MESON Chess Problem Database

Problem Display
PID: 139555 (4n3/4NN1R/2P1k2p/b3P1B1/K3p1rr/p1p1p2B/2n5/7Q w - - 0 1)

Masek, Zdenek

Probleemblad, 1974

4n3/4NN1R/2P1k2p/b3P1B1/K3p1rr/p1p1p2B/2n5/7Q

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rh5
      • 2.Bxg4#
  • Tries
    • 1.Qd1?
      • threat
        • 2.Qd5#
        • 2.Qd7#
      • 1...hxg5
        • 2.Qd7#
      • 1...Sf6
        • 2.Qd6#
      • 1...Sg7
        • 2.Qd5#
      • 1...Sb4
        • 2.Qd7#
      • 1...Sd6
        • 2.Qd5#
        • 2.Qxd6#
      • 1...Sc7
        • 2.Qd6#
        • 2.Qd7#
      • 1...Sd4!
    • 1.Qf1?
      • threat
        • 2.Qc4#
        • 2.Qf5#
      • 1...Sf6
        • 2.Qxf6#
      • 1...Sb4
        • 2.Qf5#
      • 1...Sd4
        • 2.Qc4#
      • 1...Sd6
        • 2.Qf6#
      • 1...Sc7
        • 2.Qf5#
        • 2.Qf6#
      • 1...Sg7
        • 2.Qc4#
        • 2.Qf6#
      • 1...e2
        • 2.Qf5#
      • 1...hxg5!
  • Keys
    • 1.Qxe4!
      • threat
        • 2.Qc4#
      • 1...Rxh3
        • 2.Qxg4#
      • 1...hxg5
        • 2.Sxg5#
      • 1...Sf6
        • 2.exf6#
      • 1...Sb4
        • 2.Qf5#
      • 1...Sd4
        • 2.Qd5#
      • 1...Sd6
        • 2.exd6#
      • 1...Sc7
        • 2.Sd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • R(g);N_GUARD::B(B),XR(f)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(j);XB(E)::QAB1(A)
        • S(k);N_GUARD::QAR1(A)
        • S(k);::QAB1(A)
        • S(a);::QAB1(A)
      • Refutation
        • S(a);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(k);N_GUARD::QAR1(A),XS(k)
        • S(a);::QAB1(A)
        • S(a);::QAB(A)
        • S(k);N_GUARD::QAR1(A)
        • P(d);::QAB1(A)
      • Refutation
        • P(j);XB(E)
  • Actual
    • Q(A);P_SPINQ(A),XP(e)
    • Threat
      • QAB(A)
    • Vars
      • R(g);N_GUARD,N_SPINR(f),XB(B)::QAB(A),XR(f)
      • P(j);XB(E)::S(H),XP(j)
      • S(k);OGATE::QAR(A)+P(D),XS(k)
      • S(a);N_PINQ(A)::QAB1(A)
      • S(k);S_CUTB(h)::S(H)
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