MESON Chess Problem Database

Problem Display
PID: 215130 (Q7/4b3/3R3N/4k1p1/3p1N2/1K3P2/8/8 w - - 0 1)

Anonymous

SEPA, 1942

Q7/4b3/3R3N/4k1p1/3p1N2/1K3P2/8/8

#2

6 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...gxf4
      • 2.Qd5#
  • Tries
    • 1.Sh5?
      • threat
        • 2.Qd5#
      • 1...Bxd6
        • 2.Qe4#
      • 1...Kxd6!
    • 1.Sf5?
      • threat
        • 2.Qe4#
      • 1...Kxf4
        • 2.Qe4#
      • 1...Kxf5
        • 2.Qe4#
      • 1...Bxd6!
    • 1.Sf7+?
      • 1...Kf5
        • 2.Qe4#
      • 1...Kxf4!
    • 1.Rd5+?
      • 1...Kf6
        • 2.Qh8#
      • 1...Kxf4!
    • 1.Rg6?
      • threat
        • 2.Sd3#
        • 2.Qe4#
      • 1...gxf4
        • 2.Qe4#
      • 1...Bf6
        • 2.Qb8#
      • 1...d3
        • 2.Qe4#
      • 1...Kxf4!
  • Keys
    • 1.Rf6!
      • threat
        • 2.Sg4#
      • 1...Kxf6
        • 2.Qh8#
      • 1...Bxf6
        • 2.Qb8#
      • 1...d3
        • 2.Qa1#
      • 1...g4
        • 2.Sxg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • P(c);SBLOCK,XS(C)::QAR1(F)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAR1(F)
      • Vars
        • B(d);SBLOCK,XR(D)::QAR1(F)
      • Refutation
        • K(b);S_FLIGHT,XR(D)
    • Try
      • S(E);
      • Threat
        • QAR1(F)
      • Vars
        • K(b);S_FLIGHT,XS(C)::QAR1(F)
        • K(b);P-FLIGHT,XS(E)::QAB1(F)
      • Refutation
        • B(d);XR(D)
    • Try
      • S(E);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB1(F)
      • Refutation
        • K(b);S_FLIGHT,XS(C)
    • Try
      • R(D);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB(F)
      • Refutation
        • K(b);S_FLIGHT,XS(C)
    • Try
      • R(D);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);XS(C)::QAR1(F)
        • B(d);N_GUARD::QAB(F)
        • P(a);::QAR1(F)
      • Refutation
        • K(b);S_FLIGHT,XS(C)
  • Actual
    • R(D);
    • Threat
      • S(E)
    • Vars
      • K(b);OGATEB,S_FLIGHT,XR(D)::QAB(F)
      • B(d);N_GUARD,SBLOCK,XR(D)::QAB(F)
      • P(a);OGATEB::QAB(F)
      • P(c);::S(E),XP(c)
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).