White to play and checkmate in two moves
505
(D. Harry Rosenkilde - Das Rätsel, 20 Aug 1929)
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1.Bd5! (2.Qd2#)
1...Be3 2.Be4#
1...Bc3 2.Qe4#
Date added: 17/5/2021
506
(Bogdan Valerijovich ZHezherun - Талип Амиров MT-15 3rd Prize Кудесник, 2009)
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1.Qe1! zz
1...Kh3/g1N 2.Qg3#
1...g1Q/g1R 2.Qh4#
1...g1B 2.Qg3#/Qh4#
Date added: 17/5/2021
507
(Samuel Loyd - 1859)
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1.Qa6! zz
1...Kf3 2.Qf1#
1...Kg5 2.Qh6#
1...Ke5 2.Qd6
Date added: 17/5/2021
508
(Ivor L. Sanders - The Problemist, Mar 1993) ***
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1.Bh5+!
1...Kg2 2.Qh2#
1...Ng4 2.O-O#
Date added: 17/5/2021
509
(H. Kohser - Dresdner Anzeiger, 1923)
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1.Qa8! ~
2.Ba6#
2.Bb7#
2.Bh3#
2.Bg4#
2.Bf5#
2.Be6#
2.Bd7#
1...Ra2 2.Ba6#
1...Rb2 2.Bb7#
1...Rh2+ 2.Bh3#
1...Rg2 2.Bg4#
1...Rf2 2.Bf5#
1...Re2 2.Be6#
1...Rd2 2.Bd7#
1...Rc6+ 2.Be6#
1...Kg8 2.Be6#
Date added: 18/5/2021
510
(Nikolaj Ivanovich Belik - Шах-М (Боровичи), 1988)
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1.Kh4! zz
1...Qg2/Qe1 2.Qxg2#
1...Qf1 2.Qxg3#
1...Qd1/Qc1/Qb1/Qa1 2.Qxg3#/Qg2#
1...Qh1 2.Qxg3#/Qxh1#
1...Qf2 2.Qh1#
1...Qe3 2.Qg2#/Qh1#
1...Qd4/Qc5/Qb6/Qa7 2.Qxg3#/Qg2#/Qh1#
1...g2 2.Qh3#
Date added: 18/5/2021
511
(Vyacheslav Pavlovich Antipov - Шах-ВВ (Боровичи), 1998)
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1.Kh8! (2.Qc8#/Qd8#)
1...Ra6/Ra5/Ra4/Ra3/Ra2/Ra1 2.Qxb7#
1...Qc6/Qd5/Qe4/Qxf3 2.Qc8#
Date added: 19/5/2021
512
(Gunnar Frode Myhre - Troll, Sep 1992)
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1.Ba3! ~ 2.Qxb2#
1...Kxa3 2.Qa7#
Date added: 19/5/2021
513
(Bruno Passos )
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1. Ba6! [2. Qb7, Bb7#]
1. ... Nxa6 2. Qc6#
Date added: 215/5/2021
514
(Vladimir V. Nikitin - StrateGems, 2009)
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1.Qh4! zz
1...e6/e5 2.Qd8#
1...d6/d5 2.Qa4#
1...f6/f5 2.Qh5#
Date added: 21/5/2021
515
(Visvaldis M. Veders - Минимат, 1971)
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1.Bb1! zz
1...Kxb1/Ra3 2.Qc2#
1...Ka3 2.Qa2#
1...Ra2/Ra5/Ra6/Ra7/Ra8 2.Qxb4#
1...b3 2.Qc1#
Date added: 21/5/2021
516
(Sergej Petrovich Abramenko - TT-15 14th Place SuperProblem, 2012)
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1.Ke7 ! ~ 2.Qxd6 #
1...Rxd5 2.Qxd5 #
1...Rxc6 2.Nxc6 #
1...Rxd7 + 2.Nxd7 #
1...Rxe6 + 2.Qxe6 #
Date added: 22/5/2021