MESON Chess Problem Database
Search Results
| PID | YEARS | KINGS | GBR | STIP | AWARD | SOURCE | COMPOSER(S) |
|---|---|---|---|---|---|---|---|
| 23385 | 0000 | a1h8 | 0002.32 | #3 | None | Source? | de Jong, Leonard Nicholaas |
| 62471 | 0000 | b3c5 | 0124.13 | #2 | None | Source? | de Jong, Leonard Nicholaas |
| 69418 | 0000 | c8e5 | 1432.36 | #3 | 2nd HM. | Circ. Scacchistico Catanese | de Jong, Leonard Nicholaas |
| 62469 | 0000 | d1d4 | 1421.23 | #2 | None | Source? | de Jong, Leonard Nicholaas |
| 66498 | 0000 | d2e6 | 0455.34 | #3 | None | Bahn Frei | de Jong, Leonard Nicholaas |
| 62468 | 0000 | e1e5 | 1255.35 | #2 | None | Source? | de Jong, Leonard Nicholaas |
| 62470 | 0000 | e8d4 | 1248.53 | #3 | None | Source? | de Jong, Leonard Nicholaas |
| 63008 | 0000 | h5e5 | 1528.42 | #2 | None | Source? | de Jong, Leonard Nicholaas |
| 180935 | 1887 | g1a8 | 1720.00 | #3 | None | Utrecht Dagblad | de Jong, Leonard Nicholaas |
| 13194 | 1890 | f7a1 | 1720.00 | #3 | 4th Prize | Bahn Frei | de Jong, Leonard Nicholaas |
| 180840 | 1890 | g1c6 | 1248.15 | #2 | 1st Prize | Bahn Frei | de Jong, Leonard Nicholaas |
| 49413 | 1892 | b2a4 | 4075.14 | #3 | 2nd Prize | Nederlandse Schaakbond | de Jong, Leonard Nicholaas |
| 144400 | 1892 | b5e4 | 0552.45 | #2 | None | Bahn Frei | de Jong, Leonard Nicholaas |
| 41965 | 1893 | a4e2 | 1262.33 | #2 | None | Bahn Frei | de Jong, Leonard Nicholaas |
| 53242 | 1893 | b5e4 | 0452.44 | #2 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 53247 | 1893 | c1d4 | 1058.03 | #2 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 53261 | 1893 | f1d4 | 1131.22 | #3 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 53241 | 1893 | h4f3 | 1155.04 | #2 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 53043 | 1893 | h5h2 | 0240.13 | #3 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 53368 | 1894 | a2b4 | 1344.55 | #3 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 53365 | 1894 | g4f6 | 0226.11 | #3 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 53376 | 1894 | h3e5 | 1042.23 | #4 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 58670 | 1895 | a8h3 | 1742.21 | #2 | 1st Prize | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 58661 | 1895 | b1c4 | 1450.58 | #4 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 53545 | 1895 | f8c5 | 1715.57 | #4 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 58665 | 1895 | f8d8 | 1445.45 | #3 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 213900 | 1895 | h1h5 | 1516.22 | #2 | None | Deutsche Schachzeitung | de Jong, Leonard Nicholaas |
| 61752 | 1896 | a1c6 | 1558.34 | #2 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 25620 | 1896 | a2a6 | 0200.03 | #4 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 130248 | 1896 | a2a6 | 0200.04 | #4 | None | Source? | de Jong, Leonard Nicholaas |
| 66249 | 1896 | a6c5 | 1023.52 | #2 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 62460 | 1896 | b1e4 | 1041.22 | #3 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 66254 | 1896 | b8c5 | 0112.21 | #4 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 62992 | 1896 | c3d5 | 0247.54 | #3 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 62991 | 1896 | c8e4 | 1018.14 | #3 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 62453 | 1896 | e1e4 | 0022.32 | #3 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 62459 | 1896 | f6g2 | 1100.13 | #3 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 61753 | 1896 | g3e5 | 1544.23 | #2 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 62456 | 1896 | g8e5 | 0118.54 | #4 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 69413 | 1897 | a2d4 | 1042.51 | #2 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 69259 | 1897 | b5d6 | 0101.22 | #4 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 66582 | 1897 | c8d5 | 1175.33 | #2 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 69419 | 1897 | d1e4 | 1005.42 | #3 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 69260 | 1897 | e5g6 | 0110.22 | #4 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 69377 | 1897 | h2e5 | 1011.24 | #2 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 69386 | 1897 | h7e5 | 1057.22 | #3 | 1st HM. | Tidsskrift for Skak | de Jong, Leonard Nicholaas |
| 199481 | 1897 | h7h5 | 1117.24 | #2 | None | Haagsche Courant | de Jong, Leonard Nicholaas |
| 218181 | 1899 | a7f5 | 1117.33 | #4 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 130108 | 1900 | c4f4 | 1012.16 | #3 | 3rd HM. | Circolo Scacchistico Palermitano | de Jong, Leonard Nicholaas |
| 180841 | 1906 | f2f5 | 1225.46 | #2 | None | Haarlemsche Courant | de Jong, Leonard Nicholaas |
| 49176 | 1907 | e7e4 | 1061.43 | #3 | None | Op de Hoogte | de Jong, Leonard Nicholaas |
| 49175 | 1907 | f1d4 | 1012.13 | #3 | None | Op de Hoogte | de Jong, Leonard Nicholaas |
| 187729 | 1909 | a5f3 | 4571.34 | #2 | None | Chess Weekly | de Jong, Leonard Nicholaas |
| 185662 | 1909 | e3h8 | 1300.32 | #3 | None | Chess Weekly | de Jong, Leonard Nicholaas |
| 180846 | 1909 | h2f4 | 1051.12 | #3 | None | La Strategie | de Jong, Leonard Nicholaas |
| 187790 | 1909 | h4f3 | 1400.44 | #2 | None | Chess Weekly | de Jong, Leonard Nicholaas |
| 174417 | 1910 | a5c5 | 0005.43 | #3 | None | Dutch Problem Archive | de Jong, Leonard Nicholaas |
| 122613 | 1911 | a6e4 | 0200.42 | #4 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 122589 | 1911 | b1a3 | 0500.12 | #3 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 122581 | 1911 | b1d1 | 0203.13 | #3 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 122612 | 1911 | b1h1 | 0200.21 | #3 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 19979 | 1911 | b5a8 | 0400.10 | #4 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 20624 | 1911 | b6b8 | 0000.20 | #5 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 122582 | 1911 | c1a1 | 0100.02 | #3 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 122591 | 1911 | c1a1 | 0500.11 | #2 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 122614 | 1911 | c1a8 | 0100.76 | #4 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 122615 | 1911 | c1a8 | 0100.85 | #4 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 122598 | 1911 | c2a1 | 0230.30 | #3 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 122590 | 1911 | c2a1 | 0500.21 | #4 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 122587 | 1911 | c2a1 | 3200.43 | #3 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 122583 | 1911 | c2a2 | 0100.54 | #4 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 189450 | 1911 | c4e4 | 1513.25 | #2 | None | La Strategie | de Jong, Leonard Nicholaas |
| 122599 | 1911 | c6h7 | 0203.40 | #2 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 122605 | 1911 | c7a4 | 0500.25 | #3 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 122595 | 1911 | c7a7 | 0130.10 | #3 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 122592 | 1911 | c7a8 | 0500.40 | #3 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 122602 | 1911 | c7c5 | 0200.42 | #3 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 186432 | 1911 | d2b1 | 0100.20 | #4 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 122603 | 1911 | d3b2 | 0200.41 | #4 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 13759 | 1911 | d3e6 | 0200.10 | #3 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 122586 | 1911 | e1e5 | 0100.51 | #4 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 122601 | 1911 | e3a4 | 0200.14 | #4 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 122609 | 1911 | e6c5 | 0236.52 | #3 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 122580 | 1911 | e6d4 | 0200.01 | #3 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 122610 | 1911 | e7c4 | 0200.65 | #3 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 116825 | 1911 | e8c8 | 0506.52 | #2 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 186437 | 1911 | f2h1 | 0103.10 | #4 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 122597 | 1911 | f2h1 | 0230.20 | #4 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 122584 | 1911 | f2h1 | 0230.36 | #3 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 116826 | 1911 | f4d4 | 0206.43 | #2 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 122617 | 1911 | f5a8 | 0230.45 | #3 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 122607 | 1911 | f5h5 | 0230.13 | #4 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 122616 | 1911 | f6a6 | 0200.23 | #3 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 175937 | 1911 | f7d5 | 0001.65 | #3 | None | Dutch Problem Archive | de Jong, Leonard Nicholaas |
| 122606 | 1911 | f7h5 | 0200.22 | #3 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 122604 | 1911 | f8h6 | 0200.13 | #3 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 116827 | 1911 | g4h2 | 0233.13 | #2 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 122572 | 1911 | g6g8 | 0430.53 | #3 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 122600 | 1911 | g8h6 | 0206.12 | #3 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 122585 | 1911 | h6f7 | 0103.43 | #3 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 122594 | 1911 | h6h4 | 0500.52 | #3 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 122593 | 1911 | h6h8 | 0403.22 | #3 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 186451 | 1911 | h6h8 | 0500.01 | #4 | None | More White Rooks | de Jong, Leonard Nicholaas |
| 186536 | 1912 | e1a1 | 0101.03 | #4 | None | La Strategie | de Jong, Leonard Nicholaas |
| 189715 | 1912 | f5d5 | 0133.41 | #2 | None | Source? | de Jong, Leonard Nicholaas |
| 200378 | 1912 | f6h8 | 1410.50 | #2 | None | Op de Hoogte | de Jong, Leonard Nicholaas |
| 190985 | 1913 | c3a1 | 0230.02 | #4 | None | La Strategie | de Jong, Leonard Nicholaas |
| 190518 | 1913 | d8d6 | 0000.41 | #3 | None | La Strategie | de Jong, Leonard Nicholaas |
| 190977 | 1913 | e5g7 | 0200.03 | #4 | None | La Strategie | de Jong, Leonard Nicholaas |
| 190974 | 1913 | f7g4 | 0100.40 | #4 | None | La Strategie | de Jong, Leonard Nicholaas |
| 189971 | 1913 | g3h1 | 0230.01 | #2 | None | La Strategie | de Jong, Leonard Nicholaas |
| 188048 | 1913 | g7e6 | 0200.05 | #5 | None | La Strategie | de Jong, Leonard Nicholaas |
| 64589 | 1914 | a7e4 | 1414.32 | #2 | 2nd Prize | Good Companions (May) | de Jong, Leonard Nicholaas |
| 152229 | 1914 | b3a8 | 1731.13 | #2 | None | Good Companions (May) | de Jong, Leonard Nicholaas |
| 180843 | 1914 | b5h5 | 1033.36 | #4 | None | The Problem | de Jong, Leonard Nicholaas |
| 191314 | 1914 | c8a8 | 0130.20 | #5 | None | La Strategie | de Jong, Leonard Nicholaas |
| 191104 | 1914 | d7d5 | 0000.31 | #3 | None | La Strategie | de Jong, Leonard Nicholaas |
| 212983 | 1914 | f4d5 | 1000.31 | #3 | None | Op de Hoogte | de Jong, Leonard Nicholaas |
| 212994 | 1914 | f6f4 | 0230.11 | #4 | None | Op de Hoogte | de Jong, Leonard Nicholaas |
| 152227 | 1914 | g3e5 | 1404.44 | #2 | None | Good Companions (May) | de Jong, Leonard Nicholaas |
| 180847 | 1914 | g8e6 | 1065.15 | #4 | None | Utrecht Dagblad | de Jong, Leonard Nicholaas |
| 212993 | 1914 | h1g4 | 1000.31 | #3 | None | Op de Hoogte | de Jong, Leonard Nicholaas |
| 21026 | 1915 | c3c5 | 1113.43 | #2 | None | Good Companions (October) | de Jong, Leonard Nicholaas |
| 64626 | 1915 | f4c4 | 4411.35 | #2 | None | Good Companions (December) | de Jong, Leonard Nicholaas |
| 152297 | 1915 | f6d5 | 1517.38 | #2 | None | Good Companions (October) | de Jong, Leonard Nicholaas |
| 200377 | 1915 | h5f4 | 0247.53 | #2 | None | Op de Hoogte | de Jong, Leonard Nicholaas |
| 194134 | 1917 | g4d4 | 0008.34 | #2 | None | The White Knights | de Jong, Leonard Nicholaas |
| 200376 | 1918 | c1e1 | 4144.33 | #2 | None | Op de Hoogte | de Jong, Leonard Nicholaas |
| 200379 | 1918 | c8a8 | 0500.01 | #2 | None | Op de Hoogte | de Jong, Leonard Nicholaas |
| 193147 | 1918 | d1a8 | 1011.43 | #3 | None | Op de Hoogte | de Jong, Leonard Nicholaas |
| 212992 | 1918 | f5h4 | 0200.54 | #3 | None | Op de Hoogte | de Jong, Leonard Nicholaas |
| 161277 | 1921 | a2a6 | 0200.02 | #3 | None | Dutch Problem Archive | de Jong, Leonard Nicholaas |
| 198028 | 1921 | f3d5 | 3120.35 | #4 | None | Dutch Problem Archive | de Jong, Leonard Nicholaas |
| 34342 | 1922 | b1a3 | 0135.44 | #3 | None | Pittsburgh Post | de Jong, Leonard Nicholaas |
| 201140 | 1922 | d1d4 | 1020.11 | #3 | None | Good Companions | de Jong, Leonard Nicholaas |
| 101534 | 1922 | f2f4 | 0141.21 | #3 | None | Good Companions | de Jong, Leonard Nicholaas |
| 201022 | 1923 | f4h3 | 0110.43 | #4 | None | Dutch Problem Archive | de Jong, Leonard Nicholaas |
| 167371 | 1926 | c6e4 | 0021.02 | #3 | None | Dutch Problem Archive | de Jong, Leonard Nicholaas |
| 189307 | 1926 | d1d6 | 1035.35 | #3 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 227488 | 1926 | e3e1 | 0023.00 | #2 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 165823 | 1927 | a7b5 | 0200.20 | #3 | None | Source? | de Jong, Leonard Nicholaas |
| 161933 | 1927 | b6b4 | 0110.22 | #3 | None | Source? | de Jong, Leonard Nicholaas |
| 165822 | 1927 | b8b5 | 0200.30 | #3 | None | Source? | de Jong, Leonard Nicholaas |
| 166530 | 1927 | c3c1 | 0100.20 | #3 | None | Source? | de Jong, Leonard Nicholaas |
| 172186 | 1927 | c5a5 | 0011.12 | #3 | None | Source? | de Jong, Leonard Nicholaas |
| 158643 | 1927 | c6e6 | 1010.01 | #3 | None | Source? | de Jong, Leonard Nicholaas |
| 165878 | 1927 | c7e4 | 0111.10 | #3 | None | Source? | de Jong, Leonard Nicholaas |
| 166612 | 1927 | d1h1 | 1031.12 | #3 | None | Source? | de Jong, Leonard Nicholaas |
| 161932 | 1927 | d8c6 | 0110.22 | #3 | None | Source? | de Jong, Leonard Nicholaas |
| 166934 | 1927 | e6e8 | 0130.10 | #3 | None | Source? | de Jong, Leonard Nicholaas |
| 166932 | 1927 | f2h1 | 0400.11 | #3 | None | Source? | de Jong, Leonard Nicholaas |
| 161054 | 1927 | f5g3 | 0200.12 | #3 | None | Source? | de Jong, Leonard Nicholaas |
| 157620 | 1927 | f7h7 | 0010.10 | #3 | None | Source? | de Jong, Leonard Nicholaas |
| 23386 | 1927 | g2h4 | 0130.45 | #3 | None | Source? | de Jong, Leonard Nicholaas |
| 120245 | 1928 | e2e4 | 0200.33 | #4 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 213616 | 1928 | f3g5 | 0110.00 | #3 | None | Neue Leipziger Zeitung | de Jong, Leonard Nicholaas |
| 213646 | 1928 | f5d5 | 0200.12 | #3 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 35871 | 1928 | f6d4 | 0200.02 | #4 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 34889 | 1928 | f6g8 | 0011.00 | #4 | None | Neue Leipziger Zeitung | de Jong, Leonard Nicholaas |
| 180845 | 1928 | h7e5 | 1041.32 | #3 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 41808 | 1929 | a3g1 | 1720.31 | #2 | None | De Problemist | de Jong, Leonard Nicholaas |
| 34796 | 1929 | a6c4 | 1834.42 | #2 | None | De Problemist | de Jong, Leonard Nicholaas |
| 41809 | 1929 | a8d7 | 4445.14 | #2 | None | De Problemist | de Jong, Leonard Nicholaas |
| 181210 | 1929 | c3a1 | 3200.64 | #4 | None | Rotterdamsch Schaaknieuws | de Jong, Leonard Nicholaas |
| 249439 | 1929 | c5f5 | 1041.25 | #3 | None | Die Schwalbe | de Jong, Leonard Nicholaas |
| 205937 | 1929 | c6a7 | 0011.01 | #4 | None | Noord-Hollandsch Dagblad | de Jong, Leonard Nicholaas |
| 189306 | 1929 | d1d3 | 3232.24 | #2 | None | L'Italia Scacchistica | de Jong, Leonard Nicholaas |
| 38051 | 1929 | d7d5 | 0645.65 | #3 | None | L'Echiquier | de Jong, Leonard Nicholaas |
| 206019 | 1929 | e1b2 | 0201.67 | #5 | None | Die Schwalbe | de Jong, Leonard Nicholaas |
| 205976 | 1929 | e2a1 | 0111.33 | #4 | None | Dutch Problem Archive | de Jong, Leonard Nicholaas |
| 181212 | 1929 | e4e7 | 0200.22 | #3 | None | Western Morning News and Mercury | de Jong, Leonard Nicholaas |
| 185294 | 1929 | e6e8 | 3800.17 | #5 | None | L'Italia Scacchistica | de Jong, Leonard Nicholaas |
| 205975 | 1929 | f4c4 | 1302.16 | #4 | None | Die Schwalbe | de Jong, Leonard Nicholaas |
| 205977 | 1929 | f6e8 | 3530.17 | #4 | None | Deutsche Schachzeitung | de Jong, Leonard Nicholaas |
| 35661 | 1929 | g7d4 | 1311.45 | #3 | HM. | Magyar Sakkvilag | de Jong, Leonard Nicholaas |
| 248974 | 1929 | h1a2 | 0500.44 | #4 | None | Die Schwalbe | de Jong, Leonard Nicholaas |
| 168143 | 1929 | h1h3 | 0042.10 | #3 | None | Club d'Echecs Residentie | de Jong, Leonard Nicholaas |
| 181211 | 1929 | h6h8 | 0130.42 | #5 | None | Swiat Szachowy | de Jong, Leonard Nicholaas |
| 180936 | 1929 | h7a1 | 1700.11 | #3 | None | Noord-Hollandsch Dagblad | de Jong, Leonard Nicholaas |
| 48794 | 1930 | a2a4 | 0032.43 | #5 | None | The Problemist | de Jong, Leonard Nicholaas |
| 222741 | 1930 | a2h8 | 0100.58 | #4 | None | British Chess Magazine | de Jong, Leonard Nicholaas |
| 180967 | 1930 | a6b8 | 3200.32 | #4 | None | Wiener Schachzeitung | de Jong, Leonard Nicholaas |
| 209005 | 1930 | a7a5 | 0800.43 | #4 | None | Allgemeine Zeitung Chemnitz | de Jong, Leonard Nicholaas |
| 180842 | 1930 | d2e5 | 0012.55 | #5 | None | Die Schwalbe | de Jong, Leonard Nicholaas |
| 189308 | 1930 | e1e3 | 0111.42 | #5 | None | The Problemist | de Jong, Leonard Nicholaas |
| 252718 | 1930 | e2d5 | 1011.10 | #3 | None | Schackvarlden | de Jong, Leonard Nicholaas |
| 185292 | 1930 | g6h8 | 0800.04 | #4 | None | Chemnitzer Wochenschach (Allgemeine Zeitung Chemnitz) | de Jong, Leonard Nicholaas |
| 144213 | 1930 | g8a1 | 1001.15 | #3 | 1st Prize | Magyar Sakkvilag | de Jong, Leonard Nicholaas |
| 180968 | 1930 | h1a8 | 0500.22 | #5 | None | Wiener Schachzeitung | de Jong, Leonard Nicholaas |
| 208999 | 1930 | h1h8 | 0530.15 | #4 | None | Dutch Problem Archive | de Jong, Leonard Nicholaas |
| 66310 | 1931 | a6e5 | 1478.40 | #3 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 229725 | 1931 | a8h1 | 1301.02 | #4 | None | De Maasbode | de Jong, Leonard Nicholaas |
| 66320 | 1931 | b3d5 | 1047.63 | #3 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 229767 | 1931 | c3a1 | 3200.61 | #4 | None | De Maasbode | de Jong, Leonard Nicholaas |
| 27398 | 1931 | c4a1 | 1133.53 | #3 | None | Magasinet | Niemeijer, Meindert & de Jong, Leonard Nicholaas |
| 268463 | 1931 | e1g2 | 1110.24 | #3 | None | Die Schwalbe | de Jong, Leonard Nicholaas |
| 252720 | 1931 | e5d2 | 1130.02 | #3 | None | Schackvarlden | de Jong, Leonard Nicholaas |
| 27044 | 1931 | h1a8 | 1703.02 | #3 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 193295 | 1932 | a6d5 | 4142.42 | #3 | None | Tijdschrift vd NSB | de Jong, Leonard Nicholaas |
| 229867 | 1932 | b6b4 | 0010.50 | #4 | None | De Maasbode | de Jong, Leonard Nicholaas |
| 155691 | 1932 | c8e4 | 4472.36 | #2 | None | Nederlandse Bond van Probleemvrienden | de Jong, Leonard Nicholaas |
| 155791 | 1932 | e3d5 | 1852.31 | #2 | None | Nederlandse Bond van Probleemvrienden | de Jong, Leonard Nicholaas |
| 6756 | 1933 | a1e5 | 4511.02 | #2 | 4/5 Prize | Il Problema | de Jong, Leonard Nicholaas |
| 230093 | 1933 | f1f5 | 0111.44 | #4 | None | De Maasbode | de Jong, Leonard Nicholaas |
| 154146 | 1934 | f2h1 | 0830.22 | #4 | 1st HM. | Match: Denmark - Netherlands - Poland | de Jong, Leonard Nicholaas |
| 230574 | 1936 | c7d5 | 0110.12 | #4 | None | De Maasbode | de Jong, Leonard Nicholaas |
| 264104 | 1937 | b2e5 | 1018.53 | #2 | None | Tijdschrift vd KNSB | de Jong, Leonard Nicholaas |
| 232047 | 1937 | d2b2 | 0120.23 | #4 | None | De Maasbode | de Jong, Leonard Nicholaas |
| 36720 | 1937 | g2e1 | 0500.00 | #4 | None | De Schaakwereld | de Jong, Leonard Nicholaas |
| 36721 | 1938 | c1d3 | 0200.03 | #4 | None | De Schaakwereld | de Jong, Leonard Nicholaas |
| 120246 | 1938 | c6b1 | 1130.12 | #4 | None | Tijdschrift vd KNSB | de Jong, Leonard Nicholaas |
| 189309 | 1938 | e3e5 | 1002.03 | #3 | None | De Schaakwereld | de Jong, Leonard Nicholaas |
| 185293 | 1939 | g6g8 | 3500.33 | #4 | None | De Schaakwereld | de Jong, Leonard Nicholaas |
| 59606 | 1940 | c3e4 | 1888.23 | #2 | 1st Prize | Tijdschrift vd KNSB 17. TT | Drese, Gerardus Hendrikus & Koldijk, Albert Marinus & Sammelius, Carel Johan Robert & de Jong, Leonard Nicholaas |
| 139735 | 1941 | h1a1 | 0206.11 | #3 | None | Probleemcomponisten I - L N de Jong | de Jong, Leonard Nicholaas |
| 185317 | 1941 | h8a8 | 0206.02 | #3 | None | Probleemcomponisten I - L N de Jong | de Jong, Leonard Nicholaas |
| 185318 | 1941 | h8a8 | 0806.31 | #4 | None | Probleemcomponisten I - L N de Jong | de Jong, Leonard Nicholaas |
| 219743 | 1967 | a2d5 | 4826.14 | #3 | None | Land og Folk | de Jong, Leonard Nicholaas |
| 33685 | 1972 | b3d4 | 0110.00 | #5 | None | Nederland in Miniatuur | de Jong, Leonard Nicholaas |
| 30226 | 1974 | b6d7 | 0427.31 | #3 | None | Probleemblad | de Jong, Leonard Nicholaas |
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).