MESON Chess Problem Database

Problem Display
PID: 6522 (8/7b/8/1K1B4/1NNk4/7Q/8/4r3 w - - 0 1)

Giegold, Fritz Emil

3rd Prize, Deutsche Schachblatter, 1931

8/7b/8/1K1B4/1NNk4/7Q/8/4r3

#2

5 + 3

136 Problem Observer 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qe3#
    • 1...Rb1
      • 2.Qe3#
    • 1...Rc1
      • 2.Qe3#
    • 1...Rd1
      • 2.Qe3#
    • 1...Rf1
      • 2.Qe3#
    • 1...Rg1
      • 2.Qe3#
    • 1...Rh1
      • 2.Qe3#
    • 1...Re3
      • 2.Qxe3#
    • 1...Re4
      • 2.Qd3#
    • 1...Bd3
      • 2.Qxd3#
    • 1...Be4
      • 2.Qh8#
    • 1...Bg8
      • 2.Qd3#
  • Tries
    • 1.Qa3?
      • threat
        • 2.Qb2#
      • 1...Rb1
        • 2.Qe3#
      • 1...Rc1
        • 2.Qe3#
      • 1...Re3
        • 2.Qxe3#
      • 1...Re2!
    • 1.Qb3?
      • threat
        • 2.Qb2#
      • 1...Rb1
        • 2.Qe3#
      • 1...Rc1
        • 2.Qe3#
      • 1...Re3
        • 2.Qxe3#
      • 1...Re2!
    • 1.Qf3?
      • threat
        • 2.Sc6#
      • 1...Re3
        • 2.Qxe3#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Rb1
        • 2.Qe3#
        • 2.Qf6#
      • 1...Re4
        • 2.Qd3#
      • 1...Be4
        • 2.Qf6#
      • 1...Re6!
  • Keys
    • 1.Be4!
      • threat
        • 2.Qd3#
      • 1...Kxe4
        • 2.Qg4#
      • 1...Bxe4
        • 2.Qh8#
      • 1...Re3
        • 2.Qxe3#
      • 1...Rd1
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 9
  • Sets
    • R(a);N_GUARD::QAB1(A)
    • R(a);N_GUARD,P_PINS(B)::QAB1(A)
    • R(a);N_GUARD::QAB1(A),XR(a)
    • R(a);S_CUTB(c)::QAR1(A)
    • B(c);N_GUARD,P_PINS(C)::QAR1(A),XB(c)
    • B(c);OGATE::QAB(A)
    • B(c);N_GUARD::QAR1(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • R(a);N_GUARD,P_PINS(B)::QAB1(A)
        • R(a);N_GUARD::QAB1(A)
        • R(a);N_GUARD::QAB1(A),XR(a)
      • Refutation
        • R(a);
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • R(a);N_GUARD::QAB1(A)
        • R(a);N_GUARD::QAB1(A),XR(a)
      • Refutation
        • R(a);
    • Try
      • Q(A);
      • Threat
        • S(B)
      • Vars
        • R(a);N_GUARD::QAB1(A),XR(a)
        • B(c);N_GUARD,P_PINS(C)::QAR1(A),XB(c)
        • R(a);S_CUTB(c)::QAR1(A)
        • B(c);S_CUTR(a)::QAB(A)
      • Refutation
        • R(a);
  • Actual
    • B(E);
    • Threat
      • QAR1(A)
    • Vars
      • K(b);OGATEB,P-FLIGHT,XB(E)::QAR2(A)
      • B(c);OGATE,SBLOCK,XB(E)::QAB(A)
      • R(a);N_GUARD::QAB1(A),XR(a)
      • R(a);N_GUARD::QAB1(A)
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