MESON Chess Problem Database

Problem Display
PID: 235796 (5B2/2p3K1/2N4R/r2kNB2/r2P2p1/8/2p1n1q1/2Q1R3 w - - 0 1)

Shanshin, Valery Yurevich

Variantim, 2016

5B2/2p3K1/2N4R/r2kNB2/r2P2p1/8/2p1n1q1/2Q1R3

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Be6#
    • 1...Sxc1
      • 2.Be6#
    • 1...Sg1
      • 2.Be6#
    • 1...Sc3
      • 2.Be6#
    • 1...Sg3
      • 2.Be6#
  • Tries
    • 1.Qe3?
      • threat
        • 2.Se7#
        • 2.Be6#
      • 1...Rxd4
        • 2.Be6#
      • 1...Sf4
        • 2.Se7#
      • 1...Sxd4!
    • 1.Qxc2?
      • threat
        • 2.Be6#
      • 1...Sxd4
        • 2.Se7#
      • 1...Sf4!
  • Keys
    • 1.Qd2!
      • threat
        • 2.Se7#
      • 1...Rxd4
        • 2.Qxa5#
      • 1...Sxd4
        • 2.Be6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(c);SBLOCK::B(E)
    • S(b);XQ(A)::B(E)
    • S(b);::B(E)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(d);XP(C)::B(E)
        • S(b);::S(F)
      • Refutation
        • S(b);XP(C)
    • Try
      • Q(A);XP(a)
      • Threat
        • B(E)
      • Vars
        • S(b);SBLOCK,XP(C)::S(F)
      • Refutation
        • S(b);
  • Actual
    • Q(A);
    • Threat
      • S(F)
    • Vars
      • R(d);N_GUARD,P_SPINR(d),XP(C)::QAR(A),XR(f)
      • S(b);P_SPINS(b),XP(C)::B(E)
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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).