MESON Chess Problem Database

Problem Display
PID: 141940 (5K2/3pN3/n2k4/1p3P2/1P6/5pp1/2Q3Pb/6B1 w - - 0 1)

Thomson, Robert Gavin

British Chess Magazine 06. Ty., 1890

5K2/3pN3/n2k4/1p3P2/1P6/5pp1/2Q3Pb/6B1

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sxb4
      • 2.Qc5#
    • 1...Sc5
      • 2.Qxc5#
    • 1...Sc7
      • 2.Qc5#
    • 1...Sb8
      • 2.Qc5#
  • Tries
    • 1.Qd1+?
      • 1...Ke5
        • 2.Qd4#
      • 1...Kc7!
    • 1.Qd3+?
      • 1...Ke5
        • 2.Qd4#
      • 1...Kc7!
    • 1.Qd2+?
      • 1...Ke5
        • 2.Qd4#
      • 1...Kc7!
    • 1.Qc4?
      • threat
        • 2.Qf4#
      • 1...Ke5
        • 2.Qd4#
      • 1...bxc4!
  • Keys
    • 1.Qf2!
      • 1...Ke5
        • 2.Qd4#
      • 1...Kc7
        • 2.Qb6#
      • 1...Bxg1
        • 2.Qxg3#
      • 1...Sxb4
        • 2.Qc5#
      • 1...fxg2
        • 2.Qf4#
      • 1...gxf2
        • 2.Bxh2#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sc7
        • 2.Qc5#
      • 1...Sb8
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(e);N_GUARD,XP(D)::QAB1(B)
    • S(e);N_GUARD::QAB1(B),XS(e)
    • S(e);N_GUARD::QAB1(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(f);S_FLIGHT::QAB1(B)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(f);S_FLIGHT::QAB1(B)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(f);S_FLIGHT::QAB1(B)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAB(B)
      • Vars
        • K(f);S_FLIGHT::QAB1(B)
      • Refutation
        • P(d);XQ(B)
  • Actual
    • Q(B);
    • Vars
      • K(f);S_FLIGHT::QAB1(B)
      • B(a);N_GUARD,XB(A)::QAB(B),XP(c)
      • S(e);N_GUARD,XP(D)::QAB1(B)
      • P(b);OGATE,XP(C)::QAB(B)
      • P(c);OGATEB,XQ(B)::B(A),XB(a)
      • S(e);N_GUARD::QAB1(B),XS(e)
      • S(e);N_GUARD::QAB1(B)
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