MESON Chess Problem Database

Problem Display
PID: 86518 (8/Q7/2p5/1RPpp3/2Pk4/1Pp5/4KN2/8 w - - 0 1)

Melnichenko, Viktor Oleksandrovich

Shakhmaty v SSSR, 1964

8/Q7/2p5/1RPpp3/2Pk4/1Pp5/4KN2/8

#2

7 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...c2
      • 2.Qa1#
    • 1...dxc4
      • 2.Qd7#
    • 1...e4
      • 2.Qg7#
    • 1...cxb5
      • 2.c6#
  • Tries
    • 1.Kf3?
      • 1...dxc4
        • 2.Qd7#
      • 1...cxb5
        • 2.c6#
      • 1...c2
        • 2.Qa1#
      • 1...e4+!
    • 1.Ra5?
      • 1...dxc4
        • 2.Qd7#
      • 1...e4
        • 2.Qg7#
      • 1...c2!
    • 1.Qb7?
      • 1...dxc4
        • 2.Qd7#
      • 1...cxb5
        • 2.Qxd5#
      • 1...e4
        • 2.Qg7#
      • 1...c2!
    • 1.Qd7?
      • 1...cxb5
        • 2.Qxd5#
      • 1...e4
        • 2.Qg7#
      • 1...c2!
    • 1.Qf7?
      • 1...dxc4
        • 2.Qxc4#
        • 2.Qd7#
      • 1...cxb5
        • 2.Qxd5#
      • 1...e4
        • 2.Qf6#
        • 2.Qg7#
      • 1...c2!
    • 1.Qh7?
      • threat
        • 2.Qd3#
      • 1...dxc4
        • 2.Qe4#
        • 2.Qd7#
      • 1...e4
        • 2.Qg7#
        • 2.Qh8#
      • 1...cxb5!
  • Keys
    • 1.Qa8!
      • 1...dxc4
        • 2.Qd8#
      • 1...cxb5
        • 2.Qxd5#
      • 1...c2
        • 2.Qa1#
      • 1...e4
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATEB::QAB(G)
    • P(c);OGATEB,XP(D)::QAR(G)
    • P(d);OGATEB::QAB(G)
    • P(e);OGATE,XR(E)::QAB(G)+P(F)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Vars
        • P(c);OGATEB,XP(D)::QAR(G)
        • P(e);OGATE,XR(E)::QAB(G)+P(F)
        • P(a);OGATEB::QAB(G)
      • Refutation
        • P(d);CHECK
    • Try
      • R(E);
      • Vars
        • P(c);OGATEB,XP(D)::QAR(G)
        • P(d);OGATEB::QAB(G)
      • Refutation
        • P(a);
    • Try
      • Q(G);
      • Vars
        • P(c);OGATEB,XP(D)::QAR(G)
        • P(e);OGATE,XR(E)::QAR1(G),XP(c)
        • P(d);OGATEB::QAB(G)
      • Refutation
        • P(a);
    • Try
      • Q(G);P_PINP(c)
      • Vars
        • P(e);N_GUARD,XR(E)::QAR1(G),XP(c)
        • P(d);OGATEB::QAB(G)
      • Refutation
        • P(a);
    • Try
      • Q(G);
      • Vars
        • P(e);N_GUARD,XR(E)::QAR1(G),XP(c)
      • Refutation
        • P(a);
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Refutation
        • P(e);XR(E)
  • Actual
    • Q(G);
    • Vars
      • P(c);OGATEB,XP(D)::QAR(G)
      • P(e);OGATE,XR(E)::QAR1(G),XP(c)
      • P(a);OGATEB::QAB(G)
      • P(d);OGATEB::QAB(G)
HTML5 logo

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).