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| Karl Lorenz Jesper Jespersen, Southern Trade Gazette, 1883. Código FEN: 1b2B3/p4b2/2RN4/r1p1p1Q1/k1p4r/P1p3p1/K5p1/5n1q w - - 0 1. |
As Brancas jogam e dão xeque-mate em 3 lances!
(White to play and give checkmate in 3 moves!)
Karl Lorenz Jesper Jespersen foi um brilhante criador de problemas de xadrez dinamarquês. Hoje, dia primeiro de agosto, seria seu 168º aniversário.
(Karl Lorenz Jesper Jespersen was a brilliant Danish chess composer. Today, August 1st, would be his 168th birthday.)
PCFilho
The surprising key is 1 Qh5!, sacrificing the queen to two black pieces to threaten 2 Qd1+ c2 3 Qxc2 and 2 Ra6+ Bxe8 3 Qxe8. The only way to deal with both threats is to capture the queen. 1 ... Rxh5 unguards e4, leading to 2 Sxe4, threatening 3 Sxc3, with the variations 2 ... Ra6 3 Rxa6 and 2 ... Rb5 3 Ra6. (These mates are distinct in that one is a double check and the other is a pin-mate.) 1 ... Bxh5 leads to 2 Sb5, again threatening 3 Sxc3, with the variations 2 ... Ra6 3 Rxa6, 2 ... Rb5 3 Ra6 (again, these two mates are distinct; one is a pin-mate and the other isn't), and 2 ... Kxb5 3 Rg6 (cutting off the black bishop's guard of e8). Note that all five of these lines utilize the B+R battery in some way.
ResponderExcluirHappy 168th, Mr. Jespersen.
Well done, Jake!! Thanks for such a thorough explanation. :)
ExcluirAnd happy 168th, mr. Jespersen!!
1. Qh5!! is the amazing key move!
ExcluirThis poses two deadly threats at the same time:
1. ... ~ 2. Ra6+ Bxe8 3. Qxe8#
1. ... ~ 2. Qd1+ c2 3. Qxc2#
(Obviously:
1. ... Rb5 2. Ra6#
1. ... Ra6 2. Rxa6#)
So, Black has to accept the Queen sacrifice:
1. ... Rxh5 2. Ne4!! ~ 3. Nxc3#
2. ... Rb5 3. Ra6#
2. ... Ra6 3. Rxa6#
1. ... Bxh5 2. Nb5!! ~ 3. Nxc3#
2. ... Ra6 3. Rxa6#
2. ... Rxb5 3. Ra6#
2. ... Kxb5 3. Rg6#
According to Jesperson's biography, he died 7 August 1914, which means that at the time of his death he was 66 years and 6 days old. I found this fact to be quite bizarre and a little freaky as well.
ResponderExcluirI don't know if this has any scientific base (probably not), but I have a perception that too many people die very near their birthdays. I had noticed this when reading Jesperson's biography.
ExcluirBut I hadn't realized that he was 66 years and 6 days old. This is, indeed, a freaky coincidence, to say the least...