user16626: Edmar Mednis stated that in KNN vs K endgame, the inability to force checkmate is one of 'the great injustices of chess'. This seems to be defined as a drawn/drawish endgame position but where 1 side is up at least 4 points in material.
The phrase 'one of' seems to indicate there are other injustices in his mind. So, what are other 'great injustices of chess'?

user10380: One thing I think is an injustice of chess is the rule enabling a player being able to get a 50-move draw even if their position is lost. (A "blessed loss" position; a "cursed win" from the point of the other player, who deserved the chance to try to execute a win.)

user12873: I can think of some:

Time trouble causing blunders in general.
Objectively you can have an advantage, but then having to convert/transform it could require an impractical level of calculation (such that no human could ever realistically win over the board with such an advantage).
Some argue stalemate in general is wrong. Why should trapping the king be a draw, but trapping the king while simultaneously threatening it be a win? This doesn't match how a real battle would be like.

I think he said that though more of as an expression, not with any serious implications.

user19877: It is probably not only about position, but how about playing for 7 hours, and you are positionally killing your opponent, and you slip up, throwing away all that work?
Here are a couple positions that still probably qualify:
 [FEN "7k/7P/8/6K1/4B3/8/8/8 w - - 0 1"]

You would think that white should be able to win, but no.
Or black here.
 [FEN "6K1/5P2/6q1/8/8/8/1k6/8 w - - 0 1"]

 1. Kh8=


16626: <p><a href="https://en.wikipedia.org/wiki/Edmar_Mednis" rel="nofollow noreferrer">Edmar Mednis</a> stated that in KNN vs K endgame, the inability to force checkmate is <em>one of</em> 'the great injustices of chess'. This seems to be defined as a drawn/drawish endgame position but where 1 side is up at least 4 points in material.</p>
<p>The phrase 'one of' seems to indicate there are other injustices in his mind. So, what are other 'great injustices of chess'?</p>
 10380: <p>One thing I think is an injustice of chess is the rule enabling a player being able to get a 50-move draw even if their position is lost. (A "blessed loss" position; a "cursed win" from the point of the other player, who deserved the chance to try to execute a win.)</p>
 12873: <p>I can think of some:</p>

<ul>
<li>Time trouble causing blunders in general.</li>
<li>Objectively you can have an advantage, but then having to convert/transform it could require an impractical level of calculation (such that no human could ever realistically win over the board with such an advantage).</li>
<li>Some argue stalemate in general is wrong. Why should trapping the king be a draw, but trapping the king while simultaneously threatening it be a win? This doesn't match how a real battle would be like.</li>
</ul>

<p>I think he said that though more of as an expression, not with any serious implications.</p>
 19877: <p>It is probably not only about position, but how about playing for 7 hours, and you are positionally killing your opponent, and you slip up, throwing away all that work?</p>

<p>Here are a couple positions that still probably qualify:</p>

<pre><code> [FEN "7k/7P/8/6K1/4B3/8/8/8 w - - 0 1"]
</code></pre>

<p>You would think that white should be able to win, but no.</p>

<p>Or black here.</p>

<pre><code> [FEN "6K1/5P2/6q1/8/8/8/1k6/8 w - - 0 1"]

 1. Kh8=
</code></pre>
