MESON Chess Problem Database

Problem Display
PID: 573 (7n/6pr/4B1k1/4K1B1/5Q2/8/8/8 w - - 0 1)

Miller, Andrew C

The Observer, 1965

7n/6pr/4B1k1/4K1B1/5Q2/8/8/8

#2

4 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Rh5
      • 2.Qf5#
    • 1...Sf7+
      • 2.Bxf7#
  • Tries
    • 1.Bf5+?
      • 1...Kh5
        • 2.Qg4#
        • 2.Qh4#
      • 1...Kf7!
  • Keys
    • 1.Bh6!
      • threat
        • 2.Qg5#
      • 1...Sf7+
        • 2.Bxf7#
      • 1...Kh5
        • 2.Qg5#
      • 1...Rxh6
        • 2.Qf5#
      • 1...gxh6
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(c);P_PINB(C),SBLOCK::QAB1(A)
    • S(d);CHECK,N_GUARD::B(D),XS(d)
  • Tries
    • Try
      • B(D);CHECK
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • B(C);
    • Threat
      • QAR1(A)
    • Vars
      • S(d);CHECK,N_GUARD::B(D),XS(d)
      • K(a);S_FLIGHT::QAR1(A)
      • R(c);SBLOCK,XB(C)::QAB1(A)
      • P(b);SBLOCK,XB(C)::QAR2(A)
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