MESON Chess Problem Database

Problem Display
PID: 264820 (7Q/b6P/8/1r1n4/1p3P1K/pN1kp1R1/2R2P1p/1B5r w - - 0 1)

Jespersen, Karl Lorenz Jesper

Skakbladet, 1987

7Q/b6P/8/1r1n4/1p3P1K/pN1kp1R1/2R2P1p/1B5r

#2

9 + 9

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Rc4#
    • 1...Rc5
      • 2.Qd4#
    • 1...Rb6
      • 2.Sc5#
      • 2.Qd4#
    • 1...Bd4
      • 2.Qxd4#
    • 1...Bb8
      • 2.Qd4#
    • 1...Sb6
      • 2.Rxe3#
      • 2.Qd4#
  • Tries
    • 1.Sc1+?
      • 1...Ke4
        • 2.Rc4#
        • 2.Qe5#
      • 1...Rxc1!
    • 1.Qc8?
      • threat
        • 2.Rd2#
        • 2.Qf5#
        • 2.Qc4#
      • 1...Ke4
        • 2.Rc4#
      • 1...Rxb1
        • 2.Qf5#
        • 2.Qc4#
      • 1...Sxf4
        • 2.Rd2#
        • 2.Qc4#
      • 1...Rc5
        • 2.Qf5#
      • 1...Bd4
        • 2.Rd2#
        • 2.Qf5#
      • 1...Bc5
        • 2.Qf5#
      • 1...Sc3
        • 2.Rd2#
      • 1...Sb6
        • 2.Rd2#
        • 2.Rxe3#
      • 1...Sf6
        • 2.Rd2#
        • 2.Qc4#
      • 1...Se7
        • 2.Rd2#
        • 2.Qc4#
      • 1...Sc7!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Qg6#
      • 1...Ke4
        • 2.Rc4#
      • 1...Sxf4
        • 2.Qc4#
      • 1...Rb6
        • 2.Qxd5#
      • 1...Sc3
        • 2.Rd2#
      • 1...Sb6
        • 2.Rxe3#
      • 1...Sf6
        • 2.Qc4#
      • 1...Sc7
        • 2.Qc4#
      • 1...Se7
        • 2.Qc4#

Published posthumously.

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 3
  • Sets
    • K(d);N_GUARD,N_SPINP(e),S_FLIGHT::B(A)+R(B),DCHECK
    • R(g);S_CUTB(i)::QAR1(I)
    • B(i);N_GUARD::QAR1(I),XB(i)
    • B(i);N_GUARD::QAR1(I)
  • Tries
    • Try
      • S(D);CHECK
      • Refutation
        • R(a);XS(D)
    • Try
      • Q(I);
      • Threat
        • DUALS(3)
      • Vars
        • K(d);N_GUARD,N_SPINP(e),S_FLIGHT::B(A)+R(B),DCHECK
        • R(g);::QAB(I)
        • B(i);::QAB(I)
        • S(h);::B(A)+R(B),DCHECK
      • Refutation
        • S(h);
  • Actual
    • Q(I);
    • Threat
      • QAB(I)
    • Vars
      • K(d);N_GUARD,N_SPINP(e),S_FLIGHT::B(A)+R(B),DCHECK
      • S(h);OGATE,XP(F)::QAB1(I)
      • R(g);N_GUARD,S_CUTB(i)::QAR2(I),XS(h)
      • S(h);SBLOCK::B(A)+R(B),DCHECK
      • S(h);N_GUARD,S_CUTB(i)::R1(E),XP(e)
      • S(h);OGATE::QAB1(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).