MESON Chess Problem Database

Problem Display
PID: 91100 (7K/2P2p2/pp4bR/1n1k2N1/Qn6/1N2p1B1/4r3/2R2B2 w - - 0 1)

Paros, Gyorgy

Die Schwalbe, 1976

7K/2P2p2/pp4bR/1n1k2N1/Qn6/1N2p1B1/4r3/2R2B2

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sa2
      • 2.Qc4#
    • 1...Sd3
      • 2.Qc4#
    • 1...Sc6
      • 2.Qc4#
    • 1...Sa3
      • 2.Qd7#
    • 1...Sd4
      • 2.Qd7#
    • 1...Sa7
      • 2.Qd7#
    • 1...Sxc7
      • 2.Qd7#
    • 1...a5
      • 2.Qxb5#
  • Tries
    • 1.Bg2+?
      • 1...Be4
        • 2.Bxe4#
      • 1...Rxg2!
  • Keys
    • 1.c8S!
      • threat
        • 2.Sxb6#
        • 2.Se7#
      • 1...Rc2
        • 2.Se7#
      • 1...Bc2
        • 2.Sxb6#
      • 1...Sc2
        • 2.Se7#
      • 1...Sc3
        • 2.Sxb6#
      • 1...Sc6
        • 2.Sxb6#
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 8
  • Sets
    • S(c);OGATE::QAB1(E)
    • S(d);OGATE::QAR2(E)
    • S(d);OGATE,XP(H)::QAR2(E)
    • P(f);N_GUARD::QAR2(E),XS(d)
  • Tries
    • Try
      • B(B);CHECK
      • Vars
        • B(h);N_GUARD,P_SPINB(h)::B(B),XB(h)
      • Refutation
        • R(a);XB(B)
  • Actual
    • P(H);
    • Threat
      • DUALS(2)
    • Vars
      • R(a);::S(H)
      • B(h);::S(H),XP(g)
      • S(c);::S(H)
      • S(d);::S(H),XP(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).