefore take black's pawn. But black still has the pawn on the b-file that can better block the bishop's check to begin with. Thus the King escapes checkmate. But white still gains a material advantage.
[edit] Exercise #4
I really have to disagree with the logic in exercise 4. Given that the Queen moves to f4, I cannot see black moving his eFile knight to d7! A much more probable move would be moving that same knight to g6, thus threatening white's queen.
Were I white faced with the situation given in Ex 4, (I am a base amateur), I would move my rook to f5 with the hope of backing it up with the other rook to f1 in the next move.
I disagree as well, I would move my queen to h4, then bishop to f6 which forks the black queen and rook, (if e Knight is now protecting f knight, just threaten e Knight with other bishop).
[edit] Exercise #9
I guess I really have to play the contrarian with you. In this case, your computer was correct. I also initially saw the strategy you did. But that approach allows the king to escape checkmate. The following sequence from that on the board:
1.Rh7+ Kg8
2.Rcg7+ Kf8
3.Bd6+
This was your strategy. Now you see the next move on the part of the e8 rook:
3... Re7 then:
4.Bxe7+ Ke8 Now, it can be either rook, but I'll select the h7
5.Rh8+ Kd7
and from there the King is able to slip away into pawn protection.
This doesn't happen with the computer version.
- 5.Bd6 --79.216.228.177 (talk) 13:41, 17 September 2009 (UTC)
[edit] Exercise #18
You don't seem to consider this possibility:
1.Qh5+ Ke6
2.Re3+ Kd7
and now white's rook has to consider the threat imposed by black's rook on e8. Certainly changes the game and undermines white's checkmate strategy. Variations of white's response to 1...Ke6 results in the same escape.
[edit] FEN notation for the puzzles
As people may want to analyse/play out these puzzles via their favourite chess program, here are the puzzles in FEN notation:
r2qk2r/pbp2ppp/1pnp1n2/8/1bPP4/2N2N2/PP2BPPP/R1BQ1RK1 w kq - 0 1 r2k1b1r/2pn1Bpp/pp2Qn2/4p3/4P3/8/PPP2PPP/3RK2R w K - 0 1 1k5r/1pp5/p2p4/3P2B1/5R1P/4n3/PPP3r1/1K3R2 w - - 0 1 1k5r/1pp1qp2/p2r1n2/4n1Bp/2PpP3/P2P2QP/P3B1P1/R4RK1 w - - 0 1 r4rk1/pp4p1/2p2pp1/2P1Nq2/1P1P4/2K1P3/P7/R2Q4 w - - 0 1 4r1k1/1p1r1pp1/p3b3/2pp2BN/8/5PP1/P1N2KB1/R6R w - - 0 1 r1bq1r1k/1p4p1/p2pP1p1/2b5/2Q1PP2/NP3R2/PB4PP/R6K w - - 0 1 4Qrk1/1p4p1/p2p2p1/2b5/4P3/NPB4R/P5PP/R6K w - - 0 1 4r2k/2R3R1/1p3p2/2pp1p1p/p4B2/7P/PP4PK/4r3 w - - 0 1 r1b2rk1/ppp1n1pp/8/3Pp2q/N1P1P1n1/6bP/PP4B1/R1BQ1R1K w - - 0 1 r3rk2/p1pq1p1p/n2p2pN/1p1Pb1BN/2n5/5Q2/PP3PPP/R4RK1 w - - 0 1 2r3k1/b5pp/p2N4/1p1N3q/1P4b1/3QP3/1PP3PP/5RK1 w - - 0 1 r2r2k1/1p2bppp/4q3/p3n3/5P2/N1PbP1Q1/1B4PP/R3K2R b K - 0 1 1k1r2r1/p1p4p/1p6/1Q2p3/P4b2/2P3Bq/1P3P1P/R3R1K1 b - - 0 1 r3k2r/p1p3p1/1p1q1p1p/3bN3/5R1Q/BP2b3/K1P3PP/3R4 b kq - 0 1 1rr1n1k1/4p2p/p2p2p1/qp1P2P1/3b4/P2BQP2/1PP5/2KR3R w - - 0 1 5rk1/r6p/p3P1p1/1p2R3/4n2P/2P4B/PP6/1K4R1 b - - 0 1 r3rq2/ppp2kbp/3p4/5pB1/6P1/3R4/PPP4Q/2K4R w - - 0 1 4r3/pppn1pk1/7R/3Pr3/2PQ3N/7P/PP3P2/5K2 w - - 0 1
I'm not sure if I got all the castles right, also in one puzzle there might be an en passant possibility. The moves I just set to "0 1" in everyone. If that's cool with everyone I'll edit these into the page.
Also, if anyone cares, here's a little perl script to get FEN notation out of the wikipedia diagrams:
#!/usr/bin/env perl
use strict;
use warnings;
# takes a board in this format:
#
# 8 |rd|nd|bd|qd|kd|bd|nd|rd|=
# 7 |pd|pd|pd|pd|pd|pd|pd|pd|=
# 6 | | | | | | | | |=
# 5 | | | | | | | | |=
# 4 | | | | | | | | |=
# 3 | | | | | | | | |=
# 2 |pl|pl|pl|pl|pl|pl|pl|pl|=
# 1 |rl|nl|bl|ql|kl|bl|nl|rl|=
#
# and turnes it into FEN notation.
my %trans = (
qd => 'q',
kd => 'k',
rd => 'r',
nd => 'n',
bd => 'b',
pd => 'p',
ql => 'Q',
kl => 'K',
rl => 'R',
nl => 'N',
bl => 'B',
pl => 'P',
);
my ($FEN, $blanks);
while (my $line = <>) {
$blanks = 0;
chomp $line;
$line =~ s/^\s* \d \s+ [|]//x;
$line =~ s/[|]= \s*//x;
# now the lines look like: "rd|nd|bd ... nd|rd"
for my $piece (split /[|]/, $line) {
if ($piece eq q{ }) {
$blanks++;
}
else {
if ($blanks) {
$FEN .= $blanks;
$blanks = 0;
}
$FEN .= $trans{$piece};
}
}
if ($blanks) {
$FEN .= $blanks;
}
$FEN .= '/';
}
$FEN =~ s{/$}{};
print $FEN;
Though this is probably a stupid place to post this, I'm sorry.
