MESON Chess Problem Database

Problem Display
PID: 80404 (8/7p/KQ2N2k/p5RP/6P1/1p1PR3/7q/2B5 w - - 0 1)

Drese, Gerardus Hendrikus

Elk Wat Wils Wedstrijd, 1936

8/7p/KQ2N2k/p5RP/6P1/1p1PR3/7q/2B5

#2

9 + 5

6426 Probleemcomponisten V - G H Drese 1947

SOLUTION

  • SOUND
  • Tries
    • 1.Sd8+?
      • 1...Qd6
        • 2.Sf7#
      • 1...Kxg5!
    • 1.Ree5?
      • threat
        • 2.Sd4#
        • 2.Sf4#
        • 2.Sc5#
        • 2.Sc7#
        • 2.Sg7#
        • 2.Sd8#
        • 2.Sf8#
        • 2.Rg6#
      • 1...Qxe5
        • 2.Rxe5#
        • 2.Rg6#
      • 1...Qg1
        • 2.Sd4#
        • 2.Sc5#
        • 2.Rg6#
      • 1...Qf4
        • 2.Sxf4#
      • 1...Qh1
        • 2.Rg6#
      • 1...Qc2
        • 2.Sc5#
        • 2.Rg6#
      • 1...Qd2
        • 2.Sd4#
        • 2.Sf4#
        • 2.Sc5#
        • 2.Sc7#
        • 2.Sg7#
        • 2.Sd8#
        • 2.Sf8#
      • 1...Qf2
        • 2.Rg6#
      • 1...Qg2
        • 2.Rg6#
      • 1...Qxh5!
  • Keys
    • 1.Rg8!
      • threat
        • 2.Sf4#
      • 1...Qxh5
        • 2.Rh3#
      • 1...Qf4
        • 2.Sxf4#
      • 1...Qe5
        • 2.Rxe5#
      • 1...Qd6
        • 2.Re5#
      • 1...Qc7
        • 2.Sxc7#
      • 1...Qb8
        • 2.Re5#
      • 1...Qh1
        • 2.Re1#
      • 1...Qb2
        • 2.Sd4#
      • 1...Qc2
        • 2.Sc5#
      • 1...Qg2
        • 2.Re2#
      • 1...Qh4
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • Q(a);P_PINQ(H),P_SPINQ(a)::S(I)
      • Refutation
        • K(d);S_FLIGHT,XR(E)
    • Try
      • R(C);
      • Threat
        • DUALS(8)
      • Vars
        • Q(a);::QAR(H)+S(I),XQ(a)
        • Q(a);::B(A)+R(E),DCHECK
      • Refutation
        • Q(a);XP(F)
  • Actual
    • R(E);
    • Threat
      • QAR(H)+S(I)
    • Vars
      • Q(a);N_GUARD,XP(F)::B(A)+R(C)
      • Q(a);::QAR(H)+S(I),XQ(a)
      • Q(a);N_GUARD::B(A)+R(C),XQ(a)
      • Q(a);N_GUARD,P_PINQ(H)::B(A)+R(C)
      • Q(a);N_GUARD::QAR(H)+S(I),XQ(a)
      • Q(a);N_GUARD::B(A)+R(C)
      • Q(a);N_GUARD::QAR(H)+S(I)
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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).