Commit | Line | Data |
---|---|---|
dbcc32e9 BA |
1 | p.boxed |
2 | | Pawns start on the 7th rank. Move a knight to promote them. | |
3 | ||
4 | Diagram: ... threatens Nc5-Nd3# and allow 2.b8=Q | |
5 | ||
6 | figure.diagram-container | |
7 | .diagram | |
8 | | fen:: | |
9 | figcaption Standard initial position after 1.Na6 | |
10 | ||
11 | h3 Specifications | |
12 | ||
13 | ul | |
14 | li Chessboard: standard. | |
15 | li Material: standard. | |
16 | li Non-capturing moves: standard. | |
17 | li Special moves: no castling (and no en-passant). | |
18 | li Captures: standard. | |
19 | li End of game: standard. | |
20 | ||
21 | p. | |
22 | ...(Almost) Only the initial position changes, but this is a very big change. | |
23 | In particular, castling would be rather pointless so it's disabled here. | |
24 | En-passant captures are impossible because all pawns already reached 7th rank. | |
25 | ||
26 | h3 Note on initial position | |
27 | ||
28 | p. | |
29 | Since truly random start can allow un-defendable mate in 3 with a knight, | |
30 | the kings touch at least one knight in the initial position. | |
31 | This allows to move free out of potential check from the very beginning. | |
32 | Here is an example: | |
33 | ||
34 | // TODO: diagram | |
35 | figure.diagram-container | |
36 | .diagram | |
37 | | fen:r7/2n5/1q6/5k2/8/8/K7/8: | |
38 | figcaption. | |
39 | The king cannot take on a8 because it's guarded by the knight: it's checkmate | |
40 | ||
41 | h3 Source | |
42 | ||
43 | p | |
44 | | See for example the | |
45 | a(href="https://www.chessvariants.com/diffsetup.dir/upside.html") Upside down chess | |
46 | | page on chessvariants.com. |