MESON Chess Problem Database

Problem Display
PID: 227954 (r3k2r/PR1npn1R/3p1B2/3Q4/8/8/8/4K3 w kq - 0 1)

Lipton, Michael

Schweizerische Schachzeitung, 1985

r3k2r/PR1npn1R/3p1B2/3Q4/8/8/8/4K3

#2

6 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Kf8
      • 2.Qxf7#
    • 1...Rd8
      • 2.Qxf7#
    • 1...e5
      • 2.Qxf7#
    • 1...0-0
      • 2.Rh8#
    • 1...0-0-0
      • 2.Qc6#
  • Keys
    • 1.Qe6!
      • threat
        • 2.Qxe7#
      • 1...Kd8
        • 2.Qxd7#
      • 1...Kf8
        • 2.Qxf7#
      • 1...0-0
        • 2.Rh8#
      • 1...0-0-0
        • 2.a8Q#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • K(f);P-FLIGHT::QAR1(B),XS(d)
    • R(e);SBLOCK::QAB1(B),XS(d)
    • P(c);::QAB1(B),XS(d)
    • K(f);0-0,P_SPINS(d)::R1(F)
    • K(f);0-0-0,OGATEB::QAR2(B)
  • Actual
    • Q(B);P_PINP(c)
    • Threat
      • QAR1(B),XP(c)
    • Vars
      • K(f);P-FLIGHT::QAR1(B),XS(b)
      • K(f);N_SPINP(c),P-FLIGHT::QAR1(B),XS(d)
      • K(f);0-0,N_SPINP(c),P_SPINS(d)::R1(F)
      • K(f);0-0-0,N_SPINP(c),OGATE,P_SPINS(b)::P=Q
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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).