MESON Chess Problem Database

Problem Display
PID: 108042 (R1Nn1r1r/1p1k1pN1/1K3B2/p2P2p1/8/8/3Q4/8 w - - 0 1)

Faria, Oswaldo

Belliboni MT, 1993

R1Nn1r1r/1p1k1pN1/1K3B2/p2P2p1/8/8/3Q4/8

#2

7 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sc6
      • 2.dxc6#
    • 1...Se6
      • 2.dxe6#
  • Tries
    • 1.Qb4?
      • threat
        • 2.Qd6#
        • 2.Qe7#
      • 1...Re8
        • 2.Qd6#
      • 1...Sc6
        • 2.Qd6#
        • 2.Qg4#
      • 1...axb4!
    • 1.Qf4?
      • threat
        • 2.Qd6#
        • 2.Qc7#
      • 1...Se6
        • 2.Qd6#
        • 2.Qa4#
      • 1...gxf4!
    • 1.Qe2?
      • threat
        • 2.Qe7#
      • 1...Sc6
        • 2.Qg4#
      • 1...Se6
        • 2.Qb5#
      • 1...Re8!
    • 1.Qh2?
      • threat
        • 2.Qd6#
        • 2.Qc7#
      • 1...Se6
        • 2.Qd6#
      • 1...Rxh2!
  • Keys
    • 1.Qc2!
      • threat
        • 2.Qc7#
      • 1...Sc6
        • 2.Qf5#
      • 1...Se6
        • 2.Qa4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(f);OGATE::QAR(A)+P(B)DCHECK,XS(f)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(g);::QAR1(A)
      • Refutation
        • P(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Refutation
        • P(b);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • S(f);N_GUARD::QAB(A)
      • Refutation
        • R(g);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(f);::QAR1(A)
      • Refutation
        • R(h);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • S(f);N_GUARD::QAB(A)
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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).