MESON Chess Problem Database

Problem Display
PID: 136306 (8/8/5p2/5K2/Q1PB2N1/3kpN2/R1q1bP1R/1n2nB2 w - - 0 1)

Roche, Jean

Europe Echecs, 0000

8/8/5p2/5K2/Q1PB2N1/3kpN2/R1q1bP1R/1n2nB2

#2

10 + 7

6490 yacpdb 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Qb3
      • 2.Bxe2#
    • 1...Qxa4
      • 2.Bxe2#
    • 1...Qc1
      • 2.Bxe2#
    • 1...Qc3
      • 2.Bxe2#
    • 1...Qxc4
      • 2.Bxe2#
    • 1...Sg2
      • 2.Qxc2#
    • 1...exf2
      • 2.Sxf2#
  • Tries
    • 1.Qb3+?
      • 1...Qxb3
        • 2.Bxe2#
      • 1...Qc3
        • 2.Bxe2#
      • 1...Sc3!
  • Keys
    • 1.fxe3!
      • threat
        • 2.Sf2#
      • 1...Qxa4
        • 2.Bxe2#
      • 1...Bxf1
        • 2.Sxe1#
      • 1...Sxf3
        • 2.Qxc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • Q(c);N_GUARD::B(A),XB(d)
    • Q(c);N_GUARD,XQ(F)::B(A),XB(d)
    • Q(c);N_GUARD,XP(G)::B(A),XB(d)
    • S(b);N_GUARD::QAB1(F),XQ(c)
    • P(f);XP(C)::S(I),XP(f)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • Q(c);XQ(F)::B(A),XB(d)
        • Q(c);P_SPINQ(c)::B(A),XB(d)
      • Refutation
        • S(a);P_SPINS(a)
  • Actual
    • P(C);XP(f)
    • Threat
      • S(I)
    • Vars
      • Q(c);N_GUARD,XQ(F)::B(A),XB(d)
      • B(d);N_SPINB(d),XB(A)::S(E),XS(b)
      • S(b);N_GUARD,XS(E)::QAB1(F),XQ(c)
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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).