nicolas-dupontNo.760 
Nicolas Dupont
(France)

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No.760 by Nicolas Dupont – PG problem with Extinction Chess shown for the first time on JF! (JV)


Definition:

Extinction Chess: A side is in check if it is threatened to no more have a kind of piece it owned in the diagram position. Promotions to King are allowed.


No.760 Nicolas Dupont
France

original – 27.03.2015
After Joost De Heer

Solution: (click to show/hide)

white Bf1c1 Ke1 Qd1 Ph2g2f2e2d2c2b2a2 Sg1b1 Rh1a1 black Bf8c8 Ke8 Qd8 Ph7g7f7e7d7c7b7a7 Sg8b8 Rh8a8

PG20                                   (12+14)
Extinction Chess


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Paul Rãican
Paul Rãican
5 years ago

The problem published by Joost (Probleemblad 2006) is: 1. f4 e5 2. f5 Bc5 3. f6 Se7 4. fxg7 Bf2+ 5. g8=K c5 6. a4 Qb6 7. a5+ Qb5 8. a6 Sbc6 9. axb7 Rxg8+ 10. b8=K Rxb8+. Nicolas just made a significant improvement.

Joost de Heer
Joost de Heer
5 years ago

Is this a cook?
10… f5 11. b4 Rxb4 12. Kh8 Rc4 13. Kg8 and black moves same as in solution, white moves his second king around with 20. Kg8 Bxg8# at the end.

Joost de Heer
Joost de Heer
5 years ago
Reply to  Joost de Heer

I meant Kg7 instead of Kh8 of course.

Joost de Heer
Joost de Heer
5 years ago

1. a4 e5 2. a5 Qh4 3. a6 Se7 4. axb7 Sa6 5. b8=K Bb7 6. f4 Bd5 7. f5 Sc6 8. f6 Be7 9. fxg7 Rxb8+ 10. g8=K f5 11. b4 Rxb4 12. Kg7 Rc4 13. Kh6 Rg8 14. g4 Sab8 15. g5 f4 16. g6 Rxg6 17. Kg7 Rd6 18. Kg8 f3 19. Kg7 f2 20. Kg8 Bxg8#

dupont
dupont
5 years ago

Yes, I was about to say that the wPg2 must also be captured, but this is indeed possible… If you are able to use my ideas to find a correction Joost, maybe we could then publish it as a joint.