MESON Chess Problem Database

Problem Display
PID: 273103 (8/5Q2/P1P1P1p1/1N1kp1p1/6K1/1P1N4/8/8 w - - 0 1)

Podlivaylo, V

Mat, 1980

8/5Q2/P1P1P1p1/1N1kp1p1/6K1/1P1N4/8/8

#2

8 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qf3#
    • 1...Kxc6
      • 2.Qb7#
    • 1...e4
      • 2.Qd7#
  • Tries
    • 1.Kg3?
      • 1...Ke4
        • 2.Qf3#
      • 1...Kxc6
        • 2.Qb7#
      • 1...e4
        • 2.Qd7#
      • 1...g4!
    • 1.Kxg5?
      • 1...Kxc6
        • 2.Qb7#
      • 1...e4
        • 2.Qd7#
      • 1...Ke4!
    • 1.Sb4+?
      • 1...Ke4
        • 2.Qf3#
      • 1...Kc5!
    • 1.Qe8?
      • 1...e4
        • 2.Qd7#
      • 1...Ke4!
    • 1.Qe7?
      • 1...Kxc6
        • 2.Qc5#
        • 2.Qb7#
      • 1...e4
        • 2.Qd6#
        • 2.Qd7#
      • 1...Ke4!
    • 1.a7?
      • 1...Ke4
        • 2.Qf3#
      • 1...e4
        • 2.Qd7#
      • 1...Kxc6!
    • 1.c7?
      • 1...Ke4
        • 2.Qf3#
      • 1...e4
        • 2.Qd7#
      • 1...Kc6!
    • 1.e7+?
      • 1...Ke4
        • 2.Qf3#
      • 1...Kxc6!
  • Keys
    • 1.Qf8!
      • 1...Ke4
        • 2.Qf3#
      • 1...Kxc6
        • 2.Qc5#
      • 1...Kxe6
        • 2.Sc7#
      • 1...e4
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);N_GUARD,S_CUTP(b),S_FLIGHT::QAB1(H)
    • K(a);OGATEB,S_FLIGHT,XP(F)::QAB1(H)
    • P(b);SBLOCK::QAR2(H)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(a);N_GUARD,S_CUTP(b),S_FLIGHT::QAB1(H)
        • K(a);OGATEB,S_FLIGHT,XP(F)::QAB1(H)
        • P(b);SBLOCK::QAR2(H)
      • Refutation
        • P(c);
    • Try
      • K(C);P-FLIGHT,XP(c)
      • Vars
        • K(a);OGATEB,S_FLIGHT,XP(F)::QAB1(H)
        • P(b);SBLOCK::QAR2(H)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(B);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB1(H)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(H);
      • Vars
        • P(b);SBLOCK::QAR2(H)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(H);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(E);
      • Vars
        • K(a);N_GUARD,S_CUTP(b),S_FLIGHT::QAB1(H)
        • P(b);SBLOCK::QAR2(H)
      • Refutation
        • K(a);S_FLIGHT,XP(F)
    • Try
      • P(F);
      • Vars
        • K(a);N_GUARD,S_CUTP(b),S_FLIGHT::QAB1(H)
        • P(b);SBLOCK::QAR2(H)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(G);CHECK
      • Vars
        • K(a);N_GUARD,S_CUTP(b),S_FLIGHT::QAB1(H)
      • Refutation
        • K(a);S_FLIGHT,XP(F)
  • Actual
    • Q(H);
    • Vars
      • K(a);N_GUARD,S_CUTP(b),S_FLIGHT::QAB1(H)
      • K(a);N_GUARD,S_FLIGHT,XP(F)::QAR1(H)
      • K(a);N_GUARD,S_FLIGHT,XP(G)::S(D)
      • P(b);SBLOCK::QAR1(H)
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).