MESON Chess Problem Database

Problem Display
PID: 229336 (8/3pp3/1p1kpn2/6Q1/4P3/3p4/3N4/2R2K2 w - - 0 1)

Aliovsadzade, Rauf Gadzhiaga ogli

Chernyavsky, Mykola Vasilovich

The Problemist Supplement, 2020

8/3pp3/1p1kpn2/6Q1/4P3/3p4/3N4/2R2K2

#2

5 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sxe4
      • 2.Sxe4#
    • 1...Sd5
      • 2.e5#
    • 1...b5
      • 2.Qc5#
  • Tries
    • 1.Sf3?
      • threat
        • 2.Qe5#
      • 1...e5
        • 2.Qxe5#
      • 1...Sg4!
    • 1.Rc8?
      • threat
        • 2.Sc4#
      • 1...b5
        • 2.Qc5#
      • 1...e5!
  • Keys
    • 1.Qe3!
      • 1...Ke5
        • 2.Sc4#
      • 1...Sxe4
        • 2.Qd4#
      • 1...Sg4
        • 2.Qd4#
      • 1...Sd5
        • 2.e5#
      • 1...Sh5
        • 2.Qd4#
      • 1...Sh7
        • 2.Qd4#
      • 1...Se8
        • 2.Qd4#
      • 1...Sg8
        • 2.Qd4#
      • 1...b5
        • 2.Qc5#
      • 1...e5
        • 2.Qxb6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • S(e);XP(D)::S(C),XS(e)
    • S(e);SBLOCK::P(D)
    • P(b);N_GUARD::QAB1(E)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAB1(E)
      • Vars
        • P(d);::QAB1(E),XP(d)
      • Refutation
        • S(e);
    • Try
      • R(A);
      • Threat
        • S(C)
      • Vars
        • P(b);N_GUARD::QAB1(E)
      • Refutation
        • P(d);
  • Actual
    • Q(E);
    • Vars
      • K(c);S_FLIGHT::S(C)
      • S(e);N_GUARD,XP(D)::QAR2(E)
      • S(e);N_GUARD::QAR2(E)
      • S(e);SBLOCK::P(D)
      • P(b);N_GUARD::QAB1(E)
      • P(d);SBLOCK::QAR2(E),XP(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).