MESON Chess Problem Database

Problem Display
PID: 153202 (6BN/6r1/8/7k/6p1/6K1/3Q4/8 w - - 0 1)

Lincoln, Robert A

StrateGems, 2011

6BN/6r1/8/7k/6p1/6K1/3Q4/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Rg5
      • 2.Qh2#
    • 1...Rf7
      • 2.Bxf7#
  • Tries
    • 1.Bf7+?
      • 1...Rg6
        • 2.Bxg6#
      • 1...Rxf7!
    • 1.Qd5+?
      • 1...Rg5
        • 2.Qh1#
      • 1...Kh6!
  • Keys
    • 1.Sf7!
      • threat
        • 2.Qh6#
      • 1...Kg6
        • 2.Qg5#
      • 1...Rxf7
        • 2.Bxf7#
      • 1...Rg5
        • 2.Qxg5#
      • 1...Rg6
        • 2.Qh2#
      • 1...Rh7
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(c);SBLOCK::QAR(A)
    • R(c);N_GUARD::B(C),XR(c)
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::B(C),XR(c)
      • Refutation
        • R(c);XB(C)
    • Try
      • Q(A);CHECK
      • Vars
        • R(c);P_SPINR(c),SBLOCK::QAR(A)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • S(D);
    • Threat
      • QAR1(A)
    • Vars
      • K(b);S_FLIGHT::QAR1(A)
      • R(c);OGATE,XS(D)::B(C),XR(c)
      • R(c);N_GUARD::QAR1(A),XR(c)
      • R(c);SBLOCK::QAR(A)
      • R(c);N_GUARD::QAR1(A)
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