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Questions tagged [selfmate]

A selfmate is a type of chess problem in which one side, usually White, forces the other side to checkmate them. The other side plays to avoid the checkmate.

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3 votes
3 answers
253 views

What conditions must/should be added to this fairy selfmate stipulation?

[Title "s#2 (?) Maximummer - Anatolii Vasylenko Die Schwalbe 132 12/1991 4. Lob"] [FEN "1K2k2r/r4R2/8/QPp4p/8/8/8/8 w - - 0 1"] 1. bxc6ep Rxf7 2. Qxh5 0-0# 1. ... ...
1 vote
1 answer
43 views

Relationship between having a selfmate and having a checkmate?

Usually in selfmate problems white has material advantage to be able to force black to checkmate white, so white likely has a conventionally better position or has a forced checkmate. But not always, ...
4 votes
3 answers
257 views

Move forcing opponent to checkmate in response

I was wondering if there was a move so bad in chess that if you played it the only move your opponent could do was checkmate you back, through blocking your piece or through moving the king. It would ...
1 vote
0 answers
37 views

The worst possible move [duplicate]

The "worst possible move" must have the following characteristics: With one exception, all legal moves would mate the opponent. The player to move makes that exceptional move. After that, ...
18 votes
6 answers
4k views

Can one side force a loss in regular chess?

Chess is unsolved, so there is no known optimal strategy for one side to force a win or a draw. However, is there an optimal strategy to lose? Consider a variant where checkmate results in a loss, ...
21 votes
5 answers
7k views

A position with the only legal move resulting in checkmate

Theoretically, is it possible that for some position, the only legal move for a side leads to a checkmate (that is, the opposite king gets checkmated)? If so, has this ever occurred in a real game?
1 vote
0 answers
62 views

Actual selfmate in OTB game? [duplicate]

Danger, Will Robinson, in both English and German "selfmate" is occasionally used for what problemists correctly term "helpmate". I mean selfmate: a move so idiotic it forces the ...
12 votes
3 answers
1k views

Position where neither player can force a win and neither player can force a draw

One sometimes sees the claim that in every chess position, either White has a forced win, or Black has a forced win, or both players can force a draw. While this claim is "morally" correct, ...
8 votes
5 answers
817 views

Is this selfmate solvable or fixable?

This is a kind of a repost of a fascinating chess problem that appeared yesterday. The original poster got shy or something, and bafflingly deleted his own post, which was beginning to attract some ...
1 vote
1 answer
402 views

I have discovered a selfmate requiring 1,351 moves to enforce. How does this move-count stack up against the 'record holder'?

I've discovered a selfmate requiring 1,351 moves to enforce. What is the highest move-count known for a selfmate? {The starting position is provably legal}.
9 votes
1 answer
211 views

Selfmate problem

[FEN "8/7P/8/p2p4/P2p4/pB1p4/3P4/k2K4 w - - 0 1"] Composed by IM Geir Sune Tallaksen. White moves first, and must force Black to deliver checkmate. Give the sequence of moves that force ...
3 votes
1 answer
172 views

The quickest selfmate in 2

Duh. Clearly, the one shown there with Qxh5+ Rxh5# can be easily turned into a s#2, by e.g. B-e2-f3, Qe2 from White and c6, Q-a5xd2-d1 from Black. 9.0 moves if I added correctly. Someone care to beat ...
10 votes
1 answer
2k views

Is there more than 1 solution?

In this selfmate puzzle is there more than one solution? I think I found one but I was curious to know if there is more than one. 4N2k/5P2/3p1rP1/2pP4/2p1K1R1/2B1P1N1/6Pp/8 w - - 0 0 Credit: J. C. J. ...
4 votes
4 answers
488 views

Theoretically, is the analysis of the moves more complex if the objective is to be the first to be checkmated?

I have seen variations of other board games or strategy games where the aim is to actually 'lose' the game by forcing your opponents to make moves. Applying this concept to the rules of chess, would ...
4 votes
2 answers
766 views

The quickest selfmate in 1

How quickly can a legal game reach a position where one side must give checkmate? This is in effect Evergalo's reading (see his (now deleted) answer) of Rewan Demontay's Question 33154; that question ...
4 votes
1 answer
268 views

Is KQB vs KP generally sufficient to force a selfmate?

User Hauke Reddmann noted in a previous answer that there should be a straightforward way to secure selfmate against a substantially weaker opponent (i.e., force them to checkmate you): win all the ...