Joon Cha (차준혁)

Region WCA ID Gender Competitions Completed Solves
Republic of Korea 2012CHAJ01 Male 34 994

Current Personal Records

Event NR CR WR Single Average WR CR NR
3x3x3 Cube 93 1609 4969 7.69 9.33 4317 1500 83
2x2x2 Cube 39 660 3101 1.50 3.22 4954 1270 74
4x4x4 Cube 122 1954 5607 36.89 41.35 4779 1684 106
5x5x5 Cube 116 1563 4548 1:13.72 1:20.35 4171 1450 103
6x6x6 Cube 73 930 2905 2:22.36 2:35.22 3075 983 76
7x7x7 Cube 85 1045 3183 3:54.91 4:17.27 3473 1124 91
3x3x3 Blindfolded 38 580 1797 1:15.72 1:27.12 1053 320 18
3x3x3 Fewest Moves 8 90 384 24 26.67 222 64 6
3x3x3 One-Handed 87 1705 4822 14.97 18.83 4960 1838 97
Clock 79 926 4037 8.26 9.55 3596 792 69
Megaminx 86 1188 4327 1:09.68 1:17.23 4088 1138 78
Pyraminx 95 2053 7705 3.89 7.17 11031 3180 150
Skewb 172 3342 13000 5.37 6.93 7701 2155 127
Square-1 92 1204 5411 18.90 27.35 5968 1379 106
4x4x4 Blindfolded 26 279 1084 10:19.00
3x3x3 Multi-Blind 13 135 584 10/10 51:37

Medal Collection

Gold Silver Bronze
2 1 2

Record Collection

WR CR NR
2
Competition Round Place Single Average Solves
3x3x3 Cube
Cube Against Cancer Roswell 2025 Second round 18 8.93 10.93 11.528.9312.059.5611.72
First round 23 9.42 12.08 10.2811.6614.299.4215.54
Cubing in School Westminster 2025 Second round 25 9.71 11.03 12.1010.139.7110.8514.04
First round 20 9.12 11.11 10.969.969.1212.4013.85
Middle Georgia Big Cube Showdown 2025 Final 17 8.88 10.71 8.8812.5910.6211.3110.20
Second round 9 7.96 9.33 7.968.9510.8310.049.00
First round 18 9.09 11.80 12.169.0912.0313.0111.20
GA Cuber Jackets Spring 2025 Final 15 11.12 11.75 11.9911.8414.9311.1211.42
Semi Final 16 7.69 10.20 7.6911.0610.429.1311.85
Second round 26 10.32 11.41 10.9911.6910.3212.1311.55
First round 31 10.13 11.52 11.0510.1312.79DNF10.71
Atlanta Algs at AIS 2025 Final 16 9.58 10.38 10.9210.6410.439.5810.06
First round 18 9.12 11.28 13.0211.079.1211.9010.86
GA Cuber Jackets Fall 2024 Second round 22 9.27 10.32 9.499.27DNF9.3512.12
First round 28 10.36 11.26 14.8410.5111.0012.2810.36
Prime Cubing Day Seoul 2024 First round 35 9.36 11.26 10.919.3611.3811.4813.95
Anyang Haseyo 2024 First round 25 8.66 10.68 14.488.6611.159.8911.01
Seoul Open 2024 Second round 24 9.76 10.65 9.779.7612.7412.289.89
First round 19 8.79 10.27 9.0012.768.7911.2510.55
Korean Championship 2023 Semi Final 18 8.19 10.31 11.6810.448.808.1911.75
Second round 18 9.49 10.06 10.1010.1710.509.929.49
First round 19 8.13 10.06 10.8310.4310.068.139.70
Suncheon Fall 2023 Semi Final 20 9.95 10.78 11.6710.259.9512.9310.43
Second round 24 9.37 10.75 10.4211.329.3711.8710.52
First round 20 9.55 11.12 12.0412.489.559.8011.52
Rubik's WCA World Championship 2023 Second round 316 8.86 10.42 9.8711.6313.179.768.86
First round 373 9.15 10.48 9.159.3613.8410.6811.41
Seoul Spring 2023 First round 48 11.62 12.20 13.5711.6212.8411.7112.06
Daegu Hot Spring 2023 First round 29 10.26 11.62 16.7912.2210.2611.8010.84
3x3x3 HanMaDang 2017 Final 12 9.94 10.64 9.9412.3910.5310.0511.35
First round 13 8.39 10.74 12.349.7810.5811.868.39
Busan Summer 2014 Final 6 10.12 11.57 10.1210.6313.2112.7111.38
First round 6 9.89 11.32 12.3110.409.8911.2514.15
National Capital Region 2014 Final 8 11.02 12.54 11.4014.3111.0213.6812.55
Second round 7 10.05 10.60 10.1910.9610.0511.3110.65
First round 8 11.56 12.24 12.5611.5614.9012.3111.86
Toronto Open Spring 2014 Final 6 10.50 12.33 13.3311.7510.5011.9214.30
Second round 5 9.53 11.37 11.2111.0117.229.5311.90
First round 6 10.39 11.02 11.7610.6710.3916.2010.63
Montréal Open 2014 Final 5 10.27 12.71 14.5013.2310.2712.7612.14
Second round 5 10.59 11.99 12.3812.4310.5916.2111.16
First round 5 10.00 11.46 10.0012.6810.6611.0513.06
Canadian Open 2013 Second round 27 11.68 14.27 14.9014.5611.6813.3418.40
First round 19 11.47 13.19 13.7812.9313.1511.4713.50
National Capital Region 2013 Final 9 11.81 13.59 13.4413.7214.2513.6111.81
Second round 9 12.81 14.21 14.0016.6514.3012.8114.34
First round 9 12.46 15.00 15.1514.9615.0512.4615.00
Montréal Open 2013 Final 11 11.25 15.70 16.5316.8613.7111.2518.19
Second round 8 12.31 12.98 13.3312.9417.0612.3112.68
First round 11 12.78 15.06 12.7816.0016.0915.3813.81
Toronto Open Winter 2013 Second round 25 11.69 16.39 DNF14.8011.6914.8019.58
First round 14 11.72 14.86 16.6311.7214.9013.0516.77
Toronto Summer 2012 Second round 24 15.02 16.53 18.4317.2216.0816.2815.02
First round 23 13.38 15.92 13.3814.4717.5515.7518.75
2x2x2 Cube
Cube Against Cancer Roswell 2025 Final 14 3.32 3.95 3.324.573.705.883.58
First round 13 2.52 3.57 2.523.683.894.253.14
GA Cuber Jackets Spring 2025 First round 28 2.38 4.12 4.452.384.523.408.22
Atlanta Algs at AIS 2025 Final 19 3.07 3.92 3.073.744.354.333.69
GA Cubers Go Bananas 2024 First round 15 3.16 3.98 3.493.1610.134.683.78
GA Cuber Jackets Fall 2024 First round 21 3.27 3.37 5.033.383.433.273.29
Prime Cubing Day Seoul 2024 First round 27 3.62 4.17 4.073.925.673.624.52
Korean Championship 2023 Second round 14 3.26 3.75 3.263.835.623.983.45
First round 7 2.65 3.28 3.323.854.312.682.65
Ansan Autumn 2023 First round 32 3.79 4.57 4.684.854.973.794.18
Rubik's WCA World Championship 2023 First round 244 2.92 3.92 4.343.545.602.923.88
Seoul Spring 2023 Final 64 3.50 5.43 5.325.488.423.505.49
Daegu Hot Spring 2023 Final 10 2.90 3.57 5.183.092.903.933.70
Busan Summer 2014 Final 3 2.32 3.22 2.324.433.542.803.31
First round 2 2.22 3.60 3.644.093.362.223.80
National Capital Region 2014 Final 5 2.25 3.88 4.442.254.632.814.40
Second round 4 2.77 3.69 3.664.724.192.773.22
First round 6 2.30 4.18 3.274.592.306.614.68
Toronto Open Spring 2014 Second round 13 3.21 4.84 4.396.075.174.963.21
First round 10 3.19 4.29 3.983.875.223.195.02
Montréal Open 2014 Final 5 3.64 4.45 5.613.923.6410.353.81
Second round 4 3.96 4.52 4.584.476.103.964.52
First round 5 3.76 5.24 6.13DNF3.764.804.78
Canadian Open 2013 Second round 14 4.59 5.03 5.115.274.595.344.71
First round 16 3.93 4.80 4.976.845.153.934.28
National Capital Region 2013 Final 7 1.50 NR 4.24 4.691.504.255.653.78
Second round 6 4.78 5.20 4.906.214.785.255.44
First round 4 3.93 4.54 4.054.753.937.774.83
Montréal Open 2013 Final 6 2.96 4.61 4.554.934.634.662.96
Second round 6 3.61 5.10 6.905.653.614.974.68
First round 6 3.52 4.93 5.133.525.535.434.22
Toronto Open Winter 2013 Final 7 3.66 4.39 4.654.113.664.418.00
Second round 8 4.13 4.65 4.504.865.314.134.59
First round 12 4.11 4.81 5.034.596.464.814.11
Toronto Summer 2012 First round 24 6.00 6.90 6.228.728.066.006.43
4x4x4 Cube
GA Cuber Jackets Spring 2025 First round 25 42.64 47.82 50.1847.2142.6448.3447.92
Seoul Open 2024 First round 22 36.89 43.00 43.1536.8947.9542.7543.10
Korean Championship 2023 First round 15 38.61 41.35 40.7643.2140.0838.6145.25
Rubik's WCA World Championship 2023 First round 475 48.18 53.52 55.4051.2053.9648.181:00.60
Daegu Hot Spring 2023 First round 15 38.97 45.26 48.4843.4438.9746.5045.85
National Capital Region 2014 Final 6 42.96 49.63 50.1152.0242.9652.3346.77
Toronto Open Spring 2014 Final 11 44.27 53.06 53.5644.2754.2851.3455.24
Montréal Open 2014 Final 5 41.66 46.31 45.9254.7441.6644.9748.05
Canadian Open 2013 First round 13 53.91 56.29 56.6554.831:01.1953.9157.38
National Capital Region 2013 Final 7 54.27 1:02.10 59.361:05.6154.271:03.381:03.56
First round 7 54.33 59.61 54.3356.911:01.971:10.8059.96
Montréal Open 2013 Final 9 1:02.72 1:10.57 1:03.751:18.131:10.691:17.281:02.72
Toronto Open Winter 2013 Final 40 DNF DNFDNF
Toronto Summer 2012 Final 23 1:21.59 1:21.591:24.84
5x5x5 Cube
Cube Against Cancer Roswell 2025 Final 28 1:29.94 1:53.46 1:36.70DNF1:29.942:12.591:51.10
Cubing in School Westminster 2025 Final 13 1:22.47 1:25.16 1:25.341:25.491:24.651:31.581:22.47
Middle Georgia Big Cube Showdown 2025 First round 15 1:17.42 1:20.35 1:29.291:23.191:19.801:17.421:18.05
Prime Cubing Day Seoul 2024 First round 32 1:13.72 1:21.86 2:01.601:22.111:13.721:21.151:22.32
Korean Championship 2023 First round 25 1:20.69 1:26.61 1:25.201:27.151:27.481:28.271:20.69
Ansan Autumn 2023 First round 21 1:13.87 1:24.62 1:26.311:13.871:17.511:30.601:30.03
Rubik's WCA World Championship 2023 First round 372 1:24.95 1:34.07 1:37.671:24.951:41.021:38.671:25.88
Daegu Hot Spring 2023 First round 21 1:30.42 1:34.84 1:36.151:37.781:31.891:30.421:36.48
Toronto Open Spring 2014 Final 12 1:53.32 2:02.50 1:55.892:20.042:02.792:08.811:53.32
Canadian Open 2013 First round 17 1:45.78 1:58.30 2:04.181:54.502:05.381:56.211:45.78
Montréal Open 2013 Final 10 2:52.44 2:52.932:52.44
Toronto Open Winter 2013 Final 13 2:22.69 2:22.692:28.28
6x6x6 Cube
Middle Georgia Big Cube Showdown 2025 Final 12 2:22.36 2:47.60 3:05.832:54.612:22.36
First round 12 2:24.04 2:35.22 2:24.042:52.542:29.08
Rubik's WCA World Championship 2023 First round 277 3:09.79 3:09.79
Daegu Hot Spring 2023 Final 15 2:57.49 3:06.22 3:17.452:57.493:03.73
Montréal Open 2014 Final 6 3:53.62 4:00.19 3:53.624:02.254:04.71
Canadian Open 2013 Final 12 4:09.19 4:19.73 4:09.194:18.694:31.30
7x7x7 Cube
Middle Georgia Big Cube Showdown 2025 First round 14 4:00.15 4:19.62 4:11.354:47.374:00.15
GA Cuber Jackets Warm Up 2025 Final 14 4:40.16 4:40.16
Prime Cubing Day Seoul 2024 First round 26 4:08.33 4:17.27 4:13.244:08.334:30.24
Rubik's WCA World Championship 2023 First round 179 3:54.91 4:20.67 3:54.914:59.004:08.11
Seoul Spring 2023 Final 21 4:12.75 4:26.66 4:43.594:12.754:23.65
Canadian Open 2013 Final 21 DNF DNF
3x3x3 Blindfolded
GA Cuber Jackets Warm Up 2025 Final 9 1:51.99 DNF 1:51.99DNFDNF
First round 5 1:24.43 1:31.75 1:32.331:24.431:38.50
GA Cubers Please Banana Quiet 2025 Final 4 1:19.90 DNF DNF1:47.361:19.90
Silent Korea Winter 2024 Final 10 1:15.72 1:27.12 1:15.721:20.291:45.35
Silent Korea Spring 2024 Final 10 1:42.50 DNF 1:42.50DNFDNF
Second round 12 1:25.08 DNF DNFDNF1:25.08
First round 20 3:10.49 DNF DNF3:10.49DNF
Korean Championship 2023 First round 9 1:42.62 DNF DNF1:42.62DNF
Rubik's WCA World Championship 2023 First round 142 2:12.85 DNF DNF2:16.752:12.85
Seoul Spring 2023 Final 13 2:22.34 2:30.99 2:22.342:35.712:34.93
3x3x3 HanMaDang 2017 Final 13 5:37.08 DNF DNF5:37.086:14.90
Busan Summer 2014 Final 5 2:51.09 4:16.70 5:41.114:17.902:51.09
National Capital Region 2014 Final 7 3:30.33 DNF DNFDNF3:30.33
Toronto Open Spring 2014 Final 8 3:26.40 DNF 3:26.40DNF3:56.93
Canadian Open 2013 First round 13 4:12.96 DNF 4:12.96DNFDNF
National Capital Region 2013 Final 7 5:22.21 DNF 5:22.21DNFDNF
3x3x3 Fewest Moves
CubingUSA Southeast FMC Championship 2025 Final 3 24 26.67 302624
GA Cubers Please Banana Quiet 2025 Final 1 28 30.67 283529
Silent Korea Winter 2024 Final 19 31 DNF DNFDNF31
FMC Korea Spring 2024 Final 6 32 34.00 363234
Korean FMC Championship 2023 Final 5 29 31.67 293333
First round 7 29 32.67 293732
Rubik's WCA World Championship 2023 Final 38 29 31.33 293431
FMC Korea 2023 Final 4 31 34.33 313339
3x3x3 HanMaDang 2017 Final 8 44 44
Montréal Open 2013 Final 1 25 NR 25
3x3x3 One-Handed
Cube Against Cancer Roswell 2025 Final 12 16.87 18.83 24.1116.8717.5318.9120.04
First round 15 14.97 19.55 18.9014.9722.6719.8419.92
Atlanta Algs at AIS 2025 Final 16 16.46 19.75 21.1916.4623.0417.2520.82
Korean Championship 2023 First round 20 18.61 21.51 26.0522.2618.6122.6619.61
Rubik's WCA World Championship 2023 First round 306 19.12 22.13 22.6419.5634.2619.1224.20
Daegu Hot Spring 2023 Final 37 22.65 28.51 33.6228.9423.6122.6532.97
3x3x3 HanMaDang 2017 First round 18 19.93 21.64 21.9122.1125.1019.9320.90
National Capital Region 2014 Final 8 20.72 24.35 26.4022.4326.7524.2120.72
Second round 8 16.36 21.97 21.4122.0922.4016.3624.86
First round 8 23.19 25.51 27.0324.1823.1929.4625.33
Toronto Open Spring 2014 Second round 9 21.43 24.22 21.7428.6526.9723.9521.43
First round 8 20.59 25.13 20.5921.9223.88DNF29.60
Montréal Open 2014 Final 5 19.52 20.64 19.5219.8120.7021.4122.38
Canadian Open 2013 Second round 19 21.02 27.30 21.0222.1624.0835.6538.11
First round 17 22.97 24.15 23.3122.9724.3325.6624.80
National Capital Region 2013 Final 12 27.50 33.86 35.9627.5032.9736.9132.65
Second round 12 25.28 29.24 41.2228.8625.2827.5931.27
First round 14 29.56 35.63 39.5046.9034.5832.8129.56
Montréal Open 2013 Final 11 26.78 30.92 30.8627.5034.4026.7838.11
First round 12 29.52 33.60 36.6533.9148.8629.5230.25
Toronto Open Winter 2013 Second round 20 28.46 33.67 40.0930.3328.4646.1530.59
First round 19 25.05 30.66 40.3634.3132.1325.0525.53
Clock
Cubing in School Westminster 2025 First round 36 10.30 11.47 12.5014.6611.5010.3010.42
GA Cuber Jackets Spring 2025 First round 39 10.54 10.93 11.0711.1611.2810.5610.54
GA Cubers Go Bananas 2024 First round 20 9.77 10.54 11.469.7710.219.9911.41
GA Cuber Jackets Fall 2024 First round 28 9.06 10.06 9.4210.6211.759.0610.13
Anyang Haseyo 2024 First round 20 8.26 9.55 16.829.249.398.2610.01
Ansan Autumn 2023 Final 10 10.27 10.92 10.4010.6314.8911.7410.27
First round 12 9.15 9.76 14.079.519.159.6810.10
Megaminx
Cube Against Cancer Roswell 2025 Final 10 1:13.28 1:19.08 1:20.131:13.281:17.601:20.411:19.52
Middle Georgia Big Cube Showdown 2025 First round 16 1:18.17 1:20.60 1:21.521:18.171:26.531:19.881:20.40
Atlanta Algs at AIS 2025 First round 14 1:11.58 1:21.76 1:11.581:20.601:24.041:20.651:24.28
GA Cuber Jackets Fall 2024 First round 17 1:09.68 1:17.23 1:16.031:27.421:18.321:17.341:09.68
Rubik's WCA World Championship 2023 First round 230 1:14.59 1:20.34 1:22.881:19.031:26.901:14.591:19.12
Daegu Hot Spring 2023 Final 16 1:18.04 1:26.97 1:29.821:29.231:31.681:21.861:18.04
National Capital Region 2014 Final 4 1:26.19 1:30.49 1:26.191:26.581:46.221:32.331:32.56
Montréal Open 2014 Final 5 1:23.46 1:30.94 1:32.971:24.311:23.461:37.611:35.53
Canadian Open 2013 Final 6 1:24.15 1:35.19 2:07.271:36.311:24.151:36.301:32.96
National Capital Region 2013 Final 4 1:29.47 1:35.81 1:40.221:52.781:30.691:36.521:29.47
Montréal Open 2013 Final 6 2:13.59 2:22.10 2:23.432:16.522:13.592:30.062:26.34
Toronto Open Winter 2013 Final 10 2:26.22 3:04.692:26.22
Pyraminx
Atlanta Algs at AIS 2025 Final 30 7.06 9.44 7.0612.927.8710.2610.18
First round 33 9.67 10.13 10.0210.3511.059.6710.02
Korean Championship 2023 First round 35 7.37 8.76 8.149.119.327.379.02
Rubik's WCA World Championship 2023 First round 360 8.14 9.03 8.148.159.639.3011.85
Busan Summer 2014 Final 5 3.89 7.17 16.1711.224.523.895.77
National Capital Region 2014 Final 5 7.61 9.26 8.777.6110.0011.009.02
Toronto Open Spring 2014 Final 11 7.66 8.81 10.728.0010.917.707.66
Montréal Open 2014 Final 4 8.15 8.47 8.448.558.1511.438.43
Canadian Open 2013 Final 10 7.22 9.34 11.559.569.289.197.22
First round 12 6.88 9.20 9.186.889.9712.688.44
National Capital Region 2013 Final 6 7.09 7.88 7.289.217.097.1611.15
First round 7 6.25 9.15 11.699.156.256.9611.34
Montréal Open 2013 Final 5 7.58 9.76 11.529.348.4112.277.58
Toronto Open Winter 2013 Final 10 10.43 11.29 10.4310.4312.0211.4711.97
Skewb
Cubing in School Westminster 2025 First round 34 5.44 8.65 11.235.4412.205.489.25
GA Cubers Go Bananas 2024 First round 19 6.07 9.45 10.436.0717.0010.547.38
GA Cuber Jackets Fall 2024 First round 31 5.37 6.93 6.105.378.496.777.92
Anyang Haseyo 2024 First round 33 7.18 8.11 7.187.308.999.098.05
Rubik's WCA World Championship 2023 First round 336 6.87 10.15 8.896.8710.8710.6815.35
Daegu Hot Spring 2023 Final 39 8.21 11.03 15.3013.8010.728.218.57
Busan Summer 2014 Final 7 8.48 11.86 11.6712.298.4811.6112.58
First round 5 7.94 11.12 10.7913.687.948.8814.05
National Capital Region 2014 Final 4 7.81 11.39 7.8110.1611.1914.3112.83
Toronto Open Spring 2014 Final 5 7.18 11.23 11.3110.817.1811.5817.50
Montréal Open 2014 Final 4 8.07 10.15 8.0711.5110.798.1512.35
Square-1
Cube Against Cancer Roswell 2025 First round 26 33.61 37.05 39.5135.4836.1633.6157.36
Cubing in School Westminster 2025 First round 26 23.77 28.86 23.7730.1832.5759.4323.83
GA Cuber Jackets Spring 2025 First round 39 32.12 34.43 34.9934.0142.2232.1234.30
Anyang Haseyo 2024 First round 18 18.90 27.35 37.8918.9026.4827.1428.43
Canadian Open 2013 Final 13 39.40 40.49 41.251:00.9040.0240.1939.40
4x4x4 Blindfolded
GA Cubers Please Banana Quiet 2025 Final 7 DNF DNF DNFDNFDNF
Silent Korea Winter 2024 Final 12 DNF DNF DNFDNFDNF
Silent Korea Spring 2024 Final 8 10:19.00 DNF 10:19.00DNF11:39.00
3x3x3 Multi-Blind
GA Cubers Please Banana Quiet 2025 Final 2 9/11 52:19 9/11 52:19
Silent Korea Winter 2024 Final 9 7/11 52:02 7/11 52:02
Silent Korea Spring 2024 Final 7 10/10 51:37 10/10 51:377/11 1:00:00

History of National Records

Single Average Competition Round Solves
2x2x2 Cube
1.50 National Capital Region 2013 Final
3x3x3 Fewest Moves
25 Montréal Open 2013 Final
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