ðeɪ hæv pˈʌblɪʃt bˈʊks təɡˌɛðɚ ænd ˈiːvən ɪstˈæblɪʃt ɐ tʃˈɛs skˈuːl ɪnðə nˈaɪntiːnhˈʌndɹɪd nˈaɪnti z, tˈɜːnɪŋ ˈaʊt mˈɛnɪəv tədˈeɪz tˈɑːpflˈaɪt ɡɹˈændmæstɚz.
They have published books together and even established a chess school in the 1990s, turning out many of today's top-flight grandmasters.