MESON Chess Problem Database

Problem Display
PID: 244110 (5B2/3B1K2/8/6kp/2Q5/8/4n3/8 w - - 0 1)

Belchikov, Nikolai Ivanovich

64 Shakhmatnoe obozrenie, 2013

5B2/3B1K2/8/6kp/2Q5/8/4n3/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...h4
      • 2.Qg4#
  • Tries
    • 1.Kg7?
      • threat
        • 2.Be7#
      • 1...h4
        • 2.Qg4#
      • 1...Sd4!
    • 1.Qd3?
      • 1...Kh4
        • 2.Be7#
      • 1...Sc1
        • 2.Qg3#
      • 1...Sg1
        • 2.Qg3#
      • 1...Sc3
        • 2.Qg3#
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sd4
        • 2.Qg3#
      • 1...Sf4
        • 2.Qg3#
      • 1...h4
        • 2.Qf5#
      • 1...Kf4!
    • 1.Qd4?
      • threat
        • 2.Qf6#
      • 1...h4
        • 2.Qe5#
        • 2.Qg4#
      • 1...Sxd4!
  • Keys
    • 1.Qc7!
      • 1...Kh4
        • 2.Be7#
      • 1...Sc1
        • 2.Qg3#
      • 1...Sg1
        • 2.Qg3#
      • 1...Sc3
        • 2.Qg3#
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sd4
        • 2.Qg3#
      • 1...Sf4
        • 2.Qd8#
      • 1...h4
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • P(c);N_GUARD::QAR1(A)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Threat
        • B(D)
      • Vars
        • P(c);N_GUARD::QAR1(A)
      • Refutation
        • S(a);
    • Try
      • Q(A);
      • Vars
        • K(b);S_FLIGHT::B(D)
        • S(a);N_GUARD::QAR2(A)
        • S(a);N_GUARD::QAR2(A),XS(a)
        • P(c);SBLOCK::QAR1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Refutation
        • S(a);XQ(A)
  • Actual
    • Q(A);
    • Vars
      • K(b);S_FLIGHT::B(D)
      • S(a);N_GUARD::QAR2(A)
      • S(a);N_GUARD::QAR2(A),XS(a)
      • S(a);SBLOCK::QAB(A)
      • P(c);SBLOCK::QAR2(A)
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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).