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70 votes
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Can you solve this unique chess problem of white's two queens vs black's six rooks?

It's checkmate in 20 moves. White's queens circle around the board giving checks, and Black interposes horizontally/vertically moving pieces. Black only has one choice because the other piece is ...
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60 votes

Demystifying Seirawan-Kasparov 1983 king and pawn endgame

In this game Kasparov is showing a perfect demonstration of the triangulation technique in order to Zugzwang the white king. To be in a Zugzwang means, any move loses or more generally, worsens your ...
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55 votes
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Is it rude to ask my opponent to resign an online game when they have a lost endgame?

Is it rude to ask my opponent to resign an online game when they have a lost endgame? Yes, it is rude, although you are in good company. In one Olympiad Victor Korchnoi is alleged to have asked his ...
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51 votes
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Where can I find this game with a sacrifice followed by a long series of checks leading to a discovered mate?

I believe that the game you speak of is the extremely famous Lasker-Thomas match in which Lasker forces Black to accept his queen "sacrifice" on move 11. It is followed by a king hunt in ...
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46 votes

Why underpromote in this KNNP-KR endgame?

If you promote to a queen with 1. b8Q, black has: 1...Re2+ 2. Kd1 Rb2 attacking the queen and hinting at mate with Rb1++. If white takes the rook 3. Qxb2 it is stalemate. Because of the mate ...
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46 votes
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Are resignations by expert players naive?

By the time an expert resigns the decision tree may still be large but its evaluation has become simple. Players usually resign because continuing would be miserable to them and boring to their ...
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45 votes
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How do I handle drawn positions in zero time increment games?

K+R vs. K+R is a draw, but K+R+10 sec vs. K+R+20 sec is not a draw. Your opponent won because they had an advantage brought on by having better time management. Nothing to complain about -- time is an ...
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41 votes

Endgame problem: How to avoid stalemate and win?

It's quite a fun problem to think about, before getting to the calculation of long variations, try to first spot the key idea needed to crack the problem. Here are the first observations that come to ...
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39 votes

Please help solve this endgame problem posed by a friend

White is one tempo short of catching the pawn - if White could make two moves immediately it would be a draw as white would just take the black pawn. But they can't, so white has to find a threat ...
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  • 4,031
37 votes

Is it rude to ask my opponent to resign an online game when they have a lost endgame?

Brian Towers answered the question, but to help you understand why people don't resign, I recommend you watch this lecture by GM Finegold Blunders, with GM Ben Finegold. The gist of it is: Never ...
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37 votes
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Is there a mathematical theorem that you can use to win a chess endgame?

Unfortunately the (original) question was a bit ambiguous and arguably still is. I try to sort the different interpretations out: Chess fulfils all requirements of "standard" game theory (...
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34 votes

I'm new to chess-what should be done here to win the game?

This position is a draw, the game is over. It is not possible for either side to checkmate the other from this position, not even if the side with the bare king would try to help. The same is true for ...
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31 votes

Is it rude to ask my opponent to resign an online game when they have a lost endgame?

It's always rude to ask your opponent to resign. They should resign of their own accord once they're convinced that you're overwhelmingly likely to win the game. In my case, that always meant you'd ...
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31 votes
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Does a KQQ vs KQ endgame position with perpetual check exist?

The position given by Akavall is indeed a draw by perpetual, but it's a bit difficult to see because White has many different options at some moves. They can even choose to sacrifice the h2 queen, ...
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31 votes
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Why does chess.com consider this promotion a blunder?

50 points sounds huge, but there actually is no meaningful difference between -6.4 and -62 in such an endgame.* 6.4 is more or less "Black has a queen for a bishop (but I haven't found a way to ...
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29 votes

Understanding Anand's Bc4 move vs Ivanchuk 1992

In short, the key idea is to prevent white from playing h2-h3! Bc4 forces the exchange of light square bishops, and thus, sets up Rh3 which blocks the h2 pawn and keeps both the h2 and g4 pawns weak. ...
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28 votes
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Stockfish blunders away a piece

This is not a blunder, expected behaviour from the engine. Everything worked as intended. Try to copy the FEN string out, and you'll know. Although the position looked winning, White didn't have ...
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28 votes

Is this a draw despite the Stockfish evaluation of −5?

This is a fortress and a draw. The black king can't advance as the rook, shuffling between h3 and f3, prevents it. The only way to break the fortress is to trade the queen for the rook and pawn, but ...
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27 votes
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How many pawns make up for a missing queen in the endgame?

The simple and obvious answer is that it all depends on the position of black's pawns and king. In general the further up the board the pawns the better for black provided the king is in contact with ...
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27 votes

How difficult is it to win a winning endgame against an engine?

An interesting question! I set up the position, gave myself 10 minutes of time and tried playing against the most difficult engine on lichess. I failed to win even though I used one takeback as well. ...
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26 votes

Why is there no rule allowing a player to claim a draw in lonely king endgames?

Why is there no rule allowing a player to claim a draw in lonely king endgames? For the simple reason that there is no need. If you are the player with the extra material you can offer a draw and be ...
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25 votes
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How is Kasparov vs Shirov 1992 a victory?

Shirov resigned: the thinking was that despite both sides left with pawns and a knight, the advantage went to Black. Black has an extra pawn and Black's pawn chain is mutually supporting. White is ...
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25 votes
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Can you solve this queen + 3 pawns vs bishop + 3 pawns chess problem?

If White can get the Black king to the first rank, then it will not be fast enough to catch the g-pawn from promoting. White starts by playing 1. Qg5, and after 1...Kh7 2. Qf6 Kg8 3. Qh6, the White ...
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24 votes

KBN vs K checkmate on nonstandard boards

Actually, the bishop and knight mate is not as slippery as it appears. I have checked this on a tablebase program I wrote. On a 10x10 board, the side with the bishop and knight (say white) can force ...
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24 votes

Is this endgame (sort-of Q vs K) a draw?

According to the Lomonosov tablebases, it's mate in 40 for black. While the queen can't force mate by herself, she can force a zugzwang. In this case, when the bishop is forced to move to e8. Then, it'...
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24 votes
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Can you solve this chess problem of a lone knight against numerous opposing pieces?

OK The check must come from the knight (D'uh!) The black king must be on c5 for the mate The white king must be used to cover any empty squares to the right of the black king - thus the white king ...
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  • 4,031
23 votes
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Checkmate with two knights?

Is it really possible to checkmate with two knights and king against a king? Theoretically, the checkmate is possible, but you can not do it in practice unless the weaker side allows you to. This ...
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23 votes

Pawn Promotion Endgame Problem-White to move and mate in 1

It's probably a trick problem with a promotion to a black knight. Such promotions to the wrong colour are not allowed, and never were. In the official rules it is now specifically pointed out that ...
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23 votes
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How do I promote my pawn when the king blocks it?

This position is a draw with White to move. However, the same position would lead you to win if it was black to move (Zugzwang). The basic theory for you to promote the pawn when the opponent king is ...
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  • 1,289
23 votes

Would there be more decisive games if we began to see stalemates as checkmates? And hence more "interesting" chess?

Absolutely not. Making stalemate a win would be a sure way to make for less interesting chess. Any rule change which makes it easier to convert a small material advantage to a win, will ipso facto ...
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