MESON Chess Problem Database

Problem Display
PID: 46505 (8/8/8/2QK4/8/4R3/2pk2N1/3N4 w - - 0 1)

Fossum, Andre Ferdinand

1st Prize, Norsk Vanforetidsskrift, 1951

8/8/8/2QK4/8/4R3/2pk2N1/3N4

#2

5 + 2

4884 154 norske miniatyrproblemer 1974
259 Thema Danicum 1976
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...cxd1Q
      • 2.Qc3#
    • 1...cxd1B
      • 2.Qc3#
    • 1...cxd1R
      • 2.Qc3#
  • Tries
    • 1.Re2+?
      • 1...Kc1
        • 2.Qxc2#
      • 1...Kxd1
        • 2.Qxc2#
      • 1...Kd3
        • 2.Sf4#
        • 2.Qe3#
        • 2.Qxc2#
        • 2.Qc4#
        • 2.Qb5#
      • 1...Kxe2!
    • 1.Qb4+?
      • 1...Kxd1
        • 2.Re1#
        • 2.Qe1#
      • 1...Kc1!
    • 1.Qc3+?
      • 1...Kxd1
        • 2.Re1#
        • 2.Qe1#
      • 1...Kc1!
    • 1.Qa5+?
      • 1...Kxd1
        • 2.Re1#
        • 2.Qe1#
      • 1...Kc1!
  • Keys
    • 1.Se1!
      • threat
        • 2.Qxc2#
      • 1...Kc1
        • 2.Qxc2#
      • 1...Kxd1
        • 2.Qxc2#
      • 1...cxd1Q
        • 2.Qc3#
      • 1...cxd1S
        • 2.Sf3#
      • 1...cxd1B
        • 2.Qc3#
      • 1...cxd1R
        • 2.Sf3#
        • 2.Qc3#
      • 1...c1Q
        • 2.Qd4#
      • 1...c1S
        • 2.Qc2#
      • 1...c1B
        • 2.Qd4#
        • 2.Qc2#
      • 1...c1R
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • P(a);SBLOCK,XS(A)::QAB1(D)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT::QAR1(D),XP(a)
        • K(b);P-FLIGHT,XS(A)::QAB1(D),XP(a)
      • Refutation
        • K(b);P-FLIGHT,XR(C)
    • Try
      • Q(D);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(D);CHECK
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • Q(D);CHECK
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(B);
    • Threat
      • QAR1(D),XP(a)
    • Vars
      • K(b);P_SPINP(a),S_FLIGHT::QAR1(D),XP(a)
      • K(b);P-FLIGHT,XS(A)::QAB1(D),XP(a)
      • P(a);SBLOCK,XS(A)::QAB1(D)
      • P(a);SBLOCK,XS(A)::S(B)
      • P(a);SBLOCK::QAR2(D)
      • P(a);::QAR1(D)
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).