MESON Chess Problem Database

Problem Display
PID: 48103 (8/6r1/8/8/3QNB2/8/8/4bK1k w - - 0 1)

Lincoln, Robert A

Still More Fun with Chess Miniatures, 2002

8/6r1/8/8/3QNB2/8/8/4bK1k

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Rg1+
      • 2.Qxg1#
    • 1...Ra7
      • 2.Qg1#
    • 1...Rb7
      • 2.Qg1#
    • 1...Rc7
      • 2.Qg1#
    • 1...Rd7
      • 2.Qg1#
    • 1...Re7
      • 2.Qg1#
    • 1...Rf7
      • 2.Qg1#
    • 1...Rh7
      • 2.Qg1#
    • 1...Bd2
      • 2.Sf2#
    • 1...Bf2
      • 2.Sxf2#
    • 1...Bc3
      • 2.Sf2#
    • 1...Bg3
      • 2.Qg1#
    • 1...Bb4
      • 2.Sf2#
    • 1...Ba5
      • 2.Sf2#
  • Tries
    • 1.Sg5?
      • threat
        • 2.Qg1#
        • 2.Qe4#
        • 2.Qd5#
      • 1...Bg3
        • 2.Qg1#
      • 1...Rd7
        • 2.Qg1#
        • 2.Qe4#
      • 1...Re7
        • 2.Qg1#
      • 1...Bf2
        • 2.Qe4#
        • 2.Qd5#
      • 1...Rxg5!
    • 1.Qxg7?
      • threat
        • 2.Qg1#
        • 2.Qg2#
      • 1...Bf2
        • 2.Sxf2#
        • 2.Qg2#
      • 1...Bg3!
  • Keys
    • 1.Qf2!
      • threat
        • 2.Qh2#
      • 1...Rg1+
        • 2.Qxg1#
      • 1...Bxf2
        • 2.Sxf2#
      • 1...Rg2
        • 2.Qxg2#
      • 1...Rg3
        • 2.Sxg3#
      • 1...Rh7
        • 2.Sg3#
        • 2.Qg1#
        • 2.Qg2#
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 12
  • Sets
    • R(c);CHECK,N_GUARD::QAR1(B),XR(c)
    • R(c);N_GUARD::QAR1(B)
    • R(c);N_GUARD,P_PINB(D)::QAR1(B)
    • B(a);N_GUARD::S(C)
    • B(a);N_GUARD::S(C),XB(a)
    • B(a);S_CUTR(c)::QAR1(B)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(3)
      • Vars
        • B(a);::QAR1(B)
        • R(c);::QAR1(B)
      • Refutation
        • R(c);XS(C)
    • Try
      • Q(B);XR(c)
      • Threat
        • DUALS(2)
      • Refutation
        • B(a);
  • Actual
    • Q(B);
    • Threat
      • QAR1(B)
    • Vars
      • R(c);CHECK,N_GUARD::QAR1(B),XR(c)
      • B(a);XQ(B)::S(C),XB(a)
      • R(c);N_GUARD::QAB1(B),XR(c)
      • R(c);N_GUARD::S(C),XR(c)
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