MESON Chess Problem Database

Problem Display
PID: 276722 (1Q2b2K/6p1/4NN1k/8/8/8/8/8 w - - 0 1)

Mlynka, Karol

1st Prize, Seven Chess Notes, 2021

1Q2b2K/6p1/4NN1k/8/8/8/8/8

#2

4 + 3

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Bg6
      • 2.Qf4#
    • 1...g6
      • 2.Qh2#
  • Tries
    • 1.Qh2+?
      • 1...Bh5
        • 2.Qxh5#
      • 1...Kg6!
    • 1.Qg3?
      • threat
        • 2.Qg5#
        • 2.Qxg7#
      • 1...g5
        • 2.Qxg5#
      • 1...Bg6
        • 2.Qf4#
        • 2.Qe3#
        • 2.Qg5#
      • 1...g6
        • 2.Qh2#
        • 2.Qh4#
        • 2.Qh3#
        • 2.Qg5#
      • 1...gxf6!
    • 1.Qf4+?
      • 1...g5
        • 2.Qxg5#
      • 1...Kg6!
    • 1.Qxe8?
      • threat
        • 2.Sg4#
        • 2.Sg8#
        • 2.Qh5#
      • 1...g6
        • 2.Qf8#
      • 1...gxf6!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Qh7#
      • 1...Bg6
        • 2.Qc1#
      • 1...g6
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • B(c);SBLOCK,S_CUTP(b)::QAB(C)
    • P(b);SBLOCK,S_CUTB(c)::QAR(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAR1(C),XB(c)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAB1(C),XP(b)
      • Refutation
        • P(b);XS(B)
    • Try
      • Q(C);CHECK
      • Vars
        • P(b);P_SPINP(b)::QAB1(C),XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);XB(c)
      • Threat
        • DUALS(3)
      • Vars
        • P(b);OGATEB,SBLOCK::QAB(C)
      • Refutation
        • P(b);XS(B)
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • B(c);SBLOCK,S_CUTP(b)::QAB(C)
      • P(b);SBLOCK,S_CUTB(c)::QAR(C)
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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).