A few months ago, I posted an article about queen vs. rook. I have one position to add to it.
[Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "8/8/8/8/1K6/8/rk6/3Q4 w - - 0 1"]
[PlyCount "5"]
{If it is Black to move, then it's zugzwang. If it is White's turn, then the
best move is} 1. Qd5 $1 ({Not} 1. Qb3+ Ka1 2. Kc3 $4 Rc2+ $1 3. Kd3 Rd2+ $1) (
1. Qd2+ Kb1 2. Qe1+ {hopes for} Kb2 3. Qd1 {
zugzwang, but Black can avoid this with 2...Kc2}) 1... Kb1 2. Kb3 Rb2+ 3. Ka3 {
and the rest is straightforward} *
Converting Q vs. R was critical to becoming the #1 endgame benchmark player on ChessTempo
