MESON Chess Problem Database

Problem Display
PID: 6225 (5B2/bpQ5/b4P2/3N1pq1/p2k2p1/n1N1R3/1PP2P2/2K5 w - - 0 1)

Gross, J

1st Prize, Bristol Times and Mirror, 1928/II

5B2/bpQ5/b4P2/3N1pq1/p2k2p1/n1N1R3/1PP2P2/2K5

#2

10 + 9

20 De Problemist 1929
1397 Faszinierendes Schachproblem 1963

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe3+
      • 2.fxe3#
    • 1...Qf4
      • 2.Qxf4#
    • 1...Qh4
      • 2.Qf4#
    • 1...Qxf6
      • 2.Qf4#
    • 1...Qh5
      • 2.Qf4#
    • 1...Qg6
      • 2.Qf4#
    • 1...Qg7
      • 2.Qf4#
    • 1...Qg8
      • 2.Qf4#
    • 1...Bc4
      • 2.Qe5#
    • 1...Bc5
      • 2.Qxc5#
    • 1...Bb8
      • 2.Qc5#
    • 1...f4
      • 2.Re4#
  • Tries
    • 1.Bc5+?
      • 1...Kc4
        • 2.Bb6#
        • 2.Bxa7#
      • 1...Bxc5!
    • 1.Qb6+?
      • 1...Kc4
        • 2.Qb4#
      • 1...Bxb6!
  • Keys
    • 1.Qd6!
      • threat
        • 2.Sb6#
      • 1...Qxe3+
        • 2.Sxe3#
      • 1...Kc4
        • 2.Qb4#
      • 1...Qxf6
        • 2.Qf4#
      • 1...Qf4
        • 2.Qxf4#
      • 1...Qg8
        • 2.Qf4#
      • 1...Bc4
        • 2.Qe5#
      • 1...Bc5
        • 2.Qxc5#
      • 1...Bb6
        • 2.Sxb6#
      • 1...Bb8
        • 2.Qc5#
      • 1...Sc4
        • 2.Se2#
      • 1...Sb5
        • 2.Qb4#
      • 1...f4
        • 2.Re4#
      • 1...b6
        • 2.Sxb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • Q(f);CHECK,OGATE,XR(F)::P(D),XQ(f)
    • Q(f);N_GUARD::QAR2(I),XQ(f)
    • Q(f);N_GUARD,N_PINR(F)::QAR2(I)
    • Q(f);N_GUARD,N_PINR(F),XP(H)::QAR2(I)
    • B(g);SBLOCK::QAB1(I)
    • B(h);N_GUARD::QAB1(I),XB(h)
    • B(h);N_GUARD::QAB1(I)
    • P(e);N_PINR(F)::R1(F)
  • Tries
    • Try
      • B(J);CHECK
      • Refutation
        • B(h);XB(J)
    • Try
      • Q(I);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR1(I)
      • Refutation
        • B(h);XQ(I)
  • Actual
    • Q(I);
    • Threat
      • QAR(I)+S(G)
    • Vars
      • Q(f);CHECK,XR(F)::QAR(I)+S(G),XQ(f)
      • K(c);P-FLIGHT::QAR1(I)
      • Q(f);N_GUARD,N_PINR(F),XP(H)::QAR2(I)
      • Q(f);N_GUARD::QAR2(I),XQ(f)
      • Q(f);N_GUARD,N_PINR(F)::QAR2(I)
      • B(g);SBLOCK::QAB1(I)
      • B(h);N_GUARD::QAB1(I),XB(h)
      • B(h);::QAR(I)+S(G),XB(h)
      • B(h);N_GUARD::QAB1(I)
      • S(a);SBLOCK,S_CUTB(g)::S(E)
      • S(a);N_GUARD,S_CUTB(g)::QAR2(I)
      • P(e);N_PINR(F)::R1(F)
      • P(i);::QAR(I)+S(G),XP(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).