MESON Chess Problem Database

Problem Display
PID: 270641 (8/8/5Np1/5k2/3Q4/B5K1/8/8 w - - 0 1)

Nagovitsin, Eduard Nikolaevich

Shakhmatnaya kompozitsiya, 2020

8/8/5Np1/5k2/3Q4/B5K1/8/8

#2

4 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Kg5
      • 2.Qf4#
  • Tries
    • 1.Be7?
      • threat
        • 2.Qd5#
      • 1...Kg5
        • 2.Qf4#
      • 1...g5
        • 2.Qe4#
      • 1...Ke6!
    • 1.Qe4+?
      • 1...Kg5
        • 2.Qf4#
      • 1...Kxf6!
    • 1.Qd6?
      • 1...Kg5
        • 2.Qf4#
      • 1...g5!
  • Keys
    • 1.Bb2!
      • threat
        • 2.Qe5#
        • 2.Qg4#
        • 2.Qd5#
      • 1...Kg5
        • 2.Qf4#
      • 1...Ke6
        • 2.Qd7#
      • 1...g5
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);N_GUARD,P-FLIGHT::QAB1(C)
  • Tries
    • Try
      • B(A);
      • Threat
        • QAR2(C)
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAB1(C)
        • P(b);SBLOCK::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT,XS(D)
    • Try
      • Q(C);
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAB1(C)
      • Refutation
        • P(b);
  • Actual
    • B(A);
    • Threat
      • DUALS(3)
    • Vars
      • K(a);N_GUARD,P-FLIGHT::QAB1(C)
      • K(a);N_GUARD,S_FLIGHT::QAB1(C)
      • P(b);SBLOCK::QAB1(C)
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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).