MESON Chess Problem Database

Problem Display
PID: 253659 (8/7K/6N1/5ppk/4p3/4Q2P/6P1/8 w - - 0 1)

Chernyavsky, Mykola Vasilovich

Kapustin, Fedor Mikhailovich

Sachmatija, 2021

8/7K/6N1/5ppk/4p3/4Q2P/6P1/8

#2

5 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...g4
      • 2.Qh6#
  • Tries
    • 1.Kg7?
      • 1...g4
        • 2.Qh6#
      • 1...f4!
    • 1.Sf4+?
      • 1...Kh4
        • 2.Qf2#
        • 2.Qe1#
        • 2.g3#
      • 1...gxf4!
    • 1.Qf3+?
      • 1...g4
        • 2.Qxf5#
      • 1...exf3!
    • 1.Qg3?
      • 1...g4
        • 2.Qh4#
      • 1...f4
        • 2.Qg4#
      • 1...e3!
    • 1.Qxe4?
      • 1...fxe4
        • 2.g4#
      • 1...g4
        • 2.Qxf5#
      • 1...f4!
  • Keys
    • 1.g3!
      • 1...f4
        • 2.g4#
      • 1...g4
        • 2.Qh6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATE::QAR1(B)
  • Tries
    • Try
      • K(E);P-FLIGHT
      • Vars
        • P(c);OGATE::QAR1(B)
      • Refutation
        • P(b);
    • Try
      • S(D);CHECK
      • Refutation
        • P(c);XS(D)
    • Try
      • Q(B);CHECK
      • Vars
        • P(c);OGATEB,P_SPINP(c)::QAR2(B),XP(b)
      • Refutation
        • P(a);XQ(B)
    • Try
      • Q(B);
      • Vars
        • P(c);N_GUARD::QAR1(B)
        • P(b);N_GUARD::QAB1(B)
      • Refutation
        • P(a);
    • Try
      • Q(B);XP(a)
      • Vars
        • P(b);N_GUARD,XQ(B)::P(A)
        • P(c);OGATEB::QAR2(B),XP(b)
      • Refutation
        • P(b);
  • Actual
    • P(A);
    • Vars
      • P(b);N_GUARD::P(A)
      • P(c);OGATE::QAR1(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).