MESON Chess Problem Database

Problem Display
PID: 8004 (k1K5/2n5/P7/n1B5/3Q4/8/8/8 w - - 0 1)

Rice, John Michael

Chess Problems for Solving, 1995

k1K5/2n5/P7/n1B5/3Q4/8/8/8

#2

4 + 3

5454 Near Snap 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Sb7
      • 2.axb7#
  • Tries
    • 1.Kxc7?
      • threat
        • 2.Qh8#
        • 2.Qd8#
      • 1...Sb7
        • 2.axb7#
      • 1...Sc6!
    • 1.Qe4+?
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sb7
        • 2.Qxb7#
        • 2.axb7#
      • 1...Sd5!
    • 1.Qd5+?
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sb7
        • 2.Qxb7#
        • 2.axb7#
      • 1...Sxd5!
    • 1.Qd7?
      • 1...Sxa6
        • 2.Qa7#
      • 1...Sb3
        • 2.Qc6#
      • 1...Sc4
        • 2.Qc6#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sb7
        • 2.axb7#
      • 1...Sd5
        • 2.Qa7#
      • 1...Se6
        • 2.Qa7#
      • 1...Se8
        • 2.Qa7#
      • 1...Sb5!
  • Keys
    • 1.Qd6!
      • 1...Sxa6
        • 2.Qxa6#
      • 1...Sb3
        • 2.Qc6#
      • 1...Sc4
        • 2.Qc6#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sb7
        • 2.axb7#
      • 1...Sb5
        • 2.Qb8#
      • 1...Sd5
        • 2.Qb8#
      • 1...Se6
        • 2.Qb8#
      • 1...Se8
        • 2.Qb8#

Anticipated by 29778(1963)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • S(a);OGATE::P(C),XS(a)
  • Tries
    • Try
      • K(D);P-FLIGHT,XS(b)
      • Threat
        • DUALS(2)
      • Vars
        • S(a);OGATE::P(C),XS(a)
      • Refutation
        • S(a);
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB(A),XS(a)
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB(A),XS(a)
      • Refutation
        • S(b);XQ(A)
    • Try
      • Q(A);
      • Vars
        • S(b);OGATE,XP(C)::QAR1(A)
        • S(a);N_GUARD::QAB(A)
        • S(a);N_GUARD::QAB(A),XS(a)
        • S(a);OGATE::P(C),XS(a)
        • S(b);OGATE::QAR1(A)
      • Refutation
        • S(b);
  • Actual
    • Q(A);
    • Vars
      • S(b);OGATE,XP(C)::QAR2(A),XS(b)
      • S(a);N_GUARD::QAB(A)
      • S(a);N_GUARD::QAB(A),XS(a)
      • S(a);OGATE::P(C),XS(a)
      • S(b);OGATE::QAR1(A)
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