MESON Chess Problem Database

Problem Display
PID: 214947 (8/2K5/3ppp2/2RpkpR1/3ppp2/8/8/5N1Q w - - 0 1)

Iborra Yperez de Sario, Jose

SEPA, 1942

8/2K5/3ppp2/2RpkpR1/3ppp2/8/8/5N1Q

#2

5 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...f3
      • 2.Qh2#
    • 1...fxg5
      • 2.Qh8#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Sc4#
        • 2.Qxe4#
      • 1...fxg5
        • 2.Qh8#
      • 1...d3
        • 2.Qxe4#
        • 2.Qa1#
      • 1...f3
        • 2.Qh2#
      • 1...e3
        • 2.Sc4#
        • 2.Qe4#
      • 1...dxc5!
    • 1.Rxf5+?
      • 1...Kxf5
        • 2.Qh5#
      • 1...exf5!
  • Keys
    • 1.Se3!
      • threat
        • 2.Sc4#
        • 2.Sg4#
      • 1...dxe3
        • 2.Qa1#
      • 1...fxe3
        • 2.Qh2#
      • 1...dxc5
        • 2.Sg4#
      • 1...fxg5
        • 2.Qh8#
      • 1...d3
        • 2.Qa1#
      • 1...f3
        • 2.Qh2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATEB::QAB(B)
    • P(i);OGATEB,XR(D)::QAB(B)
  • Tries
    • Try
      • S(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(i);OGATEB,XR(D)::QAB(B)
        • P(c);OGATEB::QAB(B)
      • Refutation
        • P(g);N_SPINP(d),P_SPINP(f),XR(C)
    • Try
      • R(D);CHECK,XP(f)
      • Vars
        • K(e);P-FLIGHT,XR(D)::QAR2(B)
      • Refutation
        • P(h);XR(D)
  • Actual
    • S(A);
    • Threat
      • DUALS(2)
    • Vars
      • P(a);OGATEB,XS(A)::QAB(B)
      • P(c);OGATEB,XS(A)::QAB(B)
      • P(g);N_SPINP(d),P_SPINP(f),XR(C)::S(A)
      • P(i);OGATEB,XR(D)::QAB(B)
      • P(a);OGATEB::QAB(B)
      • P(c);OGATEB::QAB(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).