MESON Chess Problem Database

Problem Display
PID: 54369 (8/4p3/7K/5kB1/3Q4/2N3n1/8/8 w - - 0 1)

Lincoln, Robert A

Comm., Amirov MT, 2003

8/4p3/7K/5kB1/3Q4/2N3n1/8/8

#2

4 + 3

145 StrateGems 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Qd5#
    • 1...Sf1
      • 2.Qe4#
    • 1...Sh1
      • 2.Qe4#
    • 1...Se2
      • 2.Qe4#
    • 1...Se4
      • 2.Qxe4#
    • 1...Sh5
      • 2.Qe4#
    • 1...e5
      • 2.Qd7#
    • 1...e6
      • 2.Qf4#
  • Tries
    • 1.Bxe7?
      • 1...Se4
        • 2.Qxe4#
      • 1...Sf1
        • 2.Qe4#
      • 1...Sh1
        • 2.Qe4#
      • 1...Se2
        • 2.Qe4#
      • 1...Sh5
        • 2.Qe4#
      • 1...Ke6!
    • 1.Qc5+?
      • 1...Ke6
        • 2.Qd5#
      • 1...e5
        • 2.Qc8#
      • 1...Kg4!
    • 1.Qd3+?
      • 1...Ke5
        • 2.Qd5#
      • 1...Ke6
        • 2.Qd5#
      • 1...Se4
        • 2.Qxe4#
      • 1...Kg4!
    • 1.Qd5+?
      • 1...e5
        • 2.Qd7#
      • 1...Kg4!
    • 1.Qd7+?
      • 1...Ke5
        • 2.Qd5#
      • 1...e6!
  • Keys
    • 1.Qc4!
      • 1...Ke5
        • 2.Qd5#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sf1
        • 2.Qe4#
      • 1...Sh1
        • 2.Qe4#
      • 1...Se2
        • 2.Qe4#
      • 1...Sh5
        • 2.Qe4#
      • 1...e5
        • 2.Qc8#
      • 1...e6
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(b);S_FLIGHT::QAB1(B)
    • S(a);N_GUARD::QAB1(B)
    • S(a);N_GUARD::QAB1(B),XS(a)
    • P(c);N_GUARD,SBLOCK::QAB(B)
    • P(c);SBLOCK::QAR1(B)
  • Tries
    • Try
      • B(C);XP(c)
      • Vars
        • S(a);N_GUARD::QAB1(B),XS(a)
        • S(a);N_GUARD::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(B)
        • P(c);N_GUARD,P_SPINP(c),SBLOCK::QAB(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
        • K(b);S_FLIGHT::QAB1(B)
        • S(a);N_GUARD,P_SPINS(a)::QAB1(B),XS(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • P(c);N_GUARD,P_SPINP(c),SBLOCK::QAB(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • P(c);P_SPINP(c)
  • Actual
    • Q(B);
    • Vars
      • K(b);P-FLIGHT::QAR1(B)
      • S(a);N_GUARD::QAB1(B),XS(a)
      • S(a);N_GUARD::QAB1(B)
      • P(c);N_GUARD,SBLOCK::QAB(B)
      • P(c);SBLOCK::QAR1(B)
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