MESON Chess Problem Database

Problem Display
PID: 18866 (8/KNkp4/2p5/8/2Q5/8/4B3/8 w - - 0 1)

Dorokhov, Yuri Georgievich

Tuvinskaya Pravda, 1958

8/KNkp4/2p5/8/2Q5/8/4B3/8

#2

4 + 3

3296 Shakhmatny zadachi miniaturi 1987
3813 300 Sachmatu Uzdaviniu 1991

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Qxc5#
  • Tries
    • 1.Qg8?
      • threat
        • 2.Qb8#
        • 2.Qd8#
      • 1...d5
        • 2.Qd8#
      • 1...d6
        • 2.Qd8#
      • 1...c5!
    • 1.Qf4+?
      • 1...Kc8
        • 2.Qb8#
      • 1...d6!
    • 1.Qh4?
      • threat
        • 2.Qd8#
      • 1...Kc8
        • 2.Qd8#
      • 1...c5!
  • Keys
    • 1.Bg4!
      • 1...Kc8
        • 2.Qxc6#
      • 1...c5
        • 2.Qxc5#
      • 1...d5
        • 2.Qf4#
      • 1...d6
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATEB::QAR2(B),XP(a)
  • Tries
    • Try
      • Q(B);N_PINP(a)
      • Threat
        • DUALS(2)
      • Vars
        • P(c);::QAB1(B)
      • Refutation
        • P(a);
    • Try
      • Q(B);CHECK,N_PINP(a)
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(B)
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • Q(B);N_PINP(a)
      • Threat
        • QAB1(B)
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • P(a);
  • Actual
    • B(A);
    • Vars
      • K(b);P-FLIGHT::QAR2(B),XP(a)
      • P(a);OGATEB::QAR2(B),XP(a)
      • P(c);N_GUARD::QAB(B)
      • P(c);OGATEB::QAR(B)
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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).