Commit | Line | Data |
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dbcc32e9 BA |
1 | p.boxed |
2 | | Pawns start on the 7th rank. Move a knight to promote them. | |
3 | ||
dbcc32e9 BA |
4 | h3 Specifications |
5 | ||
6 | ul | |
7 | li Chessboard: standard. | |
8 | li Material: standard. | |
9 | li Non-capturing moves: standard. | |
10 | li Special moves: no castling (and no en-passant). | |
11 | li Captures: standard. | |
12 | li End of game: standard. | |
13 | ||
14 | p. | |
15 | ...(Almost) Only the initial position changes, but this is a very big change. | |
16 | In particular, castling would be rather pointless so it's disabled here. | |
17 | En-passant captures are impossible because all pawns already reached 7th rank. | |
18 | ||
19 | h3 Note on initial position | |
20 | ||
21 | p. | |
22 | Since truly random start can allow un-defendable mate in 3 with a knight, | |
23 | the kings touch at least one knight in the initial position. | |
24 | This allows to move free out of potential check from the very beginning. | |
dbcc32e9 | 25 | |
5915f720 BA |
26 | p. |
27 | To illustrate this phenomenon, although it's defendable the standard initial | |
28 | position allows the attack as 1.Na6 (threatening Nc5-Nd3#), | |
29 | forcing the defense Nf3-Ne5. With a knight next to the king you have more options. | |
30 | ||
dbcc32e9 BA |
31 | figure.diagram-container |
32 | .diagram | |
5915f720 BA |
33 | | fen:R1BQKBNR/PPPPPPP/N7/8/8/8/pppppppp/rnbqkbnr: |
34 | figcaption Standard initial position after 1.Na6 | |
dbcc32e9 BA |
35 | |
36 | h3 Source | |
37 | ||
38 | p | |
39 | | See for example the | |
40 | a(href="https://www.chessvariants.com/diffsetup.dir/upside.html") Upside down chess | |
41 | | page on chessvariants.com. |