58.1M
positions
9.6M
practically solved
209.78T
engine nodes
1.7M
analyses
5,307
in queue
13
active workers
88
active cores
27.4M
nodes / sec
30.7
positions / min
131
proof number
3,776
disproof number
Root conquest: 0/20 first moves solved · 16.5% of tree positions solved · last 24h: 560,061 closures, 6.38T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 80 over 167 open obligations, of which 28 (16.8%) 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 10.0m (median of 113) · measured at 2026-09-19 12:00 UTC
Closures by source, last 24h (559822 of 559822 labelled): USER 99.9% (559084) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (738) · last 7d (1980378 of 1980617): USER 98.6% (1951921) · FILL 0.2% (3608) · AUTO 1.1% (21080) · SOLVE 0.0% (0) · NONE 0.2% (3769). 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 … Bh4 11. c4 d5 12. c5 Kh8 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 e6 2. e3 g6 … 13. Be2 Kh7 14. O-O a5 15. d5 (User) · 128.0M nodes · auranvesdranor-j-002-atomicdb
- 1. Nh3 e6 2. e3 g6 … Bh4 11. c4 d5 12. c5 Rfe8 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Ba6 21. Rb1 Rd8 22. Na4 Na1 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Ba6 21. Rb1 Rd8 22. Na4 Na3 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
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 | 1068 | 2 | |
| g1h3 | unsolved | 803 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 435 | 2 | |
| e2e4 | unsolved | 417 | 2 | |
| b1c3 | unsolved | 72 | 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 | -223 | 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 | auranvesdranor 24.6% of the fleet | 1.57T | 11,936 |
| 2 | BManBJ 21.6% of the fleet | 1.38T | 10,046 |
| 3 | Torom 16.0% of the fleet | 1.02T | 7,308 |
| 4 | JackIV 14.4% of the fleet | 917.84B | 4,952 |
| 5 | randomchampgamer 9.0% of the fleet | 572.07B | 4,319 |
| 6 | tenzink 9.0% of the fleet | 571.19B | 3,666 |
| 7 | quasa 3.3% of the fleet | 210.39B | 1,481 |
| 8 | MoNiKaMaDnEsS 2.0% of the fleet | 129.47B | 754 |
| 9 | soothdest 0.1% of the fleet | 8.10B | 61 |
| 10 | NeoArcturus <0.1% of the fleet | 640.0M | 5 |
10 accounts · 6.38T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 37.9% of the fleet | 79.65T | 677,611 |
| 2 | tenzink 16.4% of the fleet | 34.41T | 292,120 |
| 3 | auranvesdranor 11.2% of the fleet | 23.51T | 169,027 |
| 4 | BManBJ 10.9% of the fleet | 22.80T | 154,929 |
| 5 | JackIV 4.2% of the fleet | 8.86T | 61,524 |
| 6 | randomchampgamer 3.7% of the fleet | 7.69T | 55,143 |
| 7 | RickEdinson 3.0% of the fleet | 6.32T | 41,667 |
| 8 | NeoArcturus 1.9% of the fleet | 4.09T | 16,756 |
| 9 | MoNiKaMaDnEsS 1.8% of the fleet | 3.84T | 24,377 |
| 10 | ijh 1.7% of the fleet | 3.57T | 37,348 |
and 22 more.
32 accounts · 209.94T 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 19 proposals · see every proposal
Milestones
- Sep 19 12:52 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … Ba6 21. Rb1 Rd8 22. Na4 Nd4
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Bf8 16. Bh6 Be7 17. exd6 Nc6 18. d5 Nb4 19. Kh1 Nc2 20. Nc3 Ba6 21. Rb1 Rd8 22. Na4 Nd4 - Sep 19 12:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Ke8 28. Rb8 Kd7 29. Qe4 f3
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Bf8 16. Bh6 Be7 17. exd6 Nc6 18. d5 Nb4 19. Kh1 Nc2 20. Nc3 Ba6 21. Rb1 Rd8 22. Na4 Nd4 23. Bg5 Rd7 24. Nxb6 Rc7 25. d6 Kf7 26. dxc7 f4 27. Qd3 Ke8 28. Rb8 Kd7 29. Qe4 f3 - Sep 19 12:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 27. Qd3 Ke8 28. Rb8 Kd7 29. Qe4
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Bf8 16. Bh6 Be7 17. exd6 Nc6 18. d5 Nb4 19. Kh1 Nc2 20. Nc3 Ba6 21. Rb1 Rd8 22. Na4 Nd4 23. Bg5 Rd7 24. Nxb6 Rc7 25. d6 Kf7 26. dxc7 f4 27. Qd3 Ke8 28. Rb8 Kd7 29. Qe4 - Sep 19 12:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … f4 27. Qd3 Ke8 28. Rb8 Kd7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Bf8 16. Bh6 Be7 17. exd6 Nc6 18. d5 Nb4 19. Kh1 Nc2 20. Nc3 Ba6 21. Rb1 Rd8 22. Na4 Nd4 23. Bg5 Rd7 24. Nxb6 Rc7 25. d6 Kf7 26. dxc7 f4 27. Qd3 Ke8 28. Rb8 Kd7 - Sep 19 12:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 26. dxc7 f4 27. Qd3 Ke8 28. Rb8
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Bf8 16. Bh6 Be7 17. exd6 Nc6 18. d5 Nb4 19. Kh1 Nc2 20. Nc3 Ba6 21. Rb1 Rd8 22. Na4 Nd4 23. Bg5 Rd7 24. Nxb6 Rc7 25. d6 Kf7 26. dxc7 f4 27. Qd3 Ke8 28. Rb8 - Sep 19 12:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kf7 26. dxc7 f4 27. Qd3 Ke8
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Bf8 16. Bh6 Be7 17. exd6 Nc6 18. d5 Nb4 19. Kh1 Nc2 20. Nc3 Ba6 21. Rb1 Rd8 22. Na4 Nd4 23. Bg5 Rd7 24. Nxb6 Rc7 25. d6 Kf7 26. dxc7 f4 27. Qd3 Ke8 - Sep 19 12:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 25. d6 Kf7 26. dxc7 f4 27. Qd3
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Bf8 16. Bh6 Be7 17. exd6 Nc6 18. d5 Nb4 19. Kh1 Nc2 20. Nc3 Ba6 21. Rb1 Rd8 22. Na4 Nd4 23. Bg5 Rd7 24. Nxb6 Rc7 25. d6 Kf7 26. dxc7 f4 27. Qd3 - Sep 19 12:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rc7 25. d6 Kf7 26. dxc7 f4
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Bf8 16. Bh6 Be7 17. exd6 Nc6 18. d5 Nb4 19. Kh1 Nc2 20. Nc3 Ba6 21. Rb1 Rd8 22. Na4 Nd4 23. Bg5 Rd7 24. Nxb6 Rc7 25. d6 Kf7 26. dxc7 f4 - Sep 19 12:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 24. Nxb6 Rc7 25. d6 Kf7 26. dxc7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Bf8 16. Bh6 Be7 17. exd6 Nc6 18. d5 Nb4 19. Kh1 Nc2 20. Nc3 Ba6 21. Rb1 Rd8 22. Na4 Nd4 23. Bg5 Rd7 24. Nxb6 Rc7 25. d6 Kf7 26. dxc7 - Sep 19 12:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rd7 24. Nxb6 Rc7 25. d6 Kf7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Bf8 16. Bh6 Be7 17. exd6 Nc6 18. d5 Nb4 19. Kh1 Nc2 20. Nc3 Ba6 21. Rb1 Rd8 22. Na4 Nd4 23. Bg5 Rd7 24. Nxb6 Rc7 25. d6 Kf7 - Sep 19 12:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 23. Bg5 Rd7 24. Nxb6 Rc7 25. d6
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Bf8 16. Bh6 Be7 17. exd6 Nc6 18. d5 Nb4 19. Kh1 Nc2 20. Nc3 Ba6 21. Rb1 Rd8 22. Na4 Nd4 23. Bg5 Rd7 24. Nxb6 Rc7 25. d6 - Sep 19 12:52 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Nd4 23. Bg5 Rd7 24. Nxb6 Rc7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 g6 8. Bg5 e6 9. c4 Na6 10. b4 Nb8 11. h3 a5 12. b5 b6 13. O-O Bh6 14. Nxh8 cxb5 15. e5 Bf8 16. Bh6 Be7 17. exd6 Nc6 18. d5 Nb4 19. Kh1 Nc2 20. Nc3 Ba6 21. Rb1 Rd8 22. Na4 Nd4 23. Bg5 Rd7 24. Nxb6 Rc7