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		<title>Problem 835: Fadil Abdurahmanovic, Ioannis Kalkavouras - Helpmate</title>
		<description>Discuss Problem 835: Fadil Abdurahmanovic, Ioannis Kalkavouras - Helpmate</description>
		<link>http://www.kobulchess.com/en/problems/originals-2017/1142-fadil-abdurahmanovic-ioannis-kalkavouras-helpmate.html</link>
		<lastBuildDate>Mon, 19 Oct 2026 01:01:17 +0000</lastBuildDate>
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			<title>Nikola Predrag says:</title>
			<link>http://www.kobulchess.com/en/problems/originals-2017/1142-fadil-abdurahmanovic-ioannis-kalkavouras-helpmate.html#comment-8290</link>
			<description><![CDATA[Wel, I just wanted to illustrate the question of pure/convincing motivations for the play. The effect of pin is redundant in No.835 1.Sa8(unguard). In Yuri's 2nd example, 1.Sa5 is anti-dual choice as line interference + pin, since the interference 1.Ba5 (without pin) is not enough for 2...Qa6#?. So, the pin is thematic, but its importance is half-reduced in one phase. The half-motivating pin requires 2 white pieces. From the aspect of economy, it looks better to have only one, the mating piece, and to enrich the Grimshaw with reciprocal dual-avoidance 1.Be8 Bd3?, 1.Se8 Rd3+?]]></description>
			<dc:creator>Nikola Predrag</dc:creator>
			<pubDate>Fri, 26 May 2017 14:16:28 +0000</pubDate>
			<guid>http://www.kobulchess.com/en/problems/originals-2017/1142-fadil-abdurahmanovic-ioannis-kalkavouras-helpmate.html#comment-8290</guid>
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			<title>Rodolfo Riva says:</title>
			<link>http://www.kobulchess.com/en/problems/originals-2017/1142-fadil-abdurahmanovic-ioannis-kalkavouras-helpmate.html#comment-8289</link>
			<description><![CDATA[Brilliant! Ingenious reworking of the known scheme with anti-dual theme.]]></description>
			<dc:creator>Rodolfo Riva</dc:creator>
			<pubDate>Fri, 26 May 2017 13:35:32 +0000</pubDate>
			<guid>http://www.kobulchess.com/en/problems/originals-2017/1142-fadil-abdurahmanovic-ioannis-kalkavouras-helpmate.html#comment-8289</guid>
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			<title>Nikola Predrag says:</title>
			<link>http://www.kobulchess.com/en/problems/originals-2017/1142-fadil-abdurahmanovic-ioannis-kalkavouras-helpmate.html#comment-8286</link>
			<description><![CDATA[Yuri, почему нет h#2: White Qd8 Kf8 Sg6 Bb1 Rd1 Black Bb8 Rc8 Bc6 Sd6 Pd5 Pf5 Pc3 Ke3]]></description>
			<dc:creator>Nikola Predrag</dc:creator>
			<pubDate>Fri, 26 May 2017 10:24:18 +0000</pubDate>
			<guid>http://www.kobulchess.com/en/problems/originals-2017/1142-fadil-abdurahmanovic-ioannis-kalkavouras-helpmate.html#comment-8286</guid>
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			<title>Yuri BILOKIN says:</title>
			<link>http://www.kobulchess.com/en/problems/originals-2017/1142-fadil-abdurahmanovic-ioannis-kalkavouras-helpmate.html#comment-8285</link>
			<description><![CDATA[Ещё экономичнее на 2 фигуры (чёртов мередит) 8/Q1R5/1bn1K3/2r5/4p3/qp1k4/nB6/2R5 H#2 2.1... 5+8 1.Ba5 Rc3+ 2.Kd4 Rd7# 1.Sa5 Bc3 2.Kc4 Qa6#]]></description>
			<dc:creator>Yuri BILOKIN</dc:creator>
			<pubDate>Fri, 26 May 2017 06:58:34 +0000</pubDate>
			<guid>http://www.kobulchess.com/en/problems/originals-2017/1142-fadil-abdurahmanovic-ioannis-kalkavouras-helpmate.html#comment-8285</guid>
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			<title>Yuri BILOKIN says:</title>
			<link>http://www.kobulchess.com/en/problems/originals-2017/1142-fadil-abdurahmanovic-ioannis-kalkavouras-helpmate.html#comment-8284</link>
			<description><![CDATA[Можно экономичнее 8/2Q1R3/3bn1K1/4r3/1pr3p1/3p1k2/2nB4/q3R3 H#2 2.1... 5+10 1.Bc5 Re3+ 2.Kf4 Rf7# 1.Sc5 Be3 2.Ke4 Qc6#]]></description>
			<dc:creator>Yuri BILOKIN</dc:creator>
			<pubDate>Fri, 26 May 2017 06:41:39 +0000</pubDate>
			<guid>http://www.kobulchess.com/en/problems/originals-2017/1142-fadil-abdurahmanovic-ioannis-kalkavouras-helpmate.html#comment-8284</guid>
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			<title>Vitaly Medintsev says:</title>
			<link>http://www.kobulchess.com/en/problems/originals-2017/1142-fadil-abdurahmanovic-ioannis-kalkavouras-helpmate.html#comment-8275</link>
			<description><![CDATA[Diagram for Nikola's example given in comment#12 http://yacpdb.org/xfen/?8/2Q1R1p1/3bn1K1/4r1p1/1r4p1/3p1k2/2nB4/q3R3.png 1.Bc5 Re3+ 2.Kf4 Rf7# 1.Sc5 Be3 2.Ke4 Qc6# ]]></description>
			<dc:creator>Vitaly Medintsev</dc:creator>
			<pubDate>Tue, 23 May 2017 17:25:31 +0000</pubDate>
			<guid>http://www.kobulchess.com/en/problems/originals-2017/1142-fadil-abdurahmanovic-ioannis-kalkavouras-helpmate.html#comment-8275</guid>
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			<title>Nikola Predrag says:</title>
			<link>http://www.kobulchess.com/en/problems/originals-2017/1142-fadil-abdurahmanovic-ioannis-kalkavouras-helpmate.html#comment-8274</link>
			<description><![CDATA[Mentioning "different approaches" is a poor excuse for ignorance of the "whole truth". First I must see something from all sides and then I might comprehend what is relevant and what is just a delusion. Pin which requires two black moves can't be called "static". But that's just inadeqate wording, the question is indeed "what motivates the play?". Is bRc5 just a "static cookstopper" or its presence thematically motivates the play? h#1.5, with bPc5 (instead of bR) has only one solution, 1...Bc3 2.Kc4 Qa6# and the "try", 1...Rc3+? 2.Kd4 Rd7+ 3.Sxd7! Mating by 2.Rd7 requires extension to h#2 and the unguard by 1.Sa8! It's clear that wQa7 is idle in this case, so to "hide" such a terrible defect in the economy, another (lesser) defect is added, bRc5 instead of bP. So here, Vitaly is wright, the pin wQ-bR is NOT what relevantly motivates the play. wQ and bR artificially "justify" each other's presence without a thematic reason. However, the solution of this h#1.5, with bPc5, shows that bRc5 would require the extension to h#2 for a pure reason, so in No.835, 1.Se7! is motivated exclusively as an 'anticipatory selfpin'. Therefore, the static cookstopper becomes a thematic piece which requires the "selfpinnig play", but only in one phase. Just a rough example of purely motivated anticipatory selfpin in B1: h#2, W: Qc7,Re7,Kg6,Bd2,Re1 B: Pg7,Bd6,Se6,Re5,Pg5,Rb4,P g4,Pd3,Kf3,Sc2,Qa1]]></description>
			<dc:creator>Nikola Predrag</dc:creator>
			<pubDate>Tue, 23 May 2017 14:30:04 +0000</pubDate>
			<guid>http://www.kobulchess.com/en/problems/originals-2017/1142-fadil-abdurahmanovic-ioannis-kalkavouras-helpmate.html#comment-8274</guid>
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			<title>Vitaly Medintsev says:</title>
			<link>http://www.kobulchess.com/en/problems/originals-2017/1142-fadil-abdurahmanovic-ioannis-kalkavouras-helpmate.html#comment-8272</link>
			<description><![CDATA[Pins could be essential part of thematic content in the following mechanism showing mutual anticipatory Leibovici interferences on the same square: 2R5/QP2p3/5N2/r4rpK/1PPP1P2/p2k2p1/P1R1n3/B2b1n2 http://www.yacpdb.org/xfen/?2R5/QP2p3/5N2/r4rpK/1PPP1P2/p2k2p1/P1R1n3/B2b1n2.png 1.Rac5 Bc3 2.Kxc4 Qa6# 1.Rfc5 Rc3+ 2.Kxd4 Rd8# Though,something similar has been shown before - http://pdb.dieschwalbe.de/search.jsp?expression=PROBID=%27P0547847%27]]></description>
			<dc:creator>Vitaly Medintsev</dc:creator>
			<pubDate>Tue, 23 May 2017 11:52:00 +0000</pubDate>
			<guid>http://www.kobulchess.com/en/problems/originals-2017/1142-fadil-abdurahmanovic-ioannis-kalkavouras-helpmate.html#comment-8272</guid>
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			<title>Vitaly Medintsev says:</title>
			<link>http://www.kobulchess.com/en/problems/originals-2017/1142-fadil-abdurahmanovic-ioannis-kalkavouras-helpmate.html#comment-8271</link>
			<description><![CDATA[ No. I would be satisfied if there would be some function permutation between black knights - then the whole mechanism would be unified. Pins are irrelevant to this mechanism, on my opinion.]]></description>
			<dc:creator>Vitaly Medintsev</dc:creator>
			<pubDate>Tue, 23 May 2017 07:50:21 +0000</pubDate>
			<guid>http://www.kobulchess.com/en/problems/originals-2017/1142-fadil-abdurahmanovic-ioannis-kalkavouras-helpmate.html#comment-8271</guid>
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			<title>Vitaly Medintsev says:</title>
			<link>http://www.kobulchess.com/en/problems/originals-2017/1142-fadil-abdurahmanovic-ioannis-kalkavouras-helpmate.html#comment-8270</link>
			<description><![CDATA[ True. I'v missed that. This defect could be cured by adding WPc4 but I think it would be worse than static pin. So, I apologys. And I agree that my version is rather caricature. I bag the author's pardon.]]></description>
			<dc:creator>Vitaly Medintsev</dc:creator>
			<pubDate>Tue, 23 May 2017 07:30:39 +0000</pubDate>
			<guid>http://www.kobulchess.com/en/problems/originals-2017/1142-fadil-abdurahmanovic-ioannis-kalkavouras-helpmate.html#comment-8270</guid>
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