58.4M
positions
9.6M
practically solved
210.44T
engine nodes
1.7M
analyses
12,423
in queue
12
active workers
84
active cores
15.3M
nodes / sec
28.2
positions / min
131
proof number
3,776
disproof number
Root conquest: 0/20 first moves solved · 16.5% of tree positions solved · last 24h: 604,002 closures, 6.61T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 80 over 168 open obligations, of which 28 (16.7%) 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 14.5m (median of 118) · measured at 2026-09-19 15:00 UTC
Closures by source, last 24h (603954 of 603967 labelled): USER 99.9% (603207) · FILL 0.0% (0) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.1% (747) · last 7d (2033930 of 2033965): USER 98.6% (2005439) · FILL 0.2% (3608) · AUTO 1.0% (21080) · SOLVE 0.0% (0) · NONE 0.2% (3803). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. Nh3 f5 2. e3 e6 … 11. e4 b5 12. g4 a5 13. f3 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 f5 2. e3 e6 … 11. e4 b5 12. g4 a5 13. g5 (User) · 128.0M nodes · auranvesdranor-j-002-atomicdb
- 1. Nh3 f5 2. e3 e6 … 11. e4 b5 12. g4 a5 13. e5 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Bf8 18. Na3 Rb7 19. dxc6 Kf7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 d6 2. Ng5 f5 … Bf8 18. Na3 Rb7 19. dxc6 dxe5 (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 | 720 | 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 24.0% of the fleet | 1.59T | 12,095 |
| 2 | BManBJ 21.9% of the fleet | 1.44T | 10,538 |
| 3 | JackIV 15.9% of the fleet | 1.05T | 5,699 |
| 4 | Torom 15.4% of the fleet | 1.02T | 7,308 |
| 5 | tenzink 9.0% of the fleet | 594.16B | 3,821 |
| 6 | randomchampgamer 8.5% of the fleet | 563.13B | 4,544 |
| 7 | quasa 3.2% of the fleet | 210.39B | 1,481 |
| 8 | MoNiKaMaDnEsS 1.9% of the fleet | 127.53B | 738 |
| 9 | soothdest 0.2% of the fleet | 10.29B | 79 |
| 10 | NeoArcturus <0.1% of the fleet | 640.0M | 5 |
10 accounts · 6.61T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 37.8% of the fleet | 79.65T | 677,611 |
| 2 | tenzink 16.4% of the fleet | 34.49T | 292,612 |
| 3 | auranvesdranor 11.3% of the fleet | 23.76T | 170,922 |
| 4 | BManBJ 10.9% of the fleet | 23.01T | 156,439 |
| 5 | JackIV 4.3% of the fleet | 9.00T | 62,271 |
| 6 | randomchampgamer 3.7% of the fleet | 7.77T | 55,780 |
| 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 · 210.68T 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 16:07 Solved: WHITE_WIN via MINIMAXview
1. Nf3 d6 2. Ng5 f5 … Bf8 18. Na3 Rb7 19. dxc6 Bg7
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 Na6 15. bxa6 Ra7 16. e5 Ba6 17. d5 Bf8 18. Na3 Rb7 19. dxc6 Bg7 - Sep 19 16:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kg8 25. Nxd6 Bb1 26. Qe7 Bxa2
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 Na6 15. bxa6 Ra7 16. e5 Ba6 17. d5 Bf8 18. Na3 Rb7 19. dxc6 Bg7 20. g3 Bb7 21. Nb5 Be4 22. Qa4 Kf8 23. Qa3 Bd3 24. Rfd1 Kg8 25. Nxd6 Bb1 26. Qe7 Bxa2 - Sep 19 16:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 24. Rfd1 Kg8 25. Nxd6 Bb1 26. Qe7
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 Na6 15. bxa6 Ra7 16. e5 Ba6 17. d5 Bf8 18. Na3 Rb7 19. dxc6 Bg7 20. g3 Bb7 21. Nb5 Be4 22. Qa4 Kf8 23. Qa3 Bd3 24. Rfd1 Kg8 25. Nxd6 Bb1 26. Qe7 - Sep 19 16:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bd3 24. Rfd1 Kg8 25. Nxd6 Bb1
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 Na6 15. bxa6 Ra7 16. e5 Ba6 17. d5 Bf8 18. Na3 Rb7 19. dxc6 Bg7 20. g3 Bb7 21. Nb5 Be4 22. Qa4 Kf8 23. Qa3 Bd3 24. Rfd1 Kg8 25. Nxd6 Bb1 - Sep 19 16:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 23. Qa3 Bd3 24. Rfd1 Kg8 25. Nxd6
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 Na6 15. bxa6 Ra7 16. e5 Ba6 17. d5 Bf8 18. Na3 Rb7 19. dxc6 Bg7 20. g3 Bb7 21. Nb5 Be4 22. Qa4 Kf8 23. Qa3 Bd3 24. Rfd1 Kg8 25. Nxd6 - Sep 19 16:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Kf8 23. Qa3 Bd3 24. Rfd1 Kg8
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 Na6 15. bxa6 Ra7 16. e5 Ba6 17. d5 Bf8 18. Na3 Rb7 19. dxc6 Bg7 20. g3 Bb7 21. Nb5 Be4 22. Qa4 Kf8 23. Qa3 Bd3 24. Rfd1 Kg8 - Sep 19 16:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 22. Qa4 Kf8 23. Qa3 Bd3 24. Rfd1
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 Na6 15. bxa6 Ra7 16. e5 Ba6 17. d5 Bf8 18. Na3 Rb7 19. dxc6 Bg7 20. g3 Bb7 21. Nb5 Be4 22. Qa4 Kf8 23. Qa3 Bd3 24. Rfd1 - Sep 19 16:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Be4 22. Qa4 Kf8 23. Qa3 Bd3
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 Na6 15. bxa6 Ra7 16. e5 Ba6 17. d5 Bf8 18. Na3 Rb7 19. dxc6 Bg7 20. g3 Bb7 21. Nb5 Be4 22. Qa4 Kf8 23. Qa3 Bd3 - Sep 19 16:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 21. Nb5 Be4 22. Qa4 Kf8 23. Qa3
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 Na6 15. bxa6 Ra7 16. e5 Ba6 17. d5 Bf8 18. Na3 Rb7 19. dxc6 Bg7 20. g3 Bb7 21. Nb5 Be4 22. Qa4 Kf8 23. Qa3 - Sep 19 16:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bb7 21. Nb5 Be4 22. Qa4 Kf8
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 Na6 15. bxa6 Ra7 16. e5 Ba6 17. d5 Bf8 18. Na3 Rb7 19. dxc6 Bg7 20. g3 Bb7 21. Nb5 Be4 22. Qa4 Kf8 - Sep 19 16:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … 20. g3 Bb7 21. Nb5 Be4 22. Qa4
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 Na6 15. bxa6 Ra7 16. e5 Ba6 17. d5 Bf8 18. Na3 Rb7 19. dxc6 Bg7 20. g3 Bb7 21. Nb5 Be4 22. Qa4 - Sep 19 16:07 Solved: WHITE_WIN via MATE_PVview
1. Nf3 d6 2. Ng5 f5 … Bg7 20. g3 Bb7 21. Nb5 Be4
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 Na6 15. bxa6 Ra7 16. e5 Ba6 17. d5 Bf8 18. Na3 Rb7 19. dxc6 Bg7 20. g3 Bb7 21. Nb5 Be4