MESON Chess Problem Database

Problem Display
PID: 270382 (7Q/8/1N1K2k1/8/5P2/1B1P4/8/8 w - - 0 1)

Peretyaka, E

Shakhmatnaya kompozitsiya, 1997

7Q/8/1N1K2k1/8/5P2/1B1P4/8/8

#2

6 + 1

SOLUTION

  • SOUND
  • Tries
    • 1.Sc4?
      • 1...Kf7
        • 2.Se5#
      • 1...Kf5!
    • 1.Bd1?
      • 1...Kf7
        • 2.Bh5#
      • 1...Kf5!
    • 1.Ba4?
      • 1...Kf7
        • 2.Be8#
      • 1...Kf5!
    • 1.Qg7+?
      • 1...Kf5
        • 2.Qg5#
      • 1...Kh5
        • 2.Qg5#
      • 1...Kxg7!
    • 1.Qh4?
      • 1...Kf5
        • 2.Qg5#
      • 1...Kg7!
    • 1.Qh6+?
      • 1...Kf5
        • 2.Be6#
        • 2.Qg5#
      • 1...Kxh6!
    • 1.Qh7+?
      • 1...Kf6
        • 2.Sd5#
        • 2.Sd7#
        • 2.Qf7#
      • 1...Kxh7!
    • 1.Qg8+?
      • 1...Kf5
        • 2.Qg5#
      • 1...Kh5
        • 2.Qg5#
      • 1...Kf6
        • 2.Qf7#
        • 2.Qg5#
      • 1...Kh6!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Se7#
      • 1...Kf5
        • 2.Qh5#
      • 1...Kf7
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::B(A)+S(D),DCHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(A);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::B(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(A);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::B(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(F)
      • Refutation
        • K(a);P-FLIGHT,XQ(F)
    • Try
      • Q(F);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAR1(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(F);CHECK
      • Refutation
        • K(a);P-FLIGHT,XQ(F)
    • Try
      • Q(F);CHECK
      • Refutation
        • K(a);S_FLIGHT,XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(F)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • K(a);N_GUARD,S_FLIGHT::QAR2(F)
      • K(a);S_FLIGHT::B(A)+S(D)
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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).