MESON Chess Problem Database

Problem Display
PID: 168434 (8/2QRpn1K/2b3B1/4pPkN/1r5p/r4p1P/3N4/6B1 w - - 0 1)

Petite, Efren

Comm., Problemas, 1976

8/2QRpn1K/2b3B1/4pPkN/1r5p/r4p1P/3N4/6B1

#2

9 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...e4
      • 2.Qf4#
  • Tries
    • 1.Bc5?
      • threat
        • 2.Bxe7#
      • 1...e6
        • 2.Be7#
      • 1...Sd6!
    • 1.Rd3?
      • threat
        • 2.Qxe7#
      • 1...Rb7
        • 2.Be3#
      • 1...Bd7
        • 2.Sxf3#
      • 1...e6
        • 2.Qe7#
      • 1...Ra7!
    • 1.Rd5?
      • threat
        • 2.Qxe7#
      • 1...Ra7
        • 2.Sxf3#
      • 1...Rb7
        • 2.Se4#
      • 1...e6
        • 2.Qe7#
      • 1...Bd7!
  • Keys
    • 1.Rd4!
      • threat
        • 2.Qxe7#
      • 1...Ra7
        • 2.Be3#
      • 1...Rb7
        • 2.Rg4#
      • 1...Bd7
        • 2.Se4#
      • 1...e6
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • P(e);OGATE::QAB1(G)
  • Tries
    • Try
      • B(A);
      • Threat
        • B(A),XP(h)
      • Vars
        • P(h);::B(A)
      • Refutation
        • S(i);
    • Try
      • R(H);
      • Threat
        • QAB(G),XP(h)
      • Vars
        • R(c);N_GUARD::B(A)
        • B(g);N_GUARD::S(B),XP(b)
        • P(h);::QAB(G)
      • Refutation
        • R(a);
    • Try
      • R(H);
      • Threat
        • QAB(G),XP(h)
      • Vars
        • R(a);N_GUARD::S(B),XP(b)
        • R(c);N_GUARD::S(B)
        • P(h);::QAB(G)
      • Refutation
        • B(g);
  • Actual
    • R(H);
    • Threat
      • QAB(G),XP(h)
    • Vars
      • R(a);N_GUARD::B(A)
      • R(c);N_GUARD::R1(H)
      • B(g);N_GUARD::S(B)
      • P(h);::QAB(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).