MESON Chess Problem Database

Problem Display
PID: 175035 (3B4/8/3p4/3pk3/4P3/8/B1Q1KN2/8 w - - 0 1)

Browne, AL

Boston Sunday Post, 1901

3B4/8/3p4/3pk3/4P3/8/B1Q1KN2/8

#2

6 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Bf6#
    • 1...dxe4
      • 2.Qxe4#
  • Tries
    • 1.Kf3?
      • 1...dxe4+
        • 2.Qxe4#
      • 1...Kd4
        • 2.Bf6#
      • 1...d4
        • 2.Sd3#
        • 2.Sg4#
      • 1...Ke6!
    • 1.Bxd5?
      • 1...Kd4
        • 2.Bf6#
      • 1...Kf4!
    • 1.Bg5?
      • 1...Kd4
        • 2.Bf6#
      • 1...dxe4
        • 2.Qxe4#
      • 1...d4
        • 2.Sg4#
      • 1...Ke6!
    • 1.exd5?
      • threat
        • 2.Qe4#
      • 1...Kd4
        • 2.Bf6#
      • 1...Kf4!
  • Keys
    • 1.Qc6!
      • 1...Kd4
        • 2.Bf6#
      • 1...Kf4
        • 2.Qxd6#
      • 1...Ke6
        • 2.Qe8#
      • 1...dxe4
        • 2.Qxe4#
      • 1...d4
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::B(F)
    • P(a);OGATE,XP(E)::QAR1(B),XP(a)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Vars
        • P(a);CHECK,OGATE,XP(E)::QAR1(B),XP(a)
        • K(b);S_FLIGHT::B(F)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(a)
    • Try
      • B(A);XP(a)
      • Vars
        • K(b);S_FLIGHT::B(F)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(F);
      • Vars
        • K(b);S_FLIGHT::B(F)
        • P(a);OGATE,XP(E)::QAR1(B),XP(a)
        • P(a);SBLOCK::S(D)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(a)
    • Try
      • P(E);XP(a)
      • Threat
        • QAR1(B)
      • Vars
        • K(b);S_FLIGHT::B(F)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(b);S_FLIGHT::B(F)
      • K(b);S_FLIGHT::QAB(B),XP(c)
      • K(b);P-FLIGHT,P_SPINP(a)::QAR2(B)
      • P(a);OGATE,XP(E)::QAR1(B),XP(a)
      • P(a);SBLOCK::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).