MESON Chess Problem Database

Problem Display
PID: 243740 (2B2R2/1Q1pBbN1/2r5/4p3/1np1k2p/2P1N3/3KP3/5R2 w - - 0 1)

Berg, Wolfgang

Sachsische Zeitung, 1980

2B2R2/1Q1pBbN1/2r5/4p3/1np1k2p/2P1N3/3KP3/5R2

#2

10 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sa2
      • 2.Qb1#
    • 1...Sd5
      • 2.Qb1#
    • 1...Sa6
      • 2.Qb1#
    • 1...d5
      • 2.Bf5#
    • 1...d6
      • 2.Bf5#
  • Tries
    • 1.Qxc6+?
      • 1...Bd5
        • 2.Qg6#
      • 1...Sd5
        • 2.Qxc4#
      • 1...dxc6
        • 2.Bf5#
      • 1...d5
        • 2.Bf5#
      • 1...Sxc6!
  • Keys
    • 1.Sg4!
      • threat
        • 2.Sf6#
      • 1...Kd5
        • 2.Sf6#
      • 1...Bd5
        • 2.Sf2#
      • 1...Sd5
        • 2.Qb1#
      • 1...d5
        • 2.Bf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • S(a);OGATE::QAB(F)
    • S(a);N_SPINR(f),OGATE::QAB(F)
    • P(g);N_SPINR(f),OGATE::B(I)
    • P(g);OGATE::B(I)
  • Tries
    • Try
      • Q(F);CHECK,XR(f)
      • Vars
        • B(h);N_GUARD,P_SPINB(h)::QAB(F)
        • S(a);P_SPINS(a),S_CUTB(h)::QAR2(F),XP(b)
        • P(g);OGATE,XQ(F)::B(I)
        • P(g);OGATE,P_SPINP(g)::B(I)
      • Refutation
        • S(a);XQ(F)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • K(c);S_FLIGHT::S(E)
      • B(h);N_SPINR(f),SBLOCK::S(E)
      • S(a);N_SPINR(f),OGATE,SBLOCK::QAB(F)
      • P(g);N_SPINR(f),OGATE,SBLOCK::B(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).