MESON Chess Problem Database

Problem Display
PID: 74497 (3BB2n/r1Nnpp2/Pk4qR/p1pQ3R/P1p5/8/K7/8 w - - 0 1)

Gamage, Frederick

Comm., Washington Star, 1943

3BB2n/r1Nnpp2/Pk4qR/p1pQ3R/P1p5/8/K7/8

#2

9 + 10

5397 Frederick Gamage (Prcic) 2004
5454 Near Snap 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.Rxc6#
      • 2.Qxc6#
    • 1...Rxa6
      • 2.Sb5#
    • 1...Rb7
      • 2.Qxb7#
    • 1...Rxc7
      • 2.Qb7#
    • 1...Ra8
      • 2.Qb7#
    • 1...Sf6
      • 2.Qc6#
      • 2.Qxc5#
    • 1...Sb8
      • 2.Qxc5#
    • 1...Sf8
      • 2.Qxc5#
    • 1...e6
      • 2.Qd6#
    • 1...f6
      • 2.Qe6#
  • Tries
    • 1.Sb5+?
      • 1...Rc7
        • 2.Qb7#
      • 1...Kxa6!
    • 1.Se6+?
      • 1...Rc7
        • 2.Qb7#
      • 1...Kxa6!
    • 1.Rh2?
      • threat
        • 2.Rb2#
      • 1...Rxa6
        • 2.Sb5#
      • 1...Rxc7
        • 2.Qb7#
      • 1...Rb7
        • 2.Qxb7#
      • 1...Ra8
        • 2.Qb7#
      • 1...c3!
    • 1.Rxg6+?
      • 1...Sf6
        • 2.Qc6#
        • 2.Qxc5#
      • 1...e6
        • 2.Qd6#
      • 1...fxg6
        • 2.Qe6#
      • 1...f6
        • 2.Qe6#
      • 1...Sxg6!
  • Keys
    • 1.Rh1!
      • threat
        • 2.Rb1#
      • 1...Rxa6
        • 2.Sb5#
      • 1...Rxc7
        • 2.Qb7#
      • 1...Rb7
        • 2.Qxb7#
      • 1...Ra8
        • 2.Qb7#
      • 1...Sf6
        • 2.Qc6#
      • 1...e6
        • 2.Qd6#
      • 1...f6
        • 2.Qe6#

Anticipated by 63202(1926)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(f);N_GUARD,SBLOCK,XP(E)::B(H)+S(G)
    • R(f);N_GUARD::QAR1(C),XR(f)
    • R(f);N_GUARD,P_SPINR(f),XS(G)::QAR1(C)
    • R(f);N_GUARD::QAR1(C)
    • S(g);N_GUARD::QAB1(C),XP(c)
    • P(h);N_GUARD,N_SPINQ(e),S_CUTQ(e)::QAR2(C)
    • P(i);N_GUARD,N_SPINQ(e),S_CUTQ(e)::QAR(C)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • R(f);P_SPINR(f)::QAR1(C)
      • Refutation
        • K(d);P-FLIGHT,XP(E)
    • Try
      • S(G);CHECK,N_PINQ(e)
      • Vars
        • R(f);P_SPINR(f)::QAR1(C)
      • Refutation
        • K(d);P-FLIGHT,XP(E)
    • Try
      • R(D);
      • Threat
        • R(D)
      • Vars
        • R(f);N_GUARD,SBLOCK,XP(E)::B(H)+S(G)
        • R(f);N_GUARD,P_SPINR(f),XS(G)::QAR1(C)
        • R(f);N_GUARD::QAR1(C),XR(f)
        • R(f);N_GUARD::QAR1(C)
      • Refutation
        • P(a);
    • Try
      • R(F);CHECK,XQ(e)
      • Vars
        • P(h);N_GUARD,P_SPINP(h)::QAR2(C)
        • P(i);N_GUARD,XR(F)::QAR(C)
        • P(i);N_GUARD,P_SPINP(i)::QAR(C)
      • Refutation
        • S(j);XR(F)
  • Actual
    • R(D);
    • Threat
      • R(D)
    • Vars
      • R(f);N_GUARD,SBLOCK,XP(E)::B(H)+S(G)
      • R(f);N_GUARD,P_SPINR(f),XS(G)::QAR1(C)
      • R(f);N_GUARD::QAR1(C),XR(f)
      • R(f);N_GUARD::QAR1(C)
      • S(g);N_SPINQ(e),S_CUTQ(e)::QAR1(C)
      • P(h);N_GUARD,N_SPINQ(e),S_CUTQ(e)::QAR2(C)
      • P(i);N_GUARD,N_SPINQ(e),S_CUTQ(e)::QAR(C)
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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).