MESON Chess Problem Database

Problem Display
PID: 235104 (qn2k2r/3p3p/1QpP3P/2p1N1N1/5R2/p4KR1/8/8 w - - 0 1)

Shanshin, Valery Yurevich

64 Shakhmatnoe obozrenie, 2018

qn2k2r/3p3p/1QpP3P/2p1N1N1/5R2/p4KR1/8/8

#2

8 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qa4
      • 2.Qxb8#
  • Tries
    • 1.Sg6?
      • threat
        • 2.Re4#
      • 1...Qa4
        • 2.Qxb8#
      • 1...Rf8
        • 2.Rxf8#
      • 1...hxg6!
    • 1.Se6?
      • threat
        • 2.Sg7#
        • 2.Qd8#
      • 1...Qa5
        • 2.Sg7#
      • 1...Rg8
        • 2.Rxg8#
        • 2.Qd8#
      • 1...Sa6
        • 2.Sg7#
      • 1...dxe6!
    • 1.Rf8+?
      • 1...Kxf8
        • 2.Qd8#
      • 1...Rxf8+!
  • Keys
    • 1.Re4!
      • threat
        • 2.Sg6#
      • 1...Rf8+
        • 2.Sef7#
      • 1...Kf8
        • 2.Qd8#
      • 1...Qa4
        • 2.Qxb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(f);N_GUARD::QAR(F),XS(g)
  • Tries
    • Try
      • S(D);
      • Threat
        • R(C)
      • Vars
        • Q(f);N_GUARD::QAR(F),XS(g)
        • R(i);N_GUARD,P_PINR(C)::R1(C),XR(i)
      • Refutation
        • P(e);XS(D)
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • Q(f);::S(E)
        • S(g);::S(E)
      • Refutation
        • P(d);XS(E)
    • Try
      • R(C);CHECK
      • Vars
        • K(h);P-FLIGHT,XR(C)::QAR2(F)
      • Refutation
        • R(i);CHECK,XR(C)
  • Actual
    • R(C);
    • Threat
      • R(C)+S(D)
    • Vars
      • R(i);CHECK,SBLOCK::R(C)+S(D)
      • K(h);P-FLIGHT::QAR2(F)
      • Q(f);N_GUARD::QAR(F),XS(g)
HTML5 logo

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).