MESON Chess Problem Database

Problem Display
PID: 276891 (3n4/3p2p1/8/b1pQP2p/1pP3p1/4K1kP/1R4N1/7R w - - 0 1)

Myllyniemi, Matti Arvo

Stella Polaris, 1971

3n4/3p2p1/8/b1pQP2p/1pP3p1/4K1kP/1R4N1/7R

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...gxh3
      • 2.Qf3#
  • Tries
    • 1.Ke2?
      • threat
        • 2.Rb3#
      • 1...gxh3
        • 2.Qf3#
      • 1...b3!
    • 1.Qf7?
      • threat
        • 2.Qf2#
        • 2.Qf4#
      • 1...gxh3
        • 2.Qg6#
        • 2.Qf3#
        • 2.Qf4#
        • 2.Qxg7#
      • 1...Se6
        • 2.Qf2#
      • 1...g5
        • 2.Qf2#
      • 1...Sxf7!
    • 1.Qd1?
      • threat
        • 2.Qe1#
      • 1...gxh3
        • 2.Qf3#
      • 1...b3!
    • 1.Qd2?
      • threat
        • 2.Qe1#
        • 2.Qf2#
      • 1...b3
        • 2.Qf2#
      • 1...gxh3!
    • 1.Qd3?
      • threat
        • 2.Ke4#
      • 1...gxh3
        • 2.Qg6#
      • 1...d5!
  • Keys
    • 1.Rb3!
      • threat
        • 2.Ke2#
      • 1...gxh3
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • P(c);N_GUARD,XP(E)::QAR1(G)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Threat
        • R(B)
      • Vars
        • P(c);N_GUARD,XP(E)::QAR1(G)
      • Refutation
        • P(b);
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • S(i);::QAB1(G)
        • P(h);::QAB1(G)
      • Refutation
        • S(i);XQ(G)
    • Try
      • Q(G);
      • Threat
        • QAB(G)
      • Vars
        • P(c);N_GUARD,XP(E)::QAR1(G)
      • Refutation
        • P(b);
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAB1(G)
      • Refutation
        • P(c);XP(E)
    • Try
      • Q(G);
      • Threat
        • QAR(G)+K(D)
      • Vars
        • P(c);OGATEB,XP(E)::QAR(G)
      • Refutation
        • P(g);
  • Actual
    • R(B);
    • Threat
      • R(B)+K(D)
    • Vars
      • P(c);N_GUARD,XP(E)::QAR1(G)
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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).