MESON Chess Problem Database

Problem Display
PID: 109283 (7N/8/8/B2Pk1p1/Q5P1/8/3K2B1/8 w - - 0 1)

Ryall, Isaac

Canadian Chess Association, 1874

7N/8/8/B2Pk1p1/Q5P1/8/3K2B1/8

#2

7 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sg6+?
      • 1...Kd6
        • 2.Qc6#
      • 1...Kf6!
    • 1.Qc6?
      • 1...Kd4
        • 2.Bc3#
        • 2.Qc3#
      • 1...Kf4!
    • 1.Qd7?
      • 1...Kf4
        • 2.Bc7#
      • 1...Kf6
        • 2.Bc3#
      • 1...Kd4!
    • 1.Qa3?
      • 1...Kd4
        • 2.Qc3#
      • 1...Kf6
        • 2.Bc3#
      • 1...Kf4!
    • 1.Qc4?
      • 1...Kd6
        • 2.Qc7#
      • 1...Kf6!
    • 1.Qe4+?
      • 1...Kf6
        • 2.Bc3#
      • 1...Kd6!
  • Keys
    • 1.Bb4!
      • 1...Kd4
        • 2.Bd6#
      • 1...Kf4
        • 2.Bd6#
      • 1...Kf6
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT::B(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT::QAB1(C)
        • K(a);S_FLIGHT::B(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);S_FLIGHT::B(E)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • B(E);
    • Vars
      • K(a);S_FLIGHT::QAR(C)+B(E)
      • K(a);S_FLIGHT::QAR(C)+B(E),DCHECK
      • K(a);S_FLIGHT::QAB(C)
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).