MESON Chess Problem Database

Problem Display
PID: 33466 (Qn1N4/1Pk5/1p2K3/8/8/8/8/8 w - - 0 1)

Rice, John Michael

The Problemist Supplement, 2001

Qn1N4/1Pk5/1p2K3/8/8/8/8/8

#2

4 + 3

5454 Near Snap 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd8
      • 2.Qxb8#
    • 1...Sa6
      • 2.Qc8#
    • 1...Sc6
      • 2.Qc8#
    • 1...Sd7
      • 2.Qc8#
    • 1...b5
      • 2.Qa5#
  • Tries
    • 1.Ke7?
      • 1...b5
        • 2.Qa5#
      • 1...Sa6
        • 2.Qc8#
      • 1...Sd7
        • 2.Qc8#
      • 1...Sc6+!
    • 1.Qa3?
      • threat
        • 2.Qd6#
      • 1...Kxd8
        • 2.Qe7#
      • 1...Sd7!
  • Keys
    • 1.Qa7!
      • 1...Kxd8
        • 2.Qxb8#
      • 1...Sa6
        • 2.b8Q#
        • 2.b8R#
      • 1...Sc6
        • 2.b8Q#
      • 1...Sd7
        • 2.b8Q#
        • 2.b8R#
      • 1...b5
        • 2.Qa5#

Anticipated by 120900(1955)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • K(b);P_SPINS(c),S_FLIGHT,XS(D)::QAR2(C),XS(c)
    • S(c);OGATE::QAR1(C)
    • P(a);OGATEB::QAB(C)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • P(a);OGATEB::QAB(C)
        • S(c);OGATE::QAR1(C)
      • Refutation
        • S(c);CHECK
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • K(b);S_FLIGHT,XS(D)::QAB1(C)
      • Refutation
        • S(c);
  • Actual
    • Q(C);
    • Vars
      • K(b);S_FLIGHT,XS(D)::QAR2(C),XS(c)
      • S(c);OGATE::P=Q
      • P(a);OGATEB::QAB(C)
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