MESON Chess Problem Database

Problem Display
PID: 252905 (3KN3/5p2/2p1kp2/2P1p3/8/4p1R1/1N6/4Q3 w - - 0 1)

Efimenko, Nikola

Svetilsky, Anatoly Volodimirovich

Schach, 1982

3KN3/5p2/2p1kp2/2P1p3/8/4p1R1/1N6/4Q3

#2

6 + 6

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qb4?
      • 1...Kd5
        • 2.Sc7#
        • 2.Qc4#
      • 1...Kf5
        • 2.Sg7#
        • 2.Qg4#
      • 1...e4
        • 2.Qxe4#
      • 1...f5
        • 2.Qb3#
        • 2.Qc4#
      • 1...e2!
    • 1.Qb1?
      • threat
        • 2.Sc7#
      • 1...e4
        • 2.Qxe4#
      • 1...f5
        • 2.Qa2#
      • 1...Kd5!
    • 1.Qd1?
      • threat
        • 2.Sg7#
        • 2.Qd7#
      • 1...Kf5
        • 2.Qg4#
      • 1...f5
        • 2.Qb3#
        • 2.Qd6#
        • 2.Qd7#
      • 1...e4!
    • 1.Qf1?
      • threat
        • 2.Sc7#
      • 1...Kd5
        • 2.Qc4#
      • 1...f5
        • 2.Qc4#
      • 1...e4!
    • 1.Qh1?
      • threat
        • 2.Sg7#
      • 1...e4
        • 2.Qxe4#
      • 1...f5
        • 2.Qxc6#
      • 1...Kf5!
    • 1.Qe2?
      • 1...Kd5
        • 2.Qc4#
      • 1...Kf5
        • 2.Qg4#
      • 1...f5
        • 2.Qc4#
      • 1...e4!
  • Keys
    • 1.Qxe3!
      • 1...Kd5
        • 2.Sc7#
      • 1...Kf5
        • 2.Sg7#
      • 1...e4
        • 2.Qxe4#
      • 1...f5
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Vars
        • P(b);OGATEB::QAR2(A),XP(b)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Threat
        • S(F)
      • Vars
        • P(b);OGATEB::QAR2(A),XP(b)
        • P(e);SBLOCK::QAB(A)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(d);N_GUARD,S_CUTP(e),S_FLIGHT::QAB1(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Threat
        • S(F)
      • Vars
        • K(d);N_GUARD,S_FLIGHT::QAB1(A)
        • P(e);SBLOCK::QAB(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Threat
        • S(F)
      • Vars
        • P(b);OGATEB::QAR2(A),XP(b)
        • P(e);SBLOCK::QAR2(A),XP(c)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(d);N_GUARD,S_FLIGHT::QAB1(A)
        • K(d);N_GUARD,S_CUTP(e),S_FLIGHT::QAB1(A)
        • P(e);SBLOCK::QAB(A)
      • Refutation
        • P(b);
  • Actual
    • Q(A);P_PINP(b),XP(a)
    • Vars
      • K(d);N_GUARD,N_SPINP(b),S_FLIGHT::S(F)
      • P(b);OGATEB::QAR2(A),XP(b)
      • P(e);SBLOCK::QAB(A)
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).