MESON Chess Problem Database

Problem Display
PID: 252909 (b4n1r/P7/Q1pp4/1p1k2pp/8/1p1P1KP1/6B1/4R1B1 w - - 0 1)

Myllyniemi, Matti Arvo

4th HM., Schach, 1984

b4n1r/P7/Q1pp4/1p1k2pp/8/1p1P1KP1/6B1/4R1B1

#2

8 + 10

15601 Albrecht-Leiss-Degener Collection 2021
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...b2
      • 2.Qa2#
    • 1...b4
      • 2.Qc4#
    • 1...g4+
      • 2.Kf4#
    • 1...h4
      • 2.Kg4#
  • Tries
    • 1.Qc8?
      • threat
        • 2.Qf5#
      • 1...g4+
        • 2.Kf4#
      • 1...Se6
        • 2.Qxe6#
      • 1...Sg6
        • 2.Qe6#
      • 1...c5
        • 2.Qxa8#
      • 1...Sd7!
    • 1.Qa3?
      • threat
        • 2.Qxb3#
      • 1...g4+
        • 2.Kf4#
      • 1...b2
        • 2.Qa2#
        • 2.Qb3#
      • 1...c5!
    • 1.Qa4?
      • threat
        • 2.Qxb3#
        • 2.Qd4#
        • 2.Qe4#
      • 1...g4+
        • 2.Kf4#
      • 1...c5
        • 2.Kf2#
        • 2.Qe4#
      • 1...Se6
        • 2.Qxb3#
        • 2.Qe4#
      • 1...b2
        • 2.Qb3#
        • 2.Qa2#
        • 2.Qd4#
        • 2.Qe4#
      • 1...b4
        • 2.Qxb3#
      • 1...bxa4!
    • 1.Qb6?
      • threat
        • 2.Kf2#
        • 2.Qd4#
      • 1...g4+
        • 2.Kf2#
        • 2.Kf4#
      • 1...Se6
        • 2.Kf2#
      • 1...c5!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qd4#
      • 1...g4+
        • 2.Kf4#
      • 1...c5
        • 2.Kf2#
      • 1...Se6
        • 2.Ke2#
      • 1...b2
        • 2.Qa2#

Anticipated by 41918(1983)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • P(a);OGATEB::QAB(G)
    • P(b);OGATE::QAB1(G)
    • P(d);CHECK::B(C)+K(E)
    • P(e);::B(C)+K(E)
  • Tries
    • Try
      • Q(G);
      • Threat
        • QAR2(G)
      • Vars
        • P(d);CHECK::B(C)+K(E)
        • S(i);N_GUARD::QAB1(G),XS(i)
        • S(i);N_GUARD::QAB1(G)
        • P(f);OGATEB::QAB(G),XB(h)
      • Refutation
        • S(i);
    • Try
      • Q(G);
      • Threat
        • QAB(G),XP(a)
      • Vars
        • P(d);CHECK::B(C)+K(E)
      • Refutation
        • P(f);
    • Try
      • Q(G);
      • Threat
        • DUALS(3)
      • Vars
        • P(d);CHECK::B(C)+K(E)
        • P(b);::QAB(G),XP(a)
      • Refutation
        • P(b);XQ(G)
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • S(i);::B(C)+K(E)
      • Refutation
        • P(f);
  • Actual
    • Q(G);
    • Threat
      • QAR1(G)
    • Vars
      • P(d);CHECK::B(C)+K(E)
      • P(f);SBLOCK::B(C)+K(E)
      • S(i);SBLOCK::B(C)+K(E)
      • P(a);OGATEB::QAB(G)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).