MESON Chess Problem Database

Problem Display
PID: 250584 (8/3Np3/2pp3N/R1p3p1/1pBPk1r1/1K4nQ/1P5n/2BR4 w - - 0 1)

Zuger, Beat

Schweizerische Schachzeitung, 1997

8/3Np3/2pp3N/R1p3p1/1pBPk1r1/1K4nQ/1P5n/2BR4

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Shf1
      • 2.Qg2#
      • 2.Qxg4#
    • 1...Sf3
      • 2.Qxg4#
    • 1...Sgf1
      • 2.Qd3#
    • 1...Sh1
      • 2.Qd3#
      • 2.Qe3#
    • 1...Se2
      • 2.Qd3#
      • 2.Qe3#
    • 1...Sf5
      • 2.Qd3#
    • 1...Sh5
      • 2.Qd3#
      • 2.Qe3#
  • Tries
    • 1.Qxg3?
      • threat
        • 2.Qd3#
        • 2.Qe3#
      • 1...cxd4
        • 2.Bd3#
        • 2.Re1#
        • 2.Qd3#
      • 1...Sf1
        • 2.Qd3#
        • 2.Qxg4#
      • 1...Sf3
        • 2.Qxg4#
      • 1...Rxg3+!
  • Keys
    • 1.Qg2+!
      • 1...Sf3
        • 2.Qc2#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • S(a);N_GUARD::QAR2(E),XR(e)
    • S(b);OGATE::QAB1(E)
  • Tries
    • Try
      • Q(E);XS(b)
      • Threat
        • DUALS(2)
      • Vars
        • S(a);N_GUARD::QAR2(E),XR(e)
      • Refutation
        • R(e);CHECK,XQ(E)
  • Actual
    • Q(E);CHECK
    • Vars
      • S(a);P_SPINS(a),SBLOCK::QAB(E)
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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).