MESON Chess Problem Database

Problem Display
PID: 79614 (8/1K6/8/1Q6/8/B1k2p2/p1p1RP2/r1qb4 w - - 0 1)

Davey, David Murray

The Tablet, 1968

(First published on Sat Mar 2 1968)

8/1K6/8/1Q6/8/B1k2p2/p1p1RP2/r1qb4

#2

5 + 7

15239 Valois Notebooks 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.Bxb2#
    • 1...Qd2
      • 2.Bb2#
    • 1...Qe3
      • 2.Bb2#
    • 1...Qf4
      • 2.Bb2#
    • 1...Qg5
      • 2.Bb2#
    • 1...Qh6
      • 2.Bb2#
  • Tries
    • 1.Re3+?
      • 1...Kd2
        • 2.Bb4#
        • 2.Qd3#
        • 2.Qd7#
        • 2.Qb4#
        • 2.Qa5#
        • 2.Qd5#
      • 1...Kd4
        • 2.Qd3#
        • 2.Qc5#
      • 1...Qxe3!
    • 1.Qc5+?
      • 1...Kb3
        • 2.Qb4#
      • 1...Kd3!
  • Keys
    • 1.Rd2!
      • threat
        • 2.Rd3#
        • 2.Qd3#
        • 2.Qb4#
      • 1...Kxd2
        • 2.Bb4#
      • 1...Qxd2
        • 2.Bb2#
      • 1...Qxa3
        • 2.Rd3#
      • 1...Qb2
        • 2.Rd3#
      • 1...Qb1
        • 2.Rd3#
      • 1...Rb1
        • 2.Rd3#
      • 1...Be2
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • Q(b);N_GUARD,P_PINQ(D)::B(C),XQ(b)
    • Q(b);N_GUARD::B(C)
  • Tries
    • Try
      • R(A);CHECK
      • Refutation
        • Q(b);XR(A)
    • Try
      • Q(D);CHECK
      • Vars
        • K(f);P-FLIGHT::QAR1(D)
      • Refutation
        • K(f);P-FLIGHT
  • Actual
    • R(A);
    • Threat
      • DUALS(3)
    • Vars
      • K(f);S_FLIGHT,XR(A)::B(C)
      • Q(b);N_GUARD,SBLOCK,XR(A)::B(C)
      • Q(b);XB(C)::R1(A)
      • Q(b);P_PINQ(D)::R1(A)
      • R(a);P_PINQ(D)::R1(A)
      • B(c);::QAB1(D)
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).