65.5M
positions
11.7M
practically solved
234.98T
engine nodes
1.8M
analyses
7,303
in queue
12
active workers
80
active cores
23.4M
nodes / sec
19.0
positions / min
125
proof number
3,777
disproof number
Root conquest: 0/20 first moves solved · 17.8% of tree positions solved · last 24h: 194,466 closures, 3.72T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 82 over 196 open obligations, of which 30 (15.3%) sit at or below dn 2, one unanswered question from falling over · 0 open nodes on impossible numbers · positions a visitor asked for close in 2.4m (median of 113) · measured at 2026-09-28 10:00 UTC
Closures by source, last 24h (194465 of 194465 labelled): USER 99.9% (194280) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (185) · last 7d (1427784 of 1427785): USER 97.0% (1385079) · FILL 0.6% (8795) · AUTO 2.2% (32065) · SOLVE 0.0% (0) · NONE 0.1% (1845). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 e6 2. e3 g6 … f5 10. Ng5 hxg5 11. Bg5 Rh3 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 e6 2. e3 g6 … f5 10. Ng5 hxg5 11. Bg5 Bg7 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Nf6 11. O-O Kf7 12. e5 Be6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Nf6 11. O-O Kf7 12. e5 Bd7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … Nf6 11. O-O Kf7 12. e5 Bb7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
Play to explore drag a piece or click two squares
Keyboard move list
First moves from the starting position
| move | state | eval | visits | |
|---|---|---|---|---|
| g1f3 | unsolved | 1067 | 2 | |
| g1h3 | unsolved | 820 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 435 | 2 | |
| e2e4 | unsolved | 417 | 2 | |
| b1c3 | unsolved | 183 | 2 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | 0 | 3 | |
| b1a3 | unsolved | 0 | 3 | |
| h2h3 | unsolved | -100 | 2 | |
| a2a3 | unsolved | -103 | 2 | |
| f2f3 | unsolved | -110 | 2 | |
| d2d3 | unsolved | -116 | 2 | |
| b2b3 | unsolved | -119 | 1 | |
| f2f4 | unsolved | -301 | 3 | |
| h2h4 | unsolved | -500 | 2 | |
| a2a4 | unsolved | -502 | 2 | |
| g2g4 | unsolved | -600 | 2 | |
| c2c4 | unsolved | -700 | 3 |
Contributors by engine nodes
Every position in this tree was searched by somebody's machine. Ties share a place, and the share is measured against everything the whole fleet searched in that window.
Last 24 hours
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | BManBJ 37.7% of the fleet | 1.40T | 10,609 |
| 2 | auranvesdranor 24.8% of the fleet | 922.56B | 6,952 |
| 3 | randomchampgamer 14.8% of the fleet | 549.20B | 4,332 |
| 4 | tenzink 14.1% of the fleet | 525.49B | 3,338 |
| 5 | uipio 6.5% of the fleet | 240.15B | 1,247 |
| 6 | bricerichmond 2.1% of the fleet | 77.60B | 108 |
| 7 | soothdest 0.1% of the fleet | 3.62B | 31 |
| 8 | rhaxier <0.1% of the fleet | 1.66B | 13 |
| 9 | NeoArcturus <0.1% of the fleet | 142.6M | 2 |
9 accounts · 3.72T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 38.4% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.6% of the fleet | 36.67T | 306,998 |
| 3 | BManBJ 11.7% of the fleet | 27.48T | 189,513 |
| 4 | auranvesdranor 11.4% of the fleet | 26.83T | 193,103 |
| 5 | JackIV 4.3% of the fleet | 10.06T | 67,859 |
| 6 | randomchampgamer 4.0% of the fleet | 9.47T | 68,977 |
| 7 | RickEdinson 2.8% of the fleet | 6.50T | 43,070 |
| 8 | MoNiKaMaDnEsS 1.8% of the fleet | 4.14T | 26,565 |
| 9 | NeoArcturus 1.7% of the fleet | 4.09T | 16,758 |
| 10 | ijh 1.5% of the fleet | 3.57T | 37,348 |
and 24 more.
34 accounts · 235.14T nodes searched by the whole fleet.
Proposed campaigns
Anyone can put a line up and vote for it. The site owner decides which one the solver actually runs.
- Should be easiest proof for nf3 e51. Nf3 e5 2. e4proposed by quasa · 16 votes
- Pls nh4 is more solvable than c31. Nf3 f6 2. e4 e6 3. Nc3 c6 4. Nb5 cxb5 5. Bb5 Nc6 6. d4 g6 7. Nh4proposed by 67king · 6 votes
- Refuting 1... d61. Nf3 d6 2. Nc3proposed by randomchampgamer · 3 votes
- The weaker of the two f-pawn advances for 1. ...d61. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4proposed by MoNiKaMaDnEsS · 3 votes
- Let's solve Qc8 in 2N Nh6 mainline and/or use it as a benchmark1. Nf3 f6 2. e4 e6 3. d4 c6 4. Nc3 Nh6 5. g4 Bb4 6. e5 fxe5 7. Ng5 d5 8. h4 e5 9. Qe2 Nxg4 10. f3 Bg4 11. Bh3 Qc8 12. Bh6proposed by soothdest · 3 votes
- Is Nh3 h6 e3 e6 Nc3 a draw?1. Nh3 e6 2. e3 h6 3. Nc3proposed by soothdest · 3 votes
Showing the 6 most voted of 21 proposals · see every proposal
Milestones
- Sep 28 10:55 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … Nf6 11. O-O Kf7 12. e5 Bg7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 b5 8. Nxh8 f4 9. h3 Nd7 10. g3 Nf6 11. O-O Kf7 12. e5 Bg7 - Sep 28 10:55 Solved: WHITE_WIN via MINIMAXview
1. Nh3 e6 2. e3 g6 … f5 10. Ng5 hxg5 11. Bg5 Rxh2
1. Nh3 e6 2. e3 g6 3. Bb5 h6 4. Nc3 c6 5. Nd5 Qh4 6. g3 exd5 7. f3 d5 8. d4 Qe7 9. e4 f5 10. Ng5 hxg5 11. Bg5 Rxh2 - Sep 28 10:54 Solved: WHITE_WIN via MINIMAXview
1. Nh3 f6 2. e4 d6 … c5 7. h3 Qb4 8. Nd5 Nc6
1. Nh3 f6 2. e4 d6 3. Nc3 c6 4. Ng5 Qa5 5. Nxh7 Bf5 6. exf5 c5 7. h3 Qb4 8. Nd5 Nc6 - Sep 28 10:54 Solved: WHITE_WIN via MINIMAXview
1. Nh3 e6 2. e3 g6 … f5 10. Ng5 hxg5 11. Bg5 Bh6
1. Nh3 e6 2. e3 g6 3. Bb5 h6 4. Nc3 c6 5. Nd5 Qh4 6. g3 exd5 7. f3 d5 8. d4 Qe7 9. e4 f5 10. Ng5 hxg5 11. Bg5 Bh6 - Sep 28 10:54 Solved: WHITE_WIN via MINIMAXview
1. Nh3 e6 2. e3 g6 … f5 10. Ng5 hxg5 11. Bg5 Be6
1. Nh3 e6 2. e3 g6 3. Bb5 h6 4. Nc3 c6 5. Nd5 Qh4 6. g3 exd5 7. f3 d5 8. d4 Qe7 9. e4 f5 10. Ng5 hxg5 11. Bg5 Be6 - Sep 28 10:54 Solved: WHITE_WIN via MINIMAXview
1. Nh3 e6 2. e3 g6 … f5 10. Ng5 hxg5 11. Bg5 Bd7
1. Nh3 e6 2. e3 g6 3. Bb5 h6 4. Nc3 c6 5. Nd5 Qh4 6. g3 exd5 7. f3 d5 8. d4 Qe7 9. e4 f5 10. Ng5 hxg5 11. Bg5 Bd7 - Sep 28 10:54 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f5 2. e3 e6 … Kg4 27. Rh6 b6 28. Rh4 Kf5
1. Nh3 f5 2. e3 e6 3. Ng5 Nc6 4. b4 Nd4 5. exd4 h6 6. d4 hxg5 7. Bg5 Nf6 8. d5 Bc5 9. bxc5 e5 10. Nc3 Kf8 11. f3 d6 12. Qd2 f4 13. Nb5 Qe8 14. Nxa7 e4 15. Bb5 c6 16. O-O-O cxb5 17. a4 exf3 18. Qe2 Qe5 19. Bxf6 Bf5 20. c4 Bg4 21. Rd4 Bxe2 22. Re1 g5 23. Re8 Kf7 24. Rde4 Kg6 25. R4e6 Kh5 26. Rxh8 Kg4 27. Rh6 b6 28. Rh4 Kf5 - Sep 28 10:54 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f5 2. e3 e6 … 26. Rxh8 Kg4 27. Rh6 b6 28. Rh4
1. Nh3 f5 2. e3 e6 3. Ng5 Nc6 4. b4 Nd4 5. exd4 h6 6. d4 hxg5 7. Bg5 Nf6 8. d5 Bc5 9. bxc5 e5 10. Nc3 Kf8 11. f3 d6 12. Qd2 f4 13. Nb5 Qe8 14. Nxa7 e4 15. Bb5 c6 16. O-O-O cxb5 17. a4 exf3 18. Qe2 Qe5 19. Bxf6 Bf5 20. c4 Bg4 21. Rd4 Bxe2 22. Re1 g5 23. Re8 Kf7 24. Rde4 Kg6 25. R4e6 Kh5 26. Rxh8 Kg4 27. Rh6 b6 28. Rh4 - Sep 28 10:54 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f5 2. e3 e6 … Kh5 26. Rxh8 Kg4 27. Rh6 b6
1. Nh3 f5 2. e3 e6 3. Ng5 Nc6 4. b4 Nd4 5. exd4 h6 6. d4 hxg5 7. Bg5 Nf6 8. d5 Bc5 9. bxc5 e5 10. Nc3 Kf8 11. f3 d6 12. Qd2 f4 13. Nb5 Qe8 14. Nxa7 e4 15. Bb5 c6 16. O-O-O cxb5 17. a4 exf3 18. Qe2 Qe5 19. Bxf6 Bf5 20. c4 Bg4 21. Rd4 Bxe2 22. Re1 g5 23. Re8 Kf7 24. Rde4 Kg6 25. R4e6 Kh5 26. Rxh8 Kg4 27. Rh6 b6 - Sep 28 10:54 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f5 2. e3 e6 … 25. R4e6 Kh5 26. Rxh8 Kg4 27. Rh6
1. Nh3 f5 2. e3 e6 3. Ng5 Nc6 4. b4 Nd4 5. exd4 h6 6. d4 hxg5 7. Bg5 Nf6 8. d5 Bc5 9. bxc5 e5 10. Nc3 Kf8 11. f3 d6 12. Qd2 f4 13. Nb5 Qe8 14. Nxa7 e4 15. Bb5 c6 16. O-O-O cxb5 17. a4 exf3 18. Qe2 Qe5 19. Bxf6 Bf5 20. c4 Bg4 21. Rd4 Bxe2 22. Re1 g5 23. Re8 Kf7 24. Rde4 Kg6 25. R4e6 Kh5 26. Rxh8 Kg4 27. Rh6 - Sep 28 10:54 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f5 2. e3 e6 … Kg6 25. R4e6 Kh5 26. Rxh8 Kg4
1. Nh3 f5 2. e3 e6 3. Ng5 Nc6 4. b4 Nd4 5. exd4 h6 6. d4 hxg5 7. Bg5 Nf6 8. d5 Bc5 9. bxc5 e5 10. Nc3 Kf8 11. f3 d6 12. Qd2 f4 13. Nb5 Qe8 14. Nxa7 e4 15. Bb5 c6 16. O-O-O cxb5 17. a4 exf3 18. Qe2 Qe5 19. Bxf6 Bf5 20. c4 Bg4 21. Rd4 Bxe2 22. Re1 g5 23. Re8 Kf7 24. Rde4 Kg6 25. R4e6 Kh5 26. Rxh8 Kg4 - Sep 28 10:54 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f5 2. e3 e6 … 24. Rde4 Kg6 25. R4e6 Kh5 26. Rxh8
1. Nh3 f5 2. e3 e6 3. Ng5 Nc6 4. b4 Nd4 5. exd4 h6 6. d4 hxg5 7. Bg5 Nf6 8. d5 Bc5 9. bxc5 e5 10. Nc3 Kf8 11. f3 d6 12. Qd2 f4 13. Nb5 Qe8 14. Nxa7 e4 15. Bb5 c6 16. O-O-O cxb5 17. a4 exf3 18. Qe2 Qe5 19. Bxf6 Bf5 20. c4 Bg4 21. Rd4 Bxe2 22. Re1 g5 23. Re8 Kf7 24. Rde4 Kg6 25. R4e6 Kh5 26. Rxh8