[Event ""]
[Site ""]
[Round ""]
[White "How subtle are you?"]
[Black "Study 1"]
[Result "*"]
[FEN "8/p7/p7/8/3K4/1k6/1P6/8 w - - 0 1"]
[Time "23:53:09"]

1. Kd5 (1. Kc5 a5 2. Kb5 (2. Kc6 a4 (2.. Kc4 3. Kb7 a4 4. Ka6 Kb4) 3. Kb5)
2.. a4 3. Ka5 a6) 1.. Kxb2 (1.. Kb4 2. Kc6 a5 3. Kb7 a4 4. Ka6 Kb3 5. Kb5
$1 a6+ 6. Ka5 {Draws}) 2. Kc4 Ka3 3. Kc3 a5 4. Kc2 {Draws} *

[Event ""]
[Site ""]
[Round ""]
[White "Have you ideas?"]
[Black "Study 2"]
[Result "*"]
[FEN "8/p7/Pp6/1P3K2/4P3/8/7k/b7 w - - 0 1"]
[Time "21:55:43"]

1. e5 Bxe5 (1.. Bc3 2. e6 Bb4 3. Ke5 Kg3 4. Kd5 Kf4 5. Kc6 Ke5 6. Kb7 Kd6
7. e7) 2. Ke4 $1 (2. Kxe5 Kg3 3. Kd6 Kf4 4. Kc7 Ke5 5. Kb7 Kd6 6. Kxa7 (6.
Kc8 Ke7 $1) 6.. Kc7) 2.. Kg3 3. Kd5 Kf4 4. Kc6 Ke4 5. Kb7 Kd5 6. Kxa7 {Wins
} *

[Event ""]
[Site ""]
[Round ""]
[White "How generous are you?"]
[Black "Study 3"]
[Result "*"]
[FEN "6k1/bp3pp1/7p/1q1B4/3PQp2/P5Pb/1P3B1P/6K1 w - - 0 1"]
[Time "22:13:56"]

1. Kh1 Qf1+ 2. Bg1 Bxd4 3. Qe8+ (3. Bxf7+) (3. Qxd4 f3 4. Bxf7+ Kxf7 5.
Qd5+ Kg6 $1 6. Qe4+ Bf5 {Wins}) 3.. Kh7 4. Be4+ f5 *

[Event ""]
[Site ""]
[Round ""]
[White "Finish of an attack"]
[Black "Study 4"]
[Result "*"]
[FEN "3r1rk1/1b3p1p/p2q1Pp1/np4Q1/2p4R/6NP/PBB3PK/8 b - - 0 1"]
[Time "23:01:55"]

1.. Qd2 2. Nf5 $1 (2. Qxd2 Rxd2) 2.. Qxg5 3. Ne7+ Kh8 4. Nxg6+ Qxg6 (4..
Kg8 5. Ne7+ Kh8 6. Rxh7# {White mates}) (4.. fxg6 5. f7+) 5. Bxg6 Rd2 6.
Rxh7+ *

[Event ""]
[Site ""]
[Round ""]
[White "Make it conclusive (a)"]
[Black "Study 5"]
[Result "*"]
[FEN "8/1p2Bp1k/4b1p1/1P4P1/3R2np/N7/1r4P1/5K2 b - - 0 1"]
[Time "00:30:32"]

1.. h3 (1.. Ne3+ 2. Kg1 Bd5 3. Rxh4+ Kg8 4. Rh8+ Kxh8 5. Bf6+ Kg8 {[not  
given in text]} 6. Bxb2) 2. gxh3 (2. Kg1 Rxg2+ 3. Kf1 (3. Kh1 Nf2# {Black 
mates}) 3.. Rf2+ 4. Kg1 h2+) (2. Bd6 h2) 2.. Nh2+ 3. Kg1 {[or K-K1]   }
Nf3+ *

[Event ""]
[Site ""]
[Round ""]
[White "Make it conclusive (b)"]
[Black "Study 6"]
[Result "1-0"]
[FEN "1r4r1/2p3kp/4qNb1/b7/1Q6/2n3P1/P6R/K1B2R2 w - - 0 1"]
[Time "08:27:08"]

1. Rxh7+ (1. Nh5+ Bxh5 2. Qd4+ Kg6 3. Qd3+ Qe4) 1.. Bxh7 2. Nh5+ Kg6 (2..
Kh8 3. Qd4+) 3. Qg4+ Qxg4 4. Rf6+ Kxh5 5. Rh6# {White mates} 1-0

[Event "20th Soviet Championship "]
[Site ""]
[Round ""]
[White "Dozing on Olympus"]
[Black "Study 7"]
[Result "1/2-1/2"]
[FEN "2k4r/ppp3p1/5p2/1P6/r3P3/4K3/3R2B1/3R4 w - - 0 1"]
[Time "09:32:18"]

1. Kf2 (1. Rd8+ Rxd8 2. Bh3+ Rd7 3. Rxd7 a6 (3.. Ra3+ 4. Rd3+) 4. Rd4+) 1..
a6 1/2-1/2

[Event "A Hungarian Championship "]
[Site ""]
[Round ""]
[White "One move deep"]
[Black "Study 8"]
[Result "1-0"]
[FEN "4nr1k/2qr3p/p2b1p1Q/1p6/2p3R1/P7/1PB1R3/7K w - - 0 1"]
[Time "15:47:12"]

1. Re7 1-0

[Event ""]
[Site ""]
[Round ""]
[White "Several moves deep"]
[Black "Study 9"]
[Result "*"]
[FEN "2b2rk1/1pp2r2/p2q3p/3pb1pQ/8/2P1N2P/PP1B1PP1/4RRK1 b - - 0 1"]
[Time "15:57:00"]

1.. Bh2+ 2. Kh1 Rxf2 3. Rxf2 Rxf2 4. Nxd5 *

[Event ""]
[Site ""]
[Round ""]
[White "Use of resources"]
[Black "Study 10"]
[Result "1-0"]
[FEN "r3r3/3R1Qpk/pqb1pb2/1p6/8/2N1P3/PP3PPP/2R3K1 w - - 0 1"]
[Time "21:42:39"]

1. Ne4 Bxb2 (1.. Bxe4 2. Qxf6 Rg8 3. Qh4+ Kg6 4. Qxe4+) 2. Ng5+ Kh6 3. g4
$1 g6 (3.. Kxg5 4. Qh5+ Kf6 5. Rf7# {White mates}) 4. h4 Rh8 5. Qh7+ Rxh7
6. Rxh7# {White mates} 1-0

[Event ""]
[Site ""]
[Round ""]
[White "Live dangerously"]
[Black "Study 11"]
[Result "*"]
[FEN "1Q3bk1/3b1p1p/5Pp1/1p6/2q2N2/4P1P1/rP4BP/5RK1 b - - 0 1"]
[Time "23:35:38"]

1.. Rxb2 2. Nd5 Rxg2+ 3. Kxg2 Bh3+ 4. Kxh3 Qxf1+ 5. Kh4 Qc4+ 6. Nf4 h6 7.
Kh3 Qf1+ 8. Kg4 g5 *

[Event ""]
[Site ""]
[Round ""]
[White "Tribulation - White to play"]
[Black "Study 12"]
[Result "*"]
[FEN "4k3/8/1r3PP1/6K1/8/8/8/8 w - - 0 1"]
[Time "17:53:31"]

1. Kh6 Rxf6 (1.. Kf8 2. Kh7 Rb8) 2. Kh7 Rf1 3. g7 Rh1+ 4. Kg8 (4. Kg6 Rg1+
5. Kf6 Rg2) 4.. Rg1 *

[Event ""]
[Site ""]
[Round ""]
[White "Tribulation - Black to play"]
[Black "Study 12"]
[Result "*"]
[FEN "4k3/8/1r3PP1/6K1/8/8/8/8 b - - 0 1"]
[Time "17:41:04"]

1.. Kf8 2. Kh6 (2. Kf5 Rb1 3. Ke6 (3. g7+ Kf7) (3. Kg5 Rf1) 3.. Rg1 4. Kf5
Rb1) 2.. Rxf6 (2.. Rb5 3. f7 (3. g7+) 3.. Rb1) 3. Kh7 *

[Event ""]
[Site ""]
[Round ""]
[White "Idle curiosity 1"]
[Black "Study 13"]
[Result "1-0"]
[FEN "7k/4K1pp/7N/8/8/8/8/B7 w - - 0 1"]
[Time "08:09:52"]

1. Bf6 gxf6 2. Kf8 f5 3. Nf7# {White mates} 1-0

[Event ""]
[Site ""]
[Round ""]
[White "Idle curiosity 2"]
[Black "Study 13"]
[Result "1-0"]
[FEN "7B/8/8/8/8/N7/pp1K4/k7 w - - 0 1"]
[Time "08:18:40"]

1. Kc3 b1=Q (1.. b1=N+ 2. Kc2+ Nc3 3. Bxc3# {White mates}) 2. Nc2+ Qxc2+ 3.
Kxc2# {White mates} 1-0

[Event ""]
[Site ""]
[Round ""]
[White "Difficult defence"]
[Black "Study 14"]
[Result "*"]
[FEN "1q6/1r1nk3/Q1Rp1pp1/1P1Pp1p1/1K2P3/5P1P/6P1/5B2 b - - 0 1"]
[Time "09:19:56"]

1.. Ra7 (1.. Nc5 2. Qa5 Ra7 3. Rc8 Rxa5 4. Rxb8 Ra1 5. Bc4) 2. Qc8 Ra4+ 3.
Kxa4 (3. Kb3 Qa7) (3. Kc3 Qa8) 3.. Nb6+ 4. Rxb6 Qxc8 *

[Event ""]
[Site ""]
[Round ""]
[White "Tactical complex "]
[Black "Study 15"]
[Result "*"]
[FEN "r4rk1/1b3ppp/4p3/p3P3/1pP1n2q/3BP3/2QB1PPP/R4RK1 w - - 0 1"]
[Time "16:31:32"]

1. g3 Qg4 (1.. Ng5 2. gxh4 (2. f3 Bxf3) 2.. Nh3# {Black mates}) 2. f3 *

[Event ""]
[Site ""]
[Round ""]
[White "Unexpected aggression"]
[Black "Study 16"]
[Result "*"]
[FEN "2rn1r1k/1q2bppp/p3bn2/1p2N3/1PpP4/P1N1Q3/1B3PPP/1B1RR1K1 w - - 0 1"]
[Time "20:42:23"]

1. d5 Nxd5 (1.. Bxd5 2. Nxd5 Nxd5 3. Rxd5 Qxd5 4. Qh6 gxh6 5. Nxf7+ Kg8 6.
Nxh6# {White mates}) 2. Nxd5 Bxd5 3. Qh6 Be4 4. Ng6+ *

[Event ""]
[Site ""]
[Round ""]
[White "Breaking & entering"]
[Black "Study 17"]
[Result "1-0"]
[FEN "2b5/2qrrp1k/5Rp1/2p4p/1pB1PR1P/1P1P2P1/1Q5K/8 w - - 0 1"]
[Time "22:25:11"]

1. R4f5 (1. g4 Rd4 2. gxh5 Bf5 $1 3. Kg3 Kg7 4. Ra6 Bc8) (1. e5 Qxe5 2.
Rxf7+ Kh6 $1 3. Qc1 Qe3) 1.. gxf5 (1.. Qd8 2. Bxf7 gxf5 3. Rh6+ Kxh6 4.
Qf6+) (1.. Kh6 2. Rxh5+ (2. Qd2+ Kg7 (2.. Kh7 3. Rxh5+) 3. Qg5) 2.. Kxh5 3.
Rf5+ gxf5) 2. Rh6+ Kxh6 3. Qh8+ Kg6 4. exf5+ Kxf5 5. Qxh5+ Kf6 6. Qg5# {
White mates} 1-0

[Event ""]
[Site ""]
[Round ""]
[White "Thief in the night"]
[Black "Study 18"]
[Result "0-1"]
[FEN "3r4/1ppb1ppk/p6p/4n1PQ/4Pq2/2P2p2/PP3P1P/R3RBK1 b - - 0 1"]
[Time "09:54:04"]

1.. Rh8 2. gxh6 (2. Red1 {any move} g6 3. Qxh6+ Kg8) 2.. g6 0-1

[Event ""]
[Site ""]
[Round ""]
[White "Diagnosis "]
[Black "Study 19"]
[Result "*"]
[FEN "4B1bk/6p1/6P1/6K1/8/3B4/8/8 b - - 0 1"]

*

[Event ""]
[Site ""]
[Round ""]
[White "Rookonstruction 1"]
[Black "Study 20"]
[Result "*"]
[FEN "3K1k2/3P4/8/8/8/8/7R/3r4 w - - 0 1"]
[Time "22:19:45"]

1. Rf2+ Kg7 2. Rc2 Kf7 3. Kc7 Ke7 4. Re2+ *

[Event ""]
[Site ""]
[Round ""]
[White "Rookonstruction 2"]
[Black "Study 20"]
[Result "*"]
[FEN "3K1k2/3P4/8/8/8/8/7R/5r2 w - - 0 1"]
[Time "22:26:28"]

1. Rc2 Rd1 2. Kc7 Ke7 3. Re2+ *

[Event ""]
[Site ""]
[Round ""]
[White "Rookonstruction 3"]
[Black "Study 20"]
[Result "*"]
[FEN "3K1k2/3P4/8/8/8/8/7R/r7 w - - 0 1"]
[Time "23:18:53"]

1. Rf2+ Kg7 2. Rc2 Ra8+ 3. Kc7 Ra7+ 4. Kc8 Ra8+ 5. Kb7 Rd8 6. Kc7 *

[Event ""]
[Site ""]
[Round ""]
[White "Rookonstruction 4"]
[Black "Study 20"]
[Result "*"]
[FEN "3K1k2/3P4/8/8/8/8/7R/2r5 w - - 0 1"]
[Time "23:23:37"]

1. Rf2+ Kg7 2. Rf4 $1 Rc2 3. Ke7 Re2+ 4. Kd6 Rd2+ 5. Ke6 Kg6 (5.. Re2+ 6.
Kd5 $1 Rd2+ 7. Rd4) 6. Rf8 *

[Event ""]
[Site ""]
[Round ""]
[White "Recovery"]
[Black "Study 21"]
[Result "*"]
[FEN "r3k2r/ppqnbppb/2p1p2p/4N3/Q1pPP3/4B1P1/PP3PBP/R4RK1 w kq - 0 1"]
[Time "10:36:03"]

1. Nxc4 (1. Nxd7 b5) (1. Qxc4 Nxe5 2. dxe5 Qxe5 3. Bd4 Qg5 4. f4 Qg6) 1..
b5 2. Qa5 *

[Event ""]
[Site ""]
[Round ""]
[White "Prevention or cure"]
[Black "Study 22"]
[Result "*"]
[FEN "4r1k1/1p3p2/p1b2Qpp/8/2P5/1q6/5PPP/1B3RK1 b - - 0 1"]
[Time "16:11:42"]

1.. Qxc4 $1 2. Bxg6 Qxf1+ {White resigns} 3. Kxf1 Bb5+ *

[Event ""]
[Site ""]
[Round ""]
[White "Beat the computer"]
[Black "Study 23"]
[Result "1-0"]
[FEN "5Kbk/6pp/6P1/8/8/8/8/7R w - - 0 1"]
[Time "22:41:00"]

1. Rh6 gxh6 (1.. Be6 2. Rxh7# {White mates}) 2. g7# {White mates} 1-0

[Event ""]
[Site ""]
[Round ""]
[White "Is ingenuity enough?"]
[Black "Study 24"]
[Result "*"]
[FEN "7k/3PK3/8/2P2Q2/8/8/q7/8 b - - 0 1"]
[Time "08:24:09"]

1.. Qf7+ 2. Kd6 $1 Qg6+ 3. Kc7 Qf7 4. Qf6+ (4. Kc8 Qxf5) 4.. Qxf6 5. d8=Q+ 
*

[Event ""]
[Site ""]
[Round ""]
[White "Too early - or too late? 1"]
[Black "Study 25"]
[Result "*"]
[FEN "rnbk2r1/pp3p1p/2pb4/3P4/3q1p1P/2N5/PPPBQ1P1/R3KB1R w Q - 0 1"]
[Time "22:49:50"]

1. Qf2 (1. O-O-O Bg4) (1. Qd3 Re8+ 2. Be2 Qxd3 3. cxd3 cxd5 4. Nxd5 Bg4 5.
Nc3 Nc6) 1.. Qxf2+ 2. Kxf2 Bc5+ 3. Kf3 (3. Ke2) (3. Ke1) 3.. Rg3+ 4. Kxf4
Bd6+ *

[Event ""]
[Site ""]
[Round ""]
[White "Too early - or too late? 2"]
[Black "Study 25"]
[Result "*"]
[FEN "rnbk2r1/pp3p1p/2pb4/3P4/3q1p1P/2N5/PPPBQ1P1/R3KB1R w Q - 0 13"]
[Time "22:58:32"]

13. O-O-O Bg4 14. Qe4 Qxe4 15. Nxe4 Bxd1 16. Nxd6 Bh5 17. Bxf4 cxd5 18.
Nxf7+ *

[Event ""]
[Site ""]
[Round ""]
[White "Latet anguis in herba"]
[Black "Study 26"]
[Result "*"]
[FEN "r1b2rk1/pp2ppbp/2np1np1/q1p5/2PPP3/2N1BN1P/PP1Q1PP1/R3KB1R w KQ - 0 9"]
[Time "08:13:26"]

9. Be2 cxd4 10. Nxd4 (10. Bxd4 Nxe4 11. Nxe4 Qxd2+) 10.. Nxd4 11. Bxd4 (11.
Qxd4 Nxe4 12. Qxe4 Bxc3+) 11.. Nxe4 12. Nxe4 Qxd2+ 13. Kxd2 Bxd4 *

[Event ""]
[Site ""]
[Round ""]
[White "Planning a development "]
[Black "Study 27"]
[Result "*"]
[FEN "r1bq1r1k/pp4pp/2p1p2n/3pPp2/2P1n3/2NBP2P/PPQB1PP1/2KR3R w - - 0 1"]
[Time "14:38:57"]

1. Be1 (1. Rhf1) (1. Rdf1 Nf7 (1.. Qc7 2. f4 (2. Bxe4 fxe4 3. f4 exf3) 2..
Ng3) 2. f4 (2. Bxe4 fxe4 3. f4 exf3) 2.. Ng3) 1.. Nf7 2. cxd5 exd5 3. f3
Nc5 4. Bf1 Nxe5 5. Nxd5 cxd5 6. Qxc5 Be6 7. Bc3 *

[Event ""]
[Site ""]
[Round ""]
[White "While Rome burns?"]
[Black "Study 28"]
[Result "*"]
[FEN "r5k1/p4pbp/3q4/1QpNp2b/4P3/8/PPP2PP1/R3K1N1 w Q - 0 1"]
[Time "16:18:42"]

1. f3 Rb8 2. Qc6 Qxc6 3. Ne7+ Kf8 4. Nxc6 Rxb2 (4.. Rb6 5. Nxa7 Rxb2 6.
O-O-O Rxa2 7. Rd8+ Ke7 8. Nc6+ Ke6) 5. O-O-O *

[Event ""]
[Site ""]
[Round ""]
[White "Greek gift?"]
[Black "Study 29"]
[Result "1-0"]
[FEN "8/8/5p2/8/p3NKpk/7p/7P/8 w - - 0 1"]
[Time "08:17:33"]

1. Ng3 (1. Nc3 g3 2. hxg3+ Kh5 3. g4+ Kh4 4. Kf3 a3) 1.. a3 2. Kf5 a2 3.
Kg6 a1=Q 4. Nf5# {White mates} 1-0

[Event ""]
[Site ""]
[Round ""]
[White "Another Greek (or Trojan) gift"]
[Black "Study 30"]
[Result "*"]
[FEN "8/P7/1Pb5/1p6/8/6K1/k7/8 w - - 0 1"]
[Time "15:32:53"]

1. Kf4 Ka3 (1.. b4 2. Ke5 b3 3. Kd6 Bh1 4. Kc7 b2 5. b7 Bxb7 6. Kxb7 b1=Q+
7. Kc7 (7. Ka8)) 2. Ke5 Ka4 3. Kd6 Bh1 4. Kc7 *

[Event ""]
[Site ""]
[Round ""]
[White "What have you to lose?"]
[Black "Study 31"]
[Result "*"]
[FEN "8/5p2/7p/2pk3P/1p1p2P1/8/3K4/8 w - - 0 1"]
[Time "07:59:06"]

1. g5 Ke6 2. gxh6 Kf6 3. Kc2 c4 4. Kc1 c3 (4.. d3 5. Kd2 b3 6. Kc3) (4.. b3
5. Kb2) 5. Kc2 *

[Event ""]
[Site ""]
[Round ""]
[White "What is equality?"]
[Black "Study 32"]
[Result "*"]
[FEN "8/8/8/5bk1/8/3n1B2/r4PPP/5RK1 b - - 0 1"]
[Time "08:12:46"]

1.. Nxf2 2. Rxf2 Ra1+ 3. Rf1 Rxf1+ 4. Kxf1 Bh3 *

[Event ""]
[Site ""]
[Round ""]
[White "A luxury"]
[Black "Study 33"]
[Result "*"]
[FEN "r1b2rk1/3pb1pp/1pn1pp2/3pP3/3P4/3B1N2/PP1B1PPP/R4RK1 w - - 0 15"]
[Time "08:21:34"]

15. a3 fxe5 16. dxe5 Rxf3 $1 17. gxf3 Nxe5 18. Be2 Ba6 19. Bxa6 Nxf3+ 20.
Kg2 Nh4+ *

[Event ""]
[Site ""]
[Round ""]
[White "Out of trouble?"]
[Black "Study 34"]
[Result "*"]
[FEN "r4rk1/5p1p/bq2p1p1/p1R3Q1/Pp2P2P/5B2/1P3PP1/3R2K1 b - - 0 25"]
[Time "18:07:09"]

25.. f6 26. Qe3 Rad8 (26.. e5 27. Rd7 Rad8 (27.. Ra7) 28. Rcc7) 27. Rxd8
Rxd8 28. e5 fxe5 (28.. f5 29. Rc8 $1) 29. Qxe5 *

[Event ""]
[Site ""]
[Round ""]
[White "Assessment"]
[Black "Study 35"]
[Result "*"]
[FEN "5r2/R1R2pp1/6k1/P2p1p2/3P4/6nN/3r4/6K1 b - - 0 34"]
[Time "18:32:11"]

34.. Kh5 35. a6 Re8 36. Re7 Rxe7 37. Rxe7 Kg4 38. Nf2+ Kf3 39. Rc7 Ne2+ 40.
Kf1 Ra2 41. Nd3 Ng3+ (41.. Rxa6 42. Ne1+) 42. Ke1 Rxa6 43. Rxf7 Ke3 44. Nf2
g5 {White resigns} *

[Event ""]
[Site ""]
[Round ""]
[White "Technique in attack"]
[Black "Study 36"]
[Result "*"]
[FEN "r2qk3/pp2bp2/2p5/4Pp1p/P2PN3/5Q2/1r5P/3R1R1K w - - 0 1"]
[Time "08:17:54"]

1. Rg1 (1. Qxf5 Qd5) (1. d5 Qc7 (1.. cxd5 2. Rxd5 Qxd5 3. Nf6+) 2. Nf6+
Bxf6 3. exf6 Qd8 4. Rfe1+ Kf8 5. Qa3+) 1.. fxe4 2. Rg8+ Kd7 (2.. Bf8 3. Qa3
) 3. Rxd8+ *

[Event ""]
[Site ""]
[Round ""]
[White "Castling too early"]
[Black "Study 37"]
[Result "*"]
[FEN "2r1k2r/ppq2pp1/1n2p3/8/2PPN3/6P1/P3QP2/R1R3K1 b k - 0 1"]
[Time "16:44:29"]

1.. Ke7 (1.. Kf8) (1.. Nxc4 2. Nd2 (2. Rxc4 Qxc4 3. Nd6+) (2. d5 Qe5) 2..
b5 3. a4 a6) (1.. O-O 2. Nf6+ gxf6 3. Qg4+ Kh8 4. Kg2) *

[Event ""]
[Site ""]
[Round ""]
[White "Point of order (a)"]
[Black "Study 38"]
[Result "*"]
[FEN "6k1/1ppq2rn/7p/1P1bP2Q/1B2p1B1/P3P2P/8/4R1K1 w - - 0 1"]
[Time "22:10:48"]

1. Rd1 (1. Kh1 Be6 2. Rd1 Bxg4 3. Qxg4 Qxg4) 1.. c6 2. Kh1 *

[Event ""]
[Site ""]
[Round ""]
[White "Point of order (b)"]
[Black "Study 39"]
[Result "*"]
[FEN "8/8/P6p/p5b1/6P1/7k/8/6K1 w - - 0 1"]
[Time "09:35:45"]

1. a7 (1. Kh1 Be3 2. g5 hxg5 3. a7 Bxa7 {Stalemate}) 1.. Be3+ 2. Kh1 Bxa7
3. g5 h5 4. g6 Bd4 5. g7 Bxg7 *

[Event ""]
[Site ""]
[Round ""]
[White "Point of order (c)"]
[Black "Study 40"]
[Result "*"]
[FEN "2br2k1/r3bppp/p1B1pn2/4p3/8/1PN3P1/P1P2P1P/R1B2RK1 w - - 0 1"]
[Time "11:22:57"]

1. Bb2 (1. Bg2 Rc7 2. Bb2 Rd2 3. Ne4) 1.. Rd2 2. Rac1 Rc7 3. Bg2 Bc5 (3..
Bb4) *

[Event ""]
[Site ""]
[Round ""]
[White "Order of advance"]
[Black "Study 41"]
[Result "*"]
[FEN "1rbqr1k1/5pbp/3p1np1/1ppPn3/4P1P1/2N2PNP/1P4B1/R1BQ1RK1 w - - 0 1"]
[Time "16:47:26"]

1. f4 (1. g5 Nfd7 2. f4 Nc4) 1.. Nexg4 $1 2. hxg4 Nxg4 3. Nce2 Qh4 4. Rf3
Qh2+ 5. Kf1 Qh4 6. Kg1 *

[Event ""]
[Site ""]
[Round ""]
[White "Embarras de richesses"]
[Black "Study 42"]
[Result "*"]
[FEN "rn1q1rk1/pbpnb1p1/1p1pp2p/4p1B1/2PP3P/2NB1N2/PPQ2PP1/3RK2R w K - 0 12"]
[Time "00:23:19"]

12. Be4 Nc6 13. Bxh6 gxh6 14. Bxc6 Bxc6 15. Qg6+ Kh8 16. Ng5 Nf6 17. Qxh6+
Kg8 18. Nxe6 Ne8 19. Rd3 Bf6 20. Qxf8+ *

[Event ""]
[Site ""]
[Round ""]
[White "Sudden activity"]
[Black "Study 43"]
[Result "*"]
[FEN "r2q1rk1/1pp2ppp/p2pbb2/n3p3/2P1P3/1PP2N2/P1B1QPPP/R1B1R1K1 b - - 0 14"]
[Time "09:05:01"]

14.. b5 15. cxb5 axb5 16. Bb2 (16. Qxb5 c6 17. Qe2 (17. Qb4 c5 18. Qb5 c4 (
18.. Qc7) (18.. Qe7) 19. b4 Nb3 20. Bxb3 cxb3 21. a4) 17.. Nxb3) 16.. c6 *

[Event ""]
[Site ""]
[Round ""]
[White "Avoidance of automatism"]
[Black "Study 44"]
[Result "*"]
[FEN "8/4k3/R2r3p/2B2P2/2P1p3/8/3r4/4K3 w - - 0 1"]
[Time "14:52:38"]

1. Rxd6 (1. Bxd6+ Rxd6 2. Rxd6 Kxd6) 1.. Rxd6 2. f6+ Ke6 3. Bxd6 Kxd6 4.
c5+ *

[Event ""]
[Site ""]
[Round ""]
[White "Winning chances"]
[Black "Study 45"]
[Result "*"]
[FEN "3r4/5p1k/4p3/1R5P/2p5/2p1P3/1p6/4R1K1 b - - 0 1"]
[Time "22:10:46"]

1.. Rd1 (1.. c2 2. Rxb2 Rd1 3. Rxc2 Rxe1+ 4. Kf2 Rh1 5. Rxc4 Rxh5 6. Kg3)
2. Rxd1 c2 *

[Event ""]
[Site ""]
[Round ""]
[White "Subtle Kings 1"]
[Black "Study 46"]
[Result "*"]
[FEN "8/Bpk5/8/P2K4/8/8/8/8 w - - 0 1"]
[Time "09:13:21"]

1. Kc5 (1. Kc4 b5+) (1. Kd4 Kc8 (1.. Kc6 2. Kc4 (2. Bb6 Kb5 (2.. Kd7 3. Kc5
Kc8 4. Ba7 Kc7 5. Kb5) (2.. Kd6 3. Kc4 Kc6 4. Kb4) 3. Kd5 Ka6 4. Kd6) 2..
b5+) 2. Kc5 b6+ (2.. b5 3. a6) 3. Kxb6) 1.. b6+ *

[Event ""]
[Site ""]
[Round ""]
[White "Subtle Kings 2"]
[Black "Study 46"]
[Result "*"]
[FEN "8/Bpk5/8/P2K4/8/8/8/8 b - - 0 1"]
[Time "09:16:04"]

1.. Kc8 2. Kc5 b5 3. a6 *

[Event ""]
[Site ""]
[Round ""]
[White "Zugzwang?"]
[Black "Study 47"]
[Result "*"]
[FEN "3k4/PKn4p/6p1/6P1/B7/2p5/8/8 b - - 0 1"]
[Time "08:16:45"]

1.. Na8 2. Kxa8 (2. Kc6 Ke7 3. Kd5 Nb6+ 4. Kd4 Kd6 5. Bb3 Kc7 6. Kxc3 Kb7
7. Bg8 Kxa7 8. Kd4 Nd7 9. Bxh7 Nf8 10. Bg8 Kb6 11. Ke5 Kc6 12. Kf6 Kd6 13.
Kf7 (13. Kg7 Ke5 $1) (13. Bb3 Nh7+) 13.. Ke5 $1) 2.. Kc7 *

[Event ""]
[Site ""]
[Round ""]
[White "Choice of goods "]
[Black "Study 48"]
[Result "*"]
[FEN "r2r2k1/1p3ppp/p4n2/3bp3/1PP1P3/3B3P/P5P1/R4RK1 w - - 0 1"]
[Time "16:29:30"]

1. exd5 e4 (1.. b5 2. cxb5 Nxd5 3. bxa6 (3. a3 Nf4 4. Bc4 axb5 5. Bxb5) 3..
Nxb4 4. Bc4 Ra7 5. Rxf7 Rxf7 6. Rf1 Nd5 7. Rd1 $1) 2. Be2 Rab8 3. a4 b5 *

[Event ""]
[Site ""]
[Round ""]
[White "Temptation "]
[Black "Study 49"]
[Result "*"]
[FEN "2r2rk1/3bqp2/p1pb3p/1p1p2p1/P2PnN2/1B1NPQ1P/1PR2PP1/R5K1 w - - 0 1"]
[Time "08:46:46"]

1. Bxd5 (1. Nh5) 1.. cxd5 2. Nxd5 (2. Rxc8 gxf4) 2.. Qe6 3. Rxc8 Rxc8 (3..
Qxd5 4. Rxf8+ Kxf8) 4. Qxe4 Qxe4 5. Nf6+ *

[Event ""]
[Site ""]
[Round ""]
[White "Has he enough?"]
[Black "Study 50"]
[Result "*"]
[FEN "1k5r/1P2q3/1Q6/7p/6p1/6P1/2R4P/7K w - - 0 1"]
[Time "15:31:25"]

1. Rc8+ Rxc8 2. Qa7+ Kxa7 3. bxc8=N+ *

[Event ""]
[Site ""]
[Round ""]
[White "Strange retreat "]
[Black "Study 51"]
[Result "*"]
[FEN "r2r3k/5p1p/2ppb1pq/1pn1p3/4P3/1PP1N1RP/P3QPP1/1B2R1K1 w - - 0 27"]
[Time "16:32:20"]

27. Nc2 f5 28. exf5 gxf5 29. Nd4 exd4 30. cxd4 f4 (30.. Ne4 31. Bxe4 fxe4
32. d5 Qf6 33. dxe6 d5) 31. Rc3 Bd5 32. dxc5 Qg7 (32.. f3 33. Qb2 (33. Qe7)
) 33. Qg4 $1 Rg8 (33.. Qxc3 34. Re7 Bg8 35. Qf5) 34. Qxg7+ *

[Event ""]
[Site ""]
[Round ""]
[White "Offer declined "]
[Black "Study 52"]
[Result "*"]
[FEN "2rb2k1/1q1b1p1p/n2p2p1/3Pp3/1P6/3BNN1P/5PP1/1Q2R1K1 b - - 0 34"]
[Time "08:17:18"]

34.. Nxb4 35. Re2 Ba5 36. Rb2 Rb8 37. Nd2 Qa7 38. Ndc4 Qc5 (38.. Bb5 39.
Rxb4) 39. Nxa5 Qxa5 40. Nc2 Nxd3 *

[Event ""]
[Site ""]
[Round ""]
[White "Evergreen problem "]
[Black "Study 53"]
[Result "*"]
[FEN "1r2k1r1/pbppRp1p/1bn2P2/8/Q7/B1PB1q2/P4PPP/3R2K1 b - - 0 20"]
[Time "19:16:43"]

20.. Nxe7 (20.. Kd8 21. Rxd7+ Kxd7 (21.. Kc8 22. Rd8+ Rxd8 (22.. Nxd8 23.
Qd7+) (22.. Kxd8 23. Be2+ Nd4 24. Bxf3 Bxf3 25. g3 Bxd1 26. Qxd1) 23. gxf3)
22. Bf5+ Ke8 23. Bd7+ Kd8 24. Bxc6+) 21. Qxd7+ Kxd7 22. Bf5+ Ke8 (22.. Kc6
23. Bd7# $1 {White mates}) 23. Bd7+ *

[Event ""]
[Site ""]
[Round ""]
[White "Super technique "]
[Black "Study 54"]
[Result "*"]
[FEN "8/8/pP1P3K/k2r4/Pp6/1P6/1P2R3/8 w - - 0 1"]
[Time "08:06:03"]

1. Re5 Rxe5 2. d7 Re6+ 3. Kg5 Rxb6 4. d8=N *

[Event ""]
[Site ""]
[Round ""]
[White "Per ardua"]
[Black "Study 55"]
[Result "*"]
[FEN "8/1p4p1/3Pp1p1/2P2pK1/Ppk5/8/8/4bN2 w - - 0 1"]
[Time "08:14:42"]

1. c6 bxc6 2. d7 Bc3 3. Nd2+ Kc5 4. Nb3+ Kc4 5. Na5+ Kc5 6. Nb7+ Kc4 7.
Nd6+ Kb3 8. Ne8 *

