MESON Chess Problem Database

Problem Display
PID: 275615 (K7/N2N4/k4pp1/p7/1pp2p2/3Pp3/4Q2b/4B3 w - - 0 1)

Kapustin, Fedor Mikhailovich

Lyubashevsky, Leonid Abramovic

Problemist Ukraini, 2023

K7/N2N4/k4pp1/p7/1pp2p2/3Pp3/4Q2b/4B3

#2

6 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...cxd3
      • 2.Qxd3#
    • 1...c3
      • 2.d4#
  • Tries
    • 1.Qg4?
      • threat
        • 2.Qe6#
      • 1...f3
        • 2.Qxc4#
      • 1...f5
        • 2.Qxg6#
      • 1...a4!
    • 1.Qc2?
      • threat
        • 2.Qxc4#
      • 1...cxd3
        • 2.Qxd3#
        • 2.Qc4#
        • 2.Qc6#
        • 2.Qc8#
      • 1...a4
        • 2.Qxa4#
      • 1...c3!
    • 1.Qxe3?
      • threat
        • 2.Sb8#
        • 2.Qb6#
        • 2.Qe6#
      • 1...a4
        • 2.Qb6#
      • 1...Bg1
        • 2.Sb8#
      • 1...f3
        • 2.Qb6#
      • 1...fxe3!
  • Keys
    • 1.Qa2!
      • threat
        • 2.Qxc4#
      • 1...cxd3
        • 2.Qc4#
        • 2.Qe6#
      • 1...a4
        • 2.Qxa4#
      • 1...b3
        • 2.Qxa5#
      • 1...c3
        • 2.Qc4#
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • P(d);OGATE,P_SPINP(d),XP(C)::QAB(B),XP(d)
    • P(d);::QAB(B)+P(C)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • P(e);OGATE::QAB(B),XP(d)
        • P(h);OGATEB::QAR(B),XP(i)
      • Refutation
        • P(f);
    • Try
      • Q(B);
      • Threat
        • QAB(B),XP(d)
      • Vars
        • P(f);OGATEB::QAR2(B),XP(f)
      • Refutation
        • P(d);
    • Try
      • Q(B);XP(b)
      • Threat
        • DUALS(3)
      • Vars
        • P(f);::QAR1(B)
        • B(a);::S(E)
        • P(e);::QAR1(B)
      • Refutation
        • P(e);XQ(B)
  • Actual
    • Q(B);P_PINP(f)
    • Threat
      • QAB(B),XP(d)
    • Vars
      • P(f);OGATEB::QAR2(B),XP(f)
      • P(c);::QAR1(B),XP(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).