76.6M
positions
14.4M
practically solved
276.04T
engine nodes
2.1M
analyses
0
in queue
17
active workers
80
active cores
66.8M
nodes / sec
8.1
positions / min
82
proof number
3,796
disproof number
Root conquest: 0/20 first moves solved · 18.8% of tree positions solved · last 24h: 245,684 closures, 4.26T 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 42s (median of 73) · measured at 2026-10-06 21:00 UTC
Closures by source, last 24h (245626 of 245626 labelled): USER 99.8% (245134) · FILL 0.2% (412) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.0% (80) · last 7d (2062560 of 2062560): USER 99.8% (2057456) · FILL 0.0% (412) · AUTO 0.0% (0) · SOLVE 0.0% (0) · NONE 0.2% (4692). 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 … Kd6 25. a3 Be3 26. Rxh2 Bd2 (Fill) · 2.00B nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … Bh6 26. Rxe7 Rf2 27. g4 Bf8 (Fill) · 2.00B nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. e4 e6 … Rd8 26. Rg1 Bg4 27. d5 a6 (Fill) · 2.00B nodes · BManBJ-Blake-atomicdb#2
- 1. Nh3 d5 2. Nc3 h6 … 13. h4 g4 14. Bb5 f5 15. f4 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. e4 e6 … b5 22. g4 b4 23. g5 a4 (User) · 2.00B 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 | 1068 | 2 | |
| g1h3 | unsolved | 715 | 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 35.9% of the fleet | 1.53T | 9,499 |
| 2 | Torom 17.9% of the fleet | 764.82B | 4,403 |
| 3 | tenzink 15.5% of the fleet | 664.12B | 4,104 |
| 4 | randomchampgamer 14.7% of the fleet | 627.55B | 3,755 |
| 5 | RickEdinson 10.7% of the fleet | 457.05B | 2,688 |
| 6 | MoNiKaMaDnEsS 5.3% of the fleet | 225.02B | 1,447 |
6 accounts · 4.27T 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 | 42.13T | 344,634 |
| 3 | BManBJ 14.4% of the fleet | 39.78T | 279,117 |
| 4 | auranvesdranor 11.4% of the fleet | 31.40T | 228,002 |
| 5 | randomchampgamer 5.4% of the fleet | 14.89T | 109,340 |
| 6 | JackIV 3.6% of the fleet | 10.06T | 67,859 |
| 7 | RickEdinson 3.6% of the fleet | 9.86T | 65,755 |
| 8 | gannet 2.6% of the fleet | 7.24T | 46,848 |
| 9 | MoNiKaMaDnEsS 2.1% of the fleet | 5.77T | 38,603 |
| 10 | Torom 1.5% of the fleet | 4.17T | 31,682 |
and 25 more.
35 accounts · 276.18T 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 21:31 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 Na6 … Bc5 14. Bxb5 Kd7 15. Qd6 Kc8
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 Rc8 7. c3 Rc4 8. e3 d5 9. Qa4 b5 10. Qa5 Rd4 11. exd4 Bc5 12. d4 Bb6 13. Qa3 Bc5 14. Bxb5 Kd7 15. Qd6 Kc8 - Oct 06 21:31 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 Na6 … 13. Qa3 Bc5 14. Bxb5 Kd7 15. Qd6
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 Rc8 7. c3 Rc4 8. e3 d5 9. Qa4 b5 10. Qa5 Rd4 11. exd4 Bc5 12. d4 Bb6 13. Qa3 Bc5 14. Bxb5 Kd7 15. Qd6 - Oct 06 21:31 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 Na6 … Bb6 13. Qa3 Bc5 14. Bxb5 Kd7
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 Rc8 7. c3 Rc4 8. e3 d5 9. Qa4 b5 10. Qa5 Rd4 11. exd4 Bc5 12. d4 Bb6 13. Qa3 Bc5 14. Bxb5 Kd7 - Oct 06 21:31 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 Na6 … 12. d4 Bb6 13. Qa3 Bc5 14. Bxb5
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 Rc8 7. c3 Rc4 8. e3 d5 9. Qa4 b5 10. Qa5 Rd4 11. exd4 Bc5 12. d4 Bb6 13. Qa3 Bc5 14. Bxb5 - Oct 06 21:31 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 Na6 … Bc5 12. d4 Bb6 13. Qa3 Bc5
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 Rc8 7. c3 Rc4 8. e3 d5 9. Qa4 b5 10. Qa5 Rd4 11. exd4 Bc5 12. d4 Bb6 13. Qa3 Bc5 - Oct 06 21:31 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 Na6 … 11. exd4 Bc5 12. d4 Bb6 13. Qa3
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 Rc8 7. c3 Rc4 8. e3 d5 9. Qa4 b5 10. Qa5 Rd4 11. exd4 Bc5 12. d4 Bb6 13. Qa3 - Oct 06 21:31 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 Na6 … Rd4 11. exd4 Bc5 12. d4 Bb6
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 Rc8 7. c3 Rc4 8. e3 d5 9. Qa4 b5 10. Qa5 Rd4 11. exd4 Bc5 12. d4 Bb6 - Oct 06 21:31 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 Na6 … 10. Qa5 Rd4 11. exd4 Bc5 12. d4
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 Rc8 7. c3 Rc4 8. e3 d5 9. Qa4 b5 10. Qa5 Rd4 11. exd4 Bc5 12. d4 - Oct 06 21:31 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 Na6 … b5 10. Qa5 Rd4 11. exd4 Bc5
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 Rc8 7. c3 Rc4 8. e3 d5 9. Qa4 b5 10. Qa5 Rd4 11. exd4 Bc5 - Oct 06 21:31 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 Na6 … 9. Qa4 b5 10. Qa5 Rd4 11. exd4
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 Rc8 7. c3 Rc4 8. e3 d5 9. Qa4 b5 10. Qa5 Rd4 11. exd4 - Oct 06 21:31 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 Na6 … d5 9. Qa4 b5 10. Qa5 Rd4
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 Rc8 7. c3 Rc4 8. e3 d5 9. Qa4 b5 10. Qa5 Rd4 - Oct 06 21:31 Solved: WHITE_WIN via MATE_PVview
1. Nf3 f6 2. Nc3 Na6 … 8. e3 d5 9. Qa4 b5 10. Qa5
1. Nf3 f6 2. Nc3 Na6 3. Ng5 d6 4. Nf7 e6 5. Nb5 Nb8 6. Nxc7 Rc8 7. c3 Rc4 8. e3 d5 9. Qa4 b5 10. Qa5