76.6M
positions
14.4M
practically solved
275.73T
engine nodes
2.1M
analyses
13
in queue
17
active workers
80
active cores
61.7M
nodes / sec
11.1
positions / min
82
proof number
3,796
disproof number
Root conquest: 0/20 first moves solved · 18.8% of tree positions solved · last 24h: 246,446 closures, 4.11T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 69 over 218 open obligations, of which 42 (19.3%) 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 33s (median of 26) · measured at 2026-10-06 20:00 UTC
Closures by source, last 24h (246446 of 246446 labelled): USER 99.8% (246073) · FILL 0.1% (294) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (79) · last 7d (2076311 of 2076311): USER 99.8% (2071278) · FILL 0.0% (294) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (4739). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nf3 f6 2. e4 e6 … Rb4 24. g6 Bg7 25. b3 Rd4 (Fill) · 2.00B nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … Bc1 24. b4 Kd6 25. a3 Ba6 (Fill) · 2.00B nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e4 d5 3. Nc3 d4 (User) · 10.00B nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 f6 2. e4 e6 … Be6 25. Rxh2 Kh6 26. d5 Bg4 (Fill) · 2.00B nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 d5 3. Nc3 h5 (User) · 10.00B nodes · randomchampgamer-2026PC-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 | 1104 | 2 | |
| g1h3 | unsolved | 777 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| d2d4 | unsolved | 347 | 2 | |
| b1c3 | unsolved | 105 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | -73 | 3 | |
| h2h3 | unsolved | -97 | 2 | |
| d2d3 | unsolved | -98 | 2 | |
| a2a3 | unsolved | -100 | 2 | |
| f2f3 | unsolved | -117 | 3 | |
| b2b3 | unsolved | -144 | 1 | |
| f2f4 | unsolved | -260 | 3 | |
| h2h4 | unsolved | -500 | 2 | |
| a2a4 | unsolved | -514 | 2 | |
| g2g4 | unsolved | -604 | 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 37.1% of the fleet | 1.52T | 9,648 |
| 2 | tenzink 16.3% of the fleet | 668.38B | 4,178 |
| 3 | randomchampgamer 15.2% of the fleet | 622.91B | 3,820 |
| 4 | Torom 14.9% of the fleet | 611.19B | 4,096 |
| 5 | RickEdinson 11.1% of the fleet | 456.93B | 2,767 |
| 6 | MoNiKaMaDnEsS 5.5% of the fleet | 225.02B | 1,447 |
6 accounts · 4.11T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 32.7% of the fleet | 90.30T | 751,082 |
| 2 | tenzink 15.3% of the fleet | 42.11T | 344,597 |
| 3 | BManBJ 14.4% of the fleet | 39.72T | 278,975 |
| 4 | auranvesdranor 11.4% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.4% of the fleet | 14.86T | 109,317 |
| 6 | JackIV 3.6% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 3.6% of the fleet | 9.84T | 65,739 |
| 8 | gannet 2.6% of the fleet | 7.24T | 46,848 |
| 9 | MoNiKaMaDnEsS 2.1% of the fleet | 5.77T | 38,603 |
| 10 | NeoArcturus 1.5% of the fleet | 4.09T | 16,758 |
and 25 more.
35 accounts · 275.91T 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 · 17 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
- Is Nh3 h6 e3 e6 Nc3 a draw?1. Nh3 e6 2. e3 h6 3. Nc3proposed by soothdest · 5 votes
- The weaker of the two f-pawn advances for 1. ...d61. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4proposed by MoNiKaMaDnEsS · 4 votes
- Refuting 1... d61. Nf3 d6 2. Nc3proposed by randomchampgamer · 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
Showing the 6 most voted of 21 proposals · see every proposal
Milestones
- Oct 06 20:41 Solved: WHITE_WIN via MINIMAXview
1. e4 d6 2. Nh3 f5 … b6 9. Nc3 e6 10. Nb5 Ba6
1. e4 d6 2. Nh3 f5 3. Bb5 c6 4. Ng5 g6 5. Nf7 Qd7 6. d4 h5 7. Bxc6 Nc6 8. Qe2 b6 9. Nc3 e6 10. Nb5 Ba6 - Oct 06 20:41 Solved: WHITE_WIN via MATE_PVview
1. e4 d6 2. Nh3 f5 … 10. Qe2 Ba6 11. Nb5 Bh6 12. Nxa7
1. e4 d6 2. Nh3 f5 3. Bb5 c6 4. Ng5 g6 5. Nf7 Qd7 6. d4 h5 7. Bxc6 Nc6 8. Bg5 e6 9. Nc3 b6 10. Qe2 Ba6 11. Nb5 Bh6 12. Nxa7 - Oct 06 20:41 Solved: WHITE_WIN via MATE_PVview
1. e4 d6 2. Nh3 f5 … b6 10. Qe2 Ba6 11. Nb5 Bh6
1. e4 d6 2. Nh3 f5 3. Bb5 c6 4. Ng5 g6 5. Nf7 Qd7 6. d4 h5 7. Bxc6 Nc6 8. Bg5 e6 9. Nc3 b6 10. Qe2 Ba6 11. Nb5 Bh6 - Oct 06 20:41 Solved: WHITE_WIN via MATE_PVview
1. e4 d6 2. Nh3 f5 … Kc8 27. Rb8 Kd7 28. Rd8 Kc6
1. e4 d6 2. Nh3 f5 3. Bb5 c6 4. Ng5 g6 5. Nf7 Qd7 6. d4 h5 7. Bxc6 Nc6 8. Bg5 e6 9. Nc3 b6 10. Qe2 Ba6 11. Nb5 Bh6 12. Nxa7 Nf6 13. Nxh8 Ng4 14. f4 b5 15. a4 Nf2 16. axb5 Nd3 17. Kf1 Kd7 18. Ra8 Kc7 19. Bd8 Kd7 20. Be7 d5 21. g3 Kc7 22. Bd6 Kb6 23. Ra6 Kb7 24. Ra7 Kc8 25. Rc7 Kb8 26. Rb7 Kc8 27. Rb8 Kd7 28. Rd8 Kc6 - Oct 06 20:41 Solved: WHITE_WIN via MATE_PVview
1. e4 d6 2. Nh3 f5 … 26. Rb7 Kc8 27. Rb8 Kd7 28. Rd8
1. e4 d6 2. Nh3 f5 3. Bb5 c6 4. Ng5 g6 5. Nf7 Qd7 6. d4 h5 7. Bxc6 Nc6 8. Bg5 e6 9. Nc3 b6 10. Qe2 Ba6 11. Nb5 Bh6 12. Nxa7 Nf6 13. Nxh8 Ng4 14. f4 b5 15. a4 Nf2 16. axb5 Nd3 17. Kf1 Kd7 18. Ra8 Kc7 19. Bd8 Kd7 20. Be7 d5 21. g3 Kc7 22. Bd6 Kb6 23. Ra6 Kb7 24. Ra7 Kc8 25. Rc7 Kb8 26. Rb7 Kc8 27. Rb8 Kd7 28. Rd8 - Oct 06 20:41 Solved: WHITE_WIN via MATE_PVview
1. e4 d6 2. Nh3 f5 … Kb8 26. Rb7 Kc8 27. Rb8 Kd7
1. e4 d6 2. Nh3 f5 3. Bb5 c6 4. Ng5 g6 5. Nf7 Qd7 6. d4 h5 7. Bxc6 Nc6 8. Bg5 e6 9. Nc3 b6 10. Qe2 Ba6 11. Nb5 Bh6 12. Nxa7 Nf6 13. Nxh8 Ng4 14. f4 b5 15. a4 Nf2 16. axb5 Nd3 17. Kf1 Kd7 18. Ra8 Kc7 19. Bd8 Kd7 20. Be7 d5 21. g3 Kc7 22. Bd6 Kb6 23. Ra6 Kb7 24. Ra7 Kc8 25. Rc7 Kb8 26. Rb7 Kc8 27. Rb8 Kd7 - Oct 06 20:41 Solved: WHITE_WIN via MATE_PVview
1. e4 d6 2. Nh3 f5 … 25. Rc7 Kb8 26. Rb7 Kc8 27. Rb8
1. e4 d6 2. Nh3 f5 3. Bb5 c6 4. Ng5 g6 5. Nf7 Qd7 6. d4 h5 7. Bxc6 Nc6 8. Bg5 e6 9. Nc3 b6 10. Qe2 Ba6 11. Nb5 Bh6 12. Nxa7 Nf6 13. Nxh8 Ng4 14. f4 b5 15. a4 Nf2 16. axb5 Nd3 17. Kf1 Kd7 18. Ra8 Kc7 19. Bd8 Kd7 20. Be7 d5 21. g3 Kc7 22. Bd6 Kb6 23. Ra6 Kb7 24. Ra7 Kc8 25. Rc7 Kb8 26. Rb7 Kc8 27. Rb8 - Oct 06 20:41 Solved: WHITE_WIN via MATE_PVview
1. e4 d6 2. Nh3 f5 … Kc8 25. Rc7 Kb8 26. Rb7 Kc8
1. e4 d6 2. Nh3 f5 3. Bb5 c6 4. Ng5 g6 5. Nf7 Qd7 6. d4 h5 7. Bxc6 Nc6 8. Bg5 e6 9. Nc3 b6 10. Qe2 Ba6 11. Nb5 Bh6 12. Nxa7 Nf6 13. Nxh8 Ng4 14. f4 b5 15. a4 Nf2 16. axb5 Nd3 17. Kf1 Kd7 18. Ra8 Kc7 19. Bd8 Kd7 20. Be7 d5 21. g3 Kc7 22. Bd6 Kb6 23. Ra6 Kb7 24. Ra7 Kc8 25. Rc7 Kb8 26. Rb7 Kc8 - Oct 06 20:41 Solved: WHITE_WIN via MATE_PVview
1. e4 d6 2. Nh3 f5 … 24. Ra7 Kc8 25. Rc7 Kb8 26. Rb7
1. e4 d6 2. Nh3 f5 3. Bb5 c6 4. Ng5 g6 5. Nf7 Qd7 6. d4 h5 7. Bxc6 Nc6 8. Bg5 e6 9. Nc3 b6 10. Qe2 Ba6 11. Nb5 Bh6 12. Nxa7 Nf6 13. Nxh8 Ng4 14. f4 b5 15. a4 Nf2 16. axb5 Nd3 17. Kf1 Kd7 18. Ra8 Kc7 19. Bd8 Kd7 20. Be7 d5 21. g3 Kc7 22. Bd6 Kb6 23. Ra6 Kb7 24. Ra7 Kc8 25. Rc7 Kb8 26. Rb7 - Oct 06 20:41 Solved: WHITE_WIN via MATE_PVview
1. e4 d6 2. Nh3 f5 … Kb7 24. Ra7 Kc8 25. Rc7 Kb8
1. e4 d6 2. Nh3 f5 3. Bb5 c6 4. Ng5 g6 5. Nf7 Qd7 6. d4 h5 7. Bxc6 Nc6 8. Bg5 e6 9. Nc3 b6 10. Qe2 Ba6 11. Nb5 Bh6 12. Nxa7 Nf6 13. Nxh8 Ng4 14. f4 b5 15. a4 Nf2 16. axb5 Nd3 17. Kf1 Kd7 18. Ra8 Kc7 19. Bd8 Kd7 20. Be7 d5 21. g3 Kc7 22. Bd6 Kb6 23. Ra6 Kb7 24. Ra7 Kc8 25. Rc7 Kb8 - Oct 06 20:41 Solved: WHITE_WIN via MATE_PVview
1. e4 d6 2. Nh3 f5 … 23. Ra6 Kb7 24. Ra7 Kc8 25. Rc7
1. e4 d6 2. Nh3 f5 3. Bb5 c6 4. Ng5 g6 5. Nf7 Qd7 6. d4 h5 7. Bxc6 Nc6 8. Bg5 e6 9. Nc3 b6 10. Qe2 Ba6 11. Nb5 Bh6 12. Nxa7 Nf6 13. Nxh8 Ng4 14. f4 b5 15. a4 Nf2 16. axb5 Nd3 17. Kf1 Kd7 18. Ra8 Kc7 19. Bd8 Kd7 20. Be7 d5 21. g3 Kc7 22. Bd6 Kb6 23. Ra6 Kb7 24. Ra7 Kc8 25. Rc7 - Oct 06 20:41 Solved: WHITE_WIN via MATE_PVview
1. e4 d6 2. Nh3 f5 … Kb6 23. Ra6 Kb7 24. Ra7 Kc8
1. e4 d6 2. Nh3 f5 3. Bb5 c6 4. Ng5 g6 5. Nf7 Qd7 6. d4 h5 7. Bxc6 Nc6 8. Bg5 e6 9. Nc3 b6 10. Qe2 Ba6 11. Nb5 Bh6 12. Nxa7 Nf6 13. Nxh8 Ng4 14. f4 b5 15. a4 Nf2 16. axb5 Nd3 17. Kf1 Kd7 18. Ra8 Kc7 19. Bd8 Kd7 20. Be7 d5 21. g3 Kc7 22. Bd6 Kb6 23. Ra6 Kb7 24. Ra7 Kc8