White to play and checkmate in two moves

Problems 505 to 516

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