MESON Chess Problem Database

Problem Display
PID: 17839 (4brrb/3p2N1/2pP3N/Q7/3p1k2/3P3P/5K2/8 w - - 0 1)

Froberg, Johan Hilding Laurentius

5th Prize, Goteborg Postens, 1951

4brrb/3p2N1/2pP3N/Q7/3p1k2/3P3P/5K2/8

#2

7 + 8

3105 FIDE Album (1945-1955) 1964

SOLUTION

  • SOUND
  • Sets
    • 1...Rf5
      • 2.Qxf5#
    • 1...Rf7
      • 2.Sh5#
    • 1...Bh5
      • 2.Sxh5#
    • 1...Bf7
      • 2.Qf5#
  • Tries
    • 1.Sg4?
      • threat
        • 2.Qd2#
        • 2.Qe5#
      • 1...Rxg7
        • 2.Qe5#
      • 1...Rf5
        • 2.Qd2#
        • 2.Qxf5#
      • 1...c5
        • 2.Qd2#
      • 1...Bxg7!
  • Keys
    • 1.Sf7!
      • threat
        • 2.Sh5#
        • 2.Qd2#
        • 2.Qe5#
        • 2.Qf5#
        • 2.Qg5#
      • 1...Rxf7
        • 2.Sh5#
      • 1...Rxg7
        • 2.Qe5#
      • 1...Bxf7
        • 2.Qf5#
      • 1...Bxg7
        • 2.Qg5#
      • 1...c5
        • 2.Qd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(f);N_GUARD::QAR1(D),XR(f)
    • R(f);S_CUTB(e)::S(G)
    • B(e);N_GUARD::S(G),XB(e)
    • B(e);S_CUTR(f)::QAR1(D)
  • Tries
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • R(g);XS(G)::QAB1(D)
        • P(c);::QAB(D)
      • Refutation
        • B(h);XS(G)
  • Actual
    • S(F);
    • Threat
      • DUALS(5)
    • Vars
      • R(f);XS(F)::S(G)
      • R(g);XS(G)::QAB1(D)
      • B(e);XS(F)::QAR1(D)
      • B(h);XS(G)::QAB1(D)
      • P(c);::QAB(D)
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