MESON Chess Problem Database

Problem Display
PID: 262160 (8/8/1p6/1p6/1P6/1p6/NP6/k1K4Q w - - 0 1)

Lipton, Michael

The Problemist, 1953

8/8/1p6/1p6/1P6/1p6/NP6/k1K4Q

#2

5 + 4

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kxa2
      • 2.Qa8#
    • 1...bxa2
      • 2.Kc2#
  • Tries
    • 1.Qg2?
      • 1...Kxa2
        • 2.Qa8#
      • 1...bxa2!
    • 1.Qf3?
      • 1...Kxa2
        • 2.Qa8#
      • 1...bxa2!
    • 1.Qe4?
      • threat
        • 2.Qb1#
      • 1...Kxa2
        • 2.Qb1#
        • 2.Qa8#
      • 1...bxa2!
    • 1.Qd5?
      • 1...Kxa2
        • 2.Qa8#
      • 1...bxa2!
    • 1.Qc6?
      • 1...Kxa2
        • 2.Qa8#
      • 1...bxa2!
    • 1.Qb7?
      • 1...Kxa2
        • 2.Qa6#
        • 2.Qa8#
        • 2.Qa7#
      • 1...bxa2!
    • 1.Qd1?
      • 1...bxa2
        • 2.Kc2#
      • 1...Kxa2!
    • 1.Qe1?
      • 1...bxa2
        • 2.Kc2#
      • 1...Kxa2!
    • 1.Qf1?
      • 1...bxa2
        • 2.Kc2#
      • 1...Kxa2!
    • 1.Qg1?
      • 1...bxa2
        • 2.Kc2#
      • 1...Kxa2!
    • 1.Qh7?
      • threat
        • 2.Qb1#
      • 1...Kxa2
        • 2.Qb1#
        • 2.Qa7#
      • 1...bxa2!
  • Keys
    • 1.Qh8!
      • 1...Kxa2
        • 2.Qa8#
      • 1...bxa2
        • 2.b3#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(a);OGATEB,P-FLIGHT,XS(C)::QAR(B)
    • P(b);SBLOCK,XS(C)::QAR(B)+K(A)
  • Tries
    • Try
      • Q(B);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XS(C)::QAR(B)
      • Refutation
        • P(b);XS(C)
    • Try
      • Q(B);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XS(C)::QAR(B)
      • Refutation
        • P(b);XS(C)
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Refutation
        • P(b);XS(C)
    • Try
      • Q(B);
      • Vars
        • K(a);OGATEB,P-FLIGHT,P_SPINP(b),XS(C)::QAR(B)
      • Refutation
        • P(b);XS(C)
    • Try
      • Q(B);
      • Vars
        • K(a);OGATEB,P-FLIGHT,XS(C)::QAR(B)
      • Refutation
        • P(b);XS(C)
    • Try
      • Q(B);
      • Refutation
        • P(b);XS(C)
    • Try
      • Q(B);
      • Vars
        • P(b);SBLOCK,XS(C)::QAR(B)+K(A)
      • Refutation
        • K(a);P-FLIGHT,XS(C)
    • Try
      • Q(B);
      • Vars
        • P(b);SBLOCK,XS(C)::QAR(B)+K(A)
      • Refutation
        • K(a);P-FLIGHT,XS(C)
    • Try
      • Q(B);
      • Vars
        • P(b);SBLOCK,XS(C)::QAR(B)+K(A)
      • Refutation
        • K(a);P-FLIGHT,XS(C)
    • Try
      • Q(B);
      • Vars
        • P(b);SBLOCK,XS(C)::QAR(B)+K(A)
      • Refutation
        • K(a);P-FLIGHT,XS(C)
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Refutation
        • P(b);XS(C)
  • Actual
    • Q(B);
    • Vars
      • K(a);OGATEB,P-FLIGHT,XS(C)::QAR(B)
      • P(b);OGATE,SBLOCK,XS(C)::QAB(B)+P(D)
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