MESON Chess Problem Database

Problem Display
PID: 30098 (8/6Q1/3p4/4q3/N1P4B/1B1P4/2KP4/k2N4 w - - 0 1)

Mladenovic, Slobodan

Vecherni Novosti, 1969

8/6Q1/3p4/4q3/N1P4B/1B1P4/2KP4/k2N4

#2

9 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2+
      • 2.Qxb2#
    • 1...Qc3+
      • 2.Qxc3#
    • 1...Qd4
      • 2.Qxd4#
    • 1...Qf6
      • 2.Bxf6#
      • 2.Qxf6#
  • Tries
    • 1.Se3?
      • threat
        • 2.Qg1#
      • 1...Qb2+
        • 2.Qxb2#
      • 1...Qc3+
        • 2.Qxc3#
      • 1...Qf6
        • 2.Bxf6#
        • 2.Qxf6#
      • 1...Qxg7!
    • 1.Sc5?
      • threat
        • 2.Qa7#
      • 1...Qb2+
        • 2.Qxb2#
      • 1...Qc3+
        • 2.Qxc3#
      • 1...Qxg7!
    • 1.Sb6?
      • 1...Qb2+
        • 2.Qxb2#
      • 1...Qc3+
        • 2.Qxc3#
      • 1...d5
        • 2.Qa7#
      • 1...Qd4
        • 2.Qxd4#
        • 2.Qa7#
      • 1...Qf6
        • 2.Bxf6#
        • 2.Qxf6#
        • 2.Qa7#
      • 1...Qxg7!
    • 1.Bf6?
      • 1...Qb2+
        • 2.Bxb2#
      • 1...Qc3+
        • 2.Bxc3#
      • 1...Qxf6
        • 2.Qxf6#
      • 1...Qd4
        • 2.Bxd4#
      • 1...d5!
    • 1.Qf6?
      • 1...Qb2+
        • 2.Qxb2#
      • 1...Qc3+
        • 2.Qxc3#
      • 1...Qxf6
        • 2.Bxf6#
      • 1...Qd4
        • 2.Qxd4#
      • 1...d5!
    • 1.Qa7?
      • threat
        • 2.Sc5#
      • 1...Qb2+
        • 2.Saxb2#
      • 1...Qc3+
        • 2.Saxc3#
      • 1...Qg7
        • 2.Qxg7#
      • 1...Qb5
        • 2.Qd4#
      • 1...Qc5
        • 2.Sxc5#
      • 1...Qe7
        • 2.Qd4#
      • 1...Qe8
        • 2.Qd4#
      • 1...Qa5!
  • Keys
    • 1.Qg1!
      • threat
        • 2.Se3#
      • 1...Qb2+
        • 2.Sdxb2#
      • 1...Qc3+
        • 2.Sdxc3#
      • 1...Qh2
        • 2.Qd4#
      • 1...Qg3
        • 2.Qd4#
      • 1...Qf4
        • 2.Sf2#
      • 1...Qf6
        • 2.Sf2#
        • 2.Bxf6#
      • 1...Qg7
        • 2.Qxg7#
      • 1...Qe1
        • 2.Qd4#
      • 1...Qe2
        • 2.Qd4#
      • 1...Qe3
        • 2.Sxe3#
      • 1...Qf5
        • 2.Sf2#
        • 2.Qd4#
      • 1...Qg5
        • 2.Qd4#
      • 1...Qh5
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 9
    • REMOVED MATES = 1
  • Sets
    • Q(b);CHECK,OGATE::QAB1(I),XQ(b)
    • Q(b);CHECK,OGATE::QAB(I),XQ(b)
    • Q(b);OGATE::QAB(I),XQ(b)
  • Tries
    • Try
      • S(A);
      • Threat
        • QAR(I)
      • Vars
        • Q(b);CHECK,OGATE::QAB1(I),XQ(b)
        • Q(b);CHECK,OGATE::QAB(I),XQ(b)
      • Refutation
        • Q(b);N_SPINQ(b),XQ(I)
    • Try
      • S(F);
      • Threat
        • QAR(I)
      • Vars
        • Q(b);CHECK,OGATE::QAB1(I),XQ(b)
        • Q(b);CHECK,OGATE::QAB(I),XQ(b)
      • Refutation
        • Q(b);N_SPINQ(b),XQ(I)
    • Try
      • S(F);
      • Vars
        • Q(b);CHECK,OGATE::QAB1(I),XQ(b)
        • Q(b);CHECK,OGATE::QAB(I),XQ(b)
        • P(c);::QAR(I)
      • Refutation
        • Q(b);N_SPINQ(b),XQ(I)
    • Try
      • B(H);
      • Vars
        • Q(b);CHECK,OGATE::B(H),XQ(b)
        • Q(b);OGATE,XB(H)::QAB(I),XQ(b)
        • Q(b);OGATE::B(H),XQ(b)
      • Refutation
        • P(c);
    • Try
      • Q(I);
      • Vars
        • Q(b);CHECK,OGATE::QAB1(I),XQ(b)
        • Q(b);CHECK,OGATE::QAB(I),XQ(b)
        • Q(b);N_SPINQ(b),OGATE,XQ(I)::B(H),XQ(b)
        • Q(b);OGATE::QAB(I),XQ(b)
      • Refutation
        • P(c);
    • Try
      • Q(I);N_PINQ(b)
      • Threat
        • QAR(I)+S(F)
      • Vars
        • Q(b);CHECK,N_GUARD::QAR(I)+S(F),XQ(b)
        • Q(b);OGATEB::QAB(I),XQ(b)
        • Q(b);N_GUARD::QAB(I)
        • Q(b);P_PINP(G)::QAR(I)+S(F),XQ(b)
      • Refutation
        • Q(b);
  • Actual
    • Q(I);N_PINQ(b)
    • Threat
      • QAR(I)+S(A)
    • Vars
      • Q(b);CHECK,N_GUARD::QAR(I)+S(A),XQ(b)
      • Q(b);N_GUARD,P_PINP(C)::QAB(I)
      • Q(b);N_GUARD::QAB(I)
      • Q(b);N_GUARD::QAR(I)+S(A)
      • Q(b);OGATEB::QAB(I),XQ(b)
      • Q(b);::QAR(I)+S(A),XQ(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).