MESON Chess Problem Database

Problem Display
PID: 18057 (4R2b/2ppp2r/2PkN2N/8/3P1K2/7Q/q1b5/6BB w - - 0 1)

Fjellstrom, Zakarias

1st Prize, BCF, 1953-1954

4R2b/2ppp2r/2PkN2N/8/3P1K2/7Q/q1b5/6BB

#2

9 + 8

3105 FIDE Album (1945-1955) 1964

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe6
      • 2.Qa3#
    • 1...Rf7+
      • 2.Sxf7#
    • 1...Be5+
      • 2.dxe5#
    • 1...Bg7
      • 2.Sf7#
    • 1...dxc6
      • 2.Rd8#
    • 1...dxe6
      • 2.Rd8#
  • Keys
    • 1.Sg7!
      • threat
        • 2.Qxd7#
      • 1...Qf7+
        • 2.Sxf7#
      • 1...e5+
        • 2.dxe5#
      • 1...dxc6
        • 2.Rd8#
      • 1...Qe6
        • 2.Qa3#
      • 1...Bf5
        • 2.Shxf5#
      • 1...e6
        • 2.Sf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • Q(a);N_GUARD,SBLOCK,XS(G)::QAB(C)
    • R(g);CHECK,N_GUARD::S(H),XR(g)
    • B(h);CHECK,OGATE::P(D),XB(h)
    • B(h);S_CUTR(g)::S(H)
    • P(e);OGATEB,XP(F)::R(I)
    • P(e);OGATEB,XS(G)::R(I)
  • Actual
    • S(G);
    • Threat
      • QAR1(C),XP(e)
    • Vars
      • Q(a);CHECK,N_GUARD::S(H),XQ(a)
      • P(f);CHECK,OGATE::P(D),XP(f)
      • P(e);OGATEB,XP(F)::R(I)
      • Q(a);N_GUARD::QAB(C)
      • B(b);N_GUARD::S(H),XB(b)
      • P(f);S_CUTQ(a)::S(H)
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