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6K1/4k1P1/8/8/8/8/7r/5R2 - - 0 1
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White to win by building a bridge Re1+ making the black K to move over then Re4!.....then K zigs then zags until Kg5 then Rg4
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Thankyou JungJoe
I am especially interested in how often you(the QA community uses these positions in thier play. I think I have used both in over the board play atleast once. I use them frequently in my endgame practice. But my recent endgame practice has yet to pay dividends in over the board play. However, I have not been playing very many over the board games lately. So it is too soon to evaluate the impact of these positions on my play.
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Great question phystutordotcom. I bet the number will be very low. I have never played the position, but that could be because I did not know about it until just recently. I wonder if I could recognize the possibilities of going into the position, once the endgame begins (see my comment on when endgame begins)or wonder if I could lead my opponent into the position. Seems doing that is real master stuff.  Now that I think of it how many master games end in the Lucena?
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How often do master games end up with R & P vs R? This position and Philidor's position are essential. I bet that in more than 50% of such games EITHER the side with the pawn seeks Lucena's position OR the side without the pawn seeks Philidor's position.
Now imagine R & 2P vs R & P. Both sides will consider Lucena and Philidor as they evaluate pawn trades.
Now if 2 non masters play it is highly unlikely that atleast on of them wont make serious mistake that leads to an advantage of 2 or more pawns by the time Queens Bishops and Knights have been traded. Hence non masters have little experiance with or need to know these positions. Hence Experts suffer from endgame disease. They are skillful enough to frequently arrive at a close endgame but they dont have the experiance to handle it properly.
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