Player profile
Katz, Alexander
Dossier
138 of 140 games analyzed.
Accuracy: 90.2%
Opened e4: 54/59Opened c4: 2/59Opened c3: 1/59Opened Nf3: 1/59Opened g3: 1/59
Castled kingside: 93Same-side castling: 86Castled queenside: 11Did not castle: 11Opposite-side castling: 11
Played in the center: 44Played on the queenside: 29Fianchettoed queenside: 28Fianchettoed kingside: 26Played on the kingside: 21
Active pieces: 80Initiated exchanges: 76Sacrificed material: 73Space advantage: 64Backward pawn: 60Kept the bishop pair: 59Isolated pawn: 55Missed tactics: 32Avoided exchanges: 22Played gambits: 16
Openings
Click "+" to add that group to the games list below. Multiple groups can be added at once.
As White 60 games 26W 19D 15L
Sicilian Defense 21 games 10W 6D 5L
Taimanov Variation 4 games 2W 1D 1L
Bastrikov Variation
3 games
1W
1D
1L
Bastrikov Variation, English Attack
1 game
1W
0D
0L
Richter-Rauzer Variation 3 games 0W 2D 1L
Modern Variation
1 game
0W
1D
0L
Neo-Modern Variation
1 game
0W
0D
1L
Neo-Modern Variation, Early Deviations
1 game
0W
1D
0L
Accelerated Dragon 3 games 2W 1D 0L
Maróczy Bind
2 games
1W
1D
0L
Modern Bc4 Variation
1 game
1W
0D
0L
Najdorf Variation 3 games 0W 2D 1L
English Attack
2 games
0W
1D
1L
(unspecified)
1 game
0W
1D
0L
Moscow Variation 2 games 2W 0D 0L
(unspecified)
2 games
2W
0D
0L
Nyezhmetdinov-Rossolimo Attack 2 games 2W 0D 0L
(unspecified)
1 game
1W
0D
0L
Fianchetto Variation
1 game
1W
0D
0L
Kan Variation 1 game 0W 0D 1L
Polugaevsky Variation
1 game
0W
0D
1L
Lasker-Pelikan Variation 1 game 0W 0D 1L
Sveshnikov Variation, Chelyabinsk Variation
1 game
0W
0D
1L
Dragon Variation 1 game 1W 0D 0L
Yugoslav Attack, Modern Line
1 game
1W
0D
0L
Closed 1 game 1W 0D 0L
Anti-Sveshnikov Variation, with Nf6
1 game
1W
0D
0L
Italian Game 10 games 4W 2D 4L
Classical Variation 8 games 4W 2D 2L
Giuoco Pianissimo
8 games
4W
2D
2L
Two Knights Defense 2 games 0W 0D 2L
Modern Bishop's Opening
2 games
0W
0D
2L
Ruy Lopez 9 games 2W 4D 3L
Morphy Defense 5 games 1W 2D 2L
Modern Steinitz Defense
1 game
1W
0D
0L
Fianchetto Defense Deferred
1 game
0W
0D
1L
Schliemann Defense Deferred
1 game
0W
0D
1L
Cozio Defense
1 game
0W
1D
0L
Steinitz Deferred
1 game
0W
1D
0L
Closed 2 games 1W 0D 1L
Smyslov Defense
1 game
0W
0D
1L
(unspecified)
1 game
1W
0D
0L
Open Berlin Defense 1 game 0W 1D 0L
Showalter Variation
1 game
0W
1D
0L
Berlin Defense 1 game 0W 1D 0L
Anti-Berlin Variation
1 game
0W
1D
0L
Caro-Kann Defense 3 games 1W 0D 2L
Advance Variation 3 games 1W 0D 2L
(unspecified)
2 games
1W
0D
1L
Short Variation
1 game
0W
0D
1L
Four Knights Game 2 games 0W 2D 0L
Scotch Variation Accepted 2 games 0W 2D 0L
Main Line
2 games
0W
2D
0L
French Defense 2 games 0W 2D 0L
Classical Variation 1 game 0W 1D 0L
Burn Variation
1 game
0W
1D
0L
Exchange Variation 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Alekhine Defense 2 games 1W 0D 1L
Exchange Variation 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
(unspecified) 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
English Opening 2 games 1W 1D 0L
King's English Variation 2 games 1W 1D 0L
Two Knights Variation, Keres Variation
1 game
0W
1D
0L
Three Knights System
1 game
1W
0D
0L
Philidor Defense 1 game 0W 1D 0L
Lion Variation 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Scotch Game 1 game 1W 0D 0L
Scotch Gambit 1 game 1W 0D 0L
Advance Variation
1 game
1W
0D
0L
Saragossa Opening 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Scandinavian Defense 1 game 1W 0D 0L
Valencian Variation 1 game 1W 0D 0L
Main Line
1 game
1W
0D
0L
Pirc Defense 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Zukertort Opening 1 game 1W 0D 0L
Kingside Fianchetto 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Petrov's Defense 1 game 1W 0D 0L
Nimzowitsch Attack 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Nimzowitsch Defense 1 game 1W 0D 0L
Williams Variation 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Hungarian Opening 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
As Black 57 games 20W 24D 13L
Pirc Defense 9 games 4W 3D 2L
Classical Variation 3 games 2W 1D 0L
Quiet System
2 games
1W
1D
0L
(unspecified)
1 game
1W
0D
0L
(unspecified) 3 games 0W 1D 2L
(unspecified)
3 games
0W
1D
2L
Byrne Variation 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
150 Attack 1 game 1W 0D 0L
Sveshnikov-Jansa Attack
1 game
1W
0D
0L
Austrian Attack 1 game 0W 1D 0L
Weiss Variation
1 game
0W
1D
0L
Indian Defense 6 games 2W 3D 1L
Knights Variation 2 games 0W 1D 1L
(unspecified)
2 games
0W
1D
1L
London System 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Dzindzi-Indian Defense 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Accelerated London System 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
(unspecified) 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
English Opening 5 games 1W 2D 2L
Agincourt Defense 2 games 1W 0D 1L
Catalan Defense Accepted
2 games
1W
0D
1L
King's English Variation 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Anglo-Indian Defense 1 game 0W 1D 0L
King's Knight Variation
1 game
0W
1D
0L
Mikenas-Carls Variation 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Italian Game 4 games 0W 4D 0L
Classical Variation 2 games 0W 2D 0L
Giuoco Pianissimo
2 games
0W
2D
0L
Two Knights Defense 2 games 0W 2D 0L
Modern Bishop's Opening
1 game
0W
1D
0L
Polerio Defense, Bishop Check Line
1 game
0W
1D
0L
Ruy Lopez 4 games 0W 3D 1L
Morphy Defense 4 games 0W 3D 1L
Neo-Arkhangelsk Variation
3 games
0W
2D
1L
Møller Variation
1 game
0W
1D
0L
Queen's Gambit Declined 3 games 1W 1D 1L
Three Knights Variation 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Cambridge Springs Defense 1 game 0W 1D 0L
Rubinstein Variation
1 game
0W
1D
0L
Orthodox Defense 1 game 1W 0D 0L
Rubinstein Variation
1 game
1W
0D
0L
Nimzo-Indian Defense 3 games 2W 0D 1L
Kmoch Variation 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Sämisch Variation 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
St. Petersburg Variation 1 game 1W 0D 0L
Fischer Variation
1 game
1W
0D
0L
Tarrasch Defense 3 games 0W 3D 0L
Classical Variation 3 games 0W 3D 0L
Réti Variation
1 game
0W
1D
0L
Advance Variation
1 game
0W
1D
0L
(unspecified)
1 game
0W
1D
0L
Queen's Pawn Game 3 games 2W 1D 0L
London System 1 game 1W 0D 0L
with e6
1 game
1W
0D
0L
(unspecified) 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Colle System 1 game 1W 0D 0L
Anti-Colle
1 game
1W
0D
0L
Catalan Opening 2 games 0W 1D 1L
Open Defense 2 games 0W 1D 1L
Classical Line
2 games
0W
1D
1L
Rapport-Jobava System 2 games 2W 0D 0L
(unspecified) 2 games 2W 0D 0L
(unspecified)
2 games
2W
0D
0L
Sicilian Defense 2 games 1W 0D 1L
Nyezhmetdinov-Rossolimo Attack 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Dragon Variation 1 game 1W 0D 0L
Yugoslav Attack
1 game
1W
0D
0L
Caro-Kann Defense 2 games 1W 1D 0L
Two Knights Attack 1 game 0W 1D 0L
Mindeno Variation, Exchange Line
1 game
0W
1D
0L
Breyer Variation 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Zukertort Opening 1 game 0W 0D 1L
Nimzo-Larsen Variation 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
French Defense 1 game 0W 1D 0L
Tarrasch Variation 1 game 0W 1D 0L
Chistyakov Defense
1 game
0W
1D
0L
Bird Opening 1 game 0W 0D 1L
Dutch Variation 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Slav Defense 1 game 0W 0D 1L
Quiet Variation 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Petrov's Defense 1 game 0W 1D 0L
Modern Attack 1 game 0W 1D 0L
Center Variation
1 game
0W
1D
0L
Trompowsky Attack 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
King's Indian Attack 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Van Geet Opening 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Nimzowitsch Defense 1 game 1W 0D 0L
Williams Variation 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Blunders Top 4 of 525
This player's costliest moves in analyzed games. Can you find the winning move?
Games Showing all 140 games
| Date | Event | Round | Color | Opponent | Result | Accuracy % | First moves |
|---|---|---|---|---|---|---|---|
| 2026.04.08 | Round 3: Bogner, Sebastian - Katz, Alexander | 3.10 | 2026.04.08 Bogner, Sebastian (4692055) (2550) | 0 | 90.60% | 1. d4 Nf6 2. c4 e6 3. Nf3 d5 | |
| 2026.04.06 | X Open Semana Santa 2026 - Grupo A | 9.12 | 2026.04.06 Sivuk, Vitaly (14116502) (2522) | ½ | 83.90% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | |
| 2026.04.05 | X Open Semana Santa 2026 - Grupo A | 8.31 | 2026.04.05 Safarov, Deniel (13619802) (2256) | 1 | 96.70% | 1. Nf3 Nf6 2. c4 e6 3. g3 d5 | |
| 2026.04.04 | X Open Semana Santa 2026 - Grupo A | 6.13 | 2026.04.04 Piorun, Kacper (1130420) (2536) | 0 | 91.10% | 1. c4 Nf6 2. Nf3 e6 3. g3 d5 | |
| 2026.04.03 | X Open Semana Santa 2026 - Grupo A | 5.13 | 2026.04.03 Chen, Qi b (8614733) (2484) | ½ | 93.60% | 1. e4 d6 2. d4 Nf6 3. Nc3 e5 | |
| 2026.04.03 | X Open Semana Santa 2026 - Grupo A | 4.4 | 2026.04.03 Fedorchuk, Sergey A. (14102536) (2585) | ½ | 96.10% | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 | |
| 2026.04.02 | X Open Semana Santa 2026 - Grupo A | 3.32 | 2026.04.02 Sala Esquiva, Miguel (54766745) (2117) | 1 | 98.00% | 1. e4 c5 2. Nf3 Nc6 3. Nc3 g6 | |
| 2025.10.12 | Round 8: Katz, Alexander - Adewumi, Tanitoluwa | 8.3 | 2025.10.12 Adewumi, Tanitoluwa (30966396) (2467) | ½ | 86.30% | 1. e4 c5 2. Nf3 e6 3. d4 cxd4 | |
| 2025.10.12 | Round 7: Brodsky, David - Katz, Alexander | 7.4 | 2025.10.12 Brodsky, David (2073250) (2469) | ½ | 87.60% | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 | |
| 2025.10.12 | Round 6: Katz, Alexander - Zhu, Linxi | 6.4 | 2025.10.12 Zhu, Linxi (39900428) (2189) | 1 | 84.40% | 1. e4 c5 2. Nf3 d6 3. Bb5+ Nc6 | |
| 2025.10.12 | Round 5: Katz, Alexander - Kozlek, Tommy | 5.8 | 2025.10.12 Kozlek, Tommy (39918572) (1926) | 1 | 93.40% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 | |
| 2025.10.12 | Round 4: Nasta, Kiren Vivek - Katz, Alexander | 4.5 | 2025.10.12 Nasta, Kiren Vivek (30943612) (2107) | ½ | 91.60% | 1. e4 d6 2. d4 Nf6 3. Nc3 g6 | |
| 2025.10.12 | Round 2: Smith, Daniel - Katz, Alexander | 2.7 | 2025.10.12 Smith, Daniel (2024195) | 1 | 94.30% | 1. d4 d6 2. Nc3 Nf6 3. e4 g6 | |
| 2025.10.12 | Round 1: Katz, Alexander - Lee, Rohan | 1.9 | 2025.10.12 Lee, Rohan (39927865) (2004) | 1 | 85.60% | 1. e4 c5 2. Nf3 Nc6 3. Bb5 e6 | |
| 2025.10.12 | Round 7: George, Kevin - Katz, Alexander | 7.4 | 2025.10.12 George, Kevin (10669515) (2257) | ½ | 97.70% | 1. d4 Nf6 2. c4 e6 3. g3 d5 | |
| 2025.10.11 | Round 6: Katz, Alexander - Nasta, Kiren Vivek | 6.3 | 2025.10.11 Nasta, Kiren Vivek (30943612) (1889) | 0 | 88.80% | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 | |
| 2025.10.11 | Round 5: Dixit, Arun - Katz, Alexander | 5.4 | 2025.10.11 Dixit, Arun (30937671) | 1 | 80.90% | 1. e4 d6 2. d4 Nf6 3. Nc3 g6 | |
| 2025.10.11 | Round 2: Katz, Alexander - Ulloa Centeno, Leandro Nicolas | 2.6 | 2025.10.11 Ulloa Centeno, Leandro Nicolas (3636372) | 1 | 96.00% | 1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 | |
| 2025.10.11 | Round 1: Smith, Daniel - Katz, Alexander | 1.7 | 2025.10.11 Smith, Daniel (2024195) (2022) | 1 | 86.90% | 1. d4 Nf6 2. Nc3 d5 3. Bf4 g6 | |
| 2025.10.09 | Round 9: Bortnyk, Mykola - Katz, Alexander | 9.1 | 2025.10.09 Bortnyk, Mykola (14120836) (2651) | 0 | 87.60% | 1. e4 d6 2. d4 Nf6 3. Nc3 g6 | |
| 2025.10.09 | Round 3: Katz, Alexander - Chasin, Nico | 3.1 | 2025.10.09 Chasin, Nico (30908477) (2443) | 0 | 79.70% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | |
| 2025.10.09 | Round 4: Katz, Alexander - Bortnyk, Mykola | 4.1 | 2025.10.09 Bortnyk, Mykola (14120836) (2517) | 0 | 85.70% | 1. e4 c5 2. Nf3 e6 3. d4 cxd4 | |
| 2025.10.09 | Round 3: Chasin, Nico - Katz, Alexander | 3.1 | 2025.10.09 Chasin, Nico (30908477) (2414) | 1 | 84.10% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2025.07.13 | Round 9: Katz, Alexander - Nagy, Gabor | 9.4 | 2025.07.13 Nagy, Gabor (737119) (2463) | ½ | 98.60% | 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 | |
| 2025.07.12 | Round 8: Stearman, Josiah - Katz, Alexander | 8.2 | 2025.07.12 Stearman, Josiah (2062496) (2451) | ½ | 89.50% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 | |
| 2025.07.12 | Round 7: Katz, Alexander - Sun, Ryan | 7.5 | 2025.07.12 Sun, Ryan (30965659) (2346) | 1 | 91.80% | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 | |
| 2025.07.10 | Round 5: Sheehan, Ethan - Katz, Alexander | 5.5 | 2025.07.10 Sheehan, Ethan (30943965) (2366) | 1 | 96.40% | 1. d4 Nf6 2. Nf3 e6 3. Bf4 c5 | |
| 2025.07.10 | Round 4: Katz, Alexander - Gauri, Shankar | 4.2 | 2025.07.10 Gauri, Shankar (5041350) (2371) | ½ | 93.50% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 | |
| 2025.07.09 | Round 3: Kaplan, Avi Harrison - Katz, Alexander | 3.4 | 2025.07.09 Kaplan, Avi Harrison (30934559) (2304) | 0 | 86.50% | 1. Nf3 Nf6 2. b3 d5 3. Bb2 Bf5 | |
| 2025.07.09 | Round 2: Katz, Alexander - Plat, Vojtech | 2.3 | 2025.07.09 Plat, Vojtech (325740) (2487) | 0 | 70.90% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 | |
| 2025.07.08 | Round 1: Cruz, Cristhian - Katz, Alexander | 1.3 | 2025.07.08 Cruz, Cristhian (3801969) (2477) | 0 | 89.00% | 1. c4 e5 2. g3 d6 3. Bg2 f5 | |
| 2025.07.07 | Round 6: Lin, Bryan Enming - Katz, Alexander | 6.1 | 2025.07.07 Lin, Bryan Enming (30987121) (2302) | ½ | 99.30% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 | |
| 2025.05.26 | 12th Cherry Blossom Classic | 9.5 | 2025.05.26 Brady, Tyson (30970369) (2164) | ½ | 93.50% | 1. e4 e6 2. d4 d5 3. Nd2 c5 | |
| 2025.05.26 | 12th Cherry Blossom Classic | 8.6 | 2025.05.26 Wang, Kevin (30996635) (2073) | ½ | 82.10% | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 | |
| 2025.05.25 | 12th Cherry Blossom Classic | 7.4 | 2025.05.25 Popilski, Gil (2809060) (2445) | ½ | 94.90% | 1. e4 e6 2. d4 d5 3. Nc3 Nf6 | |
| 2025.05.25 | 12th Cherry Blossom Classic | 6.7 | 2025.05.25 Samuelson, Andrew (2020580) (2088) | 1 | 96.10% | 1. e4 c5 2. Nf3 d6 3. Bb5+ Nd7 | |
| 2025.05.24 | 12th Cherry Blossom Classic | 5.3 | 2025.05.24 Stremavicius, Titas (12804444) (2544) | 0 | 91.20% | 1. d4 Nf6 2. Nf3 e6 3. g3 b5 | |
| 2025.05.24 | 12th Cherry Blossom Classic | 4.6 | 2025.05.24 Semenov, Valeri (14101319) (2155) | 1 | 97.10% | 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 | |
| 2025.05.23 | 12th Cherry Blossom Classic | 3.7 | 2025.05.23 Diao, Matthew Guo (30970547) (2115) | ½ | - | 1. d4 Nf6 2. c4 e6 3. Nf3 a6 | |
| 2025.05.23 | 12th Cherry Blossom Classic | 2.6 | 2025.05.23 Slade, Theodore (426547) (2113) | ½ | 92.40% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 | |
| 2025.05.22 | 12th Cherry Blossom Classic | 1.7 | 2025.05.22 Li, Sophie (30981107) (2029) | 1 | 94.00% | 1. e4 d6 2. d4 Nf6 3. Nc3 g6 | |
| 2025.04.27 | Round 9: Katz, Alexander - Macias Pino, Diego | 9.20 | 2025.04.27 Macias Pino, Diego (24529133) (2510) | 0 | 84.40% | 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 | |
| 2025.04.25 | Round 8: Katz, Alexander - Royal, Shreyas | 8.4 | 2025.04.25 Royal, Shreyas (448869) (2394) | ½ | 82.50% | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 | |
| 2025.04.25 | Round 7: Bharath Subramaniyam H - Katz, Alexander | 7.2 | 2025.04.25 Bharath Subramaniyam H (46634827) (2520) | 0 | 80.80% | 1. e4 c5 2. Nf3 Nc6 3. Bb5 d6 | |
| 2025.04.25 | Round 6: Katz, Alexander - Zanan, Evgeny | 6.3 | 2025.04.25 Zanan, Evgeny (24101940) (2408) | 1 | 88.10% | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 | |
| 2025.04.24 | Round 4: Katz, Alexander - Dragnev, Valentin | 4.2 | 2025.04.24 Dragnev, Valentin (1634852) (2494) | ½ | 87.20% | 1. c3 e5 2. c4 Nf6 3. a3 c5 | |
| 2025.04.23 | Round 2: Ivanchuk, Vasyl - Katz, Alexander | 2.7 | 2025.04.23 Ivanchuk, Vasyl (14100010) (2604) | 0 | 91.80% | 1. f4 d5 2. Nf3 c5 3. e3 Nc6 | |
| 2025.01.20 | Round 9: Katz, Alexander - Mardov, Dimitar | 9.1 | 2025.01.20 Mardov, Dimitar (30919495) (2504) | ½ | 99.50% | 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 | |
| 2025.01.20 | Round 8: Shlyakhtenko, Robert - Katz, Alexander | 8.5 | 2025.01.20 Shlyakhtenko, Robert (30936934) (2429) | 0 | 79.80% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2025.01.19 | Round 7: Katz, Alexander - Chasin, Nico | 7.2 | 2025.01.19 Chasin, Nico (30908477) (2414) | 0 | 80.40% | 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 | |
| 2025.01.19 | Round 6: Schnaider, Ilan - Katz, Alexander | 6.4 | 2025.01.19 Schnaider, Ilan (169013) (2392) | ½ | 97.40% | 1. e4 c6 2. Nc3 d5 3. Nf3 Bg4 | |
| 2025.01.18 | Round 5: Katz, Alexander - Kevlishvili, Robby | 5.3 | 2025.01.18 Kevlishvili, Robby (1040634) (2559) | 0 | 89.00% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 | |
| 2025.01.18 | Round 4: Cordova, Emilio - Katz, Alexander | 4.3 | 2025.01.18 Cordova, Emilio (3801497) (2533) | ½ | 85.70% | 1. Nf3 Nf6 2. c4 e6 3. Nc3 d5 | |
| 2025.01.17 | Round 3: Katz, Alexander - Ostrovskiy, Aleksandr | 3.4 | 2025.01.17 Ostrovskiy, Aleksandr (2034239) (2409) | 1 | 86.20% | 1. e4 c6 2. d4 d5 3. e5 Bf5 | |
| 2025.01.17 | Round 2: Escobar Forero, Alder - Katz, Alexander | 2.2 | 2025.01.17 Escobar Forero, Alder (4400801) (2420) | 1 | 99.20% | 1. e4 c6 2. d3 d5 3. Nd2 e5 | |
| 2025.01.16 | Round 1: Katz, Alexander - Park, Evan | 1.5 | 2025.01.16 Park, Evan (30931142) (2406) | 0 | 88.70% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 | |
| 2024.12.29 | 34th Annual North American Open | 6.18 | 2024.12.29 Yim, Sung Ho (2062020) (2309) | 0 | 86.70% | 1. d4 d5 2. c4 c6 3. Nf3 Nf6 | |
| 2024.12.28 | Round 5: Katz, Alexander - Quesada Perez, Yasser | 5.4 | 2024.12.28 Quesada Perez, Yasser (3509362) (2577) | 0 | 90.30% | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 | |
| 2024.12.27 | Round 4: Atwell, Rose - Katz, Alexander | 4.6 | 2024.12.27 Atwell, Rose (30951011) (2169) | ½ | 94.10% | 1. d4 Nf6 2. c4 e6 3. g3 d5 | |
| 2024.12.27 | 34th Annual North American Open | 3.16 | 2024.12.27 Gutla, Aryan (30945968) (2271) | 1 | 92.20% | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 | |
| 2024.12.27 | 34th Annual North American Open | 2.15 | 2024.12.27 Lee, Megan (2029618) (2294) | ½ | 96.10% | 1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 | |
| 2024.10.13 | Round 13: Hoffmann, Asa - Katz, Alexander | 13.7 | 2024.10.13 Hoffmann, Asa (2001470) (2185) | 1 | 90.10% | 1. d4 Nf6 2. Bg5 d5 3. e3 e6 | |
| 2024.10.13 | Round 12: Katz, Alexander - Chasin, Nico | 12.5 | 2024.10.13 Chasin, Nico (30908477) (2416) | 0 | 86.40% | 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 | |
| 2024.10.13 | Round 11: Chasin, Nico - Katz, Alexander | 11.5 | 2024.10.13 Chasin, Nico (30908477) (2416) | ½ | 76.40% | 1. c4 Nf6 2. Nc3 e6 3. e4 d5 | |
| 2024.10.13 | Round 10: Katz, Alexander - Morris-Suzuki, Alan H | 10.6 | 2024.10.13 Morris-Suzuki, Alan H (30933218) (1863) | ½ | 91.10% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | |
| 2024.10.13 | Round 9: Morris-Suzuki, Alan H - Katz, Alexander | 9.6 | 2024.10.13 Morris-Suzuki, Alan H (30933218) (1863) | 1 | 96.70% | 1. Nf3 Nf6 2. g3 d5 3. Bg2 Bf5 | |
| 2024.10.13 | Round 8: Bortnyk, Mykola - Katz, Alexander | 8.3 | 2024.10.13 Bortnyk, Mykola (14120836) (2405) | 0 | 77.80% | 1. e4 d6 2. d4 Nf6 3. Nc3 g6 | |
| 2024.10.13 | Round 7: Katz, Alexander - Bortnyk, Mykola | 7.3 | 2024.10.13 Bortnyk, Mykola (14120836) (2405) | 0 | 76.50% | 1. e4 Nf6 2. e5 Nd5 3. d4 d6 | |
| 2024.10.13 | Round 6: Katz, Alexander - Gaw, Chloe | 6.5 | 2024.10.13 Gaw, Chloe (30966892) (2004) | 1 | 93.90% | 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd8 | |
| 2024.10.13 | Round 5: Gaw, Chloe - Katz, Alexander | 5.5 | 2024.10.13 Gaw, Chloe (30966892) (2004) | 1 | 93.90% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2024.10.13 | Round 4: Katz, Alexander - Meduri, Aakaash | 4.5 | 2024.10.13 Meduri, Aakaash (2032252) (2049) | 1 | 62.80% | 1. e4 d6 2. d4 Nf6 3. Nc3 e5 | |
| 2024.10.13 | Round 3: Meduri, Aakaash - Katz, Alexander | 3.5 | 2024.10.13 Meduri, Aakaash (2032252) (2049) | ½ | 85.30% | 1. d4 Nf6 2. Bf4 d6 3. e3 g6 | |
| 2024.10.13 | Round 2: Weisz, Bryan - Katz, Alexander | 2.5 | 2024.10.13 Weisz, Bryan (30934133) (2069) | ½ | 96.80% | 1. Nf3 Nf6 2. g3 e6 3. Bg2 d5 | |
| 2024.10.13 | Round 1: Katz, Alexander - Weisz, Bryan | 1.5 | 2024.10.13 Weisz, Bryan (30934133) (2069) | 1 | 94.60% | 1. Nf3 g6 2. e4 c6 3. d4 d5 | |
| 2024.10.12 | Round 7: Katz, Alexander - Hardaway, Brewington | 7.1 | 2024.10.12 Hardaway, Brewington (30941849) (2489) | ½ | 81.50% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 | |
| 2024.10.12 | Round 6: George Micheal, Kevin - Katz, Alexander | 6.1 | 2024.10.12 George, Kevin (10669515) (2267) | ½ | 95.40% | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 | |
| 2024.10.12 | Round 5: Tang, Andrew - Katz, Alexander | 5.1 | 2024.10.12 Tang, Andrew (2059630) (2527) | 1 | 90.50% | 1. d4 Nf6 2. Nf3 e6 3. Bf4 d5 | |
| 2024.10.12 | Round 4: Katz, Alexander - Bortnyk, Mykola | 4.1 | 2024.10.12 Bortnyk, Mykola (14120836) (2405) | 1 | 81.40% | 1. e4 Nf6 2. e5 Nd5 3. d4 d6 | |
| 2024.10.12 | Round 3: Katz, Alexander - Chasin, Nico | 3.2 | 2024.10.12 Chasin, Nico (30908477) (2416) | 1 | 96.10% | 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 | |
| 2024.10.12 | Round 2: Bonin, Jay - Katz, Alexander | 2.3 | 2024.10.12 Bonin, Jay (2000644) (2131) | 1 | 95.90% | 1. Nc3 d5 2. e4 d4 3. Nce2 e5 | |
| 2024.10.12 | Round 1: Katz, Alexander - Chen, Alex | 1.5 | 2024.10.12 Chen, Alex (30929652) (2006) | 1 | 98.00% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | |
| 2024.03.21 | Reykjavik Open 2024 | 9.11 | 2024.03.21 Yilmazyerli, Mert (6305962) (2526) | ½ | 93.70% | 1. d4 Nf6 2. c4 e6 3. Nf3 d5 | |
| 2024.03.20 | Reykjavik Open 2024 | 8.25 | 2024.03.20 Li, Harry (430145) (2107) | 1 | 95.70% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 | |
| 2024.03.19 | Reykjavik Open 2024 | 7.28 | 2024.03.19 Ptacnikova, Lenka (305650) (2067) | 1 | 94.50% | 1. d4 Nf6 2. Nc3 d5 3. Bf4 g6 | |
| 2024.03.18 | Reykjavik Open 2024 | 6.4 | 2024.03.18 Pultinevicius, Paulius (12809390) (2575) | 0 | 88.20% | 1. e4 c6 2. d4 d5 3. e5 Bf5 | |
| 2024.03.18 | Reykjavik Open 2024 | 5.23 | 2024.03.18 Pourkashiyan, Atousa (12502014) (2270) | 1 | 98.40% | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 | |
| 2024.03.17 | Reykjavik Open 2024 | 4.37 | 2024.03.17 Gikas, Andreas Basilius (4623509) (2104) | 1 | 94.40% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | |
| 2024.03.16 | Reykjavik Open 2024 | 3.2 | 2024.03.16 Sanal, Vahap (6300545) (2558) | 0 | 87.60% | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 | |
| 2024.03.16 | Reykjavik Open 2024 | 2.31 | 2024.03.16 Mai, Alexander Oliver (2313391) (2160) | 1 | 94.70% | 1. e4 Nc6 2. Nf3 d6 3. d4 Nf6 | |
| 2024.03.15 | Reykjavik Open 2024 | 1.41 | 2024.03.15 Kolka, David (2308010) (2030) | 1 | 93.70% | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 | |
| 2026.06.17 | Round 3: Alexander Katz - Luc William Crim Hoffman | 3.2 | 2026.06.17 Luc William Crim Hoffman | ½ | 93.80% | 1. c4 e5 2. Nc3 Nf6 3. g3 c6 | |
| 2026.06.17 | Round 2: Shvarts, Tim - Alexander Katz | 2.2 | 2026.06.17 Shvarts, Tim (39927830) (2018) | 1 | 90.80% | 1. d4 Nf6 2. c4 e6 3. Nf3 d5 | |
| 2026.06.16 | Round 1: Alexander Katz - Arthur, Brian | 1.2 | 2026.06.16 Arthur, Brian (2090830) (1923) | 1 | 78.90% | 1. e4 c5 2. Nf3 Nc6 3. Nc3 e5 | |
| 2026.06.15 | Round 4: Adewumi, Tanitoluwa - Alexander Katz | 4.1 | 2026.06.15 Adewumi, Tanitoluwa (30966396) (2471) | 1 | 95.30% | 1. e4 d6 2. d4 Nf6 3. Nc3 g6 | |
| 2026.05.27 | Round 3: Jay Richard Bonin - Alexander Katz | 3.2 | 2026.05.27 Jay Richard Bonin | 1 | 95.90% | 1. d4 Nf6 2. c3 g6 3. Bg5 Bg7 | |
| 2026.05.27 | Round 2: Alexander Katz - Paruchuri, Naveen | 2.4 | 2026.05.27 Paruchuri, Naveen (30964636) (1952) | 1 | 90.30% | 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 | |
| 2026.05.26 | Round 1: Gartenlaub, Corin - Alexander Katz | 1.2 | 2026.05.26 Gartenlaub, Corin (30996546) (1901) | ½ | 85.20% | 1. e4 d6 2. d4 Nf6 3. Nc3 g6 | |
| 2026.05.25 | Round 4: Alexander Katz - Adewumi, Tanitoluwa | 4.1 | 2026.05.25 Adewumi, Tanitoluwa (30966396) (2473) | ½ | - | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 | |
| 2025.12.30 | Round 9: Koustav Chatterjee - Alexander Katz | 9.4 | 2025.12.30 Koustav Chatterjee (25073060) (2475) | ½ | 99.10% | 1. Nf3 Nf6 2. g3 d5 3. Bg2 c5 | |
| 2025.12.30 | Round 8: Alexander Katz - Girel, Joseph | 8.7 | 2025.12.30 Girel, Joseph (36033561) (2503) | 1 | 87.50% | 1. e4 Nc6 2. Nf3 d6 3. d4 Nf6 | |
| 2025.04.21 | Semana Santa A. 2025 | 9.22 | 2025.04.21 Berdayes Ason, Dylan Isidro (3516016) (2478) | ½ | 88.70% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | |
| 2024.12.18 | Round 4: Alexander Katz - Grant Rheingold | 4.5 | 2024.12.18 Grant Rheingold | 1 | 97.40% | 1. c4 e5 2. Nc3 Nc6 3. Nf3 Bc5 | |
| 2024.12.18 | Round 3: Bonin, Jay - Alexander Katz | 3.4 | 2024.12.18 Bonin, Jay (2000644) (2199) | ½ | 85.40% | 1. d4 d6 2. Bg5 g6 3. e4 Bg7 | |
| 2024.12.17 | Round 2: Alexander Katz - Tang, Andrew | 2.1 | 2024.12.17 Tang, Andrew (2059630) (2425) | 0 | 90.10% | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 | |
| 2023.12.10 | Round 5: Eugene Yoo - Alexander Katz | 2023.12.10 Eugene Yoo | ½ | 87.60% | 1. d4 Nf6 2. Nf3 e6 3. g3 d5 | ||
| 2023.12.09 | Round 4: Alexander Katz - Kiren Vivek Nasta | 2023.12.09 Kiren Vivek Nasta | 1 | 94.80% | 1. g3 d5 2. Bg2 e5 3. d3 Nf6 | ||
| 2023.12.09 | Round 3: Megan Althea Paragua - Alexander Katz | 2023.12.09 Megan Althea Paragua | 1 | 89.60% | 1. d4 Nf6 2. Nf3 d5 3. e3 Bf5 | ||
| 2023.12.09 | Round 2: Alexander Katz - Kyle Qiyu Dong | 2023.12.09 Kyle Qiyu Dong | ½ | 80.80% | 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 | ||
| 2023.11.11 | Round 9: Alexander Katz - Alexander Kaliksteyn | 2023.11.11 Alexander Kaliksteyn (2375) | ½ | 94.40% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | ||
| 2023.11.11 | Round 8: Titas Stremavicius - Alexander Katz | 2023.11.11 Titas Stremavicius (2563) | 0 | 91.20% | 1. d4 Nf6 2. Nf3 e6 3. g3 d5 | ||
| 2023.11.11 | Round 7: Alexander Katz - Luka Budisavljevic | 2023.11.11 Luka Budisavljevic (2492) | ½ | 97.30% | 1. e4 e6 2. d4 d5 3. exd5 exd5 | ||
| 2023.11.11 | Round 6: Sam Schmakel - Alexander Katz | 2023.11.11 Sam Schmakel (2447) | ½ | 96.20% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 | ||
| 2023.11.10 | Round 5: Josiah Stearman - Alexander Katz | 2023.11.10 Josiah Stearman (2476) | 0 | 93.20% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 | ||
| 2023.11.10 | Round 4: Alexander Katz - Brewington Hardaway | 2023.11.10 Brewington Hardaway (2345) | ½ | 87.10% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 | ||
| 2023.11.09 | Round 3: Anthony Atanasov - Alexander Katz | 2023.11.09 Anthony Atanasov (2406) | ½ | 97.00% | 1. e4 d6 2. d4 Nf6 3. Nc3 g6 | ||
| 2023.11.09 | Round 2: Alexander Katz - Djurabek Khamrakulov | 2023.11.09 Djurabek Khamrakulov (2500) | 0 | 90.10% | 1. e4 c6 2. d4 d5 3. e5 Bf5 | ||
| 2023.11.08 | Round 1: Alexander Katz - Nico Chasin | 2023.11.08 Nico Chasin (2419) | 1 | 93.60% | 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 | ||
| 2023.06.18 | Round 5: Oleiny Linares - Alexander Katz | 2023.06.18 Oleiny Linares | 0 | 85.90% | 1. Nf3 d5 2. c4 dxc4 3. Qc2 Nc6 | ||
| 2023.06.18 | Round 3: Hans Moke Niemann - Alexander Katz | 2023.06.18 Hans Moke Niemann | 1 | 91.00% | 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 | ||
| 2023.06.18 | Round 2: Barrett Winchell - Alexander Katz | 2023.06.18 Barrett Winchell | 1 | 96.70% | 1. e4 c6 2. d4 d5 3. e5 Bf5 | ||
| 2023.06.18 | Round 1: Alexander Katz - Brad Merrill | 2023.06.18 Brad Merrill | 1 | 100.00% | |||
| 2023.06.17 | Las Vegas National Open 2023 | 7 | 2023.06.17 Isaac Wang | 1 | 98.10% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | |
| 2023.06.17 | Las Vegas National Open 2023 | 6 | 2023.06.17 Ezra Chambers | 0 | 88.40% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 | |
| 2023.06.17 | Las Vegas National Open 2023 | 5 | 2023.06.17 Megan Lee | 1 | 96.90% | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 | |
| 2023.06.16 | Las Vegas National Open 2023 | 4 | 2023.06.16 Eric Liu | 0 | 90.80% | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 | |
| 2023.06.16 | Las Vegas National Open 2023 | 3 | 2023.06.16 Jayden Wu | 1 | 95.70% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | |
| 2023.06.15 | Las Vegas National Open 2023 | 2 | 2023.06.15 Patrick Liu | ½ | 93.60% | 1. d4 Nf6 2. c4 e6 3. g3 d5 | |
| 2023.06.15 | Round 1: Alexander Katz - Sreekar Gangavarapu | 2023.06.15 Sreekar Gangavarapu | 1 | 97.30% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | ||
| 2023.06.10 | Round 3: Alexander Katz - Anthony Angeles | 2023.06.10 Anthony Angeles | 0 | 91.20% | 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 | ||
| 2023.06.09 | Round 2: Roman Gavrilin - Alexander Katz | 2023.06.09 Roman Gavrilin | 0 | 87.60% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 | ||
| 2023.06.09 | Round 1: Alexander Katz - Henry Wang | 2023.06.09 Henry Wang | ½ | 98.40% | 1. e4 d6 2. d4 Nf6 3. Nc3 e5 | ||
| 2023.03.21 | Round 9: Alexander Katz - Cristhian Cruz | 2023.03.21 Cristhian Cruz | ½ | 77.10% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | ||
| 2023.03.21 | Round 8: Robert Akopian - Alexander Katz | 2023.03.21 Robert Akopian | 1 | 95.60% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 | ||
| 2023.03.21 | Round 7: Alexander Katz - Luis Carlos Torres Rosas | 2023.03.21 Luis Carlos Torres Rosas | 1 | 95.60% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | ||
| 2023.03.20 | Round 6: Jacob Chiang - Alexander Katz | 2023.03.20 Jacob Chiang | ½ | 94.40% | 1. c4 c5 2. Nf3 Nc6 3. d4 cxd4 | ||
| 2023.03.19 | Round 5: Alexander Katz - Gunnar Andersen | 2023.03.19 Gunnar Andersen | 0 | 89.20% | 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 | ||
| 2023.03.19 | Round 4: Varun Krishnan - Alexander Katz | 2023.03.19 Varun Krishnan | ½ | 97.90% | 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 | ||
| 2023.03.19 | Round 3: Alexander Katz - Aaron Jacobson | 2023.03.19 Aaron Jacobson | 1 | 93.90% | 1. e4 e6 2. d4 d5 3. Nc3 Nf6 | ||
| 2023.03.18 | Round 2: Semen Khanin - Alexander Katz | 2023.03.18 Semen Khanin | 0 | 87.60% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | ||
| 2023.03.18 | Round 1: Alexander Katz - Patrick Liu | 2023.03.18 Patrick Liu | 1 | 91.60% | 1. e4 c5 2. Nf3 g6 3. c3 Bg7 |