| 1 | p.boxed |
| 2 | | When a piece moves, the initial square disappears. It creates a |
| 3 | a(href="https://en.wikipedia.org/wiki/Wormhole") "wormhole" |
| 4 | | . |
| 5 | |
| 6 | p. |
| 7 | Since all initial squares vanish, the board has exactly 64 - T squares |
| 8 | after T turns, so the game cannot last more than 32 moves. |
| 9 | Indeed a vanished square can be jumped over, but cannot be used again. |
| 10 | Holes are indicated with the letter 'x' on FEN strings. |
| 11 | |
| 12 | p. |
| 13 | In the diagram situation, the black knight can go to all the marked squares: |
| 14 | g5 and f6 are reachable because of the holes on f4 and e5. |
| 15 | Indeed the knight first moves one square vertically or horizontally, |
| 16 | and only then one square diagonally "in the same direction". |
| 17 | This is the only valid description in this variant |
| 18 | (others would lead to different knight movements around holes). |
| 19 | The black king can go to c6: |
| 20 | it moves to the closest non-vanished square (if any). |
| 21 | |
| 22 | figure.diagram-container |
| 23 | .diagram |
| 24 | | fen:cwkxxxwn/ppxppppx/2mxxW2/4x2p/3P1x2/3n1x2/PPPxPPPP/CWxxxNKC b2,f2,b4,c5,g5,f6: |
| 25 | figcaption Possible moves for the knight on d3. |
| 26 | |
| 27 | p. |
| 28 | No castle or en passant captures are possible. |
| 29 | Promotion is permitted but only by capturing. |
| 30 | |
| 31 | h3 Pieces movements |
| 32 | |
| 33 | p Three new pieces replace usual sliders: |
| 34 | |
| 35 | figure.showPieces.text-center |
| 36 | img(src="/images/pieces/Wormhole/wc.svg" style="width:60px") |
| 37 | img(src="/images/pieces/Wormhole/ww.svg" style="width:60px") |
| 38 | img(src="/images/pieces/Wormhole/wm.svg" style="width:60px") |
| 39 | figcaption Left to right: Champion, Wizard, Murray Lion. |
| 40 | |
| 41 | ul |
| 42 | li. |
| 43 | The champion moves two squares in any direction, |
| 44 | or one square orthogonally. |
| 45 | li. |
| 46 | The wizard moves like an extended knight: two squares in an orthogonal |
| 47 | direction, and then one diagonal step. Or, a single diagonal step. |
| 48 | li. |
| 49 | The Murray Lion can move two squares in any direction. |
| 50 | He can also capture (only) by one square like a king. |
| 51 | li The other pieces move like in orthodox chess. |
| 52 | p All pieces can jump over others when moving by two squares. |
| 53 | |
| 54 | h3 End of the game |
| 55 | |
| 56 | p Win by checkmate or stalemate: if you can no longer move, you lose. |
| 57 | |
| 58 | h3 Source |
| 59 | |
| 60 | p |
| 61 | a(href="https://www.chessvariants.com/32turn.dir/wormhole.html") |
| 62 | | Wormhole chess |
| 63 | | on chessvariants.com. |
| 64 | |
| 65 | p |
| 66 | | Inventor: Fergus Duniho (2000). |
| 67 | | Similar to |
| 68 | a(href="https://www.chessvariants.com/boardrules.dir/cheshir.html") |
| 69 | | Cheshire Cat Chess |
| 70 | | by Vernon R. Parton (1970). |