63.3M
positions
11.2M
practically solved
228.24T
engine nodes
1.8M
analyses
2,160
in queue
24
active workers
380
active cores
18.6M
nodes / sec
95.7
positions / min
125
proof number
3,794
disproof number
Root conquest: 0/20 first moves solved · 17.6% of tree positions solved · last 24h: 702,446 closures, 8.60T nodes searched
Proof health & closures by source
Proof health · median disproof number on the AND frontier: 80 over 184 open obligations, of which 30 (16.3%) sit at or below dn 2, one unanswered question from falling over · 0 open nodes on impossible numbers · measured at 2026-09-26 19:00 UTC
Closures by source, last 24h (702433 of 702433 labelled): USER 95.4% (669961) · FILL 1.1% (7527) · AUTO 3.4% (23809) · SOLVE 0.0% (0) · NONE 0.2% (1136) · last 7d (1289821 of 1289824): USER 97.3% (1254393) · FILL 0.6% (7601) · AUTO 2.0% (26015) · SOLVE 0.0% (0) · NONE 0.1% (1812). 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. d4 h5 … 4. Ng5 Na6 5. b4 d6 6. Nf7 (User) · 128.0M nodes · auranvesdranor-pop-os-atomicdb
- 1. d4 c5 2. Nh3 e5 … 4. b4 Na6 5. e4 h6 6. Nf7 (User) · 128.0M nodes · BManBJ-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 d6 … Be6 5. e3 g6 6. Bd3 f5 (User) · 128.0M nodes · BManBJ-Blake-atomicdb#1
- 1. Nf3 f6 2. Nc3 d6 … g6 9. O-O Kf7 10. c3 d5 (User) · 128.0M nodes · BManBJ-Laptop-Blake-atomicdb
- 1. Nf3 f6 2. Nc3 g6 … 10. O-O f5 11. c3 Bf8 12. Kh1 (User) · 128.0M nodes · NitroColoraze-zen4-16cpu-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 | 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 82.4% of the fleet | 7.09T | 47,887 |
| 2 | BManBJ 5.7% of the fleet | 492.79B | 3,837 |
| 3 | tenzink 5.6% of the fleet | 481.27B | 3,216 |
| 4 | randomchampgamer 2.1% of the fleet | 182.93B | 1,455 |
| 5 | auranvesdranor 1.8% of the fleet | 158.72B | 1,182 |
| 6 | RickEdinson 1.3% of the fleet | 108.86B | 861 |
| 7 | MoNiKaMaDnEsS 0.9% of the fleet | 80.84B | 633 |
| 8 | RandomMatrix <0.1% of the fleet | 4.22B | 33 |
| 9 | Torom <0.1% of the fleet | 3.44B | 8 |
9 accounts · 8.61T nodes searched by the whole fleet.
All time
| Place | Contributor | Nodes | Analyses |
|---|---|---|---|
| 1 | NitroColoraze 39.2% of the fleet | 89.59T | 747,767 |
| 2 | tenzink 15.6% of the fleet | 35.77T | 301,563 |
| 3 | BManBJ 11.2% of the fleet | 25.50T | 175,350 |
| 4 | auranvesdranor 11.1% of the fleet | 25.30T | 182,715 |
| 5 | JackIV 4.4% of the fleet | 10.06T | 67,859 |
| 6 | randomchampgamer 3.8% of the fleet | 8.58T | 62,251 |
| 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 · 228.70T 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 19:46 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 Nh6 … a5 24. Rb1 Ka7 25. Rb7 Ka6
1. Nh3 f6 2. Nc3 Nh6 3. d4 e5 4. Ng5 c6 5. g4 Ba3 6. bxa3 d6 7. Nxh7 exd4 8. Bg2 Bf5 9. c3 Bc2 10. Qd4 Be4 11. g5 b5 12. Bh3 b4 13. Qe3 fxg5 14. Bd7 Kf7 15. Qf4 Bf5 16. Qg5 Qxg5 17. Be6 Ke8 18. Bf7 Kd7 19. Bg5 Na6 20. Be8 Kc8 21. Bd7 Kb8 22. Bd8 Nc5 23. cxb4 a5 24. Rb1 Ka7 25. Rb7 Ka6 - Sep 26 19:46 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 Nh6 … 23. cxb4 a5 24. Rb1 Ka7 25. Rb7
1. Nh3 f6 2. Nc3 Nh6 3. d4 e5 4. Ng5 c6 5. g4 Ba3 6. bxa3 d6 7. Nxh7 exd4 8. Bg2 Bf5 9. c3 Bc2 10. Qd4 Be4 11. g5 b5 12. Bh3 b4 13. Qe3 fxg5 14. Bd7 Kf7 15. Qf4 Bf5 16. Qg5 Qxg5 17. Be6 Ke8 18. Bf7 Kd7 19. Bg5 Na6 20. Be8 Kc8 21. Bd7 Kb8 22. Bd8 Nc5 23. cxb4 a5 24. Rb1 Ka7 25. Rb7 - Sep 26 19:46 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 Nh6 … Nc5 23. cxb4 a5 24. Rb1 Ka7
1. Nh3 f6 2. Nc3 Nh6 3. d4 e5 4. Ng5 c6 5. g4 Ba3 6. bxa3 d6 7. Nxh7 exd4 8. Bg2 Bf5 9. c3 Bc2 10. Qd4 Be4 11. g5 b5 12. Bh3 b4 13. Qe3 fxg5 14. Bd7 Kf7 15. Qf4 Bf5 16. Qg5 Qxg5 17. Be6 Ke8 18. Bf7 Kd7 19. Bg5 Na6 20. Be8 Kc8 21. Bd7 Kb8 22. Bd8 Nc5 23. cxb4 a5 24. Rb1 Ka7 - Sep 26 19:46 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 Nh6 … 22. Bd8 Nc5 23. cxb4 a5 24. Rb1
1. Nh3 f6 2. Nc3 Nh6 3. d4 e5 4. Ng5 c6 5. g4 Ba3 6. bxa3 d6 7. Nxh7 exd4 8. Bg2 Bf5 9. c3 Bc2 10. Qd4 Be4 11. g5 b5 12. Bh3 b4 13. Qe3 fxg5 14. Bd7 Kf7 15. Qf4 Bf5 16. Qg5 Qxg5 17. Be6 Ke8 18. Bf7 Kd7 19. Bg5 Na6 20. Be8 Kc8 21. Bd7 Kb8 22. Bd8 Nc5 23. cxb4 a5 24. Rb1 - Sep 26 19:46 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 Nh6 … Kb8 22. Bd8 Nc5 23. cxb4 a5
1. Nh3 f6 2. Nc3 Nh6 3. d4 e5 4. Ng5 c6 5. g4 Ba3 6. bxa3 d6 7. Nxh7 exd4 8. Bg2 Bf5 9. c3 Bc2 10. Qd4 Be4 11. g5 b5 12. Bh3 b4 13. Qe3 fxg5 14. Bd7 Kf7 15. Qf4 Bf5 16. Qg5 Qxg5 17. Be6 Ke8 18. Bf7 Kd7 19. Bg5 Na6 20. Be8 Kc8 21. Bd7 Kb8 22. Bd8 Nc5 23. cxb4 a5 - Sep 26 19:46 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 Nh6 … 21. Bd7 Kb8 22. Bd8 Nc5 23. cxb4
1. Nh3 f6 2. Nc3 Nh6 3. d4 e5 4. Ng5 c6 5. g4 Ba3 6. bxa3 d6 7. Nxh7 exd4 8. Bg2 Bf5 9. c3 Bc2 10. Qd4 Be4 11. g5 b5 12. Bh3 b4 13. Qe3 fxg5 14. Bd7 Kf7 15. Qf4 Bf5 16. Qg5 Qxg5 17. Be6 Ke8 18. Bf7 Kd7 19. Bg5 Na6 20. Be8 Kc8 21. Bd7 Kb8 22. Bd8 Nc5 23. cxb4 - Sep 26 19:46 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 Nh6 … Kc8 21. Bd7 Kb8 22. Bd8 Nc5
1. Nh3 f6 2. Nc3 Nh6 3. d4 e5 4. Ng5 c6 5. g4 Ba3 6. bxa3 d6 7. Nxh7 exd4 8. Bg2 Bf5 9. c3 Bc2 10. Qd4 Be4 11. g5 b5 12. Bh3 b4 13. Qe3 fxg5 14. Bd7 Kf7 15. Qf4 Bf5 16. Qg5 Qxg5 17. Be6 Ke8 18. Bf7 Kd7 19. Bg5 Na6 20. Be8 Kc8 21. Bd7 Kb8 22. Bd8 Nc5 - Sep 26 19:46 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 Nh6 … 20. Be8 Kc8 21. Bd7 Kb8 22. Bd8
1. Nh3 f6 2. Nc3 Nh6 3. d4 e5 4. Ng5 c6 5. g4 Ba3 6. bxa3 d6 7. Nxh7 exd4 8. Bg2 Bf5 9. c3 Bc2 10. Qd4 Be4 11. g5 b5 12. Bh3 b4 13. Qe3 fxg5 14. Bd7 Kf7 15. Qf4 Bf5 16. Qg5 Qxg5 17. Be6 Ke8 18. Bf7 Kd7 19. Bg5 Na6 20. Be8 Kc8 21. Bd7 Kb8 22. Bd8 - Sep 26 19:46 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 Nh6 … Na6 20. Be8 Kc8 21. Bd7 Kb8
1. Nh3 f6 2. Nc3 Nh6 3. d4 e5 4. Ng5 c6 5. g4 Ba3 6. bxa3 d6 7. Nxh7 exd4 8. Bg2 Bf5 9. c3 Bc2 10. Qd4 Be4 11. g5 b5 12. Bh3 b4 13. Qe3 fxg5 14. Bd7 Kf7 15. Qf4 Bf5 16. Qg5 Qxg5 17. Be6 Ke8 18. Bf7 Kd7 19. Bg5 Na6 20. Be8 Kc8 21. Bd7 Kb8 - Sep 26 19:46 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 Nh6 … 19. Bg5 Na6 20. Be8 Kc8 21. Bd7
1. Nh3 f6 2. Nc3 Nh6 3. d4 e5 4. Ng5 c6 5. g4 Ba3 6. bxa3 d6 7. Nxh7 exd4 8. Bg2 Bf5 9. c3 Bc2 10. Qd4 Be4 11. g5 b5 12. Bh3 b4 13. Qe3 fxg5 14. Bd7 Kf7 15. Qf4 Bf5 16. Qg5 Qxg5 17. Be6 Ke8 18. Bf7 Kd7 19. Bg5 Na6 20. Be8 Kc8 21. Bd7 - Sep 26 19:46 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 Nh6 … Kd7 19. Bg5 Na6 20. Be8 Kc8
1. Nh3 f6 2. Nc3 Nh6 3. d4 e5 4. Ng5 c6 5. g4 Ba3 6. bxa3 d6 7. Nxh7 exd4 8. Bg2 Bf5 9. c3 Bc2 10. Qd4 Be4 11. g5 b5 12. Bh3 b4 13. Qe3 fxg5 14. Bd7 Kf7 15. Qf4 Bf5 16. Qg5 Qxg5 17. Be6 Ke8 18. Bf7 Kd7 19. Bg5 Na6 20. Be8 Kc8 - Sep 26 19:46 Solved: WHITE_WIN via MATE_PVview
1. Nh3 f6 2. Nc3 Nh6 … 18. Bf7 Kd7 19. Bg5 Na6 20. Be8
1. Nh3 f6 2. Nc3 Nh6 3. d4 e5 4. Ng5 c6 5. g4 Ba3 6. bxa3 d6 7. Nxh7 exd4 8. Bg2 Bf5 9. c3 Bc2 10. Qd4 Be4 11. g5 b5 12. Bh3 b4 13. Qe3 fxg5 14. Bd7 Kf7 15. Qf4 Bf5 16. Qg5 Qxg5 17. Be6 Ke8 18. Bf7 Kd7 19. Bg5 Na6 20. Be8