105.0M
positions
22.3M
practically solved
388.64T
engine nodes
2.9M
analyses
1,400
in queue
active workers
104
active cores
76.0M
nodes / sec
29.4
positions / min
107
proof number
4,824
disproof number
Root conquest: 0/20 first moves solved · 21.3% of tree positions solved · last 24h: 182,575 closures, 4.25T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 72 over 201 open obligations, of which 37 (18.4%) 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 3.7m (median of 64) · measured at 2026-11-01 16:00 UTC
Closures by source, last 24h (182575 of 182575 labelled): USER 99.4% (181493) · FILL 0.6% (1042) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (40) · last 7d (1296867 of 1296867): USER 97.9% (1269586) · FILL 0.8% (10614) · AUTO 1.2% (16193) · SOLVE 0.0% (0) · NONE 0.0% (474). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing all workers
- 1. d4 Na6 2. Nf3 f6 … 21. c5 Kf8 22. Rc1 Bf1 23. Be6 (User) · 128.0M nodes · acornwood
- 1. Nf3 d6 2. Ng5 f5 … a4 12. O-O Bb7 13. Qd2 f4 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#0
- 1. Nf3 d6 2. Ng5 f5 … a4 12. O-O Bb7 13. Qd2 h4 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 d6 2. Ng5 f5 … a4 12. O-O Bb7 13. Qd2 d5 (User) · 512.0M nodes · BManBJ-Blake-atomicdb#2
- 1. Nf3 d6 2. Ng5 f5 … a4 12. O-O Bb7 13. Qd2 e5 (User) · 512.0M 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 | 1179 | 2 | |
| g1h3 | unsolved | 731 | 2 | |
| d2d4 | unsolved | 439 | 2 | |
| e2e3 | unsolved | 437 | 3 | |
| e2e4 | unsolved | 400 | 2 | |
| b1c3 | unsolved | 142 | 2 | |
| b1a3 | unsolved | 0 | 3 | |
| c2c3 | unsolved | 0 | 2 | |
| g2g3 | unsolved | 0 | 2 | |
| b2b4 | unsolved | -59 | 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 | gannet 44.7% of the fleet | 1.90T | 13,665 |
| 2 | BManBJ 38.6% of the fleet | 1.64T | 6,774 |
| 3 | RickEdinson 10.8% of the fleet | 460.08B | 3,132 |
| 4 | MoNiKaMaDnEsS 4.8% of the fleet | 205.36B | 1,311 |
| 5 | soothdest 1.0% of the fleet | 42.88B | 256 |
5 accounts · 4.25T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 23.2% of the fleet | 90.30T | 751,082 |
| 2 | BManBJ 20.5% of the fleet | 79.67T | 535,215 |
| 3 | Torom 13.0% of the fleet | 50.55T | 363,522 |
| 4 | tenzink 11.0% of the fleet | 42.83T | 349,427 |
| 5 | auranvesdranor 8.1% of the fleet | 31.40T | 228,002 |
| 6 | RickEdinson 5.5% of the fleet | 21.53T | 141,181 |
| 7 | randomchampgamer 5.1% of the fleet | 19.85T | 140,897 |
| 8 | MoNiKaMaDnEsS 3.3% of the fleet | 12.66T | 87,541 |
| 9 | JackIV 2.6% of the fleet | 10.06T | 67,859 |
| 10 | gannet 2.3% of the fleet | 9.13T | 60,513 |
and 25 more.
35 accounts · 388.72T 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 · 18 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 23 proposals · see every proposal
Milestones
- Nov 01 16:25 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … h6 15. Qc6 Bd6 16. Rf1 Rf7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Na6 7. Nd8 e5 8. Nxb7 Nf6 9. f4 e4 10. Bxc6 Be7 11. Qe2 O-O 12. Qb5 d5 13. d4 Nd7 14. Ke2 h6 15. Qc6 Bd6 16. Rf1 Rf7 - Nov 01 16:25 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Ke8 27. f7 Kd7 28. f8=Q Kc6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Na6 7. Nd8 e5 8. Nxb7 Nf6 9. f4 e4 10. Bxc6 Be7 11. Qe2 O-O 12. Qb5 d5 13. d4 Nd7 14. Ke2 Rd8 15. Qxd7 g6 16. f5 g5 17. f6 Kf7 18. Rf1 h6 19. Nc3 a6 20. b3 e3 21. Ba3 h5 22. Bd6 a5 23. a4 g4 24. Rf5 h4 25. Rg5 h3 26. Rg7 Ke8 27. f7 Kd7 28. f8=Q Kc6 - Nov 01 16:25 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 26. Rg7 Ke8 27. f7 Kd7 28. f8=Q
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Na6 7. Nd8 e5 8. Nxb7 Nf6 9. f4 e4 10. Bxc6 Be7 11. Qe2 O-O 12. Qb5 d5 13. d4 Nd7 14. Ke2 Rd8 15. Qxd7 g6 16. f5 g5 17. f6 Kf7 18. Rf1 h6 19. Nc3 a6 20. b3 e3 21. Ba3 h5 22. Bd6 a5 23. a4 g4 24. Rf5 h4 25. Rg5 h3 26. Rg7 Ke8 27. f7 Kd7 28. f8=Q - Nov 01 16:25 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … h3 26. Rg7 Ke8 27. f7 Kd7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Na6 7. Nd8 e5 8. Nxb7 Nf6 9. f4 e4 10. Bxc6 Be7 11. Qe2 O-O 12. Qb5 d5 13. d4 Nd7 14. Ke2 Rd8 15. Qxd7 g6 16. f5 g5 17. f6 Kf7 18. Rf1 h6 19. Nc3 a6 20. b3 e3 21. Ba3 h5 22. Bd6 a5 23. a4 g4 24. Rf5 h4 25. Rg5 h3 26. Rg7 Ke8 27. f7 Kd7 - Nov 01 16:25 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 25. Rg5 h3 26. Rg7 Ke8 27. f7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Na6 7. Nd8 e5 8. Nxb7 Nf6 9. f4 e4 10. Bxc6 Be7 11. Qe2 O-O 12. Qb5 d5 13. d4 Nd7 14. Ke2 Rd8 15. Qxd7 g6 16. f5 g5 17. f6 Kf7 18. Rf1 h6 19. Nc3 a6 20. b3 e3 21. Ba3 h5 22. Bd6 a5 23. a4 g4 24. Rf5 h4 25. Rg5 h3 26. Rg7 Ke8 27. f7 - Nov 01 16:25 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … h4 25. Rg5 h3 26. Rg7 Ke8
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Na6 7. Nd8 e5 8. Nxb7 Nf6 9. f4 e4 10. Bxc6 Be7 11. Qe2 O-O 12. Qb5 d5 13. d4 Nd7 14. Ke2 Rd8 15. Qxd7 g6 16. f5 g5 17. f6 Kf7 18. Rf1 h6 19. Nc3 a6 20. b3 e3 21. Ba3 h5 22. Bd6 a5 23. a4 g4 24. Rf5 h4 25. Rg5 h3 26. Rg7 Ke8 - Nov 01 16:25 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 24. Rf5 h4 25. Rg5 h3 26. Rg7
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Na6 7. Nd8 e5 8. Nxb7 Nf6 9. f4 e4 10. Bxc6 Be7 11. Qe2 O-O 12. Qb5 d5 13. d4 Nd7 14. Ke2 Rd8 15. Qxd7 g6 16. f5 g5 17. f6 Kf7 18. Rf1 h6 19. Nc3 a6 20. b3 e3 21. Ba3 h5 22. Bd6 a5 23. a4 g4 24. Rf5 h4 25. Rg5 h3 26. Rg7 - Nov 01 16:25 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … g4 24. Rf5 h4 25. Rg5 h3
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Na6 7. Nd8 e5 8. Nxb7 Nf6 9. f4 e4 10. Bxc6 Be7 11. Qe2 O-O 12. Qb5 d5 13. d4 Nd7 14. Ke2 Rd8 15. Qxd7 g6 16. f5 g5 17. f6 Kf7 18. Rf1 h6 19. Nc3 a6 20. b3 e3 21. Ba3 h5 22. Bd6 a5 23. a4 g4 24. Rf5 h4 25. Rg5 h3 - Nov 01 16:25 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 23. a4 g4 24. Rf5 h4 25. Rg5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Na6 7. Nd8 e5 8. Nxb7 Nf6 9. f4 e4 10. Bxc6 Be7 11. Qe2 O-O 12. Qb5 d5 13. d4 Nd7 14. Ke2 Rd8 15. Qxd7 g6 16. f5 g5 17. f6 Kf7 18. Rf1 h6 19. Nc3 a6 20. b3 e3 21. Ba3 h5 22. Bd6 a5 23. a4 g4 24. Rf5 h4 25. Rg5 - Nov 01 16:25 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 22. Ba3 e3 23. Rf5 h4 24. Bd6
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Na6 7. Nd8 e5 8. Nxb7 Nf6 9. f4 e4 10. Bxc6 Be7 11. Qe2 O-O 12. Qb5 d5 13. d4 Nd7 14. Ke2 Rd8 15. Qxd7 g6 16. f5 g5 17. f6 Kf7 18. Rf1 h6 19. Nc3 a6 20. b3 a5 21. a4 h5 22. Ba3 e3 23. Rf5 h4 24. Bd6 - Nov 01 16:25 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … h5 22. Ba3 e3 23. Rf5 h4
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Na6 7. Nd8 e5 8. Nxb7 Nf6 9. f4 e4 10. Bxc6 Be7 11. Qe2 O-O 12. Qb5 d5 13. d4 Nd7 14. Ke2 Rd8 15. Qxd7 g6 16. f5 g5 17. f6 Kf7 18. Rf1 h6 19. Nc3 a6 20. b3 a5 21. a4 h5 22. Ba3 e3 23. Rf5 h4 - Nov 01 16:25 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 21. a4 h5 22. Ba3 e3 23. Rf5
1. Nf3 d6 2. Ng5 f5 3. Nf7 Qd7 4. e4 c6 5. Bb5 Qe6 6. exf5 Na6 7. Nd8 e5 8. Nxb7 Nf6 9. f4 e4 10. Bxc6 Be7 11. Qe2 O-O 12. Qb5 d5 13. d4 Nd7 14. Ke2 Rd8 15. Qxd7 g6 16. f5 g5 17. f6 Kf7 18. Rf1 h6 19. Nc3 a6 20. b3 a5 21. a4 h5 22. Ba3 e3 23. Rf5