MESON Chess Problem Database

Problem Display
PID: 274304 (3N4/4kP2/1K2P3/8/8/8/3B4/7Q w - - 0 1)

Petrasinovic, Petrasin

Tehtavaniekka, 2023

3N4/4kP2/1K2P3/8/8/8/3B4/7Q

#2

6 + 1

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd8
      • 2.f8Q#
  • Tries
    • 1.Bc3?
      • 1...Kd6
        • 2.f8Q#
        • 2.f8B#
      • 1...Kxd8
        • 2.f8Q#
      • 1...Kf8!
    • 1.Bb4+?
      • 1...Kxd8
        • 2.Qa8#
        • 2.Qh8#
        • 2.f8Q#
        • 2.f8R#
      • 1...Kf6!
    • 1.Bg5+?
      • 1...Kf8
        • 2.Qh6#
        • 2.Qh8#
      • 1...Kd6!
    • 1.Qg2?
      • 1...Kf6
        • 2.Qg5#
      • 1...Kxd8
        • 2.f8Q#
      • 1...Kf8
        • 2.Bb4#
      • 1...Kd6!
    • 1.Qe4?
      • 1...Kd6
        • 2.Bb4#
        • 2.f8Q#
        • 2.f8B#
      • 1...Kf6
        • 2.f8Q#
      • 1...Kxd8
        • 2.f8Q#
      • 1...Kf8!
    • 1.Qd5?
      • 1...Kf6
        • 2.Qg5#
      • 1...Kf8!
    • 1.Qb7+?
      • 1...Kd6
        • 2.Bf4#
      • 1...Kxd8
        • 2.Bg5#
        • 2.Qc7#
        • 2.Qd7#
        • 2.e7#
        • 2.f8Q#
        • 2.f8R#
      • 1...Kf8
        • 2.Bh6#
      • 1...Kf6!
    • 1.Qa1?
      • 1...Kxd8
        • 2.f8Q#
      • 1...Kf8
        • 2.Bb4#
      • 1...Kd6!
    • 1.Qh4+?
      • 1...Kf8
        • 2.Bh6#
      • 1...Kd6!
    • 1.Qh5?
      • 1...Kd6
        • 2.Bb4#
        • 2.Qc5#
        • 2.f8Q#
        • 2.f8B#
      • 1...Kf6
        • 2.Qg5#
        • 2.f8Q#
      • 1...Kxd8
        • 2.f8Q#
      • 1...Kf8!
    • 1.Qh6?
      • threat
        • 2.f8Q#
      • 1...Kxd8
        • 2.Qf8#
        • 2.f8Q#
      • 1...Kd6!
  • Keys
    • 1.Qg1!
      • 1...Kd6
        • 2.Qc5#
      • 1...Kf6
        • 2.Qg5#
      • 1...Kxd8
        • 2.f8Q#
      • 1...Kf8
        • 2.Bb4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);N_GUARD,S_FLIGHT,XS(F)::P=Q
  • Tries
    • Try
      • B(B);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::P=Q
        • K(a);N_GUARD,S_FLIGHT,XS(F)::P=Q
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(B);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(B);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB1(A)
        • K(a);N_GUARD,S_FLIGHT,XS(F)::P=Q
        • K(a);N_GUARD,S_FLIGHT::B(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::P=Q
        • K(a);N_GUARD,S_FLIGHT,XS(F)::P=Q
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::B(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);N_GUARD,S_FLIGHT,XS(F)::P=Q
        • K(a);N_GUARD,S_FLIGHT::B(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::B(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);N_GUARD,S_FLIGHT,XS(F)::P=Q
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • P=Q
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);N_GUARD,S_FLIGHT::QAB1(A)
      • K(a);N_GUARD,S_FLIGHT,XS(F)::P=Q
      • K(a);N_GUARD,S_FLIGHT::B(B)
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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).