MESON Chess Problem Database

Problem Display
PID: 79904 (3q1r2/3n4/1n3Np1/1K4P1/3RPk2/2p2N2/5Q1P/7B w - - 0 1)

Avner, Uri

Variantim, 2008

3q1r2/3n4/1n3Np1/1K4P1/3RPk2/2p2N2/5Q1P/7B

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...c2
      • 2.Qd2#
  • Tries
    • 1.Sd5+?
      • 1...Kg4
        • 2.Qh4#
      • 1...Sxd5!
    • 1.Sh5+?
      • 1...Kg4
        • 2.Qh4#
      • 1...gxh5!
    • 1.Rd3?
      • threat
        • 2.Qe3#
        • 2.Qg3#
        • 2.Qh4#
      • 1...Qxf6
        • 2.Qh4#
      • 1...Rxf6
        • 2.Qh4#
      • 1...Rh8
        • 2.Qe3#
        • 2.Qg3#
      • 1...Sc4
        • 2.Qg3#
        • 2.Qh4#
      • 1...Sd5
        • 2.Qg3#
        • 2.Qh4#
      • 1...Se5
        • 2.Qe3#
        • 2.Qg3#
      • 1...Sxf6!
  • Keys
    • 1.Sg4!
      • threat
        • 2.Qg3#
      • 1...Qxg5+
        • 2.Sfe5#
      • 1...Rf5+
        • 2.e5#
      • 1...Kxg4
        • 2.Qh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(a);N_GUARD::QAB(B)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • S(c);XS(I)
    • Try
      • S(I);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • P(d);XS(I)
    • Try
      • R(E);
      • Threat
        • DUALS(3)
      • Vars
        • Q(f);XS(I)::QAR2(B)
        • R(g);XS(I)::QAR2(B)
      • Refutation
        • S(e);XS(I)
  • Actual
    • S(I);
    • Threat
      • QAB1(B)
    • Vars
      • Q(f);CHECK,SBLOCK,XP(H)::QAR(B)+S(D)
      • R(g);CHECK,SBLOCK::R(E)+P(F)
      • K(b);OGATEB,P-FLIGHT,XS(I)::QAR1(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).