MESON Chess Problem Database

Problem Display
PID: 226667 (8/3qp3/3p2N1/5P2/2P1k2K/8/1p6/5QBb w - - 0 1)

Bernard, Edmond

Themes-64, 1979

8/3qp3/3p2N1/5P2/2P1k2K/8/1p6/5QBb

#2

6 + 6

16895 Schweizer Schachkompositionen (1976-1986) (Henneberger) 1989

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf5
      • 2.Qe2#
    • 1...Bf3
      • 2.Qb1#
  • Tries
    • 1.Kg3?
      • threat
        • 2.Qb1#
      • 1...b1Q
        • 2.Qxb1#
      • 1...b1S
        • 2.Qxb1#
      • 1...b1B
        • 2.Qxb1#
      • 1...b1R
        • 2.Qxb1#
      • 1...Qa4!
    • 1.Kg5?
      • threat
        • 2.Qe2#
      • 1...Qxf5+
        • 2.Qxf5#
      • 1...Bf3
        • 2.Qb1#
      • 1...Qa7!
  • Keys
    • 1.Kg4!
      • threat
        • 2.Qe2#
        • 2.Qb1#
      • 1...Qxf5+
        • 2.Qxf5#
      • 1...Bf3+
        • 2.Qxf3#
      • 1...b1Q
        • 2.Qe2#
        • 2.Qxb1#
      • 1...b1S
        • 2.Qe2#
        • 2.Qxb1#
      • 1...b1B
        • 2.Qe2#
        • 2.Qxb1#
      • 1...b1R
        • 2.Qe2#
        • 2.Qxb1#
      • 1...Qa4
        • 2.Qe2#
      • 1...Qa7
        • 2.Qb1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(e);SBLOCK,XP(E)::QAR2(A)
    • B(a);SBLOCK::QAB(A)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Threat
        • QAB(A)
      • Vars
        • P(b);::QAB(A),XQ(b)
        • P(b);::QAB(A),XS(b)
        • P(b);::QAB(A),XB(b)
        • P(b);::QAB(A),XR(b)
      • Refutation
        • Q(e);
    • Try
      • K(D);S_FLIGHT
      • Threat
        • QAR2(A)
      • Vars
        • Q(e);CHECK,OGATE,XP(E)::QAB1(A),XQ(e)
        • B(a);SBLOCK::QAB(A)
      • Refutation
        • Q(e);
  • Actual
    • K(D);P-FLIGHT,P_SPINP(E)
    • Threat
      • DUALS(2)
    • Vars
      • Q(e);CHECK,OGATE,XP(E)::QAB1(A),XQ(e)
      • B(a);CHECK,N_GUARD::QAB1(A),XB(a)
      • Q(e);N_PINP(E)::QAR2(A)
      • Q(e);N_PINP(E)::QAB(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).