MESON Chess Problem Database

Problem Display
PID: 16788 (Q3N3/7q/1p3rR1/1kn5/3n4/2BR4/1N3b2/1K3B2 w - - 0 1)

Hassberg, Eric Manfred

3rd Prize, Christian Science Monitor, 1943

Q3N3/7q/1p3rR1/1kn5/3n4/2BR4/1N3b2/1K3B2

#2

8 + 7

102 Probleemblad 1977

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg6
      • 2.Sc7#
    • 1...Qg8
      • 2.Sc7#
    • 1...Qh1
      • 2.Sc7#
    • 1...Qh3
      • 2.Sc7#
    • 1...Qh4
      • 2.Sc7#
    • 1...Qh5
      • 2.Sc7#
    • 1...Qh6
      • 2.Sc7#
    • 1...Qc7
      • 2.Sxc7#
    • 1...Qh8
      • 2.Sc7#
    • 1...Rf3
      • 2.Sd6#
    • 1...Rf4
      • 2.Sd6#
    • 1...Rf5
      • 2.Sd6#
    • 1...Rd6
      • 2.Sxd6#
    • 1...Rf7
      • 2.Sd6#
    • 1...Rf8
      • 2.Sd6#
    • 1...Sc2
      • 2.Rd5#
    • 1...Sdb3
      • 2.Rd5#
    • 1...Sf3
      • 2.Rd5#
    • 1...Sf5
      • 2.Rd5#
    • 1...Sc6
      • 2.Rd5#
    • 1...Sde6
      • 2.Sd6#
      • 2.Rd5#
  • Tries
    • 1.Re3+?
      • 1...Sd3
        • 2.Re5#
      • 1...Se2!
  • Keys
    • 1.Rg5!
      • threat
        • 2.Qa4#
      • 1...Qxd3+
        • 2.Bxd3#
      • 1...Qa7
        • 2.Rxd4#
      • 1...Qf5
        • 2.Sc7#
      • 1...Rf5
        • 2.Sd6#
      • 1...Sf5
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 18
  • Sets
    • Q(g);N_GUARD,P_PINR(E),XR(F)::S(H)
    • Q(g);N_GUARD::S(H)
    • Q(g);N_GUARD,P_PINB(B)::S(H)
    • Q(g);N_GUARD::S(H),XQ(g)
    • R(f);N_GUARD::S(H)
    • R(f);N_GUARD::S(H),XR(f)
    • S(b);OGATE::B(B)+R(E)
  • Tries
    • Try
      • R(E);CHECK,P_SPINR(F)
      • Vars
        • S(d);N_PINR(F),P_SPINS(d),S_CUTS(b)::R(E)
      • Refutation
        • S(b);P_SPINS(b)
  • Actual
    • R(F);P_PINS(d),P_SPINR(E)
    • Threat
      • QAB1(G)
    • Vars
      • Q(g);CHECK,OGATE,P_SPINQ(g),XR(E)::B(B),XQ(g)
      • Q(g);N_PINR(E)::B(B)+R(E),XS(b)
      • Q(g);N_GUARD,N_SPINS(d)::S(H)
      • R(f);N_GUARD,N_PINR(E),N_SPINS(d)::S(H)
      • S(b);N_PINR(E),N_SPINS(d)::B(B)+R(E)
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