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September 22, 2018

Chess Thread 09-22-2018

chess pic 20180922.jpg

Pic Note:

So, if I'm seeing this photo correctly, here is a very relaxed chess hustler who is offering passersby the chance to play a game against him (probably have to give him a few bucks for the privilege). He'll let you play White, but you have to give him rook odds. Either that, or he's too cheap to buy a new set after he's lost one of the pieces.

As always, the chess/dress pr0n thread is an open thread, so there is no such thing as an off-topic comment.

Easier Problem - Black To Play (Ch. 4200)

Goal: Black can force a mate in 3 moves
Hint: Offer a piece to deflect an obstructing defender

20180922 - Problem 1.jpg
r4rk1/pp3p2/3P2pp/Q1P1qp2/N2b4/4nP2/PP2B2P/2R1R2K b - - 0 1

More Challenging Problem - White To Play (785)

Goal: White can force Black to choose between losing a boatload of material, or being checkmated
Hint: Black's powerful, centralized bishop is a problem.

20180922 - Problem 2.jpg
q3r1k1/r7/pp1p1p2/6pQ/P2Nb1R1/7R/1P4PP/6K1 w - - 0 1

Dress Pr0n For The 'Ettes:

20180922 dress pr0n 01.jpg

20180922 dress pr0n 02.jpg

20180922 dress pr0n 03.jpg

20180922 dress pr0n 04.jpg
Greetings from Bosnia

20180922 dress pr0n 05.jpg


Solutions Update

Easier Problem - Black To Play

20180922 - Problem 1.jpg
r4rk1/pp3p2/3P2pp/Q1P1qp2/N2b4/4nP2/PP2B2P/2R1R2K b - - 0 1


Black threatens Qxh2#

2.fxg4 Qe4+
3.Bf3 Qxf3#

There is one other line wherein White ignores the knight sac and tries to block the queen, but it fails in exactly the same way:

2.f4 Qe4+
3.Bf3 Qxf3#

More Challenging Problem - White To Play

20180922 - Problem 2.jpg
q3r1k1/r7/pp1p1p2/6pQ/P2Nb1R1/7R/1P4PP/6K1 w - - 0 1

The decision tree for this is quite complicated, but it starts out with

1. Rxe4!

What's the point of this move? With the elimination of the bishop, White is threatening a mating attack. To see this, pretend Black is oblivious, and moves, say, 1...a5. And now White mops up quickly with

2.Rxe8+ Qxe8
3.Qxe8+ Kg7

So Black has to try to come up with a better solution. There are several plausible Black replies. He could recapture with his rook, but that leads to mate:

1... Rxe4
2.Qh8+ Kf7
3.Rh7+ Kg6
4.Rh6+ Kf7
5.Qxf6+ Ke8
6.Rh8+ Kd7
7.Rh7+ Re7 ( or 7...Kc8 8.Qf8+ Re8 9.Qxe8#)
8.Qxe7+ Kc8

Or Black could try a desperation counterattack, 1...Rh7, but then

2.Qxh7+ Kf8
3.Qh8+ Kf7
4.Rh7+ Kg6

The last alternative is to recapture with the queen, 1...Qxe4, which brings about:

2.Qh8+ Kf7
3.Rh7+ Qxh7 (not 3...Kg6? 4.Rh6+ Kf7 5.Qxf6+ Kg8 6.Rh8#)
4.Qxh7+ Kf8

Not out-and-out mate, but White has such a material advantage that Black should just resign.

Hope to see you all next week!


Note: that cryptic line of letters and numbers you see underneath each board diagram is a representation of the position in what is known as "Forsyth-Edwards Notation", or F.E.N. It's actually readable by humans. Most computer applications nowadays can read FEN, so those of you who may want to study the position, you can copy the line of FEN and paste into your chess app and it should automatically recreate the position on its display board. Or, Windows users can just "triple click" on it and the entire line will be highlighted so you can copy and paste it into your chess app.


So that about wraps it up for this week. Chess thread tips, suggestions, bribes, rumors, threats, and insults may be sent to my yahoo address: OregonMuse little-a-in-a-circle yahoo dott com.

digg this
posted by OregonMuse at 05:15 PM

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