MESON Chess Problem Database

Problem Display
PID: 267611 (2nn4/8/K4N2/2k1P3/p1r1p3/2P4Q/8/7B w - - 0 1)

Gaillard, A

Gre, Pierre

diagrammes, 1976

2nn4/8/K4N2/2k1P3/p1r1p3/2P4Q/8/7B

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Kc6
      • 2.Qxc8#
    • 1...Rxc3
      • 2.Qxc3#
    • 1...Sb7
      • 2.Qxc8#
    • 1...Sf7
      • 2.Qxc8#
    • 1...e3
      • 2.Sd7#
  • Tries
    • 1.Qd7?
      • threat
        • 2.Qb5#
        • 2.Qd5#
      • 1...Rb4
        • 2.Qd5#
      • 1...Rd4
        • 2.Qb5#
      • 1...Sb6
        • 2.Qb5#
        • 2.Qd6#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sa7
        • 2.Qd5#
        • 2.Qd6#
      • 1...Se7
        • 2.Qb5#
        • 2.Qd6#
      • 1...Sc6
        • 2.Qd5#
      • 1...Rxc3!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Qd5#
      • 1...Kc6
        • 2.Qxc4#
      • 1...Rxc3
        • 2.Qxc3#
      • 1...exd3
        • 2.Sd7#
      • 1...Rd4
        • 2.Qb5#
      • 1...Sb6
        • 2.Qd6#
      • 1...Se7
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • K(d);P-FLIGHT,P_SPINP(c),S_CUTS(f)::QAR2(C),XS(e)
    • R(b);OGATE,XP(B)::QAR2(C),XR(b)
    • S(f);N_GUARD::QAR(C),XS(e)
    • P(c);::S(F)
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);::QAR1(C)
        • S(e);N_GUARD::QAB1(C),XS(e)
        • S(f);::QAR1(C)
      • Refutation
        • R(b);XP(B)
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • K(d);N_GUARD,P-FLIGHT,P_SPINP(c)::QAR2(C),XR(b)
      • R(b);OGATE,XP(B)::QAR2(C),XR(b)
      • P(c);XQ(C)::S(F)
      • R(b);OGATE::QAR1(C)
      • S(e);N_GUARD::QAB1(C)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).