MESON Chess Problem Database

Problem Display
PID: 120094 (3k1N2/K2P3n/p1P5/bb6/pB1Q4/1qpp4/8/8 w - - 0 1)

Pituk, Alexander

Ruch, 1948

3k1N2/K2P3n/p1P5/bb6/pB1Q4/1qpp4/8/8

#2

6 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Se6#
    • 1...Qc2
      • 2.Se6#
    • 1...Qe6
      • 2.Sxe6#
    • 1...Qb1
      • 2.Se6#
    • 1...Qb2
      • 2.Se6#
    • 1...Qa3
      • 2.Se6#
    • 1...Bb6+
      • 2.Qxb6#
  • Tries
    • 1.Be7+?
      • 1...Kc7
        • 2.Qd6#
      • 1...Kxe7!
    • 1.Qf6+?
      • 1...Kc7
        • 2.Bxa5#
        • 2.d8Q#
      • 1...Sxf6!
    • 1.Qd6?
      • threat
        • 2.Bxa5#
        • 2.Qb8#
      • 1...Qxb4
        • 2.Se6#
      • 1...Bxb4
        • 2.c7#
      • 1...Bxc6
        • 2.Qb8#
      • 1...Bc7
        • 2.Qe7#
      • 1...Bc4
        • 2.Qb8#
      • 1...Bb6+!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Bxa5#
      • 1...Bb6+
        • 2.Qxb6#
      • 1...Kc7
        • 2.Bxa5#
      • 1...Qxb4
        • 2.Se6#
      • 1...Bxb4
        • 2.c7#
      • 1...Bxc6
        • 2.Qxa5#
      • 1...Bc7
        • 2.Qe7#
      • 1...Bc4
        • 2.Qxa5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 6
  • Sets
    • Q(a);N_GUARD::S(F)
    • Q(a);N_GUARD::S(F),XQ(a)
    • B(e);CHECK,N_GUARD::QAB(B),XB(e)
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • K(i);S_FLIGHT::QAB1(B)
      • Refutation
        • K(i);S_FLIGHT,XB(A)
    • Try
      • Q(B);CHECK
      • Refutation
        • S(h);XQ(B)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);N_GUARD,XB(A)::S(F)
        • B(e);N_GUARD,XB(A)::P(C)
        • B(f);XP(C)::QAR2(B)
        • B(e);SBLOCK::QAB1(B)
        • B(f);::QAR2(B)
      • Refutation
        • B(e);CHECK
  • Actual
    • Q(B);
    • Threat
      • B(A),XB(e)
    • Vars
      • B(e);CHECK,N_GUARD::QAB(B),XB(e)
      • K(i);S_FLIGHT::B(A),XB(e)
      • Q(a);N_GUARD,XB(A)::S(F)
      • B(e);N_GUARD,XB(A)::P(C)
      • B(f);OGATE,XP(C)::QAB(B),XB(e)
      • B(e);SBLOCK::QAB1(B)
      • B(f);OGATE::QAB(B),XB(e)
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).