MESON Chess Problem Database

Problem Display
PID: 2826 (8/k7/N7/2K5/8/6p1/6Q1/8 w - - 0 1)

Abbott, Joseph William

Source?, 1875

8/k7/N7/2K5/8/6p1/6Q1/8

#2

3 + 2

5454 Near Snap 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxa6
      • 2.Qa8#
  • Tries
    • 1.Qh1?
      • 1...Kxa6
        • 2.Qa8#
      • 1...g2!
    • 1.Qf3?
      • 1...Kxa6
        • 2.Qa8#
      • 1...g2!
    • 1.Qe4?
      • 1...Kxa6
        • 2.Qa8#
      • 1...g2!
    • 1.Qd5?
      • 1...Kxa6
        • 2.Qa8#
      • 1...g2!
    • 1.Qb2?
      • 1...Kxa6
        • 2.Qb6#
      • 1...Ka8
        • 2.Qb8#
      • 1...g2!
  • Keys
    • 1.Kc6!
      • 1...Kxa6
        • 2.Qa2#
      • 1...Ka8
        • 2.Kb6#

This anticipates 21927(1922), 227471(1926), 90326(1964)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT,XS(C)::QAR2(A)
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT,XS(C)::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT,XS(C)::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT,XS(C)::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT,XS(C)::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT,XS(C)::QAR1(A)
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • P(a);
  • Actual
    • K(B);P-FLIGHT
    • Vars
      • K(b);OGATEB,P-FLIGHT,XS(C)::QAR(A)
      • K(b);P-FLIGHT::QAB(A)+K(B)
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