MESON Chess Problem Database

Problem Display
PID: 203325 (8/8/2p2Kp1/2PN1pP1/1P1krR2/3p1R2/3N4/7Q w - - 0 1)

Packer, GFH

4th Prize, Falkirk Herald, 1924

8/8/2p2Kp1/2PN1pP1/1P1krR2/3p1R2/3N4/7Q

#2

9 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd5
      • 2.Rxd3#
    • 1...Rxf4
      • 2.Rxf4#
    • 1...cxd5
      • 2.Qa1#
  • Tries
    • 1.Rg3?
      • 1...Kxd5
        • 2.Rxd3#
      • 1...cxd5
        • 2.Qa1#
      • 1...Rxf4!
    • 1.Rh3?
      • 1...Kxd5
        • 2.Rxd3#
      • 1...cxd5
        • 2.Qa1#
      • 1...Rxf4!
    • 1.Rxe4+?
      • 1...Kxd5
        • 2.Rxd3#
      • 1...fxe4!
    • 1.Qg2?
      • 1...Kxd5
        • 2.Rxd3#
      • 1...Rxf4
        • 2.Rxf4#
      • 1...cxd5!
    • 1.Qc1?
      • threat
        • 2.Qc4#
      • 1...cxd5
        • 2.Sb3#
        • 2.Qb2#
        • 2.Qa1#
      • 1...Kxd5!
    • 1.Qe1?
      • 1...Rxf4
        • 2.Qe5#
      • 1...cxd5
        • 2.Qa1#
      • 1...Kxd5!
  • Keys
    • 1.Qh8!
      • 1...Kxd5
        • 2.Qd8#
      • 1...Rxf4
        • 2.Ke6#
      • 1...cxd5
        • 2.Kxg6#
        • 2.Kf7#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • K(b);N_SPINR(c),P-FLIGHT,XS(G)::R(C),XP(a)
    • R(c);N_SPINR(c),OGATE,XR(E)::R(C),XR(c)
    • P(e);SBLOCK,XS(G)::QAB(A)
  • Tries
    • Try
      • R(C);
      • Vars
        • K(b);P-FLIGHT,XS(G)::R(C),XP(a)
        • P(e);SBLOCK,XS(G)::QAB(A)
      • Refutation
        • R(c);N_SPINR(c),XR(E)
    • Try
      • R(C);
      • Vars
        • K(b);P-FLIGHT,XS(G)::R(C),XP(a)
        • P(e);SBLOCK,XS(G)::QAB(A)
      • Refutation
        • R(c);N_SPINR(c),XR(E)
    • Try
      • R(E);CHECK,XR(c)
      • Vars
        • K(b);P-FLIGHT,XS(G)::R(C),XP(a)
      • Refutation
        • P(d);XR(E)
    • Try
      • Q(A);
      • Vars
        • K(b);N_SPINR(c),P-FLIGHT,XS(G)::R(C),XP(a)
        • R(c);N_SPINR(c),OGATE,XR(E)::R(C),XR(c)
      • Refutation
        • P(e);XS(G)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Refutation
        • K(b);N_SPINR(c),P-FLIGHT,XS(G)
    • Try
      • Q(A);
      • Vars
        • R(c);N_SPINR(c),OGATE,XR(E)::QAB1(A)
        • P(e);SBLOCK,XS(G)::QAB(A)
      • Refutation
        • K(b);N_SPINR(c),P-FLIGHT,XS(G)
  • Actual
    • Q(A);
    • Vars
      • K(b);N_SPINR(c),OGATEB,P-FLIGHT,XS(G)::QAR(A)
      • R(c);N_SPINR(c),XR(E)::QAB(A)+K(I)
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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).