65.5M
positions
11.7M
practically solved
234.98T
engine nodes
1.8M
analyses
7,345
in queue
12
active workers
80
active cores
37.7M
nodes / sec
20.6
positions / min
125
proof number
3,777
disproof number
Root conquest: 0/20 first moves solved · 17.8% of tree positions solved · last 24h: 192,965 closures, 3.70T 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 (192965 of 192965 labelled): USER 99.9% (192798) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (167) · last 7d (1423969 of 1423969): USER 97.0% (1381283) · FILL 0.6% (8795) · AUTO 2.3% (32065) · SOLVE 0.0% (0) · NONE 0.1% (1826). 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 … exd5 14. Bxd7 h5 15. h3 Rb8 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 e6 2. e3 g6 … exd5 14. Bxd7 h5 15. h3 Ba5 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … e6 13. e5 Ne4 14. f3 Rd8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … e6 13. e5 Ne4 14. f3 Ra8 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 d6 2. Ng5 f5 … e6 13. e5 Ne4 14. f3 Rc8 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
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 | 801 | 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 | 1.39T | 10,556 |
| 2 | auranvesdranor 24.9% of the fleet | 922.31B | 6,930 |
| 3 | randomchampgamer 14.9% of the fleet | 550.18B | 4,341 |
| 4 | tenzink 14.1% of the fleet | 523.02B | 3,341 |
| 5 | uipio 6.0% of the fleet | 221.72B | 1,211 |
| 6 | bricerichmond 2.1% of the fleet | 77.73B | 109 |
| 7 | soothdest 0.3% of the fleet | 9.77B | 76 |
| 8 | rhaxier <0.1% of the fleet | 1.66B | 13 |
| 9 | NeoArcturus <0.1% of the fleet | 142.6M | 2 |
9 accounts · 3.70T 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 | 36.66T | 306,947 |
| 3 | BManBJ 11.7% of the fleet | 27.45T | 189,310 |
| 4 | auranvesdranor 11.4% of the fleet | 26.81T | 192,956 |
| 5 | JackIV 4.3% of the fleet | 10.06T | 67,859 |
| 6 | randomchampgamer 4.0% of the fleet | 9.46T | 68,903 |
| 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 · 235.06T 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 10:29 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … e6 13. e5 Ne4 14. f3 Kg7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 Be6 10. c4 O-O 11. Nxb7 Bd7 12. Qb3 e6 13. e5 Ne4 14. f3 Kg7 - Sep 28 10:29 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Be7 26. Qe8 Bf8 27. Bf6 Kh7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 Be6 10. c4 O-O 11. Nxb7 Bd7 12. Qb3 e6 13. e5 Ne4 14. f3 Kg7 15. c5 Kh8 16. exd6 Nf2 17. Qb7 Rf7 18. c6 Nd3 19. Kd2 Ne5 20. dxe5 Rc7 21. Qxc7 Bf8 22. c7 Bb4 23. Ke2 Ba5 24. c8=Q Bd8 25. Qd7 Be7 26. Qe8 Bf8 27. Bf6 Kh7 - Sep 28 10:29 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 25. Qd7 Be7 26. Qe8 Bf8 27. Bf6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 Be6 10. c4 O-O 11. Nxb7 Bd7 12. Qb3 e6 13. e5 Ne4 14. f3 Kg7 15. c5 Kh8 16. exd6 Nf2 17. Qb7 Rf7 18. c6 Nd3 19. Kd2 Ne5 20. dxe5 Rc7 21. Qxc7 Bf8 22. c7 Bb4 23. Ke2 Ba5 24. c8=Q Bd8 25. Qd7 Be7 26. Qe8 Bf8 27. Bf6 - Sep 28 10:29 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bd8 25. Qd7 Be7 26. Qe8 Bf8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 Be6 10. c4 O-O 11. Nxb7 Bd7 12. Qb3 e6 13. e5 Ne4 14. f3 Kg7 15. c5 Kh8 16. exd6 Nf2 17. Qb7 Rf7 18. c6 Nd3 19. Kd2 Ne5 20. dxe5 Rc7 21. Qxc7 Bf8 22. c7 Bb4 23. Ke2 Ba5 24. c8=Q Bd8 25. Qd7 Be7 26. Qe8 Bf8 - Sep 28 10:29 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 24. c8=Q Bd8 25. Qd7 Be7 26. Qe8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 Be6 10. c4 O-O 11. Nxb7 Bd7 12. Qb3 e6 13. e5 Ne4 14. f3 Kg7 15. c5 Kh8 16. exd6 Nf2 17. Qb7 Rf7 18. c6 Nd3 19. Kd2 Ne5 20. dxe5 Rc7 21. Qxc7 Bf8 22. c7 Bb4 23. Ke2 Ba5 24. c8=Q Bd8 25. Qd7 Be7 26. Qe8 - Sep 28 10:29 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Ba5 24. c8=Q Bd8 25. Qd7 Be7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 Be6 10. c4 O-O 11. Nxb7 Bd7 12. Qb3 e6 13. e5 Ne4 14. f3 Kg7 15. c5 Kh8 16. exd6 Nf2 17. Qb7 Rf7 18. c6 Nd3 19. Kd2 Ne5 20. dxe5 Rc7 21. Qxc7 Bf8 22. c7 Bb4 23. Ke2 Ba5 24. c8=Q Bd8 25. Qd7 Be7 - Sep 28 10:29 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 23. Ke2 Ba5 24. c8=Q Bd8 25. Qd7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 Be6 10. c4 O-O 11. Nxb7 Bd7 12. Qb3 e6 13. e5 Ne4 14. f3 Kg7 15. c5 Kh8 16. exd6 Nf2 17. Qb7 Rf7 18. c6 Nd3 19. Kd2 Ne5 20. dxe5 Rc7 21. Qxc7 Bf8 22. c7 Bb4 23. Ke2 Ba5 24. c8=Q Bd8 25. Qd7 - Sep 28 10:29 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bb4 23. Ke2 Ba5 24. c8=Q Bd8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 Be6 10. c4 O-O 11. Nxb7 Bd7 12. Qb3 e6 13. e5 Ne4 14. f3 Kg7 15. c5 Kh8 16. exd6 Nf2 17. Qb7 Rf7 18. c6 Nd3 19. Kd2 Ne5 20. dxe5 Rc7 21. Qxc7 Bf8 22. c7 Bb4 23. Ke2 Ba5 24. c8=Q Bd8 - Sep 28 10:29 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 22. c7 Bb4 23. Ke2 Ba5 24. c8=Q
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 Be6 10. c4 O-O 11. Nxb7 Bd7 12. Qb3 e6 13. e5 Ne4 14. f3 Kg7 15. c5 Kh8 16. exd6 Nf2 17. Qb7 Rf7 18. c6 Nd3 19. Kd2 Ne5 20. dxe5 Rc7 21. Qxc7 Bf8 22. c7 Bb4 23. Ke2 Ba5 24. c8=Q - Sep 28 10:29 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bf8 22. c7 Bb4 23. Ke2 Ba5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 Be6 10. c4 O-O 11. Nxb7 Bd7 12. Qb3 e6 13. e5 Ne4 14. f3 Kg7 15. c5 Kh8 16. exd6 Nf2 17. Qb7 Rf7 18. c6 Nd3 19. Kd2 Ne5 20. dxe5 Rc7 21. Qxc7 Bf8 22. c7 Bb4 23. Ke2 Ba5 - Sep 28 10:29 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 21. Qxc7 Bf8 22. c7 Bb4 23. Ke2
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 Be6 10. c4 O-O 11. Nxb7 Bd7 12. Qb3 e6 13. e5 Ne4 14. f3 Kg7 15. c5 Kh8 16. exd6 Nf2 17. Qb7 Rf7 18. c6 Nd3 19. Kd2 Ne5 20. dxe5 Rc7 21. Qxc7 Bf8 22. c7 Bb4 23. Ke2 - Sep 28 10:29 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rc7 21. Qxc7 Bf8 22. c7 Bb4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 g6 6. d4 h5 7. Bxc6 Bh6 8. Bg5 Nf6 9. Nd8 Be6 10. c4 O-O 11. Nxb7 Bd7 12. Qb3 e6 13. e5 Ne4 14. f3 Kg7 15. c5 Kh8 16. exd6 Nf2 17. Qb7 Rf7 18. c6 Nd3 19. Kd2 Ne5 20. dxe5 Rc7 21. Qxc7 Bf8 22. c7 Bb4