Questions tagged [fortress]

In chess, the fortress is an endgame drawing technique in which the side behind in material sets up a zone of protection around their king that cannot be penetrated by the opponent. https://en.wikipedia.org/wiki/Fortress_%28chess%29

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Testing Mate Possibility Without Use of King

I would like to be able to convince myself of the possibility (or lack thereof) of mate using various piece combinations in which the attacker doesn't use their own king. I'd like to approach this by ...
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How does Anna Rudolf beat Hikaru Nakamura in this rook vs queen endgame fortress that came from a choker game (chess + poker)?

Position that follows is from Anna Rudolf's video 'Challenging Top Chess Grandmaster Hikaru Nakamura for a Choker Match!': [FEN "8/5p2/8/2qkp3/4R1P1/5P2/3KP3/8 b - - 0 1"] Also, here's a ...
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Pogchamps: How does Michelle Khare beat Pokimane (rook and knight vs rook pair)?

From pogchamps, specifically semifinals of consolation bracket of pogchamps 3: [FEN "4k3/7p/5p2/8/P2rr3/5N2/6PP/4R1K1 w - - 0 1"] Black (Michelle Khare) just blundered a rook, but white (...
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Computer being right and human being wrong

Of course, computers have changed the evaluation of more than one endgame position (BB vs N being the most known, I guess), which humans thought to be drawn. Having read another question here, I'm ...
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Is this position a fortress?

I am unsure how to break through as white here. There seem to be no way to get a passed pawn on the e file. Stockfish evaluates this as +3 at high depths but gives no plan. Any plans? [fen "3Q4/...
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5 votes
2 answers
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Why doesn’t Stockfish evaluate this fortress as 0.0?

I'm going through the 100 endgames you must know book on Chessable and stumbled upon something I don't understand. This position with white to move is described as a draw starting with 1. Kh1. I ...
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Is the following position a fortress?

[FEN "8/4k2p/p1b1p1pP/Pp1p2K1/1PpP1P2/2P1R3/8/8 b - - 0 1"] Houdini6.02 eval flatlines at 1.37, but I reached d= 54 , and , although the eval continued to flatline, the main line indicated ...
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When are games against engines drawn?

When two engines play against each other in a game of chess, when is it appropriate to declare a draw when clearly no progress is possible? For example: 8/6k1/8/R3K2p/2r3p1/6P1/7P/8 w - - 0 2 This ...
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What is this formation called?

I recently came across this formation at random. I vaguely remember reading about it around a decade ago. I want to know if this is a known play. [FEN "8/8/8/8/8/2NPPN2/PPPBBPPP/2RQKR2 w - - 0 1&...
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Technique to win this same colored bishop endgame

The following endgame is a same-colored bishop endgame which I had on a game in Lichess. I tried for approximately 30 moves to try and win this game, but in the end, I got nothing more than a draw. I ...
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Is this endgame (sort-of Q vs K) a draw?

I think the following endgame is a draw. [FEN "7k/5BpP/3K2P1/8/8/8/8/4q3 w - - 0 1"] My reasoning: I'm playing white. I will only move my king, always. Black's king cannot move. If the queen decide ...
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8 votes
1 answer
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Amazon vs Chancellor endgame

Many online sources (such as Wikipedia) state that the endgame of amazon (piece that moves like Queen and knight) and chancellor (piece that moves like rook and knight) is a draw. I did some ...
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2 votes
3 answers
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Can black make any progress in this end game?

I have been analyzing this endgame for a while now, but I can't seem to make any progress. The engine evaluation is -2.5, but I'm wondering if this is one of those weird evaluations that is wrong ...
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12 votes
2 answers
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What is a fortress in chess?

Throughout the 2016 World Championship match, analysts have made many references to the term "fortress". What does it mean, and how can I use it to my advantage?
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9 votes
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Is this a fortress?

I have just played a thoroughly enjoyable game, where in the middlegame I was forced to give up the queen for two minor pieces and defend. After 30 moves and some trades, the situation got simplified ...
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