MESON Chess Problem Database

Problem Display
PID: 273314 (K7/B6p/p3P1BQ/5R2/1n2k1P1/1P1N4/2n1pP2/2rrb2q w - - 0 1)

Spiess, Jean-Yves

diagrammes, 1978

K7/B6p/p3P1BQ/5R2/1n2k1P1/1P1N4/2n1pP2/2rrb2q

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd3+
      • 2.Rf3#
    • 1...Qf3
      • 2.Re5#
    • 1...Rxd3
      • 2.Qf4#
    • 1...Bxf2
      • 2.Sxf2#
    • 1...Sa1
      • 2.Qe3#
    • 1...Sa3
      • 2.Qe3#
    • 1...Se3
      • 2.Qxe3#
    • 1...Sd4
      • 2.Qe3#
    • 1...Sxd3
      • 2.Qxh1#
    • 1...Sd5
      • 2.Rf4#
  • Tries
    • 1.Rg5+?
      • 1...Kf3
        • 2.Qxh1#
      • 1...hxg6!
    • 1.Qg5?
      • threat
        • 2.Rf4#
      • 1...Kxd3+
        • 2.Rf3#
      • 1...hxg6!
    • 1.f3+?
      • 1...Qxf3
        • 2.Re5#
      • 1...Kxd3!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Sc5#
      • 1...Kxd3+
        • 2.Rd5#
      • 1...Rxd3
        • 2.Qe5#
      • 1...Bxf2
        • 2.Sxf2#
      • 1...Sxd3
        • 2.Qb7#
      • 1...Sa1
        • 2.Qd4#
      • 1...Sa3
        • 2.Qd4#
      • 1...Se3
        • 2.Qd4#
      • 1...Sd4
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 7
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • K(h);CHECK,N_GUARD,S_FLIGHT,XS(C)::B(G)+R(E),DCHECK
    • Q(d);SBLOCK::B(G)+R(E),DCHECK
    • R(b);SBLOCK,XS(C)::QAR1(H)
    • B(c);XP(A)::S(C),XB(c)
    • S(e);N_GUARD::QAR1(H)
    • S(e);N_GUARD::QAR1(H),XS(e)
    • S(g);SBLOCK,XS(C)::QAB(H),XQ(d)
    • S(g);SBLOCK::B(G)+R(E),DCHECK
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(h);S_FLIGHT::QAB(H),XQ(d)
      • Refutation
        • P(j);XB(G)
    • Try
      • Q(H);
      • Threat
        • B(G)+R(E),DCHECK
      • Vars
        • K(h);CHECK,N_GUARD,S_FLIGHT,XS(C)::B(G)+R(E),DCHECK
      • Refutation
        • P(j);XB(G)
    • Try
      • P(A);CHECK
      • Vars
        • Q(d);SBLOCK,XP(A)::B(G)+R(E),DCHECK
      • Refutation
        • K(h);P_PINP(A),S_FLIGHT,XS(C)
  • Actual
    • Q(H);
    • Threat
      • S(C)
    • Vars
      • K(h);CHECK,N_GUARD,S_FLIGHT,XS(C)::B(G)+R(E),DCHECK
      • R(b);SBLOCK,XS(C)::QAR1(H)
      • B(c);XP(A)::S(C),XB(c)
      • S(g);N_GUARD,SBLOCK,XS(C)::QAB(H)
      • S(e);N_GUARD::QAR1(H)
      • S(e);N_GUARD::QAR1(H),XS(e)
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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).