Euwe,Max – Speijer,Abraham [D30]
NED-ch05 Amsterdam (1), 24.07.1924

1.d4 d5 2.Nf3 Nf6 3.e3 c6 4.c4 e6 5.Nbd2 c5 6.Bd3 Nbd7 7.0-0 LiveBook: 42 Games 7…b6 D30: Queen’s Gambit Declined: Systems without Nc3 [7…Be7=] 8.cxd5+/- exd5

9.e4! Bb7 [9…dxe4+/- 10.Nxe4 Be7] 10.exd5 [10.e5+-] 10…Bxd5 [10…Nxd5+/= 11.Nb3 Be7] 11.Re1+ Be7 12.dxc5 [12.Qe2+/-] 12…Nxc5 13.Bb5+ Kf8 14.b3 Bb7 [14…h5+/=] 15.Bb2 Nd3 16.Bxd3! Qxd3 17.Rc1 Rd8?

[17…Bc5+/- was called for.] 18.Rxe7!+- Bxf3 [18…Kxe7 19.Ba3+] 19.Ba3 [ And not 19.gxf3 Kxe7 20.Qe1+ Kf8-/+] 19…Qa6?

[19…Bxd1? too greedy. 20.Re3+ Kg8 21.Rxd3+-; 19…Kg8+- 20.gxf3 h5] 20.Rcc7! White mates. 20…Qxa3 21.Rxf7+ Double Attack 21…Ke8 22.Qe1+ Accuracy: White = 57%, Black = 22%.
1-0

(59) Aljechin,Alexander – Euwe,Max [D17]
World Championship 16th NLD (1), 03.10.1935
[Tactical Analysis 2.10 (10s)]

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5 Nbd7 7.Nxc4 Qc7 8.g3 e5 9.dxe5 Nxe5 10.Bf4 Nfd7 11.Bg2 Be6 12.Nxe5 Nxe5 13.0-0 D17: Slav Defence: 5 a4 Bf5: Lines with 6 Nh4 and 6 Ne5 13…Be7 LiveBook: 4 Games 14.Qc2 Rd8 15.Rfd1N

Hoping for Nb5!White is slightly better. [Predecessor: 15.a5 a6 16.Ne4 f6 17.Nc5 Bd5 18.Bxd5 cxd5 19.Qa4+ Kf7 20.Nd3 Bd6 ½-½ (29) Capablanca,J-Marshall CC New York,NY 1931] 15…0-0 16.Nb5 Rxd1+ 17.Rxd1 Qa5 [17…Qb6+/=] 18.Nd4+/- Bc8

19.b4! Qc7 20.b5 c5 21.Nf5 aiming for Rd5. 21…f6 22.Ne3 Be6 [22…Kh8+/- might work better. 23.Nd5 Qd6] 23.Bd5+- Bxd5 24.Rxd5 Qa5? [24…b6+/- 25.Qe4 Bd8 26.Bxe5 fxe5 27.Rxe5 Qf7] 25.Nf5 Qe1+ [>=25…Bd8 26.Kg2 Qc7 27.Bxe5 (27.Qxc5 Qxc5 28.Rxc5 Bb6+/-) 27…fxe5 28.Rxc5 Qf7] 26.Kg2 Bd8 27.Bxe5 fxe5 28.Rd7 Threatening mate with Qc4+. 28…Bf6 29.Nh6+ Kh8 30.Qxc5 Double Attack Accuracy: White = 100%, Black = 33%.
1-0

(60) Aljechin,Alexander – Euwe,Max [D17]
World Championship 16th NLD (21), 19.11.1935
[Tactical Analysis 2.10 (10s)]

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5 Nbd7 7.Nxc4 Qc7 8.g3 e5 9.dxe5 Nxe5 10.Bf4 Nfd7 11.Bg2 Rd8 D17: Slav Defence: 5 a4 Bf5: Lines with 6 Nh4 and 6 Ne5 12.Qc1 f6 13.0-0 Be6N [Predecessor: 13…Be7 14.Nxe5 Nxe5 15.Nd5 Qd6 16.Nxe7 Qxe7 17.Be3 a6 18.Bb6 Rc8 19.Bc5 Qf7 20.f4 Nd7 21.Ra3 Kd8 22.Rd1 Re8 23.Bb6+ Ke7 24.Rxd7+ Kxd7 25.Qd2+ 1-0 (25) Winter,W-Gemzoe,J Hamburg 1930] 14.Nxe5 Nxe5 15.a5 a6 16.Ne4 LiveBook: 9 Games 16…Bb4 17.Nc5 Bc8 18.Bxe5 fxe5 19.f4 [White should play 19.Qc4= Rd4 20.Qc2] 19…Bd2!=/+ 20.Qc4 Rd4 21.Qb3 [21.Qc2!=/+] 21…exf4-/+ 22.gxf4 Qe7|^ Double Attack. Black has strong initiative. [ Don’t play 22…Bxf4?! 23.Ne6=; 22…Rxf4?! 23.Ne4=] 23.Nd3 Be6 [23…Qxe2 24.Rfe1!+/-] 24.Qa3 Bc4 25.Kh1 Qxa3 [ Not 25…Qxe2? 26.Rfe1!+-] 26.Rxa3 0-0 Black is clearly better. 27.Ra4 Rfd8 [ Avoid the trap 27…Bxf4?

28.b3!+-] 28.Ra3 Bxd3 29.exd3 Rb4 30.Rf2 Rxb2 31.Bf1 [31.Be4-/+] 31…Rd4 32.f5 Rf4 33.Rxf4 Bxf4-+ Endgame KRB-KRB 34.h3 Bd6 35.Ra1 Kf7 36.d4 Kf6 37.Re1 next Re6+ is good for White. 37…Bb4 38.Ra1 Rd2 39.Bc4 Rxd4 40.Be6 Rd3 Accuracy: White = 57%, Black = 74%.
0-1

(61) Aljechin,Alexander – Euwe,Max [D17]
World-ch15 Euwe-Alekhine +9-8=13 Netherlands (21), 19.11.1935
[Tactical Analysis 2.10 (10s)]

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5 Nbd7 7.Nxc4 Qc7 8.g3 e5 9.dxe5 Nxe5 10.Bf4 Nfd7 11.Bg2 Rd8 D17: Slav Defence: 5 a4 Bf5: Lines with 6 Nh4 and 6 Ne5 12.Qc1 f6 13.0-0 Be6N [Predecessor: 13…Be7 14.Nxe5 Nxe5 15.Nd5 Qd6 16.Nxe7 Qxe7 17.Be3 a6 18.Bb6 Rc8 19.Bc5 Qf7 20.f4 Nd7 21.Ra3 Kd8 22.Rd1 Re8 23.Bb6+ Ke7 24.Rxd7+ Kxd7 25.Qd2+ 1-0 (25) Winter,W-Gemzoe,J Hamburg 1930] 14.Nxe5 Nxe5 15.a5 a6 16.Ne4 LiveBook: 9 Games 16…Bb4 17.Nc5 Bc8 18.Bxe5 fxe5 19.f4 [19.Qc2=] 19…Bd2!=/+ 20.Qc4 Rd4 21.Qb3 [Better is 21.Qc2!=/+] 21…exf4-/+ Hoping for …Qe7. 22.gxf4 Qe7|^ Black is on the roll. [ Reject 22…Bxf4?! 23.Ne6=; 22…Rxf4?! 23.Ne4=] 23.Nd3 Be6 [23…Qxe2 24.Rfe1!+/-] 24.Qa3 Bc4 25.Kh1 Qxa3 [ Not 25…Qxe2? 26.Rfe1!+-] 26.Rxa3 0-0 27.Ra4 Black is clearly better. 27…Rfd8 [ Avoid the trap 27…Bxf4?

28.b3!+-] 28.Ra3 Bxd3 29.exd3 Rb4 30.Rf2 Rxb2 31.Bf1 Rd4 32.f5 Rf4 33.Rxf4 Bxf4-+ Endgame KRB-KRB 34.h3 Bd6 35.Ra1 Kf7 36.d4 Kf6 37.Re1 With the idea Re6+. 37…Bb4 38.Ra1 [38.Re2 is a better defense. 38…Rxe2 39.Bxe2] 38…Rd2 39.Bc4 Rxd4 40.Be6 Rd3 Accuracy: White = 43%, Black = 68%.
0-1

(63) Euwe,Max – Aljechin,Alexander [D17]
World Championship 17th NLD (1), 05.10.1937
[Tactical Analysis 2.10 (10s)]

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5 Nbd7 7.Nxc4 Qc7 8.g3 e5 9.dxe5 Nxe5 10.Bf4 Nfd7 11.Bg2 f6 12.0-0 Rd8 13.Qc1 D17: Slav Defence: 5 a4 Bf5: Lines with 6 Nh4 and 6 Ne5 13…Be6 14.Ne4N [Predecessor: 14.Nxe5 Nxe5 15.a5 a6 16.Ne4 Bb4 17.Nc5 Bc8 18.Ra4 Bxa5 19.Nd3 0-1 (29) Vidmar,M-Euwe,M Nottingham 1936] 14…Bb4 15.a5 0-0 16.a6 LiveBook: 3 Games 16…bxa6 17.Nxe5 Nxe5 18.Nc5 Bxc5! 19.Qxc5 g5 20.Be3 Bd5 21.Rxa6 Bxg2 22.Kxg2 Rf7 23.Rfa1 Qd6 24.Qxd6 Rxd6 25.Rxa7 Rxa7 26.Rxa7+/- Endgame KRB-KRN 26…Nc4

27.Bc5! Re6 28.Bd4 Rxe2 [>=28…g4] 29.Bxf6 g4 ( -> …Ne3+) 30.Kf1 Rc2 31.Rg7+ Kf8 32.Rxg4 Nxb2 33.Bxb2 Rxb2 KR-KR 34.Rc4 Rb6 35.Ke2 Kf7 36.Rh4 Kg6 37.Rf4 Rb3 38.Rc4 Rb6 39.Ke3 Kf5 40.g4+ Ke6

[40…Kg5+/- 41.f3 Rb5 42.Rxc6 h5] 41.f4!+- Kd5 [>=41…Rb2 42.Rxc6+ Kd5] 42.Rd4+ Ke6 43.f5+ Ke7 44.Re4+ Kf7 45.h4 Rb1 46.Kf4 [>=46.Rc4] 46…Rc1? [46…h6 was necessary. 47.g5 Rf1+ 48.Ke5 hxg5 49.hxg5 Rg1 50.g6+ Kg7] 47.Ra4 h6 [>=47…c5 48.Ra7+ Kg8] 48.Ra7+ Kg8 49.g5 Rc4+ 50.Ke5 Accuracy: White = 76%, Black = 40%.
1-0

(64) Aljechin,Alexander – Euwe,Max [D10]
World Championship 17th NLD (6), 16.10.1937
[Tactical Analysis 2.10 (10s)]

1.d4 d5 2.c4 c6 3.Nc3 dxc4 4.e4 e5 5.Bxc4N D10: Slav Defence: 3 cxd5 (without early Nf3) and 3 Nc3 [Predecessor: 5.dxe5 Qxd1+ 6.Kxd1 Be6 7.Nf3 Bc5 8.Ke2 Nd7 9.Be3 0-0-0 10.Rd1 Bxe3 11.Kxe3 Ne7 12.Nd2 b5 0-1 (34) Jordan,H-Drummond,R Toronto 1936] 5…exd4 6.Nf3 b5

[6…Bc5+/=] 7.Nxb5!+- Ba6 [>=7…cxb5 8.Bd5 Bc5 9.Bxa8 Ne7] 8.Qb3 White is clearly better. [ Don’t do 8.Qxd4 Bb4+ 9.Bd2 Bxd2+ 10.Nxd2 Qxd4] 8…Qe7 9.0-0 [ Resist 9.Nfxd4 Nf6+/-; 9.Nbxd4 Qb4+ 10.Nd2 Bxc4+-] 9…Bxb5 [ Much worse is 9…cxb5 10.Bd5] 10.Bxb5 Nf6 [>=10…Qb4] 11.Bc4 Nbd7 12.Nxd4 Rb8 13.Qc2 Qc5 14.Nf5 Ne5 15.Bf4 Nh5?

[15…g6 16.Ne3 Bd6 17.Bxf7+ Kxf7] 16.Bxf7+ [>=16.b4! Rxb4 17.Bxe5] 16…Kxf7 17.Qxc5 Bxc5 18.Bxe5 Rb5 19.Bd6 Black must now prevent a4. 19…Bb6 [>=19…g6 20.a4 gxf5 21.axb5 Bxd6 22.Rxa7+ Kf6] 20.b4 Rd8 21.Rad1 c5 22.bxc5 Bxc5 23.Rd5 Accuracy: White = 71%, Black = 24%.
1-0

(65) Aljechin,Alexander – Euwe,Max [E34]
World Championship 17th NLD (8), 21.10.1937
[Tactical Analysis 2.10 (10s)]

1.d4 Van Reek,J 1…Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.cxd5 Qxd5 6.e3 c5 7.a3 Bxc3+ 8.bxc3 Nbd7 LiveBook: 3 Games. E34: Nimzo-Indian: Classical: 4…d5 9.f3N [Predecessor: 9.Nf3 b6 10.c4 Qd6 11.Bb2 Bb7 12.Be2 Rc8 13.0-0 Be4 14.Qc3 0-0 15.Rad1 Rfd8 16.d5 ½-½ (56) Euwe,M-Botvinnik,M Nottingham 1936 EXT 2017 [Van Reek,J]] 9…cxd4 10.cxd4 Nb6 White has an edge. 11.Ne2 Bd7 12.Nf4 Qd6 13.Bd2 Rc8 14.Qb2 Nfd5 15.Nxd5 exd5 16.Bb4|^ White is pushing. 16…Qe6 17.Kf2 Na4 [17…f5=] 18.Qd2+/= b6 [Better is 18…f5+/=] 19.Ba6 Rb8?

[19…Rc4 keeps fighting.] 20.e4!+- b5 [20…dxe4 21.Rhe1] 21.Qf4 Rb6 22.exd5 Overworked Piece, Deflection 22…Qxd5 [>=22…Nb2 23.dxe6 Nd3+ 24.Kg3 Nxf4 25.exd7+ (25.Kxf4 g5+ 26.Kg3 fxe6+-) 25…Kxd7 26.Bxb5+ Rxb5 27.Kxf4 Re8] 23.Rhe1+ Be6 24.Rac1

White threatens Rc8+ and mate. 24…f6 25.Rc7 Threatening mate with Bxb5+! 25…Kd8 26.Rxa7 Accuracy: White = 84%, Black = 19%.
1-0

(66) Euwe,Max – Aljechin,Alexander [D17]
World-ch16 Alekhine-Euwe +10-4=11 Netherlands (1), 05.10.1937
[Tactical Analysis 2.10 (10s)]

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5 Nbd7 7.Nxc4 Qc7 8.g3 e5 9.dxe5 Nxe5 10.Bf4 Nfd7 11.Bg2 f6 12.0-0 Rd8 13.Qc1 D17: Slav Defence: 5 a4 Bf5: Lines with 6 Nh4 and 6 Ne5 13…Be6 14.Ne4N [Predecessor: 14.Nxe5 Nxe5 15.a5 a6 16.Ne4 Bb4 17.Nc5 Bc8 18.Ra4 Bxa5 19.Nd3 0-1 (29) Vidmar,M-Euwe,M Nottingham 1936] 14…Bb4 15.a5 0-0 16.a6 LiveBook: 3 Games 16…bxa6 [16…b5= 17.Ne3 Be7] 17.Nxe5+/= Nxe5 18.Nc5 Bxc5! 19.Qxc5 g5 20.Be3 Bd5 [20…Rf7+/=] 21.Rxa6+/- Bxg2 22.Kxg2 Rf7 23.Rfa1 Qd6 24.Qxd6 Rxd6 25.Rxa7 Rxa7 26.Rxa7 Endgame KRB-KRN 26…Nc4

27.Bc5! Re6 28.Bd4 Rxe2 [28…Nd6+/- keeps fighting. 29.e3 Nb5] 29.Bxf6+- g4 ( -> …Ne3+) 30.Kf1 Rc2 31.Rg7+ Kf8 32.Rxg4 Nxb2 33.Bxb2 Rxb2+/- KR-KR 34.Rc4 Rb6 35.Ke2 Kf7 36.Rh4 Kg6 37.Rf4 Rb3 38.Rc4 Rb6 39.Ke3 Kf5 40.g4+ Ke6 [40…Kg5+/- 41.f3 Rb5 42.Rxc6 h5] 41.f4+- Kd5?

[41…Kd6 42.Rd4+ Ke7] 42.Rd4+ Ke6 43.f5+ Ke7 44.Re4+ Kf7 45.h4 Rb1 46.Kf4 Rc1? [46…h6 was worth a try. 47.g5 Rf1+ 48.Ke5 Kg7] 47.Ra4 h6 [>=47…Re1 48.Ra7+ Kg8] 48.Ra7+ Kg8 49.g5 Rc4+ 50.Ke5 Accuracy: White = 89%, Black = 38%.
1-0

(70) Euwe,Max – Keres,Paul [E19]
NED m 3940 Netherlands (9), 1940
[Tactical Analysis 2.10 (10s)]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.0-0 0-0 7.Nc3 Ne4 8.Qc2 Nxc3 9.Qxc3 d6 10.Qc2 f5 11.Ne1 LiveBook: 11 Games 11…Qc8N E19: Queen’s Indian: Old Main Line with 7…Ne4 8 Qc2 Nxc3 8 Qxc3 [Predecessor: 11…Bxg2 12.Nxg2 c6 13.e4 Na6 14.exf5 exf5 15.Qa4 Qc8 16.Re1 Bf6 17.Bf4 Bxd4 18.Rad1 Be5 19.Bxe5 dxe5 20.Rxe5 ½-½ (31) Alekhine,A-Keres,P Buenos Aires 1939] 12.e4 Nd7 13.d5 [13.exf5+/= exf5 14.b3] 13…fxe4=/+ Black is slightly better. 14.Qxe4 Nc5 15.Qe2 Bf6 16.Bh3 Re8|^ Black fights for an advantage. 17.Be3 Qd8! 18.Bxc5 exd5 19.Be6+ Double Attack [19.Be3= d4 20.Bg2] 19…Kh8-/+ 20.Rd1 And now Ba3 would win. 20…dxc5 21.Ng2 d4 22.f4

[22.Rfe1-/+] 22…d3!-+ 23.Rxd3

23…Qxd3! 24.Qxd3 Hoping for Bd5. 24…Bd4+ 25.Rf2 Qe2 is the strong threat. 25…Rxe6 [ Don’t take 25…Bxf2+ 26.Kxf2 Rxe6 27.Nh4=/+] 26.Kf1 White wants to play Re2. 26…Rae8 [26…Bxf2-+ 27.Kxf2 Rae8] 27.f5 [27.Rc2-/+] 27…Re5! 28.f6 gxf6! [ Weaker is 28…Bxf2 29.Kxf2 gxf6 30.Nf4-/+] 29.Rd2 Bc8 30.Nf4 [>=30.g4 Bxg4 31.Rf2] 30…Re3 31.Qb1

31…Rf3+! 32.Kg2

32…Rxf4! 33.gxf4 Rg8+ 34.Kf3 Bg4+ 35.Ke4 Re8+ 36.Kd5 Bf3+ Accuracy: White = 38%, Black = 80%.
0-1

(71) Euwe,Max – Landau,Salo [D18]
NED-ch11 Netherlands (6), 11.10.1939
[Tactical Analysis 2.10 (10s)]

1.d4 ChessBase 1…d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.e3 e6 7.Bxc4 Bb4 8.0-0 Nbd7 9.Qb3 Qb6 10.e4 Bg6 D18: Slav Defence: 5 a4 Bf5 6 e3 11.Bxe6N [Predecessor: 11.e5 Nd5 12.Nxd5 exd5 13.Bd3 Be7 14.Qc2 Nf8 15.a5 Qb5 16.Bxg6 hxg6 17.Bg5 Ne6 18.Bxe7 Kxe7 ½-½ (54) Landau,S-Jackson,E Nottingham 1936 EXT 2017 [ChessBase]] 11…fxe6 12.a5 Bxa5 13.Qxe6+ Kd8 14.e5 Re8

15.Qh3! LiveBook: 3 Games 15…Bxc3! 16.exf6 [16.bxc3+/= Ne4 17.Ng5] 16…Bb4 [16…Bxd4 17.fxg7 Be4 18.Bg5+ Kc7 19.Bf4+ Kc8 20.Rad1+-; 16…Bxb2= keeps the balance. 17.Bxb2 Qxb2 18.fxg7 Qb5] 17.fxg7+/- Black must now prevent Bg5+. 17…Bd6?

[17…Qb5!+/=] 18.Ne5!+- Bxe5 19.dxe5 Threatens to win with Rd1. 19…Bf7? [19…Nc5 20.Be3 Qb5] 20.Rd1 Bd5 21.e6 Nf6 22.Bg5 Ke7 23.Qc3 1-0

(75) Euwe,Max – Keres,Paul [C74]
World Championship 18th The Hague/Moscow (11), 11.04.1948
[Tactical Analysis 2.10 (10s)]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.c3 f5 6.exf5 Bxf5 7.d4 e4 8.Ng5 d5 9.f3 e3 10.f4 C74: Ruy Lopez: Deferred Steinitz: 5 c3 f5 10…Bd6 11.Qf3 Qf6N [Predecessor: 11…Qd7 12.Qxe3+ Nge7 13.Nf3 0-0 14.Ne5 Nxe5 15.Bxd7 Nd3+ 16.Kd1 Bxd7 17.Qxd3 Bg4+ 1-0 (27) Horowitz,I-Fine,R Syracuse,NY 1934] 12.Qxe3+ White is slightly better. 12…Nge7 13.Bxc6+ [13.0-0 keeps more tension. 13…0-0-0 14.Nf3 h6 15.Ne5 Rdf8 16.Rf2] 13…bxc6 14.0-0 0-0! 15.Nd2 [15.Nf3=] 15…Ng6!-/+ And now …Rae8 would win. 16.g3 [16.Ngf3-/+ is a better defense. 16…Bxf4 17.Qf2] 16…Rae8-+ 17.Qf2 Bd3 [17…h6-+ 18.Ngf3 Bxf4!] 18.Re1-/+ Rxe1+ 19.Qxe1

19…Bxf4! 20.gxf4?? [20.Nh3-/+] 20…Nxf4-+ 21.Ndf3?

[21.Nde4 dxe4 22.Bxf4 Qxf4 23.Qg3] 21…Ne2+! Black is clearly winning. 22.Kg2 h6 23.Qd2 [>=23.h3] 23…Qf5 ( -> …Qg4+) 24.Qe3 hxg5 25.Bd2 Be4 Accuracy: White = 25%, Black = 83%.
0-1

(77) Botvinnik,Mikhail – Euwe,Max [D49]
World Championship 18th The Hague/Moscow (12), 13.04.1948
[Tactical Analysis 2.10 (10s)]

1.d4 d5 2.Nf3 Nf6 3.c4 e6 4.Nc3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 c5 10.e5 cxd4 11.Nxb5 axb5 12.exf6 Qb6 13.fxg7 Bxg7 14.0-0 Nc5 D49: Semi-Slav: Meran System: Main line with 9 e4 c5 10 e5 cxd4 11 Nxb5 15.Bf4 Bb7 16.Re1 LiveBook: 6 Games 16…Rd8N White is slightly better. [Predecessor: 16…Nxd3 17.Qxd3 Bxf3 18.Qxf3 0-0 19.Qg3 Kh8 20.Be5 f6 21.Bd6 Rfe8 22.Rac1 0-1 (30) Bogoljubow,E-Schmidt,P Salzburg 1943] 17.Rc1 Rd5 18.Be5 Bxe5 19.Rxe5 [ Much less strong is 19.Nxe5 Rg8+/=] 19…Rxe5 [Black should play 19…Nxd3 20.Qxd3 Qd8] 20.Nxe5+/- Nxd3 [20…h5+/- 21.b4 Nxd3 22.Qxd3 Rg8] 21.Qxd3+- f6?

[21…Rf8 22.Qxh7 Qd6] 22.Qg3! Qg7 is the strong threat. 22…fxe5 23.Qg7 Rf8 Threatens to win with …d3. 24.Rc7 Qxc7 25.Qxc7 Endgame KQ-KRB 25…Bd5 26.Qxe5 d3 27.Qe3 Bc4 28.b3 White is clearly winning. 28…Rf7 29.f3 Rd7

30.Qd2! [ Stronger than 30.bxc4 d2=] 30…e5 [>=30…Kd8 31.h4 Bd5 32.Qxd3 Rb7] 31.bxc4 bxc4 intending …c3. 32.Kf2 Kf7 33.Ke3 Ke6 34.Qb4 Rc7 35.Kd2 Rc6 36.a4 Accuracy: White = 96%, Black = 32%.
1-0

(79) Botvinnik,Mikhail – Euwe,Max [D49]
World-ch17 Tournament The Hague/Moscow (12), 13.04.1948
[Tactical Analysis 2.10 (10s)]

1.d4 d5 2.Nf3 Nf6 3.c4 e6 4.Nc3 c6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 c5 10.e5 cxd4 11.Nxb5 axb5 12.exf6 Qb6 13.fxg7 Bxg7 14.0-0 Nc5 D49: Semi-Slav: Meran System: Main line with 9 e4 c5 10 e5 cxd4 11 Nxb5 15.Bf4 Bb7 16.Re1 LiveBook: 6 Games 16…Rd8N White is slightly better. [Predecessor: 16…Nxd3 17.Qxd3 Bxf3 18.Qxf3 0-0 19.Qg3 Kh8 20.Be5 f6 21.Bd6 Rfe8 22.Rac1 0-1 (30) Bogoljubow,E-Schmidt,P Salzburg 1943] 17.Rc1 Rd5 18.Be5 Bxe5 19.Rxe5 [ Much less strong is 19.Nxe5 Rg8=] 19…Rxe5 [19…Nxd3+/- 20.Qxd3 Qd6 21.Rxd5 Qxd5] 20.Nxe5+- Nxd3 21.Qxd3 f6?

[21…h5 keeps fighting. 22.b4 Rg8] 22.Qg3! Strongly threatening Qg7. 22…fxe5 23.Qg7 Rf8 …d3 is the strong threat. 24.Rc7 Qxc7 25.Qxc7 Endgame KQ-KRB 25…Bd5 26.Qxe5 d3 27.Qe3 Bc4 28.b3 White is clearly winning. 28…Rf7 29.f3 Rd7

30.Qd2! [ Stronger than 30.bxc4 d2=] 30…e5 [>=30…Bd5 31.Qxd3 Rb7] 31.bxc4 bxc4 32.Kf2 Kf7 33.Ke3 Ke6 34.Qb4 Rc7 35.Kd2 Rc6 36.a4 Accuracy: White = 93%, Black = 30%.
1-0

(80) Geller,Efim P – Euwe,Max [E28]
Candidates Tournament Zuerich (2), 31.08.1953
[Tactical Analysis 2.10 (10s)]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.a3 Bxc3+ 6.bxc3 b6 7.Bd3 Bb7 8.f3 Nc6 9.Ne2 0-0 10.0-0 Na5 11.e4 Ne8 12.Ng3 LiveBook: 5 Games. E28: Nimzo-Indian: Sämisch: 5…0-0 6 e3 12…cxd4N [Predecessor: 12…Nd6 13.e5 Ndxc4 14.Qe2 d5 15.Nh5 cxd4 16.cxd4 Qh4 17.g4 Nb3 18.Bxh7+ Kh8 19.Bb1 Nxa1 20.Qd3 g6 21.Nf6 Ba6 22.Rf2 Rac8 23.Bg5 Qxg5 24.f4 Qh4 25.Rf3 Nxe5 0-1 (25) Selzer,E-Ivkov,B Birmingham 1951] 13.cxd4 Rc8 14.f4 [14.Rb1=] 14…Nxc4=/+ 15.f5 f6 16.Rf4 b5 17.Rh4 Qb6 18.e5 Nxe5 [Black should play 18…h6-/+ 19.Rb1 fxe5 20.Bxh6 gxh6] 19.fxe6 Nxd3 20.Qxd3

20…Qxe6 …Qe1+ is the strong threat. 21.Qxh7+ Kf7 22.Bh6! Rh8-> Black mounts an attack. 23.Qxh8 aiming for Qh7. 23…Rc2 24.Rc1?

[24.d5= Bxd5 25.Rd1 Rxg2+ 26.Kf1 gxh6 27.Qxh6] 24…Rxg2+ 25.Kf1 Qb3 26.Ke1 Qf3 Accuracy: White = 31%, Black = 61%.
0-1

(81) Euwe,Max – Najdorf,Miguel [E61]
Candidates Tournament Zuerich (9), 13.09.1953
[Tactical Analysis 2.10 (10s)]

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 0-0 5.Nc3 c5 6.d5 LiveBook: 262 Games 6…e5 E61: King’s Indian: Early deviations for White, including Smyslov System 7.Bg5N [Predecessor: 7.Nh3 d6 8.0-0 Nbd7 9.e4 h6 10.f4 exf4 11.gxf4 Re8 12.Qd3 a6 13.a4 Ng4 14.Ne2 Qh4 15.Ra3 Rb8 0-1 (32) Guimard,C-Najdorf,M Havana 1952] 7…h6 8.Bxf6 [8.Bd2+/= deserves consideration.] 8…Qxf6 White has an edge. 9.d6 Nc6 10.e3 b6 11.Bd5 Kh8 12.Ne4 Qd8!|^ Black has some pressure. 13.h4 f5 14.Ng5 Bb7 15.g4 e4 [ Of course not 15…Qf6?! 16.Nf7+! Rxf7 17.g5+/=] 16.Ne2 Bxb2 [16…Qe8=/+] 17.Nf4!-/+ Qf6

18.gxf5! Bxa1?? [18…gxf5-/+ keeps the pressure on. 19.Rb1 Be5; 18…Qxf5 19.Bxe4] 19.Nxg6++- Kg7 20.Nxe4 Bc3+! 21.Kf1! Qxf5 22.Nf4! Kh8 [ Avoid the trap 22…Be5? 23.Ng3+-] 23.Nxc3 Hoping for Be4. 23…Rae8 [23…Na5+/= feels stronger.] 24.Nce2+/- And now Ng3 would win. 24…Rg8 25.h5 [25.Qa1++/- Qe5 26.Qxe5+ Rxe5 27.Bxg8 Kxg8 28.Rg1+ Kf7 29.Ng3] 25…Rg5!+/= 26.Ng3 Rxg3! 27.fxg3 Rh2 is the strong threat. 27…Rxe3?

[27…Na5!= and Black stays safe.] 28.Kf2!+- Re8 29.Re1 Rxe1? [29…Re5 30.Rxe5 Nxe5 31.Bxb7 Kg7] 30.Qxe1 Kg7 Black wants to play …Ne5. 31.Qe8 White threatens Qg8+ and mate. 31…Qc2+ 32.Kg1 White mates. 32…Qd1+ 33.Kh2 Qc2+ 34.Ng2 Qf5 35.Qg8+ Kf6 36.Qh8+ Double Attack 36…Kg5 37.Qg7+ Accuracy: White = 62%, Black = 39%.
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(82) Euwe,Max – Najdorf,Miguel [E61]
Candidates Tournament Zuerich (9), 13.09.1953
[Tactical Analysis 2.10 (10s)]

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 0-0 5.Nc3 c5 6.d5 LiveBook: 262 Games 6…e5 E61: King’s Indian: Early deviations for White, including Smyslov System [6…d6=] 7.Bg5N [Predecessor: 7.Nh3 d6 8.0-0 Nbd7 9.e4 h6 10.f4 exf4 11.gxf4 Re8 12.Qd3 a6 13.a4 Ng4 14.Ne2 Qh4 15.Ra3 Rb8 0-1 (32) Guimard,C-Najdorf,M Havana 1952] 7…h6 8.Bxf6 Qxf6 White has an edge. 9.d6 Nc6 10.e3 b6 11.Bd5 Kh8 12.Ne4 Qd8! 13.h4 f5 14.Ng5 Bb7! 15.g4 e4 [ Don’t play 15…Qf6?! 16.Nf7+ Rxf7 17.g5=] 16.Ne2 Nf4 is the strong threat. 16…Bxb2 [16…Be5=/+ might be stronger.] 17.Nf4!-/+ Qf6

18.gxf5! Bxa1?? [18…gxf5-/+ keeps the pressure on. 19.Rb1 Be5; 18…Qxf5 19.Bxe4] 19.Nxg6++- Kg7 20.Nxe4 [20.Nf4!+/- Bc3+ 21.Kf1] 20…Bc3+!+/= 21.Kf1! Qxf5 22.Nf4! Kh8 Strongly threatening …Be5. [ But not 22…Be5? 23.Ng3+-] 23.Nxc3 Black must now prevent Be4. 23…Rae8 24.Nce2 Hoping for Ng3. 24…Rg8 25.h5 [25.Qa1++/- Qe5 26.Qxe5+ Rxe5 27.Bxg8 Kxg8 28.Rg1+ Kf7 29.Ng3] 25…Rg5 26.Ng3 Rxg3! 27.fxg3 aiming for Rh2. 27…Rxe3?

[27…Na5!= and Black is okay.] 28.Kf2!+- Re8

29.Re1! Rxe1? [29…Re5 30.Rxe5 Nxe5 31.Bxb7 Qf6] 30.Qxe1 Intending Qe8+ and mate. 30…Kg7 Threatening …Ne5. 31.Qe8 White threatens Qg8+ and mate. 31…Qc2+ 32.Kg1 White mates. 32…Qd1+ 33.Kh2 Qc2+ 34.Ng2 Qf5 35.Qg8+ Kf6 36.Qh8+ Double Attack 36…Kg5 37.Qg7+ Accuracy: White = 59%, Black = 37%.
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