56.8M
positions
9.1M
practically solved
205.52T
engine nodes
1.6M
analyses
4,181
in queue
15
active workers
100
active cores
13.4M
nodes / sec
38.6
positions / min
131
proof number
3,717
disproof number
Root conquest: 0/20 first moves solved · 16.0% of tree positions solved · last 24h: 385,465 closures, 5.35T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 166 open obligations, of which 31 (18.7%) 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 31.8m (median of 78) · measured at 2026-09-18 22:00 UTC
Closures by source, last 24h (385328 of 385328 labelled): USER 99.8% (384658) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (670) · last 7d (1651243 of 1651380): USER 98.3% (1622441) · FILL 0.2% (3855) · AUTO 1.3% (21080) · SOLVE 0.0% (0) · NONE 0.2% (3867). 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 … g5 15. f4 d5 16. Kh1 Nb8 (User) · 128.0M nodes · auranvesdranor-j-002-atomicdb
- 1. Nh3 e6 2. e3 g6 … g5 15. f4 d5 16. Kh1 Nxc7 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … f4 21. e5 Ra7 22. exd6 Rg7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … f4 21. e5 Ra7 22. exd6 Rh7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … f4 21. e5 Ra7 22. exd6 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 | 1100 | 2 | |
| g1h3 | unsolved | 801 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 434 | 2 | |
| e2e4 | unsolved | 417 | 2 | |
| b1c3 | unsolved | 71 | 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 | BManBJ 24.2% of the fleet | 1.30T | 9,575 |
| 2 | auranvesdranor 22.5% of the fleet | 1.21T | 9,149 |
| 3 | Torom 20.6% of the fleet | 1.10T | 7,985 |
| 4 | randomchampgamer 11.8% of the fleet | 629.47B | 4,716 |
| 5 | tenzink 10.4% of the fleet | 558.23B | 3,726 |
| 6 | JackIV 6.4% of the fleet | 340.44B | 1,462 |
| 7 | MoNiKaMaDnEsS 2.9% of the fleet | 153.37B | 939 |
| 8 | quasa 1.3% of the fleet | 66.94B | 424 |
8 accounts · 5.35T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 38.7% of the fleet | 79.65T | 677,611 |
| 2 | tenzink 16.5% of the fleet | 34.06T | 289,716 |
| 3 | auranvesdranor 11.0% of the fleet | 22.63T | 162,319 |
| 4 | BManBJ 10.7% of the fleet | 21.93T | 148,600 |
| 5 | JackIV 4.0% of the fleet | 8.29T | 58,034 |
| 6 | randomchampgamer 3.6% of the fleet | 7.39T | 52,661 |
| 7 | RickEdinson 3.1% of the fleet | 6.32T | 41,667 |
| 8 | NeoArcturus 2.0% of the fleet | 4.09T | 16,751 |
| 9 | MoNiKaMaDnEsS 1.8% of the fleet | 3.79T | 23,983 |
| 10 | ijh 1.7% of the fleet | 3.57T | 37,348 |
and 22 more.
32 accounts · 205.84T 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 18 23:06 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … f4 21. e5 Ra7 22. exd6 Kd7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 e6 8. Nxh8 Nd7 9. Bg5 g6 10. c4 Nb8 11. b4 Bh6 12. h3 b5 13. O-O a5 14. g3 axb4 15. a4 h4 16. a5 Bf8 17. Bh6 Bg7 18. g4 Nd7 19. a6 Bh8 20. Kh1 f4 21. e5 Ra7 22. exd6 Kd7 - Sep 18 23:06 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bb7 28. axb7 Bxg7 29. Qd7 Kf8
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 e6 8. Nxh8 Nd7 9. Bg5 g6 10. c4 Nb8 11. b4 Bh6 12. h3 b5 13. O-O a5 14. g3 axb4 15. a4 h4 16. a5 Bf8 17. Bh6 Bg7 18. g4 Nd7 19. a6 Bh8 20. Kh1 f4 21. e5 Ra7 22. exd6 Kd7 23. Re1 Ke8 24. cxb5 Ra8 25. Bg7 Rb8 26. d5 e5 27. dxc6 Bb7 28. axb7 Bxg7 29. Qd7 Kf8 - Sep 18 23:06 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 27. dxc6 Bb7 28. axb7 Bxg7 29. Qd7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 e6 8. Nxh8 Nd7 9. Bg5 g6 10. c4 Nb8 11. b4 Bh6 12. h3 b5 13. O-O a5 14. g3 axb4 15. a4 h4 16. a5 Bf8 17. Bh6 Bg7 18. g4 Nd7 19. a6 Bh8 20. Kh1 f4 21. e5 Ra7 22. exd6 Kd7 23. Re1 Ke8 24. cxb5 Ra8 25. Bg7 Rb8 26. d5 e5 27. dxc6 Bb7 28. axb7 Bxg7 29. Qd7 - Sep 18 23:06 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … e5 27. dxc6 Bb7 28. axb7 Bxg7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 e6 8. Nxh8 Nd7 9. Bg5 g6 10. c4 Nb8 11. b4 Bh6 12. h3 b5 13. O-O a5 14. g3 axb4 15. a4 h4 16. a5 Bf8 17. Bh6 Bg7 18. g4 Nd7 19. a6 Bh8 20. Kh1 f4 21. e5 Ra7 22. exd6 Kd7 23. Re1 Ke8 24. cxb5 Ra8 25. Bg7 Rb8 26. d5 e5 27. dxc6 Bb7 28. axb7 Bxg7 - Sep 18 23:06 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 26. d5 e5 27. dxc6 Bb7 28. axb7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 e6 8. Nxh8 Nd7 9. Bg5 g6 10. c4 Nb8 11. b4 Bh6 12. h3 b5 13. O-O a5 14. g3 axb4 15. a4 h4 16. a5 Bf8 17. Bh6 Bg7 18. g4 Nd7 19. a6 Bh8 20. Kh1 f4 21. e5 Ra7 22. exd6 Kd7 23. Re1 Ke8 24. cxb5 Ra8 25. Bg7 Rb8 26. d5 e5 27. dxc6 Bb7 28. axb7 - Sep 18 23:06 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rb8 26. d5 e5 27. dxc6 Bb7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 e6 8. Nxh8 Nd7 9. Bg5 g6 10. c4 Nb8 11. b4 Bh6 12. h3 b5 13. O-O a5 14. g3 axb4 15. a4 h4 16. a5 Bf8 17. Bh6 Bg7 18. g4 Nd7 19. a6 Bh8 20. Kh1 f4 21. e5 Ra7 22. exd6 Kd7 23. Re1 Ke8 24. cxb5 Ra8 25. Bg7 Rb8 26. d5 e5 27. dxc6 Bb7 - Sep 18 23:06 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 25. Bg7 Rb8 26. d5 e5 27. dxc6
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 e6 8. Nxh8 Nd7 9. Bg5 g6 10. c4 Nb8 11. b4 Bh6 12. h3 b5 13. O-O a5 14. g3 axb4 15. a4 h4 16. a5 Bf8 17. Bh6 Bg7 18. g4 Nd7 19. a6 Bh8 20. Kh1 f4 21. e5 Ra7 22. exd6 Kd7 23. Re1 Ke8 24. cxb5 Ra8 25. Bg7 Rb8 26. d5 e5 27. dxc6 - Sep 18 23:06 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Ra8 25. Bg7 Rb8 26. d5 e5
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 e6 8. Nxh8 Nd7 9. Bg5 g6 10. c4 Nb8 11. b4 Bh6 12. h3 b5 13. O-O a5 14. g3 axb4 15. a4 h4 16. a5 Bf8 17. Bh6 Bg7 18. g4 Nd7 19. a6 Bh8 20. Kh1 f4 21. e5 Ra7 22. exd6 Kd7 23. Re1 Ke8 24. cxb5 Ra8 25. Bg7 Rb8 26. d5 e5 - Sep 18 23:06 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 24. cxb5 Ra8 25. Bg7 Rb8 26. d5
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 e6 8. Nxh8 Nd7 9. Bg5 g6 10. c4 Nb8 11. b4 Bh6 12. h3 b5 13. O-O a5 14. g3 axb4 15. a4 h4 16. a5 Bf8 17. Bh6 Bg7 18. g4 Nd7 19. a6 Bh8 20. Kh1 f4 21. e5 Ra7 22. exd6 Kd7 23. Re1 Ke8 24. cxb5 Ra8 25. Bg7 Rb8 26. d5 - Sep 18 23:06 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Ke8 24. cxb5 Ra8 25. Bg7 Rb8
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 e6 8. Nxh8 Nd7 9. Bg5 g6 10. c4 Nb8 11. b4 Bh6 12. h3 b5 13. O-O a5 14. g3 axb4 15. a4 h4 16. a5 Bf8 17. Bh6 Bg7 18. g4 Nd7 19. a6 Bh8 20. Kh1 f4 21. e5 Ra7 22. exd6 Kd7 23. Re1 Ke8 24. cxb5 Ra8 25. Bg7 Rb8 - Sep 18 23:06 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 23. Re1 Ke8 24. cxb5 Ra8 25. Bg7
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 e6 8. Nxh8 Nd7 9. Bg5 g6 10. c4 Nb8 11. b4 Bh6 12. h3 b5 13. O-O a5 14. g3 axb4 15. a4 h4 16. a5 Bf8 17. Bh6 Bg7 18. g4 Nd7 19. a6 Bh8 20. Kh1 f4 21. e5 Ra7 22. exd6 Kd7 23. Re1 Ke8 24. cxb5 Ra8 25. Bg7 - Sep 18 23:06 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kd7 23. Re1 Ke8 24. cxb5 Ra8
1. Nf3 d6 2. Ng5 f5 3. e3 Qd7 4. Nf7 Qb5 5. Bxb5 c6 6. e4 h5 7. d4 e6 8. Nxh8 Nd7 9. Bg5 g6 10. c4 Nb8 11. b4 Bh6 12. h3 b5 13. O-O a5 14. g3 axb4 15. a4 h4 16. a5 Bf8 17. Bh6 Bg7 18. g4 Nd7 19. a6 Bh8 20. Kh1 f4 21. e5 Ra7 22. exd6 Kd7 23. Re1 Ke8 24. cxb5 Ra8