MESON Chess Problem Database

Problem Display
PID: 176474 (1B2R3/4b2B/1R4r1/6p1/5p2/N1PpkbnQ/3n3N/4K3 w - - 0 1)

Michel, Francois

Monreal, Pierre

3rd HM., Schach-Echo, 1973/I

1B2R3/4b2B/1R4r1/6p1/5p2/N1PpkbnQ/3n3N/4K3

#2

9 + 9

274 diagrammes 1974
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qe6#
    • 1...Sde4
      • 2.Sc4#
    • 1...Sge4
      • 2.Sg4#
  • Tries
    • 1.Sc2+?
      • 1...Ke4
        • 2.Qe6#
      • 1...dxc2!
    • 1.Sc4+?
      • 1...Ke4
        • 2.Qe6#
      • 1...Sxc4!
  • Keys
    • 1.Ba7!
      • threat
        • 2.Re6#
      • 1...Ke4
        • 2.Qe6#
      • 1...Rxb6
        • 2.Bxb6#
      • 1...Rc6
        • 2.Rxc6#
      • 1...Rd6
        • 2.Rxd6#
      • 1...Re6
        • 2.Rd6#
        • 2.Rxe6#
      • 1...Be4
        • 2.Rd6#
      • 1...Bc6
        • 2.Rb4#
      • 1...Sde4
        • 2.Sc4#
      • 1...Sge4
        • 2.Sg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT,P_SPINR(h)::QAR2(E)
    • S(a);N_GUARD,N_SPINB(i),SBLOCK::S(C)
    • S(e);N_SPINB(i),P_SPINB(d),SBLOCK::S(B)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(c);P-FLIGHT,P_SPINR(h)::QAR2(E)
      • Refutation
        • P(b);XS(C)
    • Try
      • S(C);CHECK
      • Vars
        • K(c);P-FLIGHT,P_SPINR(h)::QAR2(E)
      • Refutation
        • S(a);XS(C)
  • Actual
    • B(H);
    • Threat
      • B(H)+R(F),DCHECK
    • Vars
      • K(c);P-FLIGHT,P_SPINR(h)::QAR2(E)
      • R(h);OGATE,P_SPINR(h),XR(F)::B(H),XR(h)
      • R(h);::B(H)+R(F),XR(h)
      • B(d);N_SPINB(i),P_SPINS(e),SBLOCK::B(H)+R(F)
      • B(d);P_SPINS(e),S_CUTR(h)::B(H)+R(F)
      • S(a);N_GUARD,N_SPINB(i),SBLOCK::S(C)
      • S(e);N_SPINB(i),P_SPINB(d),SBLOCK::S(B)
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).