MESON Chess Problem Database

Problem Display
PID: 80248 (6B1/5r2/pR3p2/Rb1k4/6N1/1PpnP1N1/1bP1Q1P1/5K2 w - - 0 1)

Heeres, JG

4th Prize, Pat TT, 1938

6B1/5r2/pR3p2/Rb1k4/6N1/1PpnP1N1/1bP1Q1P1/5K2

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Qc4#
    • 1...Se1
      • 2.Qc4#
    • 1...Sf2
      • 2.Qc4#
    • 1...Sb4
      • 2.Qc4#
    • 1...Sf4
      • 2.Qc4#
  • Tries
    • 1.Sxf6+?
      • 1...Ke5
        • 2.Qh5#
      • 1...Kc5!
    • 1.Raxb5+?
      • 1...Sc5
        • 2.Bxf7#
        • 2.Qd1#
        • 2.Qd3#
        • 2.Qf3#
        • 2.Qc4#
      • 1...axb5!
    • 1.e4+?
      • 1...Kd4
        • 2.Qe3#
      • 1...Kc5!
  • Keys
    • 1.Se4!
      • threat
        • 2.Qxd3#
      • 1...Kxe4
        • 2.Qf3#
      • 1...Sc1
        • 2.Qc4#
      • 1...Se1
        • 2.Qc4#
      • 1...Sf2
        • 2.Qc4#
      • 1...Sb4
        • 2.Qc4#
      • 1...Sf4
        • 2.Qc4#
      • 1...Sc5
        • 2.Sexf6#
      • 1...Se5
        • 2.Sgxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(c);OGATE,P_PINQ(C)::QAB1(C)
  • Tries
    • Try
      • S(H);CHECK,P_SPINS(H),XP(g)
      • Vars
        • K(e);N_SPINR(h),P-FLIGHT::QAR(C)
      • Refutation
        • K(e);N_SPINR(h),P-FLIGHT
    • Try
      • R(I);CHECK,XB(d)
      • Refutation
        • P(f);XR(I)
    • Try
      • P(F);CHECK
      • Vars
        • K(e);N_SPINB(d),N_SPINR(h),P-FLIGHT::QAB1(C)
      • Refutation
        • K(e);N_SPINR(h),P-FLIGHT
  • Actual
    • S(G);
    • Threat
      • QAR2(C),XS(c)
    • Vars
      • K(e);N_SPINB(d),N_SPINR(h),OGATEB,S_FLIGHT,XS(G)::QAB1(C)
      • S(c);OGATE,P_PINQ(C)::QAB1(C)
      • S(c);N_SPINB(d),P_PINQ(C),SBLOCK::S(G),XP(g)
      • S(c);P_PINQ(C),SBLOCK::S(H),XP(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).