MESON Chess Problem Database

Problem Display
PID: 43750 (1rnbN1KR/Q1P1k3/1p2pqR1/4p2p/7B/8/8/8 w - - 0 1)

Drese, Gerardus Hendrikus

De Problemist, 1930

1rnbN1KR/Q1P1k3/1p2pqR1/4p2p/7B/8/8/8

#2

7 + 9

SOLUTION

  • SOUND
  • Tries
    • 1.Bxf6+?
      • 1...Kxe8
        • 2.cxd8Q#
        • 2.cxd8R#
      • 1...Kd7!
    • 1.Qa4?
      • threat
        • 2.Bxf6#
        • 2.Rg7#
        • 2.Rh7#
      • 1...Qxh4
        • 2.Rg7#
        • 2.Rh7#
      • 1...Bxc7
        • 2.Bxf6#
      • 1...Qg5
        • 2.Bxg5#
        • 2.Rg7#
        • 2.Rh7#
      • 1...Sd6
        • 2.Bxf6#
      • 1...b5!
    • 1.cxd8R+?
      • 1...Rb7
        • 2.Bxf6#
      • 1...Sxa7
        • 2.Bxf6#
      • 1...Kxd8!
  • Keys
    • 1.Kh7!
      • threat
        • 2.Rg7#
      • 1...Kd7
        • 2.cxb8S#
      • 1...Kf7
        • 2.cxd8S#
      • 1...Bxc7
        • 2.Qxc7#
      • 1...Sd6
        • 2.c8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(A);CHECK,XQ(e)
      • Vars
        • K(f);P-FLIGHT,XS(E)::PXB(i)=Q
      • Refutation
        • K(f);P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • DUALS(3)
      • Vars
        • B(i);XP(D)::B(A),XQ(e)
        • S(h);::B(A),XQ(e)
      • Refutation
        • P(c);
    • Try
      • P(D);CHECK,XB(i)
      • Vars
        • R(g);P_SPINR(g)::B(A),XQ(e)
        • S(h);XQ(C)::B(A),XQ(e)
      • Refutation
        • K(f);S_FLIGHT,XR(D)
  • Actual
    • K(F);S_FLIGHT
    • Threat
      • R(B)
    • Vars
      • K(f);N_SPINQ(e),P-FLIGHT::PXR(g)=S
      • K(f);N_SPINQ(e),P-FLIGHT::PXB(i)=S
      • B(i);OGATE,P_SPINB(i),XP(D)::QAR2(C),XB(i)
      • S(h);OGATE::P=S
HTML5 logo

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).