MESON Chess Problem Database

Problem Display
PID: 200443 (1B6/8/4Q3/5Np1/4n3/5kP1/R1b5/1N2K2R w K - 0 1)

Szoghy, Jozsef

2nd Sp. HM., Suomen Shakki, 1976

1B6/8/4Q3/5Np1/4n3/5kP1/R1b5/1N2K2R

#2

8 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kg2
      • 2.Qxe4#
    • 1...Kg4
      • 2.Sd4#
    • 1...Sd2
      • 2.Qe2#
    • 1...Sc5
      • 2.Qe2#
    • 1...Sd6
      • 2.Qe2#
    • 1...Sf6
      • 2.Qe2#
  • Tries
    • 1.Sd2+?
      • 1...Kg4
        • 2.Se3#
        • 2.Sd4#
        • 2.Sh6#
        • 2.Se7#
        • 2.Sg7#
      • 1...Sxd2
        • 2.Qe2#
      • 1...Kg2!
    • 1.Sd4+?
      • 1...Kg2
        • 2.Qh3#
        • 2.Qxe4#
      • 1...Ke3!
  • Keys
    • 1.0-0+!
      • 1...Ke2
        • 2.Qc4#
        • 2.Qxe4#
        • 2.Qa6#
      • 1...Kg4
        • 2.Sg7#
      • 1...Sf2
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • K(b);P_SPINB(a),S_FLIGHT::QAB(G),XS(c)
    • K(b);S_FLIGHT::QAB(G)+S(F)
    • S(c);OGATE::QAB1(G)
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • S(c);OGATE,XS(A)::QAB1(G)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(F);CHECK
      • Refutation
        • K(b);P-FLIGHT,P_SPINS(c)
  • Actual
    • K(B);0-0,CHECK
    • Vars
      • K(b);S_FLIGHT::QAB(G)+S(F)
      • S(c);P_SPINS(c)::S(F)
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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).