MESON Chess Problem Database

Problem Display
PID: 78701 (8/K1Q1B2b/P1P5/3P2rn/RN1k4/1Pp2RN1/P1Pp2B1/3n2q1 w - - 0 1)

Diot, Roger

L'Echiquier de Paris, 1955

8/K1Q1B2b/P1P5/3P2rn/RN1k4/1Pp2RN1/P1Pp2B1/3n2q1

#2

14 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd5
      • 2.Sd3#
    • 1...Re5
      • 2.Qb6#
    • 1...Rf5
      • 2.Rd3#
    • 1...Rg6
      • 2.Rd3#
    • 1...Bd3
      • 2.Rxd3#
    • 1...Be4
      • 2.Se2#
    • 1...Bg8
      • 2.Rd3#
  • Tries
    • 1.Rf4+?
      • 1...Ke3
        • 2.Bc5#
      • 1...Be4
        • 2.Rxe4#
      • 1...Sxf4!
    • 1.Qf4+?
      • 1...Be4
        • 2.Se2#
        • 2.Rd3#
        • 2.Qxe4#
      • 1...Sxf4!
  • Keys
    • 1.Re3!
      • threat
        • 2.Qb6#
      • 1...Kxe3
        • 2.Bc5#
      • 1...Qxe3
        • 2.Sd3#
      • 1...Rxd5
        • 2.Sxd5#
      • 1...Sxe3
        • 2.Se2#
      • 1...Be4
        • 2.Rxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(f);SBLOCK,XP(I)::R(G)+S(H)
    • R(f);SBLOCK::QAB(M)
    • R(f);S_CUTB(h)::R1(E)
    • B(h);N_GUARD::R1(E),XB(h)
    • B(h);SBLOCK::S(F)
    • B(h);N_GUARD::R1(E)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(e);S_FLIGHT::B(N)
        • B(h);N_GUARD,P_SPINB(h)::R1(E),XB(h)
      • Refutation
        • S(g);XR(E)
    • Try
      • Q(M);CHECK
      • Refutation
        • S(g);XQ(M)
  • Actual
    • R(E);
    • Threat
      • QAB(M)
    • Vars
      • K(e);S_FLIGHT,XR(E)::B(N)
      • Q(b);SBLOCK,XR(E)::R(G)+S(H)
      • R(f);XP(I)::R(G)+S(H),XR(f)
      • S(a);SBLOCK,XR(E)::S(F)
      • B(h);N_GUARD::R1(E),XB(h)
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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).