projects / vchess.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | | . |