MESON Chess Problem Database

Problem Display
PID: 43031 (8/1N2pb2/4p1pB/K3kqr1/4PR2/R1N2PP1/n7/4QB2 w - - 0 1)

Wielgos, Oskar

3rd Prize, Schach-Echo, 1960

8/1N2pb2/4p1pB/K3kqr1/4PR2/R1N2PP1/n7/4QB2

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4+
      • 2.exf5#
    • 1...Kf6+
      • 2.e5#
    • 1...Qh3
      • 2.Bg7#
    • 1...Qxe4
      • 2.Bg7#
      • 2.Qxe4#
    • 1...Qg4
      • 2.Bg7#
    • 1...Sxc3
      • 2.Qxc3#
  • Tries
    • 1.Sxa2?
      • threat
        • 2.Qc3#
        • 2.Qa1#
      • 1...Kf6+
        • 2.e5#
      • 1...Qxe4
        • 2.Qxe4#
      • 1...Kd4+!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Sxa2#
      • 1...Kd4+
        • 2.Sb5#
      • 1...Kf6+
        • 2.Sd5#
      • 1...Qxe4
        • 2.Bg7#
      • 1...Sxc3
        • 2.Qxc3#
      • 1...Sc1
        • 2.Sb1#
        • 2.Sd1#
        • 2.Sa2#
        • 2.Se2#
        • 2.Sa4#
        • 2.Sb5#
        • 2.Sd5#
      • 1...Sb4
        • 2.Sb1#
        • 2.Sd1#
        • 2.Sa2#
        • 2.Se2#
        • 2.Sa4#
        • 2.Sb5#
        • 2.Sd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • K(b);CHECK,S_FLIGHT::R(H)+P(G),XQ(c)
    • K(b);CHECK,OGATE,P_SPINQ(c),S_FLIGHT::P(G)
    • Q(c);N_GUARD::B(J)
    • S(a);OGATE,XS(D)::QAB(A),XS(a)
  • Tries
    • Try
      • S(D);XS(a)
      • Threat
        • DUALS(2)
      • Vars
        • K(b);CHECK,OGATE,P_SPINQ(c),S_FLIGHT::P(G)
        • Q(c);OGATE,P_SPINQ(c),XP(G)::QAR1(A),XQ(c)
      • Refutation
        • K(b);CHECK,S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAB(A)+S(D),XS(a)
    • Vars
      • K(b);CHECK,S_FLIGHT::QAB(A)+S(D),DCHECK
      • K(b);CHECK,P_SPINQ(c),S_FLIGHT::QAB(A)+S(D),DCHECK
      • Q(c);N_GUARD,XP(G)::B(J)
      • S(a);OGATE,P_SPINS(a),XS(D)::QAB(A),XS(a)
HTML5 logo

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).