MESON Chess Problem Database

Problem Display
PID: 75064 (1r4b1/1n2Q3/6p1/4p3/2k5/1NN5/PBq1P2K/2R2B2 w - - 0 1)

Gamage, Frederick

Chess Problem, 1945

1r4b1/1n2Q3/6p1/4p3/2k5/1NN5/PBq1P2K/2R2B2

#2

9 + 7

5397 Frederick Gamage (Prcic) 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb3
      • 2.e3#
    • 1...Qd3
      • 2.exd3#
    • 1...Qxe2+
      • 2.Bxe2#
    • 1...Qxc3
      • 2.e4#
    • 1...Sa5
      • 2.Qc5#
    • 1...Sc5
      • 2.Qxc5#
    • 1...Sd8
      • 2.Qc5#
  • Tries
    • 1.Qa3?
      • threat
        • 2.Qa4#
      • 1...Qxe2+
        • 2.Bxe2#
      • 1...Qxb3
        • 2.e3#
      • 1...Qxc3
        • 2.e4#
      • 1...Sa5
        • 2.Qc5#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sd6
        • 2.Qc5#
      • 1...Sd8
        • 2.Qc5#
      • 1...Ra8!
    • 1.Qh4+?
      • 1...Qe4
        • 2.Qxe4#
      • 1...e4!
    • 1.Qe6+?
      • 1...Kb4
        • 2.a3#
      • 1...Bxe6!
    • 1.Qc7+?
      • 1...Sc5
        • 2.Qxc5#
      • 1...Kb4!
    • 1.Qf7+?
      • 1...Kb4
        • 2.a3#
      • 1...Bxf7!
  • Keys
    • 1.Ba3!
      • threat
        • 2.Qb4#
      • 1...Qxe2+
        • 2.Bxe2#
      • 1...Kxc3
        • 2.Qb4#
      • 1...Qxb3
        • 2.e3#
      • 1...Qxc3
        • 2.e4#
      • 1...Sa5
        • 2.Qc5#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sd6
        • 2.Qc7#
      • 1...Sd8
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(a);N_PINP(E),XS(G)::B(B)+P(E)
    • Q(a);N_PINP(E)::P(E),XQ(a)
    • Q(a);CHECK,OGATE,P_SPINQ(a),XP(E)::B(B),XQ(a)
    • Q(a);N_PINP(E),P_SPINQ(a),XS(H)::B(B)+P(E)
    • S(e);N_GUARD::QAR1(I)
    • S(e);N_GUARD::QAR1(I),XS(e)
  • Tries
    • Try
      • Q(I);
      • Threat
        • QAR2(I)
      • Vars
        • Q(a);CHECK,OGATE,P_SPINQ(a),XP(E)::B(B),XQ(a)
        • Q(a);N_PINP(E),XS(G)::B(B)+P(E)
        • Q(a);N_PINP(E),P_SPINQ(a),XS(H)::B(B)+P(E)
        • S(e);N_GUARD::QAR1(I)
        • S(e);N_GUARD::QAR1(I),XS(e)
      • Refutation
        • R(f);
    • Try
      • Q(I);CHECK
      • Vars
        • Q(a);N_GUARD,N_PINP(E),P_SPINQ(a)::QAR2(I),XQ(a)
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • Q(I);CHECK
      • Vars
        • K(b);P-FLIGHT::P(C)
      • Refutation
        • B(g);XQ(I)
    • Try
      • Q(I);CHECK
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAR1(I),XS(e)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(I);CHECK
      • Vars
        • K(b);P-FLIGHT::P(C)
      • Refutation
        • B(g);XQ(I)
  • Actual
    • B(D);
    • Threat
      • QAR1(I)
    • Vars
      • Q(a);CHECK,OGATE,P_SPINQ(a),XP(E)::B(B),XQ(a)
      • K(b);P-FLIGHT,P_SPINQ(a),XS(H)::QAB1(I)
      • Q(a);N_PINP(E),XS(G)::B(B)+P(E)
      • Q(a);N_PINP(E),P_SPINQ(a),XS(H)::B(B)+P(E)
      • S(e);N_GUARD::QAR1(I)
      • S(e);N_GUARD::QAR1(I),XS(e)
      • S(e);N_GUARD::QAR(I)
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).