MESON Chess Problem Database

Problem Display
PID: 267736 (2N1nbr1/1n2P3/2K1k3/p3P1RQ/2P1R3/8/B4r2/8 w - - 0 1)

Torres, B

El Diluvio, 1933

2N1nbr1/1n2P3/2K1k3/p3P1RQ/2P1R3/8/B4r2/8

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rf1
      • 2.c5#
    • 1...Rf4
      • 2.c5#
    • 1...Rf5
      • 2.c5#
    • 1...Rf6
      • 2.c5#
    • 1...Rf7
      • 2.c5#
    • 1...Sd8+
      • 2.exd8S#
  • Tries
    • 1.Qg4+?
      • 1...Rf5
        • 2.Qxf5#
        • 2.c5#
      • 1...Kf7!
    • 1.Qg6+?
      • 1...Rf6
        • 2.c5#
        • 2.exf6#
      • 1...Sf6
        • 2.exf6#
      • 1...Rxg6!
    • 1.Qf7+?
      • 1...Rxf7
        • 2.c5#
      • 1...Kxf7!
    • 1.Qh3+?
      • 1...Rf5
        • 2.Qxf5#
        • 2.c5#
      • 1...Kf7!
    • 1.exf8S+?
      • 1...Rfxf8
        • 2.c5#
      • 1...Rgxf8!
  • Keys
    • 1.Rf5!
      • threat
        • 2.Qf7#
      • 1...Sd8+
        • 2.exd8S#
      • 1...Rxf5
        • 2.c5#
      • 1...Rg6
        • 2.exf8S#
      • 1...Rg7
        • 2.exf8S#
      • 1...Sbd6
        • 2.exd6#
      • 1...Sed6
        • 2.exd6#
      • 1...Sf6
        • 2.exf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • R(a);N_GUARD::B(A)+P(B)
    • S(d);CHECK,OGATE::PXS(d)=S
  • Tries
    • Try
      • Q(F);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • S(e);OGATE,P_SPINS(e)::R(C)+P(D),XS(e)
      • Refutation
        • R(g);XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • R(a);SBLOCK,XQ(F)::B(A)+P(B)
      • Refutation
        • K(c);S_FLIGHT,XQ(F)
    • Try
      • Q(F);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • P(H);CHECK,XB(f)
      • Vars
        • R(a);XS(H)::B(A)+P(B)
      • Refutation
        • R(g);XS(H)
  • Actual
    • R(E);
    • Threat
      • QAB1(F)
    • Vars
      • S(d);CHECK,OGATE::PXS(d)=S
      • R(a);N_GUARD,XR(E)::B(A)+P(B)
      • R(g);N_GUARD::PXB(f)=S
      • S(d);OGATE::R(C)+P(D),XS(d)
      • S(e);OGATE::R(C)+P(D),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).