MESON Chess Problem Database

Problem Display
PID: 56686 (8/8/Q7/8/1k1K4/1b6/8/1R6 w - - 0 1)

Cavrel, Edouard

Bulletin de la FFE, 1923

8/8/Q7/8/1k1K4/1b6/8/1R6

#2

3 + 2

5454 Near Snap 2013

SOLUTION

  • SOUND
  • Tries
    • 1.Ra1?
      • threat
        • 2.Qb7#
        • 2.Qa5#
        • 2.Qb6#
      • 1...Bd1
        • 2.Qc4#
        • 2.Qb7#
        • 2.Qb6#
      • 1...Bc2
        • 2.Qc4#
        • 2.Qb7#
        • 2.Qb6#
      • 1...Ba4
        • 2.Qxa4#
      • 1...Bc4
        • 2.Qxc4#
        • 2.Qa4#
      • 1...Bd5
        • 2.Qa4#
        • 2.Qb6#
      • 1...Be6
        • 2.Qb7#
        • 2.Qa4#
        • 2.Qb6#
      • 1...Bf7
        • 2.Qb7#
        • 2.Qa4#
        • 2.Qb6#
      • 1...Bg8
        • 2.Qb7#
        • 2.Qa4#
        • 2.Qb6#
      • 1...Ba2!
    • 1.Qc4+?
      • 1...Ka3
        • 2.Qxb3#
      • 1...Ka5!
    • 1.Qb5+?
      • 1...Ka3
        • 2.Qxb3#
      • 1...Kxb5!
    • 1.Qb6+?
      • 1...Ka3
        • 2.Qxb3#
      • 1...Ka4!
  • Keys
    • 1.Qa8!
      • 1...Kb5
        • 2.Rxb3#

Anticipated by 4508(1873)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(A);N_PINB(a)
      • Threat
        • DUALS(3)
      • Vars
        • B(a);N_GUARD::QAR1(C),XB(a)
      • Refutation
        • B(a);
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);N_SPINB(a),S_FLIGHT::QAR1(C),XB(a)
      • Refutation
        • K(b);N_SPINB(a),S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);N_SPINB(a),OGATE,S_FLIGHT::QAR1(C),XB(a)
      • Refutation
        • K(b);P-FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);N_SPINB(a),OGATE,S_FLIGHT::QAR1(C),XB(a)
      • Refutation
        • K(b);N_SPINB(a),P-FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(b);P-FLIGHT::R(A),XB(a)
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).