MESON Chess Problem Database

Problem Display
PID: 263907 (8/3N1k2/5p1K/3P1pn1/5Q2/4R3/8/8 w - - 0 1)

Grassano, Carlos A

Coello-75 JT (Problemas), 2017

8/3N1k2/5p1K/3P1pn1/5Q2/4R3/8/8

#2

5 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Re7+?
      • 1...Kg8
        • 2.Qb8#
      • 1...Kxe7!
    • 1.Qe5?
      • threat
        • 2.Qe8#
      • 1...Kg8
        • 2.Qe8#
      • 1...Se6
        • 2.Qxe6#
      • 1...Se4
        • 2.Qe6#
      • 1...fxe5!
    • 1.Qb8?
      • threat
        • 2.Qe8#
        • 2.Qf8#
      • 1...Se4
        • 2.Qf8#
      • 1...Sh7
        • 2.Qe8#
      • 1...Se6!
    • 1.Qxf5?
      • threat
        • 2.Qg6#
      • 1...Se4
        • 2.Qe6#
      • 1...Se6
        • 2.Qxe6#
      • 1...Kg8!
  • Keys
    • 1.Qd6!
      • threat
        • 2.Qf8#
      • 1...Kg8
        • 2.Qf8#
      • 1...Se6
        • 2.Qxe6#
      • 1...Sh7
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(d);N_GUARD,S_FLIGHT::QAR(B)
      • Refutation
        • K(d);P-FLIGHT,XR(A)
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • K(d);S_FLIGHT::QAR2(B)
        • S(b);N_GUARD::QAB1(B),XS(b)
        • S(b);N_GUARD::QAB1(B)
      • Refutation
        • P(c);XQ(B)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);::QAR1(B)
        • S(b);::QAB1(B)
      • Refutation
        • S(b);
    • Try
      • Q(B);P_PINP(c),XP(a)
      • Threat
        • QAB1(B)
      • Vars
        • S(b);N_GUARD::QAB1(B)
        • S(b);N_GUARD::QAB1(B),XS(b)
      • Refutation
        • K(d);N_SPINP(c),S_FLIGHT
  • Actual
    • Q(B);
    • Threat
      • QAR1(B)
    • Vars
      • K(d);S_FLIGHT::QAR1(B)
      • S(b);N_GUARD::QAB1(B),XS(b)
      • S(b);N_GUARD::QAB1(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).