MESON Chess Problem Database

Problem Display
PID: 767 (3R2rB/K3p3/6B1/2pP1N2/4kP2/p6R/2r3N1/1Qbq4 w - - 0 1)

Morice, Jean

Segal, Leon

British Chess Magazine, 1953

3R2rB/K3p3/6B1/2pP1N2/4kP2/p6R/2r3N1/1Qbq4

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qf3
      • 2.Sg3#
    • 1...Qg4
      • 2.Qxc2#
    • 1...Qh5
      • 2.Qxc2#
    • 1...Qe1
      • 2.Qxc2#
    • 1...Qg1
      • 2.Qxc2#
    • 1...Qh1
      • 2.Qxc2#
    • 1...Qd4
      • 2.Sg7#
    • 1...Qxd5
      • 2.Sd6#
    • 1...Rxd8
      • 2.Sfe3#
      • 2.Sxe7#
    • 1...Re8
      • 2.Sfe3#
      • 2.Sd4#
      • 2.Sfh4#
      • 2.Sh6#
      • 2.Sxe7#
    • 1...Bb2
      • 2.Re3#
    • 1...Be3
      • 2.Rxe3#
  • Tries
    • 1.Qxc2+?
      • 1...Qd3
        • 2.Qxd3#
      • 1...Qxc2!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Qe5#
      • 1...Qxd5
        • 2.Sd6#
      • 1...Bxf4
        • 2.Qxf4#
      • 1...Qf3
        • 2.Sg3#
      • 1...Be3
        • 2.Rxe3#
      • 1...Qd4
        • 2.Sg7#
      • 1...Bb2
        • 2.Re3#
      • 1...e5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(b);SBLOCK::B(G)+S(F),DCHECK
    • Q(b);N_GUARD::QAB(A),XR(c)
    • Q(b);SBLOCK::B(G)+S(F)
    • Q(b);SBLOCK,XP(E)::B(G)+S(F),DCHECK
    • B(a);N_GUARD::R1(C)
    • B(a);N_GUARD::R1(C),XB(a)
  • Tries
    • Try
      • Q(A);CHECK,XR(c)
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b)::QAB1(A),XQ(b)
      • Refutation
        • Q(b);XQ(A)
  • Actual
    • Q(A);N_PINR(c)
    • Threat
      • QAR1(A)
    • Vars
      • Q(b);SBLOCK,XP(E)::B(G)+S(F),DCHECK
      • B(a);OGATE,XP(D)::QAR1(A),XB(a)
      • Q(b);SBLOCK::B(G)+S(F),DCHECK
      • B(a);N_GUARD::R1(C),XB(a)
      • Q(b);SBLOCK::B(G)+S(F)
      • B(a);N_GUARD::R1(C)
      • P(g);::QAR1(A),XP(g)
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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).