tag:blogger.com,1999:blog-37675897.post4688883300584073786..comments2023-12-28T02:11:22.501+00:00Comments on The Streatham & Brixton Chess Blog: The twelve puzzles of XmasTom Chivershttp://www.blogger.com/profile/09850710685193416732noreply@blogger.comBlogger7125tag:blogger.com,1999:blog-37675897.post-23215260379919250382011-01-11T16:26:05.249+00:002011-01-11T16:26:05.249+00:00OK. Jack has it, basically.
The puzzle was origin...OK. Jack has it, basically.<br /><br />The puzzle was originally published in Shakhmaty v SSSR, 1969, and my source was Nunn, Solving in Style, Gambit 2002, p.71.<br /><br />The main line is 1.Ra8 Bc8 2.Kd1! Bf4+ 3.Kd3! Bb8 4.Kc4! Be6+ 5.Kc5+ Bc8 6.Kb6 Bc7+ 7.Kb5 Bb8/d8 8.Kxa4 Bd7+ 9.Kxa3 and mate in eleven.ejhhttps://www.blogger.com/profile/01582272075999298935noreply@blogger.comtag:blogger.com,1999:blog-37675897.post-40894058630690897602011-01-04T11:47:29.302+00:002011-01-04T11:47:29.302+00:00Got it. 1. Ra8 was right after all.
I'd s...Got it. 1. Ra8 was right after all. <br /><br />I'd say it has Geometry and Flow (though most problems with long solutions are likely to have that, I suspect). And then some slightly Paradoxical footwork around the a pawns, so as to win a couple to give black a move.Martin Smithhttps://www.blogger.com/profile/17616856982265044441noreply@blogger.comtag:blogger.com,1999:blog-37675897.post-27494947505313239882011-01-04T10:28:36.147+00:002011-01-04T10:28:36.147+00:00Sorry - the penny has dropped.
Back to square one....Sorry - the penny has dropped.<br />Back to square one.Martin Smithhttps://www.blogger.com/profile/17616856982265044441noreply@blogger.comtag:blogger.com,1999:blog-37675897.post-12556578902325272102011-01-04T10:07:13.066+00:002011-01-04T10:07:13.066+00:00I've seen this one before. I can't remembe...I've seen this one before. I can't remember the exact solution (except that it starts 1.Ra8 Bc8), but the idea is that the we get the following sequence (with the white king on b6 and both black bishops on the back rank)<br /><br />...Bc7+<br />Kb5 Bb8/d8<br />Kxa4 Bd7+<br />Kxa3<br /><br />...leaving black with an extra pawn move to ruin his stalemate defence.<br /><br />The key thing is how to manouevre the king within these ideas - it can never go to c5 with the white-squared bishop on the back rank, because then black just plays ...Bd6+ and ...Bf8.Jack Ruddhttps://www.blogger.com/profile/17433574267085964238noreply@blogger.comtag:blogger.com,1999:blog-37675897.post-730528640656339982011-01-04T10:03:56.840+00:002011-01-04T10:03:56.840+00:00Richard,
You mean we have to mate in ten, even if ...Richard,<br />You mean we have to mate in ten, even if it's possible to do it quicker?!Martin Smithhttps://www.blogger.com/profile/17616856982265044441noreply@blogger.comtag:blogger.com,1999:blog-37675897.post-1787050099615486362011-01-04T09:08:14.994+00:002011-01-04T09:08:14.994+00:00If you go Ra8 I'm going Bc8. Then I suppose yo...If you go Ra8 I'm going Bc8. Then I suppose you're going to take on a5.Richard Jameshttp://www.richardjames.org.uknoreply@blogger.comtag:blogger.com,1999:blog-37675897.post-41990467182788618602011-01-04T08:38:38.972+00:002011-01-04T08:38:38.972+00:00Something wrong here as 1. Ra8 is mate in 3, no?Something wrong here as 1. Ra8 is mate in 3, no?Martin Smithhttps://www.blogger.com/profile/17616856982265044441noreply@blogger.com