MESON Chess Problem Database

Problem Display
PID: 10196 (r3k1BR/8/3BN3/5b2/N5Q1/8/8/K7 w q - 0 1)

Barnes, Barry Peter

The Problemist, 1962

r3k1BR/8/3BN3/5b2/N5Q1/8/8/K7

#2

7 + 3

4199 Barnes about Chess Problems 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa4+
      • 2.Qxa4#
    • 1...Bxe6
      • 2.Bxe6#
  • Tries
    • 1.Sc7+?
      • 1...Kd8
        • 2.Be6#
      • 1...Kd7!
    • 1.Sg7+?
      • 1...Kd8
        • 2.Be6#
      • 1...Kd7!
    • 1.Bf7+?
      • 1...Kxf7
        • 2.Qxf5#
      • 1...Kd7!
    • 1.Bh7+?
      • 1...Kf7
        • 2.Qxf5#
      • 1...Kd7!
    • 1.Qh5+?
      • 1...Bg6
        • 2.Qb5#
      • 1...Kd7!
    • 1.Qh4?
      • threat
        • 2.Qe7#
      • 1...Rxa4+
        • 2.Qxa4#
      • 1...Ra7
        • 2.Qd8#
      • 1...Kd7!
    • 1.Qg7?
      • threat
        • 2.Bh7#
        • 2.Qe7#
        • 2.Qf7#
      • 1...Bxe6
        • 2.Bxe6#
        • 2.Qe7#
      • 1...Ra7
        • 2.Bh7#
      • 1...Bg6
        • 2.Bh7#
        • 2.Qe7#
      • 1...Bh7
        • 2.Bxh7#
        • 2.Qe7#
        • 2.Qf7#
      • 1...Rxa4+!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Ba2#
        • 2.Bb3#
        • 2.Bc4#
        • 2.Bd5#
        • 2.Be6#
      • 1...Rxa4+
        • 2.Ba2#
      • 1...Kd8
        • 2.Ba2#
        • 2.Bb3#
        • 2.Bc4#
        • 2.Bd5#
        • 2.Be6#
        • 2.Bf7#
        • 2.Bh7#
      • 1...0-0-0
        • 2.Sb6#
      • 1...Be6
        • 2.Bxe6#
      • 1...Bh7
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(b);CHECK,OGATE,XS(B)::QAB(C),XR(b)
    • B(a);OGATE,XS(E)::R(G)+B(F),XB(a)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(c);P-FLIGHT::R(G)+B(F)
      • Refutation
        • K(c);P_SPINB(a),S_FLIGHT
    • Try
      • S(E);CHECK
      • Vars
        • K(c);P-FLIGHT::R(G)+B(F)
      • Refutation
        • K(c);P_SPINB(a),S_FLIGHT
    • Try
      • B(F);CHECK
      • Vars
        • K(c);S_FLIGHT,XB(F)::QAR2(C),XB(a)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • B(F);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR2(C),XB(a)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • B(a);OGATE,P_SPINB(a)::QAB(C)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • R(b);CHECK,OGATE,XS(B)::QAB(C),XR(b)
        • R(b);N_GUARD::QAR1(C)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • DUALS(3)
      • Vars
        • R(b);::R(G)+B(F)
      • Refutation
        • R(b);CHECK,XS(B)
  • Actual
    • S(E);
    • Threat
      • DUALS(5)
    • Vars
      • R(b);CHECK,XS(B)::R(G)+B(F)
      • K(c);0-0-0,N_PINS(B),P_SPINB(a)::S(B)
      • B(a);::R(G)+B(F),XB(a)
      • B(a);OGATE::QAB1(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).