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MatPlus.Net  Forum General Abdurahmanovic 2 theme |
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| | | (1) Posted by Viktoras Paliulionis [Wednesday, Feb 24, 2021 17:43] | Abdurahmanovic 2 theme
The Encyclopedia of Chess Problems gives the following definition of the Abdurahmanovic 2 theme:
In the initial position white piece A pins black piece X. In the solution A pins another black piece Y after the king moves, thus changing the pin-line. The unpinned black piece X plays in next move.
Example:
ABDURAHMANOVIC,Fadil
1st pr. The Problemist 1990
 (= 5+9 )
h#2 2 sol.
8/2n5/p3kp2/1B1bn3/3b3r/8/Q1KB3r/4R3
1.Kf5 Qa5 2.Sg4 Bd3#
1.Kd6 Rd1 2.Bg2 Bb4#
In the first solution, if A is WQ, X is Bd5, then WQ should pin another black piece, and Bd5 should play, but it is not.
In the second solution, if A is WR, X is Se5, WR pins another black piece (Bd4), but X (Se5) should play, not Bd5.
Is this theme definition correct? Or maybe the example is wrong? Are there more examples on this theme?
| | | (2) Posted by Vilimantas Satkus [Thursday, Feb 25, 2021 12:35] |
Pažiūrėk 446190 Yacpdb
| | | (3) Posted by Viktoras Paliulionis [Thursday, Feb 25, 2021 13:48] |
https://www.yacpdb.org/#446190 also does not meet the definition.
Parrinello, Mario
Gaudium 2018
 (= 7+10 )
h#2 b) Move b4 d6
1B3nQ1/5r1b/1p3RP1/5rbp/RK6/P4k1q/6p1/8
a) 1.Kg4 g×h7 2.Rb5+ K×b5#
b) 1.Kg3 g×f7 2.Rd5+ K×d5#
In the solution wRf6 (piece A) should pin another black piece, but it is not.
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