Nb3 Rc8 18. Na5 Ba8 19. d5 or 16...Rb8 (planning to immediately play Ba8 in anticipation of Nb3-Na5), where play continues 17. Nb3 Ba8 18. Na5 c5 19. d5...
85 KB (11,257 words) - 02:40, 7 November 2024
Rc1 Rc8 13.Ba3 Qa5 14.Qb3 Rfe8 15.Rc5 Qb6 16.Rb5 Qd8 17.Ng5 Bxe2 18.Nxf7 Na5 and White mates in three (19.Nh6+ double check Kh8 20.Qg8+ Rxg8 21.Nf7#)...
17 KB (1,917 words) - 13:00, 5 July 2024
where White has chosen the offensive line 4.Ng5, but 5...Nxd5 is risky (5...Na5, the Polerio Defense, is considered better; other Black choices include 5...
6 KB (572 words) - 06:54, 29 October 2024
of the Two Knights Defense (1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5) in which Black sacrifices a pawn for active play is known as the "Knorre...
10 KB (1,332 words) - 17:01, 26 April 2024
dxc4 5. e3 c5 6. Bxc4 a6 7. 0-0 Nc6 8. Nc3 b5 9. Bd3 Bb7 10. a4 b4 11. Ne4 Na5 (diagram) 12. Nxf6+ gxf6 13. e4 c4 14. Bc2 Qc7 15. Bd2 Rg8 16. Rc1 0-0-0...
100 KB (11,319 words) - 08:36, 18 October 2024
Nxd5 10.Qb3 Nce7 (10...Na5 is an alternative, inviting a repetition of moves after 11.Qa4+ Nc6 [threatening 12...Nb6] 12.Qb3 Na5) 11.0-0 0-0 12.Rfe1 c6...
16 KB (1,948 words) - 23:29, 17 September 2024
e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 d6 8.c3 0-0 9.d3 Na5 10.Bc2 c5 11.Nbd2 Re8 12.h3 Bf8 13.Nf1 Bb7 14.Ng3 g6 15.Bg5 h6 16.Bd2 d5...
56 KB (7,013 words) - 14:30, 1 May 2024
0-0 0-0 8.e5 Nd7 9.Re1 b5 10.Nf1 b4 11.h4 a5 12.Bf4 a4 13.a3 bxa3 14.bxa3 Na5 15.Ne3 Ba6 16.Bh3 d4 17.Nf1 Nb6 18.Ng5 Nd5 19.Bd2 Bxg5 20.Bxg5 Qd7 21.Qh5...
12 KB (1,880 words) - 17:20, 20 April 2024
since both the bishop and e4-pawn are attacked. Then Black usually plays 5...Na5 but there are other options: The recapture 5...Nxd5?! is extremely risky...
23 KB (2,328 words) - 21:54, 2 July 2024
b4 Bb6 5. b5 Na5 6. Nxe5 Nh6 Italian Game: Evans Gambit Declined, Pavlov Variation: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bb6 5. b5 Na5 6. Nxe5 Nh6 7...
367 KB (76,249 words) - 23:04, 14 October 2024
has multiple solid choices, including 7...0-0 and 7...Nb6 (followed by ...Na5), which is considered to equalise. Another possibility for Black is 5...c6...
20 KB (3,005 words) - 16:52, 20 December 2023
e6 2.d4 d5 3.Be3 Nf6 4.e5 Nfd7 5.f4 c5 6.c3 Nc6 7.Nf3 Qb6 8.Qd2 c4 9.Be2 Na5 10.0-0 f5 11.Ng5 Be7 12.g4 Bxg5 13.fxg5 Nf8 14.gxf5 exf5 15.Bf3 Be6 16.Qg2...
41 KB (4,390 words) - 21:01, 1 November 2024
knight. Black usually subsequently retreats the bishop to b6 to facilitate ...Na5, which is particularly strong when White opts for the Bc4, Qb3 approach....
10 KB (1,345 words) - 18:38, 11 October 2024
Nb4 12.Bxb4 Bxb4 13.a3 Be7 14.Nbd2 Rc8 15.b4 a5 16.Ne5 Nd5 17.Nb3 axb4 18.Na5 Ba8 19.Nac6 Bxc6 20.Nxc6 Qd7 21.Bxd5 exd5 22.axb4 Rfe8 23.Ra5 Bf8 24.Ne5...
8 KB (1,149 words) - 16:50, 19 November 2023
After 6...d5, 7.Nc3 Bd7!, threatening 8...Na5, leading to complications and good play for Black (e.g. 8.Bg5 Na5 or 8.Qxb7 Rb8 9.Qxc7 Qc5). After the stronger...
18 KB (2,450 words) - 21:02, 27 June 2024
Wilkes–Barre Variation or Traxler Counterattack]; 4...Nxe4?!; 4...d5 5.exd5 Na5 6.Bb5+ c6 [the main line]; 4...d5 5.exd5 Nd4 [the Fritz Variation]; and 4...
261 KB (24,743 words) - 14:48, 3 November 2024
Re1 b5 7.Bb3 d6 8.c3 0-0 9.h3 h6 10.d4 Re8 11.Nbd2 Bf8 12.Nf1 Bd7 13.Ng3 Na5 14.Bc2 c5 15.b3 Nc6 16.d5 Ne7 17.Be3 Ng6 18.Qd2 Nh7 19.a4 Nh4 20.Nxh4 Qxh4...
37 KB (4,519 words) - 21:19, 28 October 2024
Nc3 dxc4 10. bxc4 Nb6 11. c5 Nc4 12. Bc1 Nd5 13. Qb3 (diagram) Na5 14. Qa3 Nc4 15. Qb3 Na5 16. Qa3 Nc4 ½–½ Anand–Carlsen, game 2 Anand opened with 1.e4...
63 KB (5,221 words) - 23:56, 21 October 2024
(11-KT) 11β-Hydroxyandrostenedione (11β-OHA4) 19-Nor-5-androstenediol (19-NA5)* Adrenosterone (11-ketoandrostenedione; 11-KA4) Androstenedione (A4; 4-androstenedione)...
9 KB (376 words) - 17:45, 11 November 2023
the King's Gambit Declined after 4.d3 d6 5.f4 Nc6 6.Nf3; 3...Nc6 4.d3, 4...Na5, 4...Bc5 or 4...d6 are all playable; 3...Bb4 4.f4 Nxe4 5.Qh5 0-0 leads to...
16 KB (2,093 words) - 07:44, 3 November 2024
and nonresonant interactions with transverse waves. J. Geophys. Res. 84 (NA5), 2139–2140 (1979) N. Metzler, S. Cuperman, M. Dryer and P. Rosenau, A time-dependent...
55 KB (6,597 words) - 19:10, 21 October 2024
Nb3 Nb6 4.Nc3 Nc6 5.Ne4 Ne5 6.Ng5 Ng4 7.Nf3 Nf6 8.Ng1 Ng8 9.Nc5 Nc4 10.Na4 Na5 11.Nc3 Nc6 12.Nb1 Nb8 13.Nf3 ½–½. Both players received 0 points for the...
16 KB (1,693 words) - 13:10, 29 October 2024
attacking move.) 10. Nh5! Bh8 (10...gxh5 11.Qxh5 h6 12.Nxf7 is disastrous; 10...Na5 11.Nxg7 Nxc4! 12.dxc4 Kxg7 is forced.) 11. Qf3 Qe8 12. Nf6+ Bxf6 13. Qxf6...
21 KB (3,241 words) - 07:04, 2 October 2024
Nc3 Nc6 3.Nf3 g6 4.d4 exd4 5.Nxd4 Bg7 6.Be3 Nge7 7.Bc4 d6 8.0-0 0-0 9.f4 Na5 10.Bd3 d5 11.exd5 Nxd5 12.Nxd5 Qxd5 13.c3 Rd8 14.Qc2 Nc4 15.Bxc4 Qxc4 16...
3 KB (390 words) - 23:21, 23 September 2023
which are difficult to defend under practical conditions. Most common is 5...Na5, sacrificing a pawn for an active position. The very sharp Fritz Variation...
8 KB (1,003 words) - 00:38, 12 October 2024
c3 Ba5 10.Ba3 Re8 11.Qb3 Bxf3 12.Rxf3 Bb6+ 13.d4 Rxe5 14.Nd2 Nc6 15.Kh1 Na5 16.Qc2 Nxc4 17.Nxc4 Rh5 18.Ne5 Nxc3 19.Nxf7 Qxd4 20.Rg1 c5 21.Rxc3 Bc7 22...
24 KB (2,656 words) - 03:14, 11 October 2024
e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Be7 6.Re1 b5 7.Bb3 d6 8.c3 0-0 9.h3 Na5 10.Bc2 c5 11.d4 Qc7) and the Chigorin Defence to the Queen's Gambit (1.d4...
12 KB (1,636 words) - 20:08, 24 October 2024
36334 2000 NZ4 — July 7, 2000 Socorro LINEAR · 3.7 km MPC · JPL 36335 2000 NA5 — July 7, 2000 Socorro LINEAR NYS 2.6 km MPC · JPL 36336 2000 ND5 — July...
171 KB (301 words) - 18:21, 7 April 2024
Rc1 Rc8 13.Ba3 Qa5 14.Qb3 Rfe8 15.Rc5 Qb6 16.Rb5 Qd8 17.Ng5 Bxe2 18.Nxf7 Na5 and White mates in three (19.Nh6+ double check Kh8 20.Qg8+ Rxg8 21.Nf7#)...
21 KB (2,569 words) - 06:16, 19 July 2024
Bxf6 gxf6 5. dxc5 Nc6 6. Bb5 e6 7. c4 dxc4 8. Nd2 Bxc5 9. Ngf3 0-0 10. 0-0 Na5 11. Rc1 Be7 12. Qc2 Bd7 13. Bxd7 Qxd7 14. Qc3 Qd5 15. Nxc4 Nxc4 16. Qxc4...
77 KB (7,710 words) - 02:14, 6 August 2024