Extinction chess is a chess variant invented by R. Wayne Schmittberger,[lower-alpha 1] editor of Games magazine, in 1985.[1][2] Instead of checkmate as the winning condition, the object of the game is the elimination of all of a particular type of piece of the opponent. In other words, the objective is any of the following:

  • capture all the opponent's kings;
  • capture all the opponent's queens;
  • capture all the opponent's rooks;
  • capture all the opponent's bishops;
  • capture all the opponent's knights;
  • eliminate all of the opponent's pawns, by capturing or by promotion.

A promoted pawn is considered no longer a pawn. By the same token, if a player already has a queen, and promotes a pawn to another queen, then both queens would need to be captured to make them extinct.

The king is not a special piece in this game, and it is legal to promote a pawn to a king. It is also legal to castle when in check, or to castle through check. The other rules of castling are the same: the king and the rook must not have previously moved, and there must be no pieces in between. Similarly, rooks, bishops, and queens may freely cross attacked squares, even if they are the last of their type.

Both sides can suffer an extinction on the same move, if pawn promotion is involved. For example, White might have a last pawn on b7, and Black a last bishop on c8; then if White plays bxc8=Q, it causes the extinction of both the white pawns and the black bishops. In this case White is ruled to have won, as although both sides have fulfilled their winning conditions, it was a move by White that brought this situation about.[3]

Sample game

abcdefgh
8
a8 black rook
c8 black bishop
g8 black king
a7 black pawn
b7 black pawn
c7 black pawn
f7 black pawn
g7 black pawn
h7 black pawn
f6 black knight
b5 white pawn
e5 black pawn
c4 white bishop
d4 black rook
c2 white pawn
d2 white pawn
e2 white knight
f2 white pawn
g2 white pawn
h2 white pawn
a1 black queen
c1 white bishop
d1 white queen
f1 white rook
g1 white king
8
77
66
55
44
33
22
11
abcdefgh
Final position
N.N.–Fabrice Liardet, Messigny 1998:
1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. a3 e5 5. b4 Bxb4 6. axb4 Qxa1 7. Bc4 Nf6 8. Ba2? 0-0 9. Nge2 Rd8 10. Bc4 Nc6 11. b5 Nd4 12. 0-0 Nxe2 13. Nxe2 Rd4 0–1

White loses both bishops. Although "winning the exchange" is usually bad in Extinction Chess, the pin on the first rank in this case is very potent: White underestimated it and the Black rook's swift arrival on the d-file.[1][4]

Notes

  1. ↑ Using pseudonym Paddy Smith.

References

  1. 1 2 Pritchard (2007), p. 84.
  2. ↑ Pritchard (1994), pp. 105–06.
  3. ↑ "chessvariants.com -- Comment Listing". www.chessvariants.org.
  4. ↑ Beasley, John (1999). "Points from near and far" (PDF). Variant Chess. 4 (31): 39. Retrieved 29 September 2023.

Bibliography

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