MESON Chess Problem Database

Problem Display
PID: 197168 (5nrb/2P1p2q/3Nk3/2R2p2/2KpNp2/B4PpQ/8/4R3 w - - 0 1)

Drese, Gerardus Hendrikus

Haagsche Post, 1930

5nrb/2P1p2q/3Nk3/2R2p2/2KpNp2/B4PpQ/8/4R3

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Kd7
      • 2.c8Q#
    • 1...Qh4
      • 2.Qxf5#
    • 1...Qh6
      • 2.Qxf5#
    • 1...Qg7
      • 2.Qxf5#
    • 1...Rg6
      • 2.Qxf5#
    • 1...Sg6
      • 2.Qxf5#
  • Tries
    • 1.Sf6+?
      • 1...Kxd6
        • 2.c8S#
      • 1...Kxf6!
  • Keys
    • 1.Rxf5!
      • threat
        • 2.Sf6#
      • 1...Kd7
        • 2.c8Q#
      • 1...Qxf5
        • 2.Qxf5#
      • 1...exd6
        • 2.Sc5#
      • 1...Be5
        • 2.Rf6#
      • 1...Bf6
        • 2.Sxf6#
      • 1...Sg6
        • 2.Rh5#
      • 1...Sd7
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • K(e);S_FLIGHT::P=Q
    • Q(g);N_GUARD::QAB1(D),XP(d)
    • R(i);S_CUTQ(g)::QAB1(D),XP(d)
    • S(h);S_CUTQ(g)::QAB1(D),XP(d)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(e);N_SPINP(d),P-FLIGHT,XS(H)::P=S
      • Refutation
        • K(e);N_SPINP(d),P-FLIGHT,XS(F)
  • Actual
    • R(G);XP(d)
    • Threat
      • R(A)+S(F)
    • Vars
      • K(e);S_FLIGHT::P=Q
      • Q(g);OGATE,P_SPINQ(g),XR(G)::QAB1(D),XQ(g)
      • P(f);SBLOCK,XS(H)::R(A)+S(F),DCHECK
      • B(j);SBLOCK::QAB(D)+R(G),DCHECK
      • B(j);::R(A)+S(F),XB(j)
      • S(h);S_CUTQ(g),S_CUTR(i)::QAB(D)+R(G)
      • S(h);SBLOCK::R(A)+S(F),DCHECK
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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).