63.2M
positions
11.2M
practically solved
227.80T
engine nodes
1.8M
analyses
6,805
in queue
23
active workers
368
active cores
26.4M
nodes / sec
90.4
positions / min
125
proof number
3,794
disproof number
Root conquest: 0/20 first moves solved · 17.6% of tree positions solved · last 24h: 722,667 closures, 8.48T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 80 over 185 open obligations, of which 30 (16.2%) 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 1.2d (median of 19) · measured at 2026-09-26 18:00 UTC
Closures by source, last 24h (722581 of 722667 labelled): USER 95.4% (689553) · FILL 1.0% (7185) · AUTO 3.4% (24715) · SOLVE 0.0% (0) · NONE 0.2% (1128) · last 7d (1301323 of 1301323): USER 97.4% (1267530) · FILL 0.6% (7185) · AUTO 1.9% (24801) · SOLVE 0.0% (0) · NONE 0.1% (1807). Labelling started at deploy: closures older than that carry no source and are counted in none of the shares above.
Now analyzing
- 1. e4 d5 2. Nf3 e5 3. d4 g5 4. Na3 Na6 5. Nb5 Bh6 (User) · 128.0M nodes · auranvesdranor-admin-835912-atomicdb
- 1. Nh3 e6 2. e3 h6 … Nf6 8. f3 O-O 9. d4 Bxc3 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. Nf3 f6 2. Nc3 g6 … Bd6 11. e4 b6 12. O-O Ra6 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 g6 … Rb8 11. O-O Rc8 12. Qg4 Rc4 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. e4 d5 2. Nf3 e5 3. d4 g5 4. Na3 Qe7 5. Nb5 Qb4 (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 | 1025 | 2 | |
| g1h3 | unsolved | 674 | 2 | |
| e2e3 | unsolved | 505 | 3 | |
| e2e4 | unsolved | 417 | 2 | |
| d2d4 | unsolved | 388 | 2 | |
| b1c3 | unsolved | 159 | 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 | -302 | 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 | NitroColoraze 82.7% of the fleet | 7.01T | 47,368 |
| 2 | BManBJ 5.8% of the fleet | 492.63B | 3,848 |
| 3 | tenzink 5.7% of the fleet | 481.64B | 3,223 |
| 4 | randomchampgamer 2.0% of the fleet | 165.94B | 1,323 |
| 5 | RickEdinson 1.4% of the fleet | 122.39B | 968 |
| 6 | auranvesdranor 1.4% of the fleet | 120.90B | 883 |
| 7 | MoNiKaMaDnEsS 1.0% of the fleet | 80.84B | 633 |
| 8 | Torom <0.1% of the fleet | 3.44B | 8 |
8 accounts · 8.48T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 39.1% of the fleet | 89.09T | 743,789 |
| 2 | tenzink 15.7% of the fleet | 35.75T | 301,390 |
| 3 | BManBJ 11.2% of the fleet | 25.45T | 174,942 |
| 4 | auranvesdranor 11.1% of the fleet | 25.26T | 182,417 |
| 5 | JackIV 4.4% of the fleet | 10.06T | 67,859 |
| 6 | randomchampgamer 3.8% of the fleet | 8.56T | 62,069 |
| 7 | RickEdinson 2.8% of the fleet | 6.50T | 43,070 |
| 8 | NeoArcturus 1.8% of the fleet | 4.09T | 16,756 |
| 9 | MoNiKaMaDnEsS 1.8% of the fleet | 4.04T | 25,901 |
| 10 | ijh 1.6% of the fleet | 3.57T | 37,348 |
and 22 more.
32 accounts · 228.05T 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 21 proposals · see every proposal
Milestones
- Sep 26 18:54 Solved: BLACK_WIN via MINIMAXview
1. Nh3 c6 2. Ng5 f6 … 10. c4 Qg5 11. h4 g6 12. e5
1. Nh3 c6 2. Ng5 f6 3. Nc3 d6 4. Nxh7 Qa5 5. f3 Bg4 6. e4 Be6 7. b4 Qb5 8. Nb1 Bg8 9. Kf2 a5 10. c4 Qg5 11. h4 g6 12. e5 - Sep 26 18:54 Solved: WHITE_WIN via MINIMAXview
1. Nf3 f6 2. Nd4 d6 … a6 9. axb5 Kd8 10. Bd2 e5
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Ne7 7. d4 b5 8. a4 a6 9. axb5 Kd8 10. Bd2 e5 - Sep 26 18:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … Kc7 20. Ra8 Rxa8 21. Qc6 Kb8
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Ne7 7. d4 b5 8. a4 a6 9. axb5 Kd8 10. Bd2 e5 11. e4 h5 12. Ba5 Kc8 13. c3 Rb8 14. Bb5 Nc6 15. Qb3 d5 16. exd5 Rb6 17. Bxa6 Bb4 18. Qe6 Kb7 19. cxb4 Kc7 20. Ra8 Rxa8 21. Qc6 Kb8 - Sep 26 18:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … 19. cxb4 Kc7 20. Ra8 Rxa8 21. Qc6
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Ne7 7. d4 b5 8. a4 a6 9. axb5 Kd8 10. Bd2 e5 11. e4 h5 12. Ba5 Kc8 13. c3 Rb8 14. Bb5 Nc6 15. Qb3 d5 16. exd5 Rb6 17. Bxa6 Bb4 18. Qe6 Kb7 19. cxb4 Kc7 20. Ra8 Rxa8 21. Qc6 - Sep 26 18:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … Kb7 19. cxb4 Kc7 20. Ra8 Rxa8
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Ne7 7. d4 b5 8. a4 a6 9. axb5 Kd8 10. Bd2 e5 11. e4 h5 12. Ba5 Kc8 13. c3 Rb8 14. Bb5 Nc6 15. Qb3 d5 16. exd5 Rb6 17. Bxa6 Bb4 18. Qe6 Kb7 19. cxb4 Kc7 20. Ra8 Rxa8 - Sep 26 18:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … 18. Qe6 Kb7 19. cxb4 Kc7 20. Ra8
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Ne7 7. d4 b5 8. a4 a6 9. axb5 Kd8 10. Bd2 e5 11. e4 h5 12. Ba5 Kc8 13. c3 Rb8 14. Bb5 Nc6 15. Qb3 d5 16. exd5 Rb6 17. Bxa6 Bb4 18. Qe6 Kb7 19. cxb4 Kc7 20. Ra8 - Sep 26 18:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … Bb4 18. Qe6 Kb7 19. cxb4 Kc7
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Ne7 7. d4 b5 8. a4 a6 9. axb5 Kd8 10. Bd2 e5 11. e4 h5 12. Ba5 Kc8 13. c3 Rb8 14. Bb5 Nc6 15. Qb3 d5 16. exd5 Rb6 17. Bxa6 Bb4 18. Qe6 Kb7 19. cxb4 Kc7 - Sep 26 18:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … 17. Bxa6 Bb4 18. Qe6 Kb7 19. cxb4
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Ne7 7. d4 b5 8. a4 a6 9. axb5 Kd8 10. Bd2 e5 11. e4 h5 12. Ba5 Kc8 13. c3 Rb8 14. Bb5 Nc6 15. Qb3 d5 16. exd5 Rb6 17. Bxa6 Bb4 18. Qe6 Kb7 19. cxb4 - Sep 26 18:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … Rb6 17. Bxa6 Bb4 18. Qe6 Kb7
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Ne7 7. d4 b5 8. a4 a6 9. axb5 Kd8 10. Bd2 e5 11. e4 h5 12. Ba5 Kc8 13. c3 Rb8 14. Bb5 Nc6 15. Qb3 d5 16. exd5 Rb6 17. Bxa6 Bb4 18. Qe6 Kb7 - Sep 26 18:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … 16. exd5 Rb6 17. Bxa6 Bb4 18. Qe6
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Ne7 7. d4 b5 8. a4 a6 9. axb5 Kd8 10. Bd2 e5 11. e4 h5 12. Ba5 Kc8 13. c3 Rb8 14. Bb5 Nc6 15. Qb3 d5 16. exd5 Rb6 17. Bxa6 Bb4 18. Qe6 - Sep 26 18:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … d5 16. exd5 Rb6 17. Bxa6 Bb4
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Ne7 7. d4 b5 8. a4 a6 9. axb5 Kd8 10. Bd2 e5 11. e4 h5 12. Ba5 Kc8 13. c3 Rb8 14. Bb5 Nc6 15. Qb3 d5 16. exd5 Rb6 17. Bxa6 Bb4 - Sep 26 18:54 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nd4 d6 … 15. Qb3 d5 16. exd5 Rb6 17. Bxa6
1. Nf3 f6 2. Nd4 d6 3. Ne6 Bxe6 4. Nc3 e6 5. Nd5 Qc8 6. Nxc7 Ne7 7. d4 b5 8. a4 a6 9. axb5 Kd8 10. Bd2 e5 11. e4 h5 12. Ba5 Kc8 13. c3 Rb8 14. Bb5 Nc6 15. Qb3 d5 16. exd5 Rb6 17. Bxa6