MESON Chess Problem Database

Problem Display
PID: 184067 (b4RB1/b5P1/3p2P1/r3k2N/2R1N3/p5Pn/1r2Q1K1/B7 w - - 0 1)

Monreal, Pierre

Bulletin Ouvrier des Echecs, 1955

b4RB1/b5P1/3p2P1/r3k2N/2R1N3/p5Pn/1r2Q1K1/B7

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Sc5#
    • 1...Bxe4+
      • 2.Rxe4#
    • 1...Sf4+
      • 2.gxf4#
  • Tries
    • 1.Bxb2+?
      • 1...Bd4
        • 2.Bxd4#
      • 1...axb2!
    • 1.Qxb2+?
      • 1...Bd4
        • 2.Qxd4#
      • 1...axb2!
    • 1.g4?
      • threat
        • 2.Rf5#
        • 2.Re8#
      • 1...Bxe4+
        • 2.Rxe4#
      • 1...Bd5
        • 2.Rf5#
      • 1...Bc6
        • 2.Rf5#
      • 1...Sg5
        • 2.Rf5#
      • 1...Sf4+!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Sd3#
      • 1...Bxe4+
        • 2.Rxe4#
      • 1...Sxf4+
        • 2.gxf4#
      • 1...Rd5
        • 2.Sc5#
      • 1...Sf2
        • 2.Qh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(d);N_PINS(F)::QAR(B)+S(F)
    • B(h);CHECK,OGATE,P_SPINB(h),XS(F)::R1(E),XB(h)
    • S(c);CHECK,OGATE::P(D),XS(c)
  • Tries
    • Try
      • B(A);CHECK,N_SPINQ(B),XR(a)
      • Vars
        • B(g);N_GUARD,P_SPINB(g)::B(A),XB(g)
      • Refutation
        • P(b);XB(A)
    • Try
      • Q(B);CHECK,N_SPINQ(B),XR(a)
      • Vars
        • B(g);N_GUARD,P_SPINB(g)::QAB1(B),XB(g)
      • Refutation
        • P(b);P_SPINP(b),XQ(B)
    • Try
      • P(D);
      • Threat
        • DUALS(2)
      • Vars
        • B(h);CHECK,OGATE,P_SPINB(h),XS(F)::R1(E),XB(h)
        • B(h);::R1(J)
        • S(c);::R1(J)
      • Refutation
        • S(c);CHECK
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • B(h);CHECK,OGATE,P_SPINB(h),XS(F)::R1(E),XB(h)
      • S(c);CHECK,OGATE,XS(G)::P(D),XS(c)
      • R(d);N_PINS(F)::QAR(B)+S(F)
      • S(c);N_PINQ(B)::QAR(B)
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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).