MESON Chess Problem Database

Problem Display
PID: 263266 (6n1/1Kp5/2Np4/2Pk1P2/1P1p1n1Q/3P4/7b/8 w - - 0 1)

Golab, Marian

Szachy, 1986

6n1/1Kp5/2Np4/2Pk1P2/1P1p1n1Q/3P4/7b/8

#2

7 + 7

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Se2
      • 2.Qe4#
    • 1...Sg2
      • 2.Qxd4#
      • 2.Qe4#
    • 1...Sxd3
      • 2.Qxd4#
    • 1...Sh3
      • 2.Qxd4#
      • 2.Qe4#
    • 1...Sh5
      • 2.Qxd4#
      • 2.Qe4#
    • 1...Se6
      • 2.Qe4#
    • 1...Sg6
      • 2.Qxd4#
      • 2.Qe4#
    • 1...dxc5
      • 2.Qd8#
  • Tries
    • 1.Qf2?
      • threat
        • 2.Qxd4#
        • 2.Qa2#
        • 2.Qf3#
      • 1...Sxd3
        • 2.Qxd4#
      • 1...Bg1
        • 2.Qa2#
        • 2.Qf3#
      • 1...Se2
        • 2.Qg2#
        • 2.Qf3#
      • 1...Se6
        • 2.Qa2#
        • 2.Qg2#
        • 2.Qf3#
      • 1...Sf6
        • 2.Qxd4#
        • 2.Qa2#
      • 1...dxc5!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Qe4#
      • 1...Sxd3
        • 2.Qe6#
      • 1...dxc5
        • 2.Qe5#
      • 1...Se2
        • 2.Qh1#
      • 1...Sf6
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • S(c);OGATE::QAB1(C)
    • S(c);OGATE,XP(A)::QAR1(C),XP(b)
    • P(e);OGATEB,XP(D)::QAR(C)
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(3)
      • Vars
        • S(c);XP(A)::QAR1(C),XP(b)
      • Refutation
        • P(e);XP(D)
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • S(c);N_GUARD,XP(A)::QAB1(C)
      • P(e);N_GUARD,XP(D)::QAR1(C)
      • S(c);N_GUARD::QAB(C)
      • S(g);N_GUARD::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).