MESON Chess Problem Database

Problem Display
PID: 159965 (8/8/6B1/3N2p1/7n/5k2/Q6K/8 w - - 0 1)

Lincoln, Robert A

British Chess Magazine, 2016

8/8/6B1/3N2p1/7n/5k2/Q6K/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Sg2
      • 2.Qxg2#
    • 1...Sf5
      • 2.Qg2#
    • 1...Sxg6
      • 2.Qg2#
  • Tries
    • 1.Kh3?
      • 1...Sxg6
        • 2.Qg2#
      • 1...Sf5
        • 2.Qg2#
      • 1...Sg2
        • 2.Qxg2#
      • 1...g4+!
    • 1.Bf5?
      • 1...Sxf5
        • 2.Qg2#
      • 1...Sg2
        • 2.Qxg2#
      • 1...Sg6
        • 2.Qg2#
      • 1...g4!
    • 1.Qd2?
      • 1...Sxg6
        • 2.Qg2#
      • 1...Sf5
        • 2.Qg2#
      • 1...g4
        • 2.Qe3#
      • 1...Sg2
        • 2.Qxg2#
      • 1...Kg4!
    • 1.Qf2+?
      • 1...Kg4
        • 2.Se3#
        • 2.Sf6#
        • 2.Qg3#
      • 1...Kxf2!
  • Keys
    • 1.Qc2!
      • 1...Kg4
        • 2.Qe4#
      • 1...Sxg6
        • 2.Qg2#
      • 1...g4
        • 2.Be4#
      • 1...Sg2
        • 2.Qxg2#
      • 1...Sf5
        • 2.Qg2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD::QAB1(A),XS(b)
    • S(b);N_GUARD::QAB1(A)
    • S(b);N_GUARD,XB(D)::QAB1(A)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • S(b);N_GUARD,XB(D)::QAB1(A)
        • S(b);N_GUARD::QAB1(A)
        • S(b);N_GUARD::QAB1(A),XS(b)
      • Refutation
        • P(c);CHECK
    • Try
      • B(D);
      • Vars
        • S(b);N_GUARD,XB(D)::QAB1(A)
        • S(b);N_GUARD::QAB1(A),XS(b)
        • S(b);N_GUARD::QAB1(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Vars
        • S(b);N_GUARD,XB(D)::QAB1(A)
        • S(b);N_GUARD::QAB1(A)
        • P(c);SBLOCK::QAR1(A)
        • S(b);N_GUARD::QAB1(A),XS(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);P-FLIGHT,XQ(A)
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::QAR2(A)
      • S(b);N_GUARD,XB(D)::QAB1(A)
      • P(c);SBLOCK::B(D)
      • S(b);N_GUARD::QAB1(A),XS(b)
      • S(b);N_GUARD::QAB1(A)
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