Rook underpromotion Promotion (chess)

-











































in position @ left (with white move), black threatens capture white s pawn (which draw), , promotion queen stalemate. move 1.g8=r! wins because white can force elementary checkmate resulting position.


at right position 2006 game @ irish chess championship. here too, promotion queen allow stalemate: 70...b1=q?? 71.qh3+! kxh3 stalemate (or 71...kg1 72. qh1+! , black king forced capture). instead, game concluded 70...b1=r! 0-1





























less often, underpromotion rook may necessary not avoid stalemate, induce , save draw in otherwise hopeless position. right example end of study frédéric lazard. black threatens checkmate moving king , playing ...bf4. promotion queen not work on account of 1.d8=q? bf4 2.qd2+ kf3 3.qxf4+ kxf4 , black promotes either c-pawn or h-pawn. promotion rook saves draw, however, after 1.d8=r! bf4 2.rd2 (if 1...bxh2, 2.rd3+!), king moves black cause stalemate rook absolutely pinned, , bishop moves along c1–h6 diagonal can parried attacking bishop rook: 2...bg5 3.rd5 kf4 4.rd2 bh6 5.rd6 kg5 6.rd2 1 possible continuation.









Comments

Post a Comment

Popular posts from this blog

Weir report (2001) Rotherham child sexual exploitation scandal

-
1 weir report (2001) 1.1 home office pilot study 1.2 mapping exercise 1.3 home office report 1.4 files removed weir report (2001) home office pilot study in 2000 adele weir (later gladman), yorkshire solicitor, hired rotherham council research , development officer on home office crime reduction programme pilot study, tackling prostitution: works . section of study devoted young people , prostitution , , 3 towns—bristol, sheffield , rotherham—were highlighted in section. weir employed write report on rotherham. part of project s aim was: collection of information , evidence men allegedly involved in coercing young women prostitution might possible police pursue investigations and/or prosecutions. researchers @ university of bedfordshire, including social scientist margaret melrose, involved home office evaluators. weir s line manager manager of risky business, , placed in risky business offices in rotherham s international centre, worked jayne senior. according weir, encountered po...
Read more

Mussolini's views on antisemitism and race Benito Mussolini

-
mussolini adolf hitler in berlin, 1937 although mussolini had disregarded biological racism, firm believer in national traits , made several generalizations jews. nevertheless, mussolini considered italian jews italians. mussolini s antisemitic remarks in late 1910s , 1920s more suited moment rather sincere belief in them. mussolini blamed russian revolution of 1917 on jewish vengeance against christianity remark race not betray race . . . bolshevism being defended international plutocracy. real truth. yet within few weeks did u-turn remark bolshevism not, people believe, jewish phenomenon. truth bolshevism leading utter ruin of jews of eastern europe. in 1920s, mussolini stated fascism never raise jewish question , in article wrote stated italy knows no antisemitism , believe never know it. , elaborated let hope italian jews continue sensible enough not give rise antisemitism in country has never existed. in 1932, mussolini during conversation emil ludwig described antisemi...
Read more

The 20 musical examples Codex Martínez Compañón

-
trujillo cathedral the pieces short, 2 or 3 minutes each. order here follows k617 recording rather folio order: 1 cachua: al nacimiento de christo nuestro señor. 2 tonada: la brugita, de guamachuco - i.e. huamachuco, site of augustinian missions. 3 tonada: el congo. - negro slave song, reflecting use of african slaves in workforce 1660 4 tonada: el tuppamaro de caxamarca. 5 tonada del chimo - i.e. of chimú culture, surviving song in extinct mochica language 6 dance: baile del chimo. folio 179 (instrumental) 7 tonada: el diamante, de chachapoias. folio 187 8 tonada: la lata - can . 9 tonada: la selosa, del pueblo de lambayeque - jealous woman . 10 tonada: el conejo. 11 tonada: el huicho, de chachapoyas. 12 dance: bayle de danzantes con pifano y tamboril. (instrumental) 13 tonada: la donosa. 14 cachuyta de la montaña: el vuen querer - montaña indicates lowland east of mountains. 15 cachua duo y quatro: al nacimiento de christo nuestro señor. 16 lanchas para baylar. folio 186 - inst...
Read more