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Here are some chess puzzles from the games of Yangyi Yu.
The color disk on the diagram indicates who moves first.

Solutions are between the brackets under each puzzle.
Drag your cursor from one bracket to the other.

a)
Haik Tamazian vs Yangyi Yu, Halkidiki, 2003
r3r1k1/p3bbp1/1p3p2/3n1P1P/2pPNq1P/8/PP2QBB1/3R1R1K b - - 0 1
[ ...Bd6 if Bg3 Rxe4 ]

b)
Yangyi Yu vs Robert Aghasaryan, Heraklio, 2004
r1b2r1k/1p3ppp/p2Np3/2q1PnB1/8/1PP3Q1/1P4PP/R4R1K w - - 0 1
[ Rxf5 if exf5 Bf6 mates ]

c)
Yangyi Yu vs Simon Hanninger, Taby, 2007
1rb2rk1/2q2pbp/pp1p2p1/8/P2B2n1/2N1Q3/1PP1BPPP/3R1RK1 w - - 0 1
[ Bxg4 Bxg4 Bxg7 if Kxg7 Qd4+ ]

d)
Yangyi Yu vs Xiu Deshun, Beijing, 2009
5r1k/1pq1nr1p/p7/4ppB1/7Q/1PP4P/P4PR1/6RK w - - 0 1
[ Bh6 if Re8 Bg7+ mates ]

Yu's Puzzles, Part II. White to move and win except where noted.
a)
Yangyi Yu vs Wan Yunguo, Beijing, 2010
1r6/1P3pk1/2R3p1/3qp2p/7P/6P1/2Q2P2/6K1 w - - 0 1
[ Rxg6+ if fxg6 Qc7+ ]

b)
Yangyi Yu vs Zeng Chongsheng, Guanzhou, 2010
r2qk2r/1b1nbppp/pn1p4/1p2pPP1/3NP3/2N1B3/PPP3BP/R2Q1R1K w kq - 0 1
[ Ne6 fxe6 Qh5+ g6 fxg6 Nc5 g7+ ]

c)
Yangyi Yu vs Zhou Jianchao, Hefei, 2010
4r1k1/1pp2pp1/6np/p1qP1N2/2P1r3/1P4PP/P2Q1R1K/5R2 w - - 0 1
[ Nxg7 if Kxg7 Rxf7+ Kg8 Qxh6 mates ]

d)
Andrei Volokitin vs Yangyi Yu, Moscow, 2011
k7/1p3p2/p7/4QPPp/8/P3K3/1Pr1R2P/1q6 b - - 0 1
[ ...Qg1+ ]

e)
Yangyi Yu vs Surya Shekhar Ganguly, Jakarta, 10/15/2012
r3k2r/p1pp1pb1/b1p3pp/3nP1B1/2P1N3/8/PP1K1PPP/R4B1R w kq - 1 0
[ cxd5 if Bxf1 Bf6 ]

Yu's Puzzles, Part III. The color disk on the diagram indicates who moves first.
a)
Yunguo Wan vs Yangyi Yu, Beijing, 9/25/2012
2r3k1/5pb1/4p2p/1B6/Pp3Q2/1R3P1P/1qP3P1/7K b - - 0 1
[ ...Qa1+ ]

b)
White mates in 3.
Yangyi Yu vs Throstur Thorhallsson, Reykjavik, 2/16/2013
8/2Q4p/4q1k1/1p1b2p1/1P2p1NP/2P3K1/5PP1/8 w - - 1 0
[ h5+ ]

c)
Yangyi Yu vs Saleh Salem, Kocaeli, 9/16/2013
1rk1n3/1p1nr2p/1pp3p1/PP6/2P5/2N1NpPB/5K1P/3R4 w - - 1 0
[ Nd5 cxd5 Nxd5 Rg7 Nxb6+ Kc7 Nxd7 Ra8 b6+ Kc6 Rd5 ]

d)
Black mates in 4.
Jon Hardarson vs Yangyi Yu, Reykjavik, 2/16/2013
r7/4Qpk1/6qp/4P3/1r6/1b6/1PPR2PP/1K2R3 b - - 0 1
[ ...Ra1+ Kxa1 Qa6+ Kb1 Qa2+ ]

e)
Alexander Beliavsky vs Yangyi Yu, Tromsoe, 8/13/2013
r4rk1/ppq1nppp/4b3/1Bp5/2P1P3/P4P2/1B2QP1P/3RK2R b K - 0 1
[ ...a6 Ba4 Qa5+ ]

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Yu's Puzzles, Part IV. The color disk on the diagram indicates who moves first.
a)
S P Sethuraman vs Yangyi Yu, Sharjah, 2014
3rrbk1/1bq4p/pp2p1p1/7n/1PP1B3/P4NP1/3BQ2P/2R2RK1 b - - 0 1
[ ...Nxg3 hxg3 Qxg3+ Qg2 Qxg2+ w/Bxe4 ]

b)
Xiangyu Xu vs Yangyi Yu, Jiaxing, 2014
8/4R3/8/3b2pk/5B2/8/r6P/6K1 b - - 0 1
[ ...Rg2+ ]

c)
White mates in 4.
Yangyi Yu vs Di Li, China, 2015
7Q/5pRp/1p2q1p1/4p2k/4P2P/6P1/5bK1/8 w - - 1 0
[ Rxh7+ Kg4 Qd8 ]

d)
Yangyi Yu vs Parham Maghsoodloo, Doha, 2016
2rnk2r/1q3pbp/p3p1p1/1p2Pn2/2pNQP2/2N1B3/PPP3PP/2KR3R w k - 1 0
[ Nxf5 if gxf5 Rxd8+ ]

Yu's Puzzles, Part V. The color disk on the diagram indicates who moves first.
a)
Black mates in 4.
Shanglei Lu vs Yangyi Yu, Shenzhen, 2016
1k1b4/1p1QN1p1/8/q7/1pP1P2p/2nK3P/P1P3r1/5R2 b - - 0 1
[ ...Rg3+ Kd2 Qg5+ ]

b)
Yangyi Yu vs Alexander Motylev, Fufeng, 2017
r5k1/5pp1/pq5p/n3Q3/bp1NP3/4P3/1P4PP/1BR3K1 w - - 1 0
[ Nf5 if Qf6 Qxa5 Qxb2 Qc7 or if f6 Qd5+ ]

c)
Black mates in 3.
B Adhiban vs Yangyi Yu, Gibraltar, 2019
2krb3/ppp3Rp/8/8/3PP2P/2P2r2/qPK2P2/4Q2R b - - 0 1
[ 1...Ba4+ ]

d)
Black mates in 2.
Liren Ding vs Yangyi Yu, Saint Louis, 2019
8/p4p1k/6p1/2P3p1/2RQ1nP1/1P3P2/q3r3/R4K2 b - - 0 1
[ 1...Re1+ ]

e)
White mates in 6.
Yangyi Yu vs Shakhriyar Mamedyarov, Saint Louis, 2019
4Q3/1p6/p5qp/6pk/6b1/2R5/5PNK/8 w - - 1 0
[ 1.Nf4+ gxf4 2.Rc5+ Bf5 3.Rxf5+ Kg4 4.Qxg6+ ]


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