MESON Chess Problem Database

Problem Display
PID: 10306 (2n2Q2/1p6/4p1P1/BB6/4p3/pRK1k2n/6P1/8 w - - 0 1)

Lopatinski, Evgeny

Problem (Zagreb), 1963

2n2Q2/1p6/4p1P1/BB6/4p3/pRK1k2n/6P1/8

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sf2
      • 2.Qh6#
    • 1...Sf4
      • 2.Qc5#
    • 1...Sb6
      • 2.Bxb6#
    • 1...Sd6
      • 2.Bb6#
    • 1...Sa7
      • 2.Bb6#
    • 1...Se7
      • 2.Bb6#
  • Tries
    • 1.Kb4+?
      • 1...Kd4
        • 2.Qc5#
      • 1...Kd2!
    • 1.Bf1?
      • threat
        • 2.Kc4#
      • 1...Sf4
        • 2.Qc5#
      • 1...Sf2
        • 2.Qh6#
      • 1...Sb6
        • 2.Bxb6#
      • 1...Sd6
        • 2.Bb6#
      • 1...b5!
    • 1.Rb1?
      • threat
        • 2.Re1#
      • 1...Sf4
        • 2.Qc5#
      • 1...Sg1!
    • 1.Rb2?
      • threat
        • 2.Re2#
      • 1...Sg1
        • 2.Qh6#
        • 2.Qf2#
      • 1...Sf4
        • 2.Qc5#
      • 1...axb2!
    • 1.Qf6?
      • threat
        • 2.Kc2#
      • 1...Sf4
        • 2.Qd4#
      • 1...Sf2
        • 2.Qg5#
      • 1...e5!
  • Keys
    • 1.Qf1!
      • threat
        • 2.Kc4#
      • 1...Sf2
        • 2.Qc1#
      • 1...Sf4
        • 2.Qg1#
      • 1...Sb6
        • 2.Bxb6#
      • 1...Sd6
        • 2.Bb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • S(c);N_GUARD,SBLOCK::QAB(G)
    • S(c);SBLOCK::QAB(G)
    • S(g);N_GUARD::B(D),XS(g)
    • S(g);N_GUARD::B(D)
  • Tries
    • Try
      • K(C);CHECK,S_FLIGHT
      • Vars
        • K(b);S_FLIGHT::QAB1(G)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(E);
      • Threat
        • R(B)+K(C)
      • Vars
        • S(c);SBLOCK::QAB(G)
        • S(c);N_GUARD,SBLOCK::QAB(G)
        • S(g);N_GUARD::B(D),XS(g)
        • S(g);N_GUARD::B(D)
      • Refutation
        • P(f);
    • Try
      • R(B);
      • Threat
        • R(B)
      • Vars
        • S(c);SBLOCK::QAB(G)
      • Refutation
        • S(c);
    • Try
      • R(B);
      • Threat
        • R1(B)
      • Vars
        • S(c);SBLOCK::QAB(G)
      • Refutation
        • P(a);XR(B)
    • Try
      • Q(G);
      • Threat
        • R(B)+K(C)
      • Vars
        • S(c);SBLOCK::QAB1(G)
        • S(c);N_GUARD,SBLOCK::QAB(G)
      • Refutation
        • P(e);
  • Actual
    • Q(G);
    • Threat
      • R(B)+K(C)
    • Vars
      • S(c);SBLOCK::QAB(G)
      • S(c);N_GUARD,SBLOCK::QAB(G)
      • S(g);N_GUARD::B(D),XS(g)
      • S(g);N_GUARD::B(D)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).