How many unbreakable fortresses do you know of? What are the most common ones? I'm trying to make a study pertaining to this, but, honestly, I do not know of very many fortresses. Feel free to comment!
In the last tournament I played in, I managed to construct an unbreakable fortress in order to hold the draw. I had a chance to go after the g3 pawn, but that is not an undertaking devoid of risk...
Here is the position.
6k1/6p1/5n2/7p/6rP/3Q2PK/8/8 w - -
lichess.org/editor/6k1/6p1/5n2/7p/6rP/3Q2PK/8/8_w_-_-
Here is the position.
6k1/6p1/5n2/7p/6rP/3Q2PK/8/8 w - -
lichess.org/editor/6k1/6p1/5n2/7p/6rP/3Q2PK/8/8_w_-_-
In game 6 of the Brains in Bahrain Man-Machine match Vladimir Kramnik vs Deep Fritz 15 October 2002 Kramnik resigned after move 34...axb6. However, analysis of the game shows that Kramnik could have reached a fortress!
Here is my uploaded, annotated version of game 6:
en.lichess.org/D9aLo9An#89
Here is the fortress position that Kramnik could have reached:
8/5k1p/5q2/8/1R6/6P1/5P2/6K1 b - -
lichess.org/editor/8/5k1p/5q2/8/1R6/6P1/5P2/6K1_b_-_-
The position after move 45.Rxb4 is a dead draw because white has achieved an impenetrable fortress!
Here is my uploaded, annotated version of game 6:
en.lichess.org/D9aLo9An#89
Here is the fortress position that Kramnik could have reached:
8/5k1p/5q2/8/1R6/6P1/5P2/6K1 b - -
lichess.org/editor/8/5k1p/5q2/8/1R6/6P1/5P2/6K1_b_-_-
The position after move 45.Rxb4 is a dead draw because white has achieved an impenetrable fortress!
You can check out the full study here: en.lichess.org/study/oAMkXOGo
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