MESON Chess Problem Database

Problem Display
PID: 207859 (8/1nK5/5p2/3Bk3/3pPp2/6P1/1Q6/8 w - - 0 1)

Chernikh, Vassily

Zadachi i Etyudi, 2019

8/1nK5/5p2/3Bk3/3pPp2/6P1/1Q6/8

#2

5 + 5

SOLUTION

  • SOUND
  • Tries
    • 1.Qa3?
      • threat
        • 2.Qe7#
      • 1...fxg3
        • 2.Qxg3#
      • 1...d3
        • 2.Qb2#
        • 2.Qa1#
        • 2.Qc3#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sd8
        • 2.Qd6#
      • 1...Sc5!
    • 1.Qb6?
      • threat
        • 2.Qe6#
      • 1...Sc5
        • 2.Qd6#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sd8
        • 2.Qd6#
      • 1...d3
        • 2.Qb2#
      • 1...fxg3!
  • Keys
    • 1.Qh2!
      • threat
        • 2.gxf4#
      • 1...fxg3
        • 2.Qxg3#
      • 1...d3
        • 2.Qb2#
      • 1...f5
        • 2.Qh8#
      • 1...f3
        • 2.g4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);N_PINP(a)
      • Threat
        • QAR2(A)
      • Vars
        • P(b);OGATE,XP(B)::QAB(A),XP(b)
        • S(e);N_GUARD::QAB1(A),XS(e)
        • S(e);N_GUARD::QAB1(A)
      • Refutation
        • S(e);
    • Try
      • Q(A);N_PINP(a)
      • Threat
        • QAR1(A)
      • Vars
        • S(e);N_GUARD::QAB1(A)
        • S(e);N_GUARD::QAB1(A),XS(e)
        • P(a);OGATEB::QAB(A)
      • Refutation
        • P(b);XP(B)
  • Actual
    • Q(A);N_PINP(a)
    • Threat
      • P(B),XP(b)
    • Vars
      • P(b);OGATE,P_SPINP(b),XP(B)::QAB(A),XP(b)
      • P(a);OGATEB::QAB(A)
      • P(d);OGATEB::QAB(A)
      • P(b);::QAB(A)+P(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).