MESON Chess Problem Database

Problem Display
PID: 70668 (8/8/2p2p2/Q7/2pk1P2/5P2/B3K3/8 w - - 0 1)

Valuska, Jan

Buletin Problemistic, 1970

8/8/2p2p2/Q7/2pk1P2/5P2/B3K3/8

#2

5 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...c3
      • 2.Qb4#
    • 1...c5
      • 2.Qd2#
    • 1...f5
      • 2.Qe5#
  • Tries
    • 1.Bb1?
      • 1...c5
        • 2.Qd2#
      • 1...f5
        • 2.Qe5#
      • 1...c3!
    • 1.Bb3?
      • 1...c5
        • 2.Qd2#
      • 1...c3
        • 2.Qb4#
      • 1...f5
        • 2.Qe5#
      • 1...cxb3!
    • 1.Qd8+?
      • 1...Kc3
        • 2.Qd2#
      • 1...Kc5!
  • Keys
    • 1.Kd2!
      • 1...c3+
        • 2.Qxc3#
      • 1...c5
        • 2.Qd8#
      • 1...f5
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATEB::QAR2(E)
    • P(c);SBLOCK::QAR2(E)
    • P(d);N_GUARD::QAB1(E)
  • Tries
    • Try
      • B(A);
      • Vars
        • P(c);SBLOCK::QAR2(E)
        • P(d);N_GUARD::QAB1(E)
      • Refutation
        • P(a);
    • Try
      • B(A);
      • Vars
        • P(c);SBLOCK::QAR2(E)
        • P(a);OGATEB::QAR2(E)
        • P(d);N_GUARD::QAB1(E)
      • Refutation
        • P(a);XB(A)
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(E)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • K(B);P-FLIGHT
    • Vars
      • P(a);CHECK::QAB1(E),XP(a)
      • P(c);SBLOCK::QAR(E)
      • P(d);N_GUARD::QAB1(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).