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Player Profile

Player:

(Eg: Carlsen,Magnus)

Wilken, Justin Barend



FIDE:	FIDE Card
Years:	1996-2020
Number of games:	155
Number of wins:	66
Number of draws:	36
Number of losses:	53
White score:	48/78 (61.54% - Average Elo: 1923.93)
Black score:	36/77 (46.75% - Average Elo: 1935.05)

Rating progression

Games
White wins
White draws
White losses
Black wins
Black draws
Black losses

Top wins

Wilken, Justin Barend (1970) - Barrish, Daniel (2150), South African op, Cape Town (D00) - 2015

Wilken, Justin Barend (1920) - De Abreu, Roberto N (2145), South African op, Durban (C15) - 2017

Wilken, Justin Barend (1970) - Longano, Michael Nicholas (2046), South African op, Cape Town (A40) - 2015

Kaulule Siame, Kela (2147) - Wilken, Justin Barend (1879), Johannesburg PSS op, Johannesburg (D00) - 2016

Mare, Eben (1967) - Wilken, Justin Barend (1986), Centurion Capablanca FM, Centurion (C56) - 2014

Seotloadi, Thinto (1955) - Wilken, Justin Barend (1970), Pretoria FM-B, Pretoria (A89) - 2012

Wilken, Justin Barend - ? (73)

Gluckman, Paul (1/2)

Khumalo, Keith (1/2)

Longano, Michael Nicholas (2/2)

Mwale, Joseph (½/2)

Tshetlo, Tshepo (2/2)

Abrantes, Persson (1/1)

Anwuli, Daniel (0/1)

Avelino, Fernandes (1/1)

Barrish, Daniel (1/1)

Bhawoodien, Mohamed Ozayr (1/1)

Bhawoodien, Shabier Hussain (0/1)

Bouah, Denise (½/1)

Bouah, Lyndon (0/1)

Brown, Shaun C (½/1)

Claassen, Jean Daniel (1/1)

Collen, Benjamin C (½/1)

Cronwright, Shaun (1/1)

De Abreu, Roberto N (1/1)

Duneas, John (0/1)

Erlank, Warrick (0/1)

Erwee, E (1/1)

Geyer, Yolande (1/1)

Gluckman, David (½/1)

Jurrius, Kevin (1/1)

Klaasen, Calvin Jong (0/1)

Langlois, Mendrika (1/1)

Latela, Kananelo (0/1)

Levin, Benny Rl (½/1)

Lewis, Mark MM (½/1)

Liedeman, CL (½/1)

Magagula, Raymond (½/1)

Makoto, Rodwell (0/1)

Mamombe, Kudzanai (0/1)

Masungwini, Michael T (½/1)

Mathibeli, TA (1/1)

Mayimbo, Clement (½/1)

Meintjes, Jacques C (½/1)

Mnguni, Jacob Dumisani (0/1)

Moret, Vincent (0/1)

Moseamedi, Ernest M (0/1)

Mosenya, Ndawana (1/1)

Mphuti, Lebohang (0/1)

Mpya, Tshediso M (1/1)

Oatlhotse, Providence (0/1)

Olebile, Thato (0/1)

Oosthuizen, Michal Jacobus (1/1)

Parodi, Alessandro (1/1)

Phiri, Richmond (0/1)

Pon, Matt (1/1)

Raharijaona, Jose (0/1)

Sanduleac, Vasile (0/1)

Schnabel, Johann Emil (1/1)

Schulz, A (1/1)

Sikwati, Lizo (1/1)

Simpson, Michael1 (1/1)

Sinden, Reginald (1/1)

Solomons, Anzel (1/1)

Steel, Henry Robert (0/1)

Tapera, Uzeni (1/1)

Tavagwisa, Lawrence (1/1)

Tissot van Patot, Anton (1/1)

Tsalicoglou, Jacques T (1/1)

Van der Merwe, Alexander (1/1)

Van Huyssteen, Daniel (1/1)

Van Niekerk, Lourenzo M (1/1)

Venter, Bernard Andre (½/1)

Woolf, Charne (1/1)

Wu, Christopher (0/1)

Xulu, Lindokuhle (1/1)

? - Wilken, Justin Barend (70)

Du Plessis, Heinco (½/2)

Kaulule Siame, Kela (1½/2)

Mbedza, Richard (½/2)

Oberholzer, Francois (½/2)

Odendaal, Frederick (1½/2)

Solomon, Kenny (0/2)

Van der Westhuizen, Willem (½/2)

Abrantes, Persson (0/1)

Andriatsilavo, Randy Haja (½/1)

Basson, Heinrich (1/1)

Bester, Christiaan Lourens (1/1)

Bezuidenhout, Roland Reinhold (1/1)

Bornheim, Craig (½/1)

Botsane, Malefane (1/1)

Cawdery, Daniel (0/1)

Chinner, Henry (1/1)

Chueu, Calvin (1/1)

Davies, Jason S (½/1)

De Abreu, Roberto N (0/1)

Du Toit, Stefan (1/1)

Dykema, Dirkho (1/1)

Essa, Naseem Ahmed (1/1)

February, Jesse Nikki (1/1)

Fraser, Craig J (½/1)

Garach, Nithal (1/1)

Geduld, Jamie M (1/1)

Green, Guy (0/1)

Harika, Dronavalli (0/1)

Hendriksz, Gabriel (0/1)

Khanyile, Wandumuzi Siphephel (1/1)

King, Rohan Henry (0/1)

Klaasen, Calvin Jong (0/1)

Klaver, Cornelis (0/1)

Mabindisa, MAK (1/1)

Mabusela, Johannes Manyedi (0/1)

Mafanya, Kulasande (1/1)

Mahlangu, Sipho (0/1)

Makoto, Rodwell (0/1)

Mare, Eben (1/1)

Masango, Spencer (0/1)

Masungwini, Michael T (0/1)

Meintjes, Jacques C (½/1)

Mhango, Banele (1/1)

Mlahleki, Vusimuzi (0/1)

Mnguni, Jacob Dumisani (0/1)

Mpya, Tshediso M (½/1)

Ponelis, Albert A (½/1)

Puran, Ahdir (1/1)

Rabenandrasana, Liva (0/1)

Ramasindraibe, Girard (0/1)

Salimu, Reuben (½/1)

Schuler, Ashley (0/1)

Sekharume, Lefu (½/1)

Seotloadi, Thinto (1/1)

Smith, Elani (0/1)

Solo, Muzenda (0/1)

Steenkamp, Johan J (½/1)

Stevens, Ryan (1/1)

Tolstikh, Nikolay (0/1)

Van den Heever, Donovan (½/1)

Vermaak, Ashley Christopher (0/1)

Waters, Anre (1/1)

Westermeyer, Andrew (½/1)

Xulu, Lindokuhle (1/1)

Zwakala, Ntando (½/1)

Openings played as White (47)

A45 Queen's Pawn Game (1.d4 Nf6)
Average Elo: 1923.2
Result: 5½/10 = 55%

B08 Pirc, Classical (1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3)
Average Elo: 1828.67
Result: 4/4 = 100%

B20 Sicilian (1.e4 c5)
Average Elo: 1856.5
Result: 2/4 = 50%

D00 Queen's Pawn Game (1.d4 d5)
Average Elo: 1930.75
Result: 1½/4 = 37.5%

D02 Queen's Pawn Game (1.d4 d5 2.Nf3)
Average Elo: 1822
Result: 3/3 = 100%

C48 Four Knights (1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5)
Average Elo: 1861.33
Result: 2/3 = 66.67%

B06 Robatsch (1.e4 g6)
Average Elo: 2314.5
Result: 0/2 = 0%

B01 Scandinavian (1.e4 d5)
Average Elo: 1433
Result: 2/2 = 100%

D05 Queen's Pawn Game (1.d4 d5 2.Nf3 Nf6 3.e3 e6)
Average Elo: 0
Result: ½/2 = 25%

C42 Petrov Defense (1.e4 e5 2.Nf3 Nf6)
Average Elo: 1949
Result: 2/2 = 100%

B34 Sicilian, Accelerated Fianchetto (1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.Nxc6)
Average Elo: 1963
Result: 1/2 = 50%

A40 Queen's Pawn Game (1.d4)
Average Elo: 2046
Result: 1½/2 = 75%

B12 Caro-Kann Defense (1.e4 c6 2.d4)
Average Elo: 2024
Result: 1/2 = 50%

B15 Caro-Kann (1.e4 c6 2.d4 d5 3.Nc3)
Average Elo: 1649
Result: 2/2 = 100%

C13 French (1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7)
Average Elo: 1498
Result: 1½/2 = 75%

A04 Reti Opening (1.Nf3)
Average Elo: 0
Result: 1/1 = 100%

C30 King's Gambit Declined (1.e4 e5 2.f4)
Average Elo: 0
Result: 1/1 = 100%

A48 King's Indian (1.d4 Nf6 2.Nf3 g6)
Average Elo: 0
Result: ½/1 = 50%

C20 King's Pawn Game (1.e4 e5)
Average Elo: 1972
Result: ½/1 = 50%

B95 Sicilian, Najdorf, 6...e6 (1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6)
Average Elo: 0
Result: 0/1 = 0%

E61 King's Indian (1.d4 Nf6 2.c4 g6 3.Nc3)
Average Elo: 0
Result: ½/1 = 50%

B85 Sicilian, Scheveningen, Classical (1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be2 a6 7.O-O Qc7 8.f4 Nc6)
Average Elo: 0
Result: 1/1 = 100%

B80 Sicilian, Scheveningen (1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6)
Average Elo: 2175
Result: 0/1 = 0%

B24 Sicilian, Closed (1.e4 c5 2.Nc3 Nc6 3.g3)
Average Elo: 0
Result: 1/1 = 100%

E18 Queen's Indian, Old Main line, 7.Nc3 (1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.Nc3)
Average Elo: 2021
Result: 0/1 = 0%

A57 Benko Gambit (1.d4 Nf6 2.c4 c5 3.d5 b5)
Average Elo: 2163
Result: 0/1 = 0%

C45 Scotch Game (1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4)
Average Elo: 2003
Result: ½/1 = 50%

B11 Caro-Kann, Two Knights, 3...Bg4 (1.e4 c6 2.Nc3 d5 3.Nf3 Bg4)
Average Elo: 0
Result: 1/1 = 100%

B43 Sicilian, Kan, 5.Nc3 (1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Nc3)
Average Elo: 2166
Result: 0/1 = 0%

C01 French, Exchange (1.e4 e6 2.d4 d5 3.exd5 exd5 4.Nc3 Nf6 5.Bg5)
Average Elo: 2262
Result: ½/1 = 50%

B71 Sicilian, Dragon, Levenfish Variation (1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.f4)
Average Elo: 1897
Result: 1/1 = 100%

B30 Sicilian (1.e4 c5 2.Nf3 Nc6)
Average Elo: 2009
Result: 1/1 = 100%

C00 French Defense (1.e4 e6)
Average Elo: 2103
Result: 0/1 = 0%

C41 Philidor Defense (1.e4 e5 2.Nf3 d6)
Average Elo: 1887
Result: 1/1 = 100%

A80 Dutch (1.d4 f5)
Average Elo: 1885
Result: ½/1 = 50%

C27 Vienna Game (1.e4 e5 2.Nc3 Nf6 3.Bc4 Nxe4)
Average Elo: 2327
Result: 0/1 = 0%

B33 Sicilian (1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4)
Average Elo: 0
Result: 1/1 = 100%

B91 Sicilian, Najdorf, Zagreb (Fianchetto) Variation (1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.g3)
Average Elo: 1622
Result: 0/1 = 0%

A00 Uncommon Opening (1.g4, a3, h3, etc.)
Average Elo: 1751
Result: 1/1 = 100%

B27 Sicilian (1.e4 c5 2.Nf3)
Average Elo: 1616
Result: 1/1 = 100%

E27 Nimzo-Indian, Samisch Variation (1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 O-O)
Average Elo: 2168
Result: 0/1 = 0%

B37 Sicilian, Accelerated Fianchetto (1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Bg7)
Average Elo: 1714
Result: 1/1 = 100%

A41 Queen's Pawn Game (with ...d6) (1.d4 d6)
Average Elo: 2042
Result: 1/1 = 100%

C15 French, Winawer (1.e4 e6 2.d4 d5 3.Nc3 Bb4)
Average Elo: 2145
Result: 1/1 = 100%

E03 Catalan, Open (1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Qa4+ Nbd7 6.Qxc4)
Average Elo: 1912
Result: 0/1 = 0%

C47 Four Knights (1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6)
Average Elo: 2249
Result: ½/1 = 50%

D07 Queen's Gambit Declined, Chigorin Defense (1.d4 d5 2.c4 Nc6)
Average Elo: 1679
Result: 1/1 = 100%

Openings played as Black (60)

B40 Sicilian (1.e4 c5 2.Nf3 e6)
Average Elo: 1848.25
Result: 4½/6 = 75%

D00 Queen's Pawn Game (1.d4 d5)
Average Elo: 1842
Result: 3/3 = 100%

B06 Robatsch (1.e4 g6)
Average Elo: 1750
Result: 2½/3 = 83.33%

A89 Dutch, Leningrad, Main Variation with Nc6 (1.d4 f5 2.c4 Nf6 3.g3 g6 4.Bg2 Bg7 5.Nf3 O-O 6.O-O d6 7.Nc3 Nc6)
Average Elo: 1783.5
Result: 2/3 = 66.67%

B01 Scandinavian (1.e4 d5)
Average Elo: 2254
Result: 1/2 = 50%

B13 Caro-Kann, Exchange (1.e4 c6 2.d4 d5 3.exd5 cxd5)
Average Elo: 0
Result: 0/2 = 0%

C56 Two Knights (1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.O-O Nxe4)
Average Elo: 1897
Result: 2/2 = 100%

B00 Uncommon King's Pawn Opening (1.e4)
Average Elo: 2039
Result: 0/2 = 0%

B15 Caro-Kann (1.e4 c6 2.d4 d5 3.Nc3)
Average Elo: 1614.5
Result: 0/2 = 0%

B84 Sicilian, Scheveningen (1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be2 a6)
Average Elo: 1540
Result: 1½/2 = 75%

A05 Reti Opening (1.Nf3 Nf6)
Average Elo: 2375
Result: 0/1 = 0%

B80 Sicilian, Scheveningen (1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6)
Average Elo: 0
Result: ½/1 = 50%

D58 Queen's Gambit Declined, Tartakower (Makagonov-Bondarevsky) System (1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 7.Bh4 b6)
Average Elo: 0
Result: 1/1 = 100%

B43 Sicilian, Kan, 5.Nc3 (1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Nc3)
Average Elo: 0
Result: 1/1 = 100%

D04 Queen's Pawn Game (1.d4 d5 2.Nf3 Nf6 3.e3)
Average Elo: 0
Result: 0/1 = 0%

D17 Queen's Gambit Declined Slav (1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5)
Average Elo: 2353
Result: 0/1 = 0%

D35 Queen's Gambit Declined (1.d4 d5 2.c4 e6 3.Nc3 Nf6)
Average Elo: 0
Result: 1/1 = 100%

C90 Ruy Lopez, Closed (1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d6)
Average Elo: 2277
Result: 0/1 = 0%

C40 King's Knight Opening (1.e4 e5 2.Nf3)
Average Elo: 0
Result: 1/1 = 100%

B21 Sicilian, 2.f4 and 2.d4 (1.e4 c5 2.f4)
Average Elo: 0
Result: ½/1 = 50%

C45 Scotch Game (1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4)
Average Elo: 0
Result: ½/1 = 50%

A07 King's Indian Attack (1.Nf3 d5 2.g3)
Average Elo: 2090
Result: ½/1 = 50%

D55 Queen's Gambit Declined (1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3)
Average Elo: 2079
Result: 0/1 = 0%

A81 Dutch (1.d4 f5 2.g3)
Average Elo: 2520
Result: 0/1 = 0%

E12 Queen's Indian (1.d4 Nf6 2.c4 e6 3.Nf3 b6)
Average Elo: 0
Result: 1/1 = 100%

E33 Nimzo-Indian, Classical (1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 Nc6)
Average Elo: 2026
Result: 0/1 = 0%

D68 Queen's Gambit Declined, Orthodox Defense, Classical (1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 dxc4)
Average Elo: 2156
Result: 0/1 = 0%

B08 Pirc, Classical (1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3)
Average Elo: 1986
Result: ½/1 = 50%

D40 Queen's Gambit Declined, Semi-Tarrasch (1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5)
Average Elo: 1874
Result: 1/1 = 100%

B81 Sicilian, Scheveningen, Keres Attack (1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.g4)
Average Elo: 2345
Result: 0/1 = 0%

A25 English (1.c4 e5 2.Nc3 Nc6)
Average Elo: 0
Result: 0/1 = 0%

E04 Catalan, Open, 5.Nf3 (1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Nf3)
Average Elo: 0
Result: 0/1 = 0%

A85 Dutch, with c4 & Nc3 (1.d4 f5 2.c4 Nf6 3.Nc3)
Average Elo: 2045
Result: ½/1 = 50%

A14 English (1.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 Be7 5.O-O)
Average Elo: 1953
Result: ½/1 = 50%

E01 Catalan, Closed (1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2)
Average Elo: 1931
Result: 0/1 = 0%

E14 Queen's Indian (1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.e3)
Average Elo: 2041
Result: ½/1 = 50%

B24 Sicilian, Closed (1.e4 c5 2.Nc3 Nc6 3.g3)
Average Elo: 1821
Result: 0/1 = 0%

D25 Queen's Gambit Accepted (1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3)
Average Elo: 2078
Result: 0/1 = 0%

C70 Ruy Lopez (1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4)
Average Elo: 2163
Result: 0/1 = 0%

A45 Queen's Pawn Game (1.d4 Nf6)
Average Elo: 1438
Result: 1/1 = 100%

D45 Queen's Gambit Declined Semi-Slav (1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c6 5.e3)
Average Elo: 1768
Result: 1/1 = 100%

C47 Four Knights (1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6)
Average Elo: 1391
Result: ½/1 = 50%

A62 Benoni, Fianchetto Variation (1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.g3 Bg7 8.Bg2 O-O)
Average Elo: 2060
Result: 0/1 = 0%

C10 French (1.e4 e6 2.d4 d5 3.Nc3)
Average Elo: 2066
Result: ½/1 = 50%

A20 English (1.c4 e5)
Average Elo: 2406
Result: 0/1 = 0%

A80 Dutch (1.d4 f5)
Average Elo: 1775
Result: 1/1 = 100%

B25 Sicilian, Closed (1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6)
Average Elo: 1626
Result: 0/1 = 0%

B70 Sicilian, Dragon Variation (1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6)
Average Elo: 1966
Result: ½/1 = 50%

A55 Old Indian, Main line (1.d4 Nf6 2.c4 d6 3.Nc3 e5 4.Nf3 Nbd7 5.e4)
Average Elo: 2035
Result: ½/1 = 50%

B22 Sicilian, Alapin (1.e4 c5 2.c3)
Average Elo: 1522
Result: 1/1 = 100%

B50 Sicilian (1.e4 c5 2.Nf3 d6)
Average Elo: 1663
Result: 1/1 = 100%

D02 Queen's Pawn Game (1.d4 d5 2.Nf3)
Average Elo: 2203
Result: 0/1 = 0%

B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack (1.e4 c5 2.Nf3 d6 3.Bb5+)
Average Elo: 2003
Result: ½/1 = 50%

A00 Uncommon Opening (1.g4, a3, h3, etc.)
Average Elo: 1984
Result: 0/1 = 0%

C48 Four Knights (1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5)
Average Elo: 1957
Result: 0/1 = 0%

A12 English with b3 (1.c4 c6 2.Nf3 d5 3.b3)
Average Elo: 2191
Result: 0/1 = 0%

A26 English (1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6)
Average Elo: 1722
Result: 1/1 = 100%

B38 Sicilian, Accelerated Fianchetto, Maroczy Bind, 6.Be3 (1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Bg7 6.Be3)
Average Elo: 1679
Result: 0/1 = 0%

A86 Dutch (1.d4 f5 2.c4 Nf6 3.g3)
Average Elo: 2175
Result: ½/1 = 50%

A40 Queen's Pawn Game (1.d4)
Average Elo: 1911
Result: ½/1 = 50%