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# Hop Chess

`This idea came out after placing two checkers (one of each color) on board. What could be done with those special pieces?`

## Setup

`The same as FIDE chess.`

## Pieces

`The same as FIDE chess plus a special piece called the trampoline (check below). [addendum] Its original name was 'hopper' but I followed a suggestion of Alfred Pfeiffer to rename it with a more proper name.`

## Rules

```0. Same as FIDE except:
1. On each turn, each player must do both the following actions:
1.1. Move a friendly chess piece; then
1.2. Move his trampoline to any empty square
2. If a chess piece moves onto a trampoline (of either color),
it must move again (it's invalid to return to the initial square).
2.1. Kings cannot move onto a trampoline, nor castle across one.
2.2. If the piece cannot move after the trampoline, the move
is invalid.
2.3. If a queen lands on a trampoline, it continues with the same
type of movement that it used to get there (i.e., both orthogonal or
both diagonal moves).
2.4. En-passant is still possible, but not if either pawn moves twice.
3. Initially, the trampoline start off-board.
White's first move is restricted to a piece move only.```

## Notes

* When moving the trampoline, the player may place it where it was. He does not have to change the place of his trampoline every turn. * Pieces may move over trampoline. * A piece may execute two hops, if it moves from one trampoline to another. * A trampoline extends the moving/capturing range of pieces, so a King may be under check via one or both trampolines. * It is not possible to capture more than one piece per move, since trampoline are always on empty squares. * A pawn may promote onto a trampoline and then the player must move the promoted piece. Example ```(@ white trampoline, # black trampoline) r . b q k b n r Some valid moves: p p . . p p p p Bc8-f5-e4 . . n p . . . . d2-d4:c5 . . p . . # . . Nc6-d4-f5:g3 . . . @ . . . . . . . . . . O . O O O O O O B O R N B Q K . N R A game: HOP-CHESS ========= 1. e4 Nf6 d5 2. d4 d3 e6 b4+ 3. Nc3 g5 Be7 b4 4. B:f6 e5 e:d4 b4 5. Q:d4 e5 g:f6 b4 6. e:f6 e4 Na6 c5 7. f:e7 d5 c:d4 b4 8. e:Q+ f3 K:Q e8+ 9. Nce2 f3 d3 b4 10. c:d3 c1 Nd4+ e8 11. Kd2 h3 N:b2 c4+ 12. Kc2 a4 Na3+ e6 13. Kb3 c1 Re5 a5 14. Ne4 c6+ Ke8 e3+ 15. N:e5 c6 a5 a4+ 16. K:a3 b1 b5 b4+ 17. B:b5 e1 resign r . b . k . . . . . . p . p . p . . . . . . . . p B . . N . . . . # . . . . . . K . . . . . . . O . . . . O O O R . . . @ . N R``` Even though the existence of trampolines makes the opening and middle game much more attack-oriented, and also the distant endgame, it does NOT seem to be the case for most K & P endgames, even with a minor piece or two. The reason is, that the weaker side can use his trampoline to stop the stronger king from ever making a breakthrough into the enemy area, as usually happens in endgames. So there are SOME games at least that are harder to win in the trampoline version. But not many. http://sagme.blogspot.com/2005/05/hop-chess.html

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By João Pedro Neto.
Web page created: 2006-01-17. Web page last updated: 2006-01-17﻿