56.9M
positions
9.1M
practically solved
205.84T
engine nodes
1.6M
analyses
3,037
in queue
13
active workers
94
active cores
7.4M
nodes / sec
36.2
positions / min
131
proof number
3,776
disproof number
Root conquest: 0/20 first moves solved · 16.1% of tree positions solved · last 24h: 385,620 closures, 5.36T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 70 over 164 open obligations, of which 31 (18.9%) 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 21.1m (median of 118) · measured at 2026-09-18 23:00 UTC
Closures by source, last 24h (385546 of 385620 labelled): USER 99.8% (384857) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (689) · last 7d (1673387 of 1673387): USER 98.3% (1644586) · FILL 0.2% (3855) · AUTO 1.3% (21080) · SOLVE 0.0% (0) · NONE 0.2% (3866). 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 … 15. f4 d5 16. Kh1 g4 17. Nf2 (User) · 512.0M nodes · auranvesdranor-j-002-atomicdb
- 1. Nh3 e6 2. e3 g6 … d5 16. Kh1 g4 17. a3 f5 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Bh8 20. Kh1 bxc4 21. Qb3 Rxa6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Bh8 20. Kh1 bxc4 21. Qb3 Rb8 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nd4 Nh6 3. g4 b5 4. h4 Ng8 (User) · 128.0M nodes · JackIV-customer.tmpeazx1.isp.starlink.com-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 | 1100 | 2 | |
| g1h3 | unsolved | 801 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| d2d4 | unsolved | 435 | 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 | 9,608 |
| 2 | auranvesdranor 22.0% of the fleet | 1.18T | 8,958 |
| 3 | Torom 20.5% of the fleet | 1.10T | 7,991 |
| 4 | randomchampgamer 11.7% of the fleet | 627.82B | 4,695 |
| 5 | tenzink 10.4% of the fleet | 558.69B | 3,672 |
| 6 | JackIV 7.1% of the fleet | 378.70B | 1,760 |
| 7 | MoNiKaMaDnEsS 2.9% of the fleet | 153.37B | 939 |
| 8 | quasa 1.2% of the fleet | 66.94B | 424 |
8 accounts · 5.36T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 38.6% of the fleet | 79.65T | 677,611 |
| 2 | tenzink 16.5% of the fleet | 34.09T | 289,847 |
| 3 | auranvesdranor 11.0% of the fleet | 22.67T | 162,644 |
| 4 | BManBJ 10.7% of the fleet | 21.99T | 149,064 |
| 5 | JackIV 4.0% of the fleet | 8.32T | 58,332 |
| 6 | randomchampgamer 3.6% of the fleet | 7.41T | 52,847 |
| 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 · 206.14T 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 00:03 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … Bh8 20. Kh1 bxc4 21. Qb3 Kf7
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 bxc4 21. Qb3 Kf7 - Sep 19 00:03 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 20. Kh1 bxc4 21. Qb3 Kf7 22. 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 bxc4 21. Qb3 Kf7 22. e5 - Sep 19 00:03 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … g5 27. Qb7 Nd7 28. exd6 Kg8
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 bxc4 21. Qb3 Ke7 22. e5 Ke8 23. Qb8 Kf7 24. Re1 Rxb8 25. a7 Nb8 26. a8=Q g5 27. Qb7 Nd7 28. exd6 Kg8 - Sep 19 00:03 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 26. a8=Q g5 27. Qb7 Nd7 28. exd6
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 bxc4 21. Qb3 Ke7 22. e5 Ke8 23. Qb8 Kf7 24. Re1 Rxb8 25. a7 Nb8 26. a8=Q g5 27. Qb7 Nd7 28. exd6 - Sep 19 00:03 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Nb8 26. a8=Q g5 27. Qb7 Nd7
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 bxc4 21. Qb3 Ke7 22. e5 Ke8 23. Qb8 Kf7 24. Re1 Rxb8 25. a7 Nb8 26. a8=Q g5 27. Qb7 Nd7 - Sep 19 00:03 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 25. a7 Nb8 26. a8=Q g5 27. Qb7
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 bxc4 21. Qb3 Ke7 22. e5 Ke8 23. Qb8 Kf7 24. Re1 Rxb8 25. a7 Nb8 26. a8=Q g5 27. Qb7 - Sep 19 00:03 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Rxb8 25. a7 Nb8 26. a8=Q g5
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 bxc4 21. Qb3 Ke7 22. e5 Ke8 23. Qb8 Kf7 24. Re1 Rxb8 25. a7 Nb8 26. a8=Q g5 - Sep 19 00:03 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 24. Re1 Rxb8 25. a7 Nb8 26. a8=Q
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 bxc4 21. Qb3 Ke7 22. e5 Ke8 23. Qb8 Kf7 24. Re1 Rxb8 25. a7 Nb8 26. a8=Q - Sep 19 00:03 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kf7 24. Re1 Rxb8 25. a7 Nb8
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 bxc4 21. Qb3 Ke7 22. e5 Ke8 23. Qb8 Kf7 24. Re1 Rxb8 25. a7 Nb8 - Sep 19 00:03 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 23. Qb8 Kf7 24. Re1 Rxb8 25. a7
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 bxc4 21. Qb3 Ke7 22. e5 Ke8 23. Qb8 Kf7 24. Re1 Rxb8 25. a7 - Sep 19 00:03 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Ke8 23. Qb8 Kf7 24. Re1 Rxb8
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 bxc4 21. Qb3 Ke7 22. e5 Ke8 23. Qb8 Kf7 24. Re1 Rxb8 - Sep 19 00:03 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 22. e5 Ke8 23. Qb8 Kf7 24. Re1
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 bxc4 21. Qb3 Ke7 22. e5 Ke8 23. Qb8 Kf7 24. Re1