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April 28, 2018

Chess Thread 04-28-2018

20180428 chess pic.jpg

Easier Problem - Black To Play (569)

Hint: White is weak on the back rank

20180428 - Problem 1.jpg
kr1r4/8/8/8/8/b7/PBR5/1K6 b - - 0 1

The Dawn Prayer

(h/t (((G. Host))))

More Challenging Problem - White To Play (649)

Hint: Two advanced pawns > 1 rook

20180428 - Problem 2.jpg
5r2/8/4RbP1/5P1K/8/8/8/5k2 w - - 0 1

Dress Pr0n For the 'Ettes:

20180428 dress pr0n 01.jpg

20180428 dress pr0n 02.jpg

20180428 dress pr0n 03.jpg

20180428 dress pr0n 04.jpg


Solutions Update

Easier Problem - Black To Play

20180428 - Problem 1.jpg
kr1r4/8/8/8/8/b7/PBR5/1K6 b - - 0 1


Premature is 1...Rxb2+ because then 2.Rxb2 Rd1+ 3.Kc2

2.Rc1 Rxb2+
3.Ka1 Rxc1# mate in 3.

More Challenging Problem - White To Play

20180428 - Problem 2.jpg
5r2/8/4RbP1/5P1K/8/8/8/5k2 w - - 0 1

1.Rxf6 Rxf6

White must not be hasty with an immediate 2.g7 because 2...Rxf5+ 3.Kg6 Rf2 4.Kh6 Rh2+ 5.Kg6 Rg2+ 6.Kf7 Rxg7+ 7.Kxg7 and the win has slipped through his fingers.

3.f6 Rc5+
4.Kh6 Rf5
5.f7 Ke2
6.Kg7 Rc5

This is where the advantage of having two advanced pawns becomes appparent. White doesn't have to worry about avoiding pins or skewers because he's happy to trade a new queen for Black's last rook. And then he can queen his remaining pawn unopposed. Which is infinitely better than getting bogged down in a KQ vs. KR endgame.

7.f8=Q Rc1
8.Qe7+ Kf2
9.Kf8 Rc8+
10.Qe8 Rc3
11.g7 Rf3+
12.Qf7 Kg3
13.Qxf3+ Kxf3
14.g8=Q and wins

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 past 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 05:10 PM

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