MESON Chess Problem Database

Problem Display
PID: 103265 (6B1/8/3B4/p1P2PK1/1p1kP3/4R3/2q1p1N1/4Q3 w - - 0 1)

Marandiuk, Mikhail Nazarovich

Festival Oessaa, 1984

6B1/8/3B4/p1P2PK1/1p1kP3/4R3/2q1p1N1/4Q3

#2

9 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qa4
      • 2.Qd2#
    • 1...Qxe4
      • 2.Qa1#
    • 1...Qd2
      • 2.Qxd2#
    • 1...Qxc5
      • 2.Qd2#
  • Tries
    • 1.Qd2+?
      • 1...Qd3
        • 2.Qxd3#
      • 1...Qxd2!
    • 1.Qxb4+?
      • 1...Qc4
        • 2.Qxc4#
      • 1...axb4!
    • 1.Qa1+?
      • 1...Qb2
        • 2.Qxb2#
      • 1...Qc3!
    • 1.Qh1?
      • threat
        • 2.Qh8#
      • 1...Qxe4
        • 2.Qa1#
      • 1...Qxc5!
  • Keys
    • 1.Qh4!
      • threat
        • 2.Qh8#
      • 1...Qxe4
        • 2.Qxe4#
      • 1...Qxc5
        • 2.e5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • Q(a);N_GUARD::QAR2(A)
    • Q(a);N_GUARD,XP(D)::QAB(A)
    • Q(a);N_GUARD,P_PINR(C)::QAR2(A),XQ(a)
    • Q(a);N_GUARD,P_PINP(F),XP(E)::QAR2(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::QAR1(A),XQ(a)
      • Refutation
        • Q(a);P_PINR(C),XQ(A)
    • Try
      • Q(A);CHECK,XP(c)
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::QAR1(A),XQ(a)
      • Refutation
        • P(e);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::QAB(A),XQ(a)
      • Refutation
        • Q(a);P_SPINQ(a)
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • Q(a);N_GUARD,XP(D)::QAB(A)
      • Refutation
        • Q(a);P_PINP(F),XP(E)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • Q(a);OGATE,P_SPINQ(a),XP(D)::QAR1(A),XQ(a)
      • Q(a);N_GUARD,P_PINP(F),XP(E)::QAR(A)+P(D)
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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).