MESON Chess Problem Database

Problem Display
PID: 265953 (2Q5/1p3p2/nR1nP3/1p1kNr2/P1b2PBp/3rPP1K/3N4/B1R5 w - - 0 1)

Oltean, Gligor

3rd HM., Buletin Problemistic, 1994

2Q5/1p3p2/nR1nP3/1p1kNr2/P1b2PBp/3rPP1K/3N4/B1R5

#2

13 + 10

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Se4
      • 2.fxe4#
    • 1...Se8
      • 2.e4#
  • Tries
    • 1.Qxb7+?
      • 1...Kc5
        • 2.Sxd3#
      • 1...Kxe6
        • 2.Qxf7#
      • 1...Sxb7!
    • 1.Qc7?
      • threat
        • 2.Rxd6#
        • 2.Qxd6#
      • 1...Kxe6
        • 2.Qxf7#
      • 1...Se4
        • 2.fxe4#
      • 1...Sc8
        • 2.e4#
      • 1...Se8
        • 2.e4#
      • 1...Sxc7!
  • Keys
    • 1.Qf8!
      • threat
        • 2.Qxd6#
      • 1...Kc5
        • 2.Rxb5#
      • 1...Kxe6
        • 2.Qxf7#
      • 1...Se4
        • 2.fxe4#
      • 1...Sc8
        • 2.e4#
      • 1...Se8
        • 2.e4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(h);OGATE::P(E),XS(h)
    • S(h);N_GUARD::P(D)
  • Tries
    • Try
      • Q(M);CHECK,XP(i)
      • Vars
        • K(e);N_GUARD,P-FLIGHT,P_SPINB(b),S_CUTS(h)::S(J),XR(a)
        • K(e);OGATEB,P_SPINR(f),P_SPINS(h),S_FLIGHT,XP(L)::QAB1(M),XP(j)
      • Refutation
        • S(h);XQ(M)
    • Try
      • Q(M);
      • Threat
        • DUALS(2)
      • Vars
        • K(e);OGATEB,P_SPINR(f),P_SPINS(h),S_FLIGHT,XP(L)::QAB1(M),XP(j)
        • S(h);OGATE::P(E),XS(h)
        • S(h);N_GUARD::P(D)
      • Refutation
        • S(g);XQ(M)
  • Actual
    • Q(M);
    • Threat
      • QAR1(M),XS(h)
    • Vars
      • K(e);N_GUARD,P-FLIGHT,P_SPINB(b),P_SPINS(h),S_CUTS(g)::R1(K),XP(d)
      • K(e);OGATEB,P_SPINR(f),P_SPINS(h),S_FLIGHT,XP(L)::QAB1(M),XP(j)
      • S(h);OGATE::P(E),XS(h)
      • S(h);N_GUARD::P(D)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).