From caillaud1957 at gmail.com Mon Dec 5 17:55:54 2022 From: caillaud1957 at gmail.com (CAILLAUD Michel) Date: Mon, 5 Dec 2022 23:55:54 +0100 Subject: [Retros] New edition of the Champagne award Message-ID: Hello, This is also available on the WCCC2022 website. The main changes are : - a much better edition of the manuscript by Hannu Harkola. Thanks, Hannu! - the correction of the stipulation of 1st HM by Bojan Basic in section B (I mistakenly truncated it in the first edition...). Best, Michel -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: Champagne 2022.pdf Type: application/pdf Size: 406054 bytes Desc: not available URL: From keilhack at aol.com Sun Dec 25 09:32:00 2022 From: keilhack at aol.com (keilhack at aol.com) Date: Sun, 25 Dec 2022 14:32:00 +0000 (UTC) Subject: [Retros] Twoandahalf original retroproblems from Stuttgarter Zeitung References: <1577828813.4054407.1671978720167.ref@mail.yahoo.com> Message-ID: <1577828813.4054407.1671978720167@mail.yahoo.com> Werner Keym, Urdruck Stuttgarter Zeitung 8/8/3ppp2/3pkp2/3ppp2/4R3/4Q3/4K3 w - - 0 1 Mate in how many moves? a) as given b) rotated 90 degrees clockwisely (wKa4 etc.) c) moved one file to the right (wKf1 etc.) BerndSchwarzkopf, Urdruck Stuttgarter Zeitung 2b1k1b1/2p1N1p1/2p1p1p1/4K3/8/8/8/8 w - - 0 1 Black retracts one move, then Helpmate in one (meaning, instead of the retracted move Black moves so that White can mate immediately) How many solutions? Edwin Weller, 150 Exzentrische Schachaufgaben 1910, version 8/8/4p1p1/3pPkPp/3PpNpP/1B2PpP1/5K2/8 w - - 0 1 Mate in 4 moves. In the original version as well as in all previous reprints all chessmen are located one rank higher (wKf3, Bb4 etc.). What's the objection?? Best, Harald Keilhack -------------- next part -------------- An HTML attachment was scrubbed... URL: From keilhack at aol.com Sat Dec 31 05:15:09 2022 From: keilhack at aol.com (keilhack at aol.com) Date: Sat, 31 Dec 2022 10:15:09 +0000 (UTC) Subject: [Retros] Twoandahalf original retroproblems from Stuttgarter Zeitung: Solutions In-Reply-To: <1577828813.4054407.1671978720167@mail.yahoo.com> References: <1577828813.4054407.1671978720167.ref@mail.yahoo.com> <1577828813.4054407.1671978720167@mail.yahoo.com> Message-ID: <1014528844.5679267.1672481709496@mail.yahoo.com> Werner Keym, Urdruck Stuttgarter Zeitung 8/8/3ppp2/3pkp2/3ppp2/4R3/4Q3/4K3 w - - 0 1 Mate in how many moves? a) as given:?1.R:e4+ d5:e4 2.Qb5+ d5 3.Qb8#, analogous 1...f:e4 etc. Mate in three, the symmetry is kept, two linesb) rotated 90 degrees clockwisely (wKa4 etc.):?1.R:d4+ e5:d4 2.Qe7#; Mate in two. c) moved one file to the right (wKf1 etc.):?seemingly 1.Rg3 with mate in four (breaking the symmetry) 1...e3 (1...f3? 2.Qe3 f2 3.Q:f2#)2.Qc2+ e4 3.Qc5+ e5 4.Qc8#, but in fact the position is illegal ? none of the black pawns could stem from the a-file. BerndSchwarzkopf, Urdruck Stuttgarter Zeitung 2b1k1b1/2p1N1p1/2p1p1p1/4K3/8/8/8/8 w - - 0 1 Black retracts one move, then Helpmate in one (meaning, instead of the retracted move Black moves so that White can mate immediately) How many solutions? One solution. Black retracts?d7:Qe6, instead ...Kf8 1.N:g6#. The analogous line with back f7:Qe6 and ...Kd8 1.N:c6# would be illegal, as the bishop couldn't get to g8. Edwin Weller, 150 Exzentrische Schachaufgaben 1910, version 8/8/4p1p1/3pPkPp/3PpNpP/1B2PpP1/5K2/8 w - - 0 1 Mate in 4 moves. In the original version as well as in all previous reprints all chessmen are located one rank higher (wKf3, Bb4 etc.). What's the objection?? 1.Nd3!e4:d3 2.Ba2 Ke4 3.Bb1 Kf5 3.B:d3#. The original version is illegal, as none of the seven black pawns could stem from b7 (corrected version by W. Keym). Best, Harald Keilhack -------------- next part -------------- An HTML attachment was scrubbed... URL: From elkies at math.harvard.edu Sat Dec 31 20:10:26 2022 From: elkies at math.harvard.edu (Elkies, Noam) Date: Sat, 31 Dec 2022 20:10:26 -0500 Subject: [Retros] Happy New Year Message-ID: It's that time of the year again: https://www.janko.at/Retros/d.php?ff=r3kn1r/pppbnppp/1q1p1b2/3Kp3/2B1P2P/4R3/PPPPNPP1/RNBQ4 Proof game in 10.0; how many solutions? (C+ Popeye) Wishing all a healthy and happy C(24,3) - 1, --Noam D. Elkies