Tactics you can use from wtharvey.com
Here are some chess puzzles from the Old Benoni (ECO A43).

1.d4 c5
Solutions are between the brackets under each puzzle.
Drag your cursor from one bracket to the other.
The color disk on the diagram indicates who moves first.
a) 
Christian Krause vs Costin, Munich, 1914
rnb1kb1r/pp2nppp/3p4/2qNp3/4P3/5N2/PPP2PPP/R1BQKB1R w KQkq - 1 0
[ b4 Qc6 Bb5 Qxb5 Nc7+ ]
b) 
Gornevs vs Janis Mileika, Riga, 1958
r2q1bk1/pb1n1ppp/3p1n2/1BpPrNB1/8/2N2Q2/PP3PPP/R4RK1 w - - 1 0
[ Bxd7 Qxd7 Nh6+ if Kh8 Bxf6 gxf6 Qxf6+ Bg7 Nxf7+ Kg8 Nxe5 or if gxh6 Bxf6 ]
c) 
Konstantin Sakaev vs D Burmenko, Sochi, 1986
rnb2rk1/p2pppbp/6p1/2pPP3/1p4q1/2PB1NP1/PP1N1P1P/R2QK2R w KQ - 1 0
[ h3 Qh5 g4 Qh6 g5 Qh5 Ne4 d6 Ng3 ]
d) 
Robert Vogel vs Dirk Suhl, Germany, 1993
1r1qk2r/ppn1pnQp/6p1/2pP1b2/P1B5/2N5/1PP2PPP/R4RK1 w k - 1 0
[ d6 if e6 dxc7 Qxc7 Rfe1 or if Ne6 Bb5+ ]
e) 
Mark Hebden vs Stephen Mannion, Edinburgh, 1995
2bq1rk1/4rp1p/p2p1ppQ/1pbPn3/2p1P3/2N3NB/PPP2PPP/4RR1K w - - 1 0
[ f4 if Nd7 Nf5 or if Bxh3 gxh3 Nd7 Nh5 ]
1a) 
Christian Krause vs Costin
Old Benoni (A43) puzzles, pt. ii.
The color disk on the diagram indicates who moves first.
a) 
Henry Urday vs Aron Correa, Sao Paulo, 1995
r4rk1/p1np1pb1/4p2p/q1Nb3Q/NpB5/1P6/P1P2PPP/1R3RK1 w - - 1 0
[ Nb7 ]
b) 
Miguel Andres Sanchez vs Jose Diaz Iglesias, Asturias, 1996
r3nrk1/pbq3pp/1pnbpp2/2ppN1P1/3P1P2/2PBP3/PP1NQ2P/R1B2RK1 w - - 1 0
[ Bxh7+ if Kh8 Bg6 or if Kxh7 Qh5+ Kg8 g6 ]
c) 
Nenad Sulava vs Daniele Genocchio, Arco, 1997
r3kb1r/1b1p2pp/pp2pn2/3q4/Q2N4/3B4/PPPB1PPP/2KR3R w kq - 1 0
[ Nxe6 b5 Nc7+ Kf7 Qa5 ]
d) 
Fizza Shiraliyeva vs Monica Manicuta, Tallinn, 1997
r1b2rk1/ppq2ppp/2nbp3/3pN3/2pP1P2/2P1PR2/PPBn2PP/R1BQ2K1 w - - 1 0
[ Bxh7+ Kh8 Rh3 Rd8 Qh5 ]
e) 
Jouni Yrjola vs Olli Salmensuu, Vantaa, 1999
2kr1b1r/3bppp1/pq3n1p/2pP4/Pp3B2/2N1Q2P/1PP2PP1/R3KB1R w KQ - 1 0
[ a5 Qa7 Qxc5+ if Qxc5 Bxa6# ]
2e) 
Jouni Yrjola vs Olli Salmensuu
Old Benoni (A43) puzzles, pt. iii.
The color disk on the diagram indicates who moves first.
a) 
Shakhriyar Mamedyarov vs Rustam Samadli, Baku, 2000
r1q2rk1/p1nb1pbp/4p1p1/2pPN3/1pB2Q2/7P/PPP2PP1/1N1RR1K1 w - - 1 0
[ Nxd7 Qxd7 dxe6 Nxe6 Bxe6 ]
b) 
White mates in 3.
Daniel Wanzek vs Wolf Gerigk, Germany, 2000
r1b2qnr/pp1n1kbp/3p1pp1/2pP4/4N3/3B1N2/PPP2PPP/R1BQR1K1 w - - 1 0
[ Neg5+ ]
c) 
Kristjan Edvardsson vs Robert Hardarson, Reykjavik, 2000
rn1qkb2/p2p2pN/4pn2/2p3B1/2p5/8/PP3P1P/RN1QK2b w Qq - 1 0
[ Nxf6+ gxf6 Qh5+ Ke7 Bxf6+ Kxf6 Qh4+ ]
d) 
Slavisa Peric vs Manuel Lopez, Merida, 2002
rr4k1/3nppbp/p2p1np1/2pP4/4P3/q1N2N1P/2PBQPP1/1R3RK1 w - - 1 0
[ Ra1 if Qb2 Rfb1 Qxc2 Ne1 or if Qb4 Rfb1 ]
e) 
Andreas Juettner vs Stefan Winkler, Ditzingen, 2003
r3k2r/1p1nppbp/p2p1np1/2pP4/4P1P1/P1N2Q1P/2qBBP2/R4RK1 w kq - 1 0
[ Ra2 if Ne5 Qg2 or if Qb3 Rb1 ]
3c) 
Kristjan Edvardsson vs Robert Hardarson
Old Benoni (A43) puzzles, pt. iv.
The color disk on the diagram indicates who moves first.
a) 
Vera Nebolsina vs Ekaterina Prudnikova, Dagomys, 2006
r5k1/pp1rqpbp/3pbnp1/2p3B1/3nP2Q/2N2N2/PPP1BPPP/R4RK1 w - - 1 0
[ Nxd4 cxd4 e5 dxe5 Ne4 ]
b) 
Albert Ilkin vs Yuriy Aplaev, Ufa, 2007
rnbqkb1r/3pp1pp/p7/2pP1p2/PpN1n3/8/1PP1QPPP/R1B1KBNR w KQkq - 1 0
[ f3 if Nf6 Nd6# ]
c) 
Mahmoud Ali vs Omar Abdulwahab, Dubai, 2007
r2qr1k1/1p3p1p/p1bB2p1/2p1b3/4N3/8/PPP2PPP/R2QR1K1 w - - 1 0
[ Bxe5 if Bxe4 Qxd8 Raxd8 Rxe4 f6 Bxf6
or if Rxe5 Qxd8+ Rxd8 Nxf6+ Kg7 Rxe5 ]
d) 
Richard Bates vs Michael White, England, 2007
rn2k2r/pb4pp/4p3/qp2Np2/2pQ4/b1P5/P1PBPPPP/R3KB1R w KQkq - 1 0
[ Nxc4 bxc4 Qxg7 if Rf8 Qxb7 ]
e) 
White mates in 5.
Elena Cosma vs Monica Calzetta, Plovdiv, 2008
r3kb1r/1R2ppp1/p2pP1p1/q1pn4/P7/8/3N1PPP/1Q2KB1R w Kkq - 1 0
[ Rb8+ Rxb8 Qxb8+ Qd8 Bb5+ ]
4e) 
mate in 5
Elena Cosma vs Monica Calzetta
Old Benoni (A43) puzzles, pt. v.
The color disk on the diagram indicates who moves first.
a) 
Ruslan Avdeev vs Ekaterina Pischurina, Rybinsk, 2010
rnbqkb1r/pp3p1p/3p1np1/2pP2B1/8/5N2/PPP2PPP/RN1QKB1R w KQkq - 1 0
[ Bb5+ Bd7 Qe2+ Qe7 Bxf6 ]
b) 
Lexy Ortega vs Fred Hamperl, Forio, 2010
1rb1kb1r/p2p1ppp/2n2q2/1ppQN3/5B2/4P3/PPP2PPP/R3KB1R w KQk - 1 0
[ Nxc6 dxc6 Qe4+ Be7 Bxb8 ]
c) 
Roman Ribachenko vs Ivan Petrov, Vladivostok, 2011
r6r/1p1nkp1p/4bnp1/1pp1N1B1/2P1P3/8/PP4PP/R3KB1R w KQ - 1 0
[ Nxd7 Bxd7 e5 ]
d) 
Vladimir Malaniuk vs Katarzyna Murawko, Zakopane, 2011
1r3rk1/1bnq1p1p/pp4p1/2pP4/P2bNB2/7P/BP3PP1/R2QR1K1 w - - 1 0
[ Qxd4 cxd4 Nf6+ ]
e) 
Stig Martinsen vs Andrew Green, Hastings, 2012
r2qr1k1/pp3pbp/3Bbnp1/2p5/P3P3/2N2N1P/1Pn1BPP1/R2Q1RK1 w - - 1 0
[ Qxc2 Qxd6 e5 Bf5 Qxf5 ]
5a) 
Ruslan Avdeev vs Ekaterina Pischurina
Old Benoni (A43) puzzles, pt. vi.
The color disk on the diagram indicates who moves first.
a) 
Josep Solsona Manonelles vs Pau Nieto Badia, Balaguer, 2012
r1b1kb1r/pp1p1ppp/1q1Ppnn1/2p5/2P5/2N1PN2/PP2BPPP/R1BQK1R1 w Qkq - 1 0
[ Nb5 if Rb8 Ng5 Rg8 Nc7+ Kd8 Nxf7# ]
b) 
White mates in 5.
Marinos Petrogiannopoulos vs Julian Villca, Belorechensk, 2013
r1b1kb1r/pp3ppp/3Ppq2/3nN3/3Q4/1N4PP/PP2PPB1/2R1K2R w Kkq - 1 0
[ Qa4+ Kd8 Rxc8+ ]
c) 
White mates in 4.
Branko Stanojevic vs Zoran Colovic, Vrnjacka Banja, 2014
r3bb1r/2q3pp/p2Nk2n/2ppP3/Pp6/5Q2/1PP2PPP/R1B2RK1 w - - 1 0
[ Qh3+ if Ng4 Qxg4+ Kxe5 Re1+ or if Kxe5 Re1+ ]
d) 
Roman Ovetchkin vs Dmitri Borodinov, Vladivostok, 2014
rqb1k2r/p2nppbp/2B2np1/2pPN3/R7/2N5/2PB1PPP/3QK2R w Kkq - 1 0
[ Bf4 if Qb2 Nb5 O-O Nd3 or if Qb6 Nc4 Qd8 Bxa8 ]
e) 
Vitaly Kunin vs Frank Roeberg, Schwarzach, 2014
1rb2rk1/2n2p1p/pp1q2pQ/2ppR3/P7/2N5/1PP2PPP/4RBK1 w - - 1 0
[ Rh5 if gxh5 Qxd6 ]
6b) 
mate in 5
Marinos Petrogiannopoulos vs Julian Villca
Old Benoni (A43) puzzles, pt. vii.
The color disk on the diagram indicates who moves first.
a) 
Abdennour Djema vs Racym Ziani, Algier, 2015
rn2r1k1/pbq1ppbp/1p1p1np1/8/2BP4/2P2N2/PP2QPPP/R1B1RNK1 w - - 1 0
[ Bxf7+ Kxf7 Ng5+ if Kf8 Ne6+ or if Kg8 Qe6+ mates ]
b) 
Robert Tonkovic vs Nenad Trajkovic, Stari Banovci, 2015
1r1qkb1r/p4ppp/3p1n2/1npP4/8/P1N2N2/1P3PPP/R1BQ1RK1 w k - 1 0
[ Nxb5 Rxb5 Qe2+ ]
c) 
Hongjin Ahn vs Soon Tan, Gangneung, 2018
rn1qkb1r/pp1b1p2/3p1npp/1BpP2B1/P7/2N5/1PP2PPP/R2QK1NR w KQkq - 1 0
[ Qe2+ if Qe7 Bxf6 ]
d) 
Armas Kulmala vs Pekka Koski, Vammala, 1988
r3r1k1/p4ppp/5q2/2np1b2/4p3/1NP3P1/PPQ1P1BP/3RKR2 b - - 0 1
[ ...Nd3+ if Kd2 e3# or if exd3 exd3+ ]
e) 
Bernd Geisert vs Manfred Herbold, Ludwigshafen, 1994
r1b2rk1/p5pp/2pbp3/3p4/3Bnq2/1P3N2/P1P1BPPP/R2Q1RK1 b - - 0 1
[ ...Ng5 if g3 Nxf3+ or if Ne5 Bxe5 ]
7b) 
Robert Tonkovic vs Nenad Trajkovic, Stari Banovci
Old Benoni (A43) puzzles, pt. viii.
The color disk on the diagram indicates who moves first.
a) 
Antonio Bento vs Wanderley Soares Andrade, Brazil, 1995
r3kb1r/1b3ppp/p3p3/1pp1q3/8/2N1PB2/PPP2PPP/R3QRK1 b kq - 0 1
[ ...Bd6 ]
b) 
Stephan Schliebener vs Maximilian Tyrtania, Berlin, 1997
r2q1rk1/pp1b1p1p/3p2p1/2pP4/2Pb1Pn1/2NB1Q2/PP1B2PP/4RR1K b - - 0 1
[ ...Nxh2 if Qg3 Nxf1 or if Kxh2 Qh4+ ]
c) 
J Lundh vs Johnny Becker, Karlskrona, 1998
4rrk1/1pqn2bp/p2p4/2pP1p2/P4P2/2N1B2P/1P2Q1P1/R3R1K1 b - - 0 1
[ ...Rxe3 if Qxe3 Bd4 ]
d) 
Eszter Hidegh vs Janos Valis, Cseppko, 2000
r2qr1k1/pp1b1pbp/n2p2p1/2pP4/4NPn1/P2B1N2/1PP3PP/R1BQR1K1 b - - 0 1
[ ...c4 if Bf1 or Bxc4 Qb6+ ]
e) 
Christopher Kyeck vs Lennart Ritterhoff, Kiel, 2001
2r2rk1/pp1bppbp/nq1p2p1/2pP3n/4PP2/2N2N1P/PPP1B1P1/1RB1QR1K b - - 0 1
[ ...Bxc3 if Qxc3 Ng3+ ]
8c) 
J Lundh vs Johnny Becker
Old Benoni (A43) puzzles, pt. ix.
The color disk on the diagram indicates who moves first.
a) 
R Holland vs Chiel Van Oosterom, Hengelo, 2004
r4rk1/p1nqppb1/3p2Pp/1ppP4/2n1PN2/2N1B1Q1/PPP3PP/R4RK1 b - - 0 1
[ ...Nxe3 if Qxe3 Bd4 ]
b) 
Edward Tandi vs Ali Jaunooby, Coventry, 2005
r1bq1rk1/pp3ppp/2nb1n2/3Np3/1P6/P3PN2/1BP1BPPP/R2QK2R b KQ - 0 1
[ ...Nxd5 if Qxd5 Bxb4+ ]
c) 
Alisa Smirnova vs Viktoria Briks, Evpatoria, 2005
r1b1r1k1/pp3p2/5qpQ/3Pb3/8/3B4/P2N1PPP/1R3RK1 b - - 0 1
[ ...Bf4 if Ne4 Rxe4 ]
d) 
William Newrick vs Eric Palmer, Guernsey, 2006
r2qk2r/1b3pp1/p1np3p/1p1QpP2/1P2P3/2P3P1/P5BP/R1B1K1R1 b Qkq - 0 1
[ ...Qb6 if Rf1 Nd4 ]
e) 
Michal Tarkowski vs Daniel Gumula, Leba, 2007
r4rk1/1bq1bppp/p1n1p3/1p6/6n1/P1NBPN2/1P1BQPPP/2R2RK1 b - - 0 1
[ ...Nd4 if exd4 Bxf3 Qxf3 Qxh2# ]
9d) 
William Newrick vs Eric Palmer, Guernsey
Old Benoni (A43) puzzles, pt. x.
The color disk on the diagram indicates who moves first.
a) 
Nikolaos Savoglou vs Str Kakadelis, Athens, 2007
1r2r1k1/ppnBqpbp/3p4/2pP2p1/P1N5/2N1P1n1/1P1Q1PPP/R3R1K1 b - - 0 1
[ ...Bxc3 Qxc3 Ne4 Qc1 Qxd7 ]
b) 
Lorenzo Basso vs Nicolo Napoli, Foligno, 2009
r1bqk2r/pp1p1ppp/2n2n2/2b1p1B1/4N3/5N2/PPP1PPPP/R2QKB1R b KQkq - 0 1
[ ...Nxe4 if Qd5 Bxf2+ or if Be3 Bxe3 fxe3 d5 ]
c) 
Teemu Kilpi vs Sauli Tiitta, Finland, 2015
rnb1k1nr/1p2ppb1/pq1p4/3P4/P1B1P3/2N5/1PPB2PP/R2QK1NR b KQkq - 0 1
[ ...Rxh2 Rxh2 Qxg1+ if Bf1 Qxh2 or if Ke2 Bg4+ ]
d) 
Black mates in 6.
Mateja Popovic vs Sreten Djukanovic, Podgorica, 2019
1rb2rk1/5ppp/2p5/p6q/2BNp1n1/PP2P1P1/1B3PKb/R2Q3R b - - 0 1
[ ...Nxe3+ fxe3 Qh3+ Kf2 Qxg3+ ]
e) 
Philli Park-Tamati vs William Forster, Tauranga, 2020
rnbqk2r/pp1p1ppp/5n2/2b1p1B1/4N3/8/PPP1PPPP/R2QKBNR b KQkq - 0 1
[ ...Nxe4 if Qd5 Qxg5 Kd1 Nxf2+ or if Be3 Bxe3 fxe3 Qh4+ ]
10d) 
mate in 6
Mateja Popovic vs Sreten Djukanovic
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