MESON Chess Problem Database

Problem Display
PID: 235694 (1B6/3p4/2p5/3k2N1/1Ppp4/8/6K1/6Q1 w - - 0 1)

Makaronets, Leonid

Mat, 1973

1B6/3p4/2p5/3k2N1/1Ppp4/8/6K1/6Q1

#2

5 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...d3
      • 2.Qc5#
  • Tries
    • 1.Qh2?
      • threat
        • 2.Qe5#
        • 2.Qd6#
      • 1...c5
        • 2.Qd6#
      • 1...d6
        • 2.Qxd6#
      • 1...c3!
    • 1.Qa1?
      • 1...c3
        • 2.Qa2#
      • 1...c5
        • 2.Qa8#
      • 1...d3
        • 2.Qe5#
      • 1...d6!
    • 1.Qb1?
      • threat
        • 2.Qe4#
        • 2.Qf5#
      • 1...c3
        • 2.Qa2#
        • 2.Qb3#
      • 1...c5
        • 2.Qe4#
      • 1...d3!
    • 1.Qe1?
      • threat
        • 2.Qe4#
        • 2.Qe5#
      • 1...c5
        • 2.Qe4#
      • 1...d6
        • 2.Qe4#
        • 2.Qe6#
      • 1...c3!
    • 1.Qf1?
      • threat
        • 2.Qf3#
        • 2.Qf5#
        • 2.Qf7#
      • 1...c5
        • 2.Qf3#
      • 1...d6
        • 2.Qf5#
      • 1...c3
        • 2.Qf7#
      • 1...d3!
  • Keys
    • 1.Qf2!
      • threat
        • 2.Qf3#
        • 2.Qf5#
        • 2.Qf7#
      • 1...c3
        • 2.Qa2#
        • 2.Qf7#
      • 1...c5
        • 2.Qf3#
      • 1...d6
        • 2.Qf5#
      • 1...d3
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATE::QAR1(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(d);::QAR1(A)
        • P(e);::QAR1(A),XP(e)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • P(a);OGATEB::QAB(A)
        • P(d);OGATEB::QAB(A)
        • P(b);OGATE::QAR1(A)
      • Refutation
        • P(e);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(d);::QAB1(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(d);::QAB1(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • P(d);::QAB(A)
        • P(e);::QAR2(A)
        • P(a);::QAB(A)
      • Refutation
        • P(b);
  • Actual
    • Q(A);
    • Threat
      • DUALS(3)
    • Vars
      • P(d);::QAB(A)
      • P(e);::QAR2(A)
      • P(b);OGATE::QAR1(A)
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).