MESON Chess Problem Database

Problem Display
PID: 8000 (8/8/8/8/3B1K2/7p/3nQ3/7k w - - 0 1)

Rice, John Michael

Chess Problems for Solving, 1995

8/8/8/8/3B1K2/7p/3nQ3/7k

#2

3 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Qd1+?
      • 1...Kg2
        • 2.Qg1#
      • 1...Kh2
        • 2.Qg1#
      • 1...Sf1!
    • 1.Qf1+?
      • 1...Kh2
        • 2.Qg1#
      • 1...Sxf1!
    • 1.Qe1+?
      • 1...Kg2
        • 2.Qg1#
      • 1...Kh2
        • 2.Qg1#
      • 1...Sf1!
  • Keys
    • 1.Kg3!
      • threat
        • 2.Qh2#
      • 1...Sf1+
        • 2.Qxf1#
      • 1...Se4+
        • 2.Qxe4#
      • 1...Sf3
        • 2.Qxf3#
      • 1...h2
        • 2.Qg2#
        • 2.Qxh2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
        • K(a);P-FLIGHT::QAB1(A)
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
      • Refutation
        • S(b);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(A)
        • K(a);P-FLIGHT::QAB1(A)
      • Refutation
        • S(b);P_SPINS(b)
  • Actual
    • K(C);S_FLIGHT
    • Threat
      • QAR1(A)
    • Vars
      • S(b);CHECK,N_GUARD::QAR2(A),XS(b)
      • S(b);CHECK,N_GUARD::QAB(A),XS(b)
      • S(b);N_GUARD::QAB(A),XS(b)
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