MESON Chess Problem Database

Problem Display
PID: 210069 (QK5k/6Rp/3pb3/1p3p2/5p2/8/8/B3q3 w - - 0 1)

Giegold, Fritz Emil

Deutsche Schachblatter, 1952

QK5k/6Rp/3pb3/1p3p2/5p2/8/8/B3q3

#2

4 + 8

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qg3
      • 2.Rxg3#
    • 1...Qh4
      • 2.Rg5#
    • 1...Qg1
      • 2.Rxg1#
    • 1...Qh1
      • 2.Rg1#
  • Tries
    • 1.Ka7+?
      • 1...Bg8
        • 2.Rxg8#
        • 2.Qxg8#
      • 1...Bc8!
    • 1.Kb7+?
      • 1...Bg8
        • 2.Rxg8#
        • 2.Qxg8#
      • 1...Bc8+!
    • 1.Kc7+?
      • 1...Bg8
        • 2.Rxg8#
        • 2.Qxg8#
      • 1...Bc8!
    • 1.Rg1+?
      • 1...Qc3
        • 2.Bxc3#
      • 1...Qxa1
        • 2.Qxa1#
      • 1...Qe5!
    • 1.Rg2+?
      • 1...Qc3
        • 2.Bxc3#
      • 1...Qxa1
        • 2.Qxa1#
      • 1...Qe5!
    • 1.Rg3+?
      • 1...Qc3
        • 2.Bxc3#
      • 1...Qxa1
        • 2.Qxa1#
      • 1...Qe5!
    • 1.Rg4+?
      • 1...Qc3
        • 2.Bxc3#
      • 1...Qxa1
        • 2.Qxa1#
      • 1...Qe5!
    • 1.Rg5+?
      • 1...Qc3
        • 2.Bxc3#
      • 1...Qxa1
        • 2.Qxa1#
      • 1...Qe5!
    • 1.Rg6+?
      • 1...Qc3
        • 2.Bxc3#
      • 1...Qxa1
        • 2.Qxa1#
      • 1...Qe5!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Qxh7#
      • 1...Qxh1
        • 2.Rg1#
      • 1...Qh4
        • 2.Rg5#
      • 1...Bg8
        • 2.Rxh7#
      • 1...h5
        • 2.Qxh5#
      • 1...h6
        • 2.Qxh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(a);N_GUARD::B(A)+R(B),XQ(a)
    • Q(a);N_GUARD::B(A)+R(B)
  • Tries
    • Try
      • K(D);CHECK,S_FLIGHT
      • Refutation
        • B(f);P_SPINB(f)
    • Try
      • K(D);CHECK,P-FLIGHT
      • Refutation
        • B(f);CHECK,P_SPINB(f)
    • Try
      • K(D);CHECK,S_FLIGHT
      • Refutation
        • B(f);P_SPINB(f)
    • Try
      • R(B);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::B(A),XQ(a)
        • Q(a);OGATE,XB(A)::QAB(C),XQ(a)
      • Refutation
        • Q(a);P_SPINQ(a)
    • Try
      • R(B);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::B(A),XQ(a)
        • Q(a);OGATE,XB(A)::QAB(C),XQ(a)
      • Refutation
        • Q(a);P_SPINQ(a)
    • Try
      • R(B);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::B(A),XQ(a)
        • Q(a);OGATE,XB(A)::QAB(C),XQ(a)
      • Refutation
        • Q(a);P_SPINQ(a)
    • Try
      • R(B);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::B(A),XQ(a)
        • Q(a);OGATE,XB(A)::QAB(C),XQ(a)
      • Refutation
        • Q(a);P_SPINQ(a)
    • Try
      • R(B);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::B(A),XQ(a)
        • Q(a);OGATE,XB(A)::QAB(C),XQ(a)
      • Refutation
        • Q(a);P_SPINQ(a)
    • Try
      • R(B);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::B(A),XQ(a)
        • Q(a);OGATE,XB(A)::QAB(C),XQ(a)
      • Refutation
        • Q(a);P_SPINQ(a)
  • Actual
    • Q(C);P_PINP(g)
    • Threat
      • QAR1(C),XP(g)
    • Vars
      • Q(a);N_GUARD,N_SPINP(g),XQ(C)::B(A)+R(B)
      • Q(a);N_GUARD,N_SPINP(g)::B(A)+R(B)
      • B(f);SBLOCK::B(A)+R(B),DCHECK,XP(g)
      • P(g);OGATEB::QAR(C),XP(g)
      • P(g);OGATEB::QAR2(C),XP(g)
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