MESON Chess Problem Database

Problem Display
PID: 230761 (8/6Q1/5p2/8/8/K2Pp3/3k4/1BR5 w - - 0 1)

Staudte, Hans Hilmar

Deutsche Schachzeitung, 1967

8/6Q1/5p2/8/8/K2Pp3/3k4/1BR5

#2

5 + 3

5454 Near Snap 2021
15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke2
      • 2.Qg2#
    • 1...e2
      • 2.Qh6#
    • 1...f5
      • 2.Qb2#
  • Tries
    • 1.Ka2?
      • 1...Ke2
        • 2.Qg2#
      • 1...e2
        • 2.Qh6#
      • 1...f5
        • 2.Qb2#
      • 1...Kxc1!
    • 1.Kb2?
      • 1...Ke2
        • 2.Qg2#
      • 1...e2
        • 2.Qh6#
      • 1...f5!
    • 1.Kb3?
      • 1...Ke2
        • 2.Qg2#
      • 1...e2
        • 2.Qh6#
      • 1...f5
        • 2.Qb2#
      • 1...Kxc1!
    • 1.Ka4?
      • 1...Ke2
        • 2.Qg2#
      • 1...e2
        • 2.Qh6#
      • 1...f5
        • 2.Qb2#
      • 1...Kxc1!
    • 1.Kb4?
      • 1...Ke2
        • 2.Qg2#
      • 1...e2
        • 2.Qh6#
      • 1...f5
        • 2.Qb2#
      • 1...Kxc1!
    • 1.Rc2+?
      • 1...Kd1
        • 2.Qg1#
      • 1...Ke1
        • 2.Qg1#
      • 1...Kxd3!
    • 1.Qg1?
      • threat
        • 2.Qd1#
        • 2.Qe1#
      • 1...Ke2
        • 2.Qg2#
      • 1...e2!
    • 1.Qg2+?
      • 1...Kxc1
        • 2.Qc2#
      • 1...e2!
    • 1.Qg4?
      • threat
        • 2.Qd1#
      • 1...e2
        • 2.Qf4#
      • 1...Kxc1!
    • 1.Qc7?
      • threat
        • 2.Qc2#
      • 1...e2
        • 2.Qf4#
      • 1...Ke2!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Qe1#
      • 1...Kxc1
        • 2.Qe1#
      • 1...Ke2
        • 2.Qg2#
      • 1...e2
        • 2.Qf4#

This anticipates 176185(1967), 199779(2013)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(a);P-FLIGHT::QAR2(E)
    • P(b);OGATEB,SBLOCK::QAB(E)
    • P(c);OGATE::QAR2(E)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR2(E)
        • P(b);OGATEB,SBLOCK::QAB(E)
        • P(c);OGATE::QAR2(E)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • K(C);S_FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR2(E)
        • P(b);OGATEB,SBLOCK::QAB(E)
      • Refutation
        • P(c);
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR2(E)
        • P(b);OGATEB,SBLOCK::QAB(E)
        • P(c);OGATE::QAR2(E)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR2(E)
        • P(b);OGATEB,SBLOCK::QAB(E)
        • P(c);OGATE::QAR2(E)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • K(C);S_FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR2(E)
        • P(b);OGATEB,SBLOCK::QAB(E)
        • P(c);OGATE::QAR2(E)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • R(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR(E)
        • K(a);S_FLIGHT::QAR2(E)
      • Refutation
        • K(a);P-FLIGHT,XP(D)
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR2(E)
      • Refutation
        • P(b);
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XR(B)::QAR1(E)
      • Refutation
        • P(b);P_SPINP(b)
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • P(b);OGATEB,SBLOCK::QAB(E)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • P(b);OGATEB,SBLOCK::QAB(E)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(E);
    • Threat
      • QAB1(E)
    • Vars
      • K(a);S_FLIGHT,XR(B)::QAR2(E)
      • K(a);P-FLIGHT::QAR2(E)
      • P(b);OGATEB,SBLOCK::QAB(E)
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