MESON Chess Problem Database

Problem Display
PID: 18869 (n2K4/3N4/p2Q4/k7/p2Nb3/2n3p1/1P6/4q3 w - - 0 1)

Mazel, Frantisek

Vecherni Praha, 1958

n2K4/3N4/p2Q4/k7/p2Nb3/2n3p1/1P6/4q3

#2

5 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Qc5#
    • 1...Sd1
      • 2.Qc5#
    • 1...Sa2
      • 2.Qc5#
    • 1...Se2
      • 2.Qc5#
    • 1...Sd5
      • 2.Qc5#
    • 1...Sb6
      • 2.Qxb6#
    • 1...Sc7
      • 2.Qb6#
  • Tries
    • 1.Sb3+?
      • 1...Kb5
        • 2.Qc5#
      • 1...axb3!
    • 1.Sc6+?
      • 1...Kb5
        • 2.Qc5#
      • 1...Bxc6!
    • 1.Qc7+?
      • 1...Kb4
        • 2.Qc5#
      • 1...Sb6
        • 2.Qxb6#
      • 1...Sxc7!
  • Keys
    • 1.Qa3!
      • threat
        • 2.b4#
      • 1...Qb1
        • 2.Qxc3#
      • 1...Sb1
        • 2.Qc5#
      • 1...Sd1
        • 2.Qc5#
      • 1...Sa2
        • 2.Qc5#
      • 1...Se2
        • 2.Qc5#
      • 1...Sb5
        • 2.Sb3#
      • 1...Sd5
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • S(b);N_GUARD::QAR2(C)
    • S(h);N_GUARD::QAB1(C),XS(h)
    • S(h);N_GUARD::QAB1(C)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(f);P-FLIGHT::QAR1(C)
      • Refutation
        • P(d);XS(B)
    • Try
      • S(B);CHECK
      • Vars
        • K(f);P-FLIGHT::QAR1(C)
      • Refutation
        • B(e);XS(B)
    • Try
      • Q(C);CHECK
      • Vars
        • K(f);S_FLIGHT::QAB1(C)
        • S(h);N_GUARD,P_SPINS(h)::QAB1(C),XS(h)
      • Refutation
        • S(h);XQ(C)
  • Actual
    • Q(C);P_PINP(d)
    • Threat
      • P(A)
    • Vars
      • Q(a);N_GUARD::QAB(C),XS(b)
      • S(b);N_GUARD::QAR2(C)
      • S(b);SBLOCK::S(B)
HTML5 logo

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).