MESON Chess Problem Database

Problem Display
PID: 81176 (5q2/8/3pNp1p/1R1PP2b/4k2K/r2pN1PB/3Q2P1/4r3 w - - 0 1)

Diot, Roger

3rd Prize, Le Courrier des Echecs, 1956

5q2/8/3pNp1p/1R1PP2b/4k2K/r2pN1PB/3Q2P1/4r3

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...dxe5
      • 2.Bf5#
    • 1...fxe5
      • 2.Rb4#
  • Tries
    • 1.Sc2?
      • threat
        • 2.Qf4#
      • 1...Kxe5
        • 2.Qf4#
      • 1...dxc2
        • 2.Qd4#
      • 1...fxe5
        • 2.Qb4#
      • 1...Rf1
        • 2.Qe3#
      • 1...Re3
        • 2.Qxe3#
      • 1...dxe5!
    • 1.Sf5?
      • threat
        • 2.Qf4#
      • 1...Kxe5
        • 2.Qf4#
      • 1...fxe5
        • 2.Qb4#
      • 1...Rf1
        • 2.Qe3#
      • 1...Re3
        • 2.Qxe3#
      • 1...dxe5!
    • 1.Qb4+?
      • 1...Kxe5
        • 2.Qd4#
        • 2.Qf4#
      • 1...Kxe3!
  • Keys
    • 1.Sd1!
      • threat
        • 2.Qf4#
      • 1...Kxe5
        • 2.Qf4#
      • 1...dxe5
        • 2.Sf2#
      • 1...fxe5
        • 2.Qb4#
      • 1...Rf1
        • 2.Qe3#
      • 1...Re3
        • 2.Qxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(f);SBLOCK,XP(I)::B(E)
    • P(g);SBLOCK,XP(I)::R(G)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAR1(A)
      • Vars
        • K(d);P-FLIGHT,XP(I)::QAB1(A)
        • P(c);OGATE,XS(C)::QAR1(A)
        • P(g);SBLOCK,XP(I)::QAR(A)
        • R(a);N_GUARD::QAR1(A)
        • R(a);N_GUARD::QAR1(A),XR(a)
      • Refutation
        • P(f);XP(I)
    • Try
      • S(C);
      • Threat
        • QAR1(A)
      • Vars
        • K(d);P-FLIGHT,XP(I)::QAB1(A)
        • P(g);SBLOCK,XP(I)::QAR(A)
        • R(a);N_GUARD::QAR1(A)
        • R(a);N_GUARD::QAR1(A),XR(a)
      • Refutation
        • P(f);XP(I)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(d);P-FLIGHT,XS(C)
  • Actual
    • S(C);
    • Threat
      • QAR1(A)
    • Vars
      • K(d);P-FLIGHT,XP(I)::QAB1(A)
      • P(f);SBLOCK,XP(I)::S(C)
      • P(g);SBLOCK,XP(I)::QAR(A)
      • R(a);N_GUARD::QAR1(A)
      • R(a);N_GUARD::QAR1(A),XR(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).