MESON Chess Problem Database

Problem Display
PID: 103700 (5B2/5p2/4p2K/4kp2/3RpR2/5P2/2P5/4Q2B w - - 0 1)

Rowland, Thomas B

Ottawa Citizen, 1886

5B2/5p2/4p2K/4kp2/3RpR2/5P2/2P5/4Q2B

#2

8 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Bd6+?
      • 1...Kf6
        • 2.Qh4#
      • 1...Kxd4!
    • 1.Rdxe4+?
      • 1...Kf6
        • 2.Qh4#
      • 1...fxe4
        • 2.Qxe4#
      • 1...Kd5!
    • 1.Rfxe4+?
      • 1...Kf6
        • 2.Qh4#
      • 1...fxe4!
    • 1.Qe3?
      • 1...f6
        • 2.Bd6#
      • 1...Kf6!
  • Keys
    • 1.fxe4!
      • 1...Kxd4
        • 2.exf5#
        • 2.e5#
      • 1...Kxf4
        • 2.e5#
      • 1...Kf6
        • 2.e5#
      • 1...fxe4
        • 2.Qxe4#
      • 1...f6
        • 2.exf5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(H);CHECK
      • Vars
        • K(b);N_SPINP(a),P_SPINP(c),S_FLIGHT::QAB(A)
      • Refutation
        • K(b);S_FLIGHT,XR(E)
    • Try
      • R(E);CHECK,XP(a)
      • Vars
        • K(b);P_SPINP(c),S_FLIGHT::QAB(A)
        • P(c);OGATE,P_SPINP(c),XR(E)::QAR1(A),XP(c)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • R(F);CHECK,XP(a)
      • Vars
        • K(b);S_FLIGHT::QAB(A)
      • Refutation
        • P(c);P_SPINP(c),XR(F)
    • Try
      • Q(A);
      • Vars
        • P(e);SBLOCK::B(H)
      • Refutation
        • K(b);N_SPINP(a),P_SPINP(c),S_FLIGHT
  • Actual
    • P(D);XP(a)
    • Vars
      • K(b);OGATE,S_FLIGHT,XR(F)::R(E)+P(D)
      • K(b);OGATE,P_SPINP(c),S_FLIGHT::P(D)
      • P(c);OGATE,P_SPINP(c),XP(D)::QAR1(A),XP(c)
      • P(e);SBLOCK::QAR(A)+P(D),XP(c)
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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).