MESON Chess Problem Database

Problem Display
PID: 274087 (2bB2Q1/pp3p1r/1p2k1P1/1PpN4/2BPN1p1/3KR1b1/8/8 w - - 0 1)

Willemsens, Luis Cornelis

2nd Prize, Zurcher Woche, 1959

2bB2Q1/pp3p1r/1p2k1P1/1PpN4/2BPN1p1/3KR1b1/8/8

#2

10 + 10

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Sxg3#
    • 1...Kd7
      • 2.Sdf6#
    • 1...Rh1
      • 2.Qxf7#
    • 1...Rh2
      • 2.Qxf7#
    • 1...Rh3
      • 2.Qxf7#
    • 1...Rh4
      • 2.Qxf7#
    • 1...Rh5
      • 2.Qxf7#
    • 1...Rh6
      • 2.Qxf7#
    • 1...Rh8
      • 2.Qxf7#
    • 1...Bd7
      • 2.Se7#
  • Tries
    • 1.Sxc5+?
      • 1...Kd6
        • 2.Bc7#
        • 2.Be7#
        • 2.Qf8#
      • 1...Kf5!
    • 1.Sc7+?
      • 1...Kd7
        • 2.Qe8#
      • 1...Kf5!
  • Keys
    • 1.Bc7!
      • threat
        • 2.Qxc8#
      • 1...Kf5
        • 2.Se7#
      • 1...Kd7
        • 2.Sef6#
      • 1...Rh8
        • 2.Qxf7#
      • 1...Bd7
        • 2.Sxg3#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 6
  • Sets
    • K(e);N_GUARD,N_SPINP(h),S_FLIGHT::S(E),XB(a)
    • K(e);N_GUARD,N_SPINP(h),S_FLIGHT::S(G)
    • R(i);N_GUARD::QAB1(J),XP(h)
    • B(j);SBLOCK::B(C)+S(G)
  • Tries
    • Try
      • S(E);CHECK,XP(c)
      • Refutation
        • K(e);N_SPINP(h),S_FLIGHT
    • Try
      • S(G);CHECK
      • Vars
        • K(e);N_GUARD,N_SPINP(h),S_FLIGHT::QAB1(J)
      • Refutation
        • K(e);N_SPINP(h),S_FLIGHT
  • Actual
    • B(I);
    • Threat
      • QAB(J),XB(j)
    • Vars
      • K(e);N_GUARD,N_SPINP(h),S_FLIGHT::S(G)
      • K(e);N_GUARD,N_SPINP(h),S_CUTB(a),S_FLIGHT::S(E)
      • R(i);N_GUARD::QAB1(J),XP(h)
      • B(j);SBLOCK::R(B)+S(E),XB(a)
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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).