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September 15, 2018
Chess Thread 09-15-2018Note on Problems A white back, after some discussion, I decided to just present the problems as "White|Black to Play" and leave it up to you to figure out the best course of action. Well, I received a mild complaint last week on the MCP because the best course of action was a draw, and that's kind of a difficult evaluation to make. Because even though you may see the draw, how do you know for certain that there's not a win that you've overlooked? So based on that, I've added a "Goal" to each problem that's normally hidden, but you can view if you swipe the blank area with your mouse. We'll see how that works. As always, the chess/dress pr0n thread is an open thread, so there is no such thing as an off-topic comment. Easier Problem - White To Play (782) Goal: There's a mate-in-2 here for you to find. ![]() 8/4P2P/6k1/8/5K2/8/8/8 w - - 0 1 Oh Capablanca Neat song about chess: People have asked whether she's singing about an actual game played by Capablanca. I have no idea. (h/t 'Off the reservation')
Find a winning line for White. Don't settle for a draw. This is a complicated position. The more I looked into it, the more I saw, and the decision tree expanded like kudzu. I have found two solutions (i.e. two completely different first moves by White) and so thefore there could be more. Coming up with a hint was hard, so I broke up the goal into two parts and hopefully you'll be able to get an idea how to solve this one: Goal 1: Get the pawn safely to the queening square Hint: Force Black to trade off his queen while avoiding his threats of perpetual check ![]() 6K1/5PR1/3R4/4k3/8/8/q7/8 w - - 0 1
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Solutions Update Easier Problem - White To Play ![]() 8/4P2P/6k1/8/5K2/8/8/8 w - - 0 1 1.h8=Q Kf7 That was the only legal move for Black. 2.e8Q# Kaboom! More Challenging Problem - White To Play ![]() 6K1/5PR1/3R4/4k3/8/8/q7/8 w - - 0 1 So White's strategic goals are: For Black: One set of solutions starts out with the move 1.Rd5+ If Black responds with 1...Qxd5 then it's an easy win: 2.Rg5+ Ke6 3.Rxd5 Kxd5 4.f8Q However, if black chooses 1...Kxd5 with the idea to get a draw through endless perpetual checks, then 2.f8=Q Kd4+ And this check is what White has been trying to get to force the exchange. 9...Kc5 If Black instead moves 2...Ke4+ then White's maneuvering is similar: 3.Qf7 Qa8+ Another solution begins with 1.Ra6: 1. Ra6 Qxa6 A solution is: 1.Rgg6 Qb3 Black's queen needs to stay on that diagonal. 2.Rde6+ Qxe6 Otherwise, the pawn queens. 3.Rxe6+ Kxe6 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.
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