MESON Chess Problem Database

Problem Display
PID: 238610 (4K3/4P3/Q7/3N1kP1/3P4/2n2p1P/4N3/2B1b1r1 w - - 0 1)

Shanshin, Valery Yurevich

Problemist Ukraini, 2018

4K3/4P3/Q7/3N1kP1/3P4/2n2p1P/4N3/2B1b1r1

#2

9 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Kf7?
      • threat
        • 2.Qe6#
        • 2.Qg6#
      • 1...Rxg5
        • 2.Qe6#
      • 1...Bd2
        • 2.Qg6#
      • 1...Ke4!
    • 1.Se3+?
      • 1...Ke4
        • 2.Qg6#
      • 1...Kxg5!
    • 1.Sdf4?
      • threat
        • 2.Qg6#
      • 1...Ke4
        • 2.Qd3#
        • 2.Qe6#
        • 2.Qg6#
      • 1...Rxg5
        • 2.Qe6#
      • 1...Kxg5!
    • 1.Sc7?
      • threat
        • 2.Qe6#
      • 1...Ke4
        • 2.Qg6#
      • 1...Bd2!
  • Keys
    • 1.Sef4!
      • threat
        • 2.Qg6#
      • 1...Ke4
        • 2.Qd3#
      • 1...Kxg5
        • 2.Qf6#
      • 1...Rxg5
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(I);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • R(b);XP(F)::QAB1(G)
        • B(a);::QAB1(G)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • S(E);CHECK
      • Vars
        • K(e);S_FLIGHT::QAB(G)
      • Refutation
        • K(e);P-FLIGHT,XP(F)
    • Try
      • S(E);
      • Threat
        • QAB1(G)
      • Vars
        • R(b);SBLOCK,XP(F)::QAB1(G)
      • Refutation
        • K(e);P-FLIGHT,XP(F)
    • Try
      • S(E);
      • Threat
        • QAB1(G)
      • Vars
        • K(e);S_FLIGHT::QAB(G)
      • Refutation
        • B(a);
  • Actual
    • S(B);
    • Threat
      • QAB1(G)
    • Vars
      • K(e);S_FLIGHT::QAB1(G)
      • K(e);P-FLIGHT,XP(F)::QAB1(G)
      • R(b);SBLOCK,XP(F)::QAB1(G)
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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).