MESON Chess Problem Database

Problem Display
PID: 214772 (2B5/4p3/4R3/6p1/3R1bkp/7N/5P2/5Q1K w - - 0 1)

Anonymous

Detroit Free Press, 1878

2B5/4p3/4R3/6p1/3R1bkp/7N/5P2/5Q1K

#2

7 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kf3
      • 2.Qe2#
      • 2.Qg2#
      • 2.Qd1#
  • Tries
    • 1.Rh6+?
      • 1...Kf3
        • 2.Sg1#
        • 2.Qd1#
      • 1...e6!
    • 1.Rxe7+?
      • 1...Kf3
        • 2.Sg1#
        • 2.Qe2#
        • 2.Qg2#
        • 2.Qd1#
      • 1...Kh5!
    • 1.Qe2+?
      • 1...Kxh3
        • 2.Re3#
      • 1...Kf5!
    • 1.Qb5?
      • 1...Kf3
        • 2.Qe2#
      • 1...Kxh3
        • 2.Re3#
      • 1...Kh5!
    • 1.Qb1?
      • 1...Kf3
        • 2.Qd1#
      • 1...Kxh3
        • 2.Re3#
      • 1...Kh5!
    • 1.Qd1+?
      • 1...Kxh3
        • 2.Re3#
      • 1...Kf5!
    • 1.f3+?
      • 1...Kg3
        • 2.Qg2#
      • 1...Kf5
        • 2.Qd3#
        • 2.Qb1#
      • 1...Kh5!
  • Keys
    • 1.Qa6!
      • 1...Kf3
        • 2.Qe2#
      • 1...Kxh3
        • 2.Re3#
      • 1...Kf5
        • 2.Rxe7#
      • 1...Kh5
        • 2.Rh6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(F);CHECK
      • Refutation
        • P(e);P_SPINP(e)
    • Try
      • R(F);CHECK,XP(e)
      • Refutation
        • K(b);N_SPINB(a),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);N_SPINB(a),S_FLIGHT,XS(D)::B(G)+R(F),DCHECK
      • Refutation
        • K(b);N_SPINB(a),S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(b);N_SPINB(a),S_FLIGHT::QAB1(A)
        • K(b);N_SPINB(a),S_FLIGHT,XS(D)::B(G)+R(F),DCHECK
      • Refutation
        • K(b);N_SPINB(a),P_SPINP(d),S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(b);N_SPINB(a),S_FLIGHT::QAB(A)
        • K(b);N_SPINB(a),S_FLIGHT,XS(D)::B(G)+R(F),DCHECK
      • Refutation
        • K(b);N_SPINB(a),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);N_SPINB(a),S_FLIGHT,XS(D)::B(G)+R(F),DCHECK
      • Refutation
        • K(b);N_SPINB(a),S_FLIGHT
    • Try
      • P(C);CHECK
      • Vars
        • K(b);N_SPINB(a),P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);N_SPINB(a),S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);N_SPINB(a),S_FLIGHT::QAB1(A)
      • K(b);N_SPINB(a),S_FLIGHT,XS(D)::B(G)+R(F),DCHECK
      • K(b);N_SPINB(a),S_FLIGHT::B(G)+R(F),XP(e)
      • K(b);N_SPINB(a),S_FLIGHT::R1(F)
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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).