MESON Chess Problem Database

Problem Display
PID: 272626 (KbN3q1/5nrN/pr2p1Rn/Qb3k1p/8/4BP2/2p3R1/1B6 w - - 0 1)

Myrhaug, Alf

Schackvarlden, 1945

KbN3q1/5nrN/pr2p1Rn/Qb3k1p/8/4BP2/2p3R1/1B6

#2

9 + 12

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Se5
      • 2.R2g5#
      • 2.Rf6#
    • 1...Sg5
      • 2.R2xg5#
    • 1...Sd6
      • 2.R2g5#
    • 1...Sd8
      • 2.R2g5#
    • 1...Sh8
      • 2.R2g5#
    • 1...e5
      • 2.Se7#
  • Keys
    • 1.Rxc2!
      • threat
        • 2.Rc5#
      • 1...Ke5
        • 2.Rc5#
      • 1...Kxg6
        • 2.Rg2#
      • 1...Be5
        • 2.Rc4#
      • 1...Se5
        • 2.Rf6#
      • 1...e5
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • S(i);N_GUARD::R1(B),XS(i)
    • S(i);N_GUARD::R1(B)
    • P(g);N_SPINB(b),SBLOCK::S(I)
  • Actual
    • R(B);XP(a)
    • Threat
      • B(A)+R(B),DCHECK
    • Vars
      • K(c);P-FLIGHT::R(B)
      • K(c);N_GUARD,N_SPINB(b),S_FLIGHT,XR(F)::B(A)+R(B),DCHECK
      • B(k);N_SPINB(b),P_PINS(I),SBLOCK::B(A)+R(B)
      • S(i);N_SPINB(b),SBLOCK::R1(F)
      • P(g);N_SPINB(b),SBLOCK::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).