MESON Chess Problem Database

Problem Display
PID: 276760 (4Q3/8/3p4/K1kp4/2N5/1P6/8/8 w - - 0 1)

Petrasinovic, Petrasin

Sachmatija, 2024

4Q3/8/3p4/K1kp4/2N5/1P6/8/8

#2

4 + 3

5454 Near Snap 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qe3#
    • 1...d4
      • 2.Qb5#
  • Tries
    • 1.Ka4?
      • 1...Kd4
        • 2.Qe3#
      • 1...d4
        • 2.Qb5#
      • 1...dxc4!
    • 1.Sb2?
      • 1...d4
        • 2.Qb5#
      • 1...Kd4!
    • 1.Sd2?
      • 1...d4
        • 2.Qb5#
      • 1...Kd4!
    • 1.Sa3?
      • 1...d4
        • 2.Qb5#
      • 1...Kd4!
    • 1.Se3?
      • 1...d4
        • 2.Qb5#
        • 2.Qc8#
        • 2.b4#
      • 1...Kd4!
    • 1.Sb6?
      • 1...d4
        • 2.Qb5#
        • 2.Qc8#
        • 2.b4#
      • 1...Kd4!
    • 1.Qa4?
      • 1...dxc4
        • 2.Qxc4#
      • 1...d4
        • 2.Qb5#
      • 1...Kd4!
  • Keys
    • 1.Qe6!
      • 1...Kd4
        • 2.Qe3#
      • 1...Kc6
        • 2.Qc8#
      • 1...dxc4
        • 2.Qxc4#
      • 1...d4
        • 2.Qxd6#

Anticipated by 269335(2022)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);N_GUARD,S_CUTP(b),S_FLIGHT::QAB1(D)
    • P(b);SBLOCK::QAR1(D)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(a);N_GUARD,S_CUTP(b),S_FLIGHT::QAB1(D)
        • P(b);SBLOCK::QAR1(D)
      • Refutation
        • P(b);XS(B)
    • Try
      • S(B);
      • Vars
        • P(b);SBLOCK::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(B);
      • Vars
        • P(b);SBLOCK::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(B);
      • Vars
        • P(b);SBLOCK::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(B);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(B);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);
      • Vars
        • P(b);OGATE,XS(B)::QAR1(D),XP(b)
        • P(b);SBLOCK::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(D);
    • Vars
      • K(a);N_GUARD,S_CUTP(b),S_FLIGHT::QAB1(D)
      • K(a);N_GUARD,P-FLIGHT,P_SPINP(c)::QAR2(D)
      • P(b);OGATE,XS(B)::QAR1(D),XP(b)
      • P(b);::QAB1(D),XP(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).