MESON Chess Problem Database

Problem Display
PID: 181930 (8/4R3/5p2/7K/4NkPp/Q2n4/3PR3/4n3 w - - 0 1)

Gibbins, Norman Martin

British Chess Magazine, 1912

8/4R3/5p2/7K/4NkPp/Q2n4/3PR3/4n3

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Kf3
      • 2.Rf2#
    • 1...Sc1
      • 2.Qe3#
    • 1...Sb2
      • 2.Qe3#
    • 1...Sf2
      • 2.Qe3#
    • 1...Sb4
      • 2.Qe3#
    • 1...Sc5
      • 2.Qe3#
    • 1...Se5
      • 2.Qe3#
  • Tries
    • 1.Rf2+?
      • 1...Sxf2
        • 2.Qe3#
      • 1...Sf3!
    • 1.Qc5?
      • threat
        • 2.Qe3#
        • 2.Qf5#
      • 1...Kf3
        • 2.Qe3#
      • 1...Sc2
        • 2.Qf5#
      • 1...Sg2
        • 2.Qf5#
      • 1...Se5
        • 2.Qe3#
      • 1...f5
        • 2.Qe3#
        • 2.Qxf5#
      • 1...Sxc5!
    • 1.Qd6+?
      • 1...Se5
        • 2.Qxf6#
      • 1...Kf3!
    • 1.Qc3?
      • threat
        • 2.Qxf6#
      • 1...Kf3
        • 2.Rf2#
      • 1...Se5
        • 2.Qe3#
      • 1...f5!
    • 1.Qxd3?
      • threat
        • 2.Qe3#
      • 1...Sc2
        • 2.Rf2#
      • 1...Sg2
        • 2.Rf2#
      • 1...Sxd3!
  • Keys
    • 1.Re5!
      • threat
        • 2.Rf5#
      • 1...Kf3
        • 2.Rf2#
      • 1...Kxe5
        • 2.Qd6#
      • 1...Sxe5
        • 2.Qe3#
      • 1...fxe5
        • 2.Qf8#
      • 1...f5
        • 2.Rxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • K(c);P-FLIGHT,P_SPINS(b)::R1(B)
    • S(b);OGATE::QAB1(C)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • S(b);OGATE,XR(B)::QAB1(C)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P-FLIGHT::QAR1(C)
        • S(a);::QAR1(C)
        • S(b);::QAB1(C)
      • Refutation
        • S(b);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • S(b);P_SPINS(b)::QAR2(C),XP(e)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAR2(C),XP(e)
      • Vars
        • K(c);P-FLIGHT,P_SPINS(b)::R1(B)
        • S(b);OGATE::QAB1(C)
      • Refutation
        • P(e);
    • Try
      • Q(C);XS(b)
      • Threat
        • QAB1(C)
      • Vars
        • S(a);N_GUARD::R(B)
      • Refutation
        • S(a);XQ(C)
  • Actual
    • R(G);
    • Threat
      • R1(G)
    • Vars
      • K(c);P-FLIGHT,P_SPINS(b)::R1(B)
      • K(c);OGATEB,S_FLIGHT,XR(G)::QAB1(C)
      • S(b);OGATE,SBLOCK,XR(G)::QAB1(C)
      • P(e);OGATEB,SBLOCK,XR(G)::QAR(C)
      • P(e);::R1(G),XP(e)
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).