Commit | Line | Data |
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0d5335de BA |
1 | p.boxed |
2 | | Giving check is forbidden, unless it is a checkmate. | |
3 | ||
4 | p. | |
5 | Neither player is allowed to give a check, with the exception of checkmate. | |
6 | Thus, the king is much more powerful than in orthodox chess: as long as | |
7 | he can (potentially) escape, he doesn't fear attacks. | |
8 | So the king can be used to defend pieces in an unusual way. | |
9 | ||
10 | p. | |
11 | On the following diagram, 1.Qxa6 threatens 2.Bb6 | |
12 | with a mate to follow by Qxa7. | |
13 | The black rook cannot take because it would check the white king. | |
14 | ||
15 | figure.diagram-container | |
16 | .diagram | |
17 | | fen:1k1r1b2/rP1b2p1/pQ1pp1nq/K4p1p/P4PnP/2PN2P1/3PP1B1/R1RN2B1: | |
18 | figcaption 1.Qxd8+ is forbidden because 1...Bc8 would be possible. | |
19 | ||
20 | h3 Disambiguation | |
21 | ||
22 | p. | |
23 | 1.Qf7# is checkmate on the left diagram, because if the king takes | |
24 | then the rook on h8 gives check but not checkmate. | |
25 | However, on the right diagram 1.Qf7+ runs into 1...Kxf7#, which is now | |
26 | a legal move because the white king is checkmated. | |
27 | ||
28 | figure.diagram-container | |
29 | .diagram.diag12 | |
30 | | fen:K5kr/8/5Q2/8/8/8/8/8: | |
31 | .diagram.diag22 | |
32 | | fen:K5kr/RB6/5Q2/8/8/8/8/7b: | |
33 | figcaption 1.Qf7 mates on the left, but not on the right. | |
34 | ||
35 | h3 Source | |
36 | ||
37 | p | |
38 | a(href="https://www.chessvariants.com/usualeq.dir/checklss.html") | |
39 | | Checkless chess | |
40 | | on chessvariants.com, and the | |
41 | a(href="https://en.wikipedia.org/wiki/Checkless_chess") Wikipedia page | |
42 | | . |