MESON Chess Problem Database

Problem Display
PID: 38804 (5B2/7Q/8/2pk4/5K2/4R3/3n4/8 w - - 0 1)

Lincoln, Robert A

Australian Chess Problem Magazine, 1997

5B2/7Q/8/2pk4/5K2/4R3/3n4/8

#2

4 + 3

2786 More Fun with Chess Miniatures 2000
5454 Near Snap 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qd3#
    • 1...Sb1
      • 2.Qe4#
    • 1...Sf1
      • 2.Qe4#
    • 1...Sb3
      • 2.Qe4#
    • 1...Sf3
      • 2.Qe4#
    • 1...Sc4
      • 2.Qe4#
    • 1...Se4
      • 2.Qxe4#
    • 1...c4
      • 2.Qd7#
  • Tries
    • 1.Rc3?
      • threat
        • 2.Qd7#
      • 1...Kd4
        • 2.Qd3#
      • 1...Ke6
        • 2.Qf5#
      • 1...Sc4
        • 2.Qe4#
      • 1...Se4
        • 2.Qxe4#
      • 1...Kc6!
    • 1.Re4?
      • threat
        • 2.Qb7#
        • 2.Qd7#
      • 1...Sxe4
        • 2.Qxe4#
      • 1...Sc4
        • 2.Qb7#
      • 1...Kc6!
    • 1.Qf5+?
      • 1...Kc4
        • 2.Qxc5#
      • 1...Kd4
        • 2.Qd3#
        • 2.Qxc5#
      • 1...Kc6!
    • 1.Qg6?
      • 1...Kd4
        • 2.Qd3#
      • 1...Sb1
        • 2.Qe4#
      • 1...Sf1
        • 2.Qe4#
      • 1...Sb3
        • 2.Qe4#
      • 1...Sf3
        • 2.Qe4#
      • 1...Sc4
        • 2.Rd3#
        • 2.Qe4#
      • 1...Se4
        • 2.Qxe4#
      • 1...c4
        • 2.Qd6#
      • 1...Kc4!
    • 1.Qg8+?
      • 1...Kd4
        • 2.Bg7#
      • 1...Kc6!
    • 1.Qh5+?
      • 1...Kc4
        • 2.Qxc5#
      • 1...Kd4
        • 2.Qxc5#
      • 1...Kc6!
    • 1.Qe7?
      • threat
        • 2.Qxc5#
      • 1...Kc4
        • 2.Qxc5#
      • 1...Kd4
        • 2.Qxc5#
      • 1...Sb3
        • 2.Qe4#
      • 1...Se4
        • 2.Qxe4#
      • 1...c4
        • 2.Qc5#
        • 2.Qd6#
        • 2.Qd7#
      • 1...Kc6!
    • 1.Qf7+?
      • 1...Kd4
        • 2.Bg7#
      • 1...Kc6!
  • Keys
    • 1.Rb3!
      • 1...Kc4
        • 2.Qd3#
      • 1...Kd4
        • 2.Qd3#
      • 1...Kc6
        • 2.Qb7#
      • 1...Ke6
        • 2.Qf5#
      • 1...Sxb3
        • 2.Qe4#
      • 1...Sb1
        • 2.Qe4#
      • 1...Sf1
        • 2.Qe4#
      • 1...Sf3
        • 2.Qe4#
      • 1...Sc4
        • 2.Qe4#
      • 1...Se4
        • 2.Qxe4#
      • 1...c4
        • 2.Qd7#

Anticipated by 51015(1888)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT::QAR1(C)
    • S(a);N_GUARD::QAB1(C)
    • S(a);N_GUARD::QAB1(C),XS(a)
    • P(b);SBLOCK::QAR2(C)
  • Tries
    • Try
      • R(A);
      • Threat
        • QAR2(C)
      • Vars
        • K(c);P-FLIGHT::QAR1(C)
        • K(c);S_FLIGHT::QAB1(C)
        • S(a);N_GUARD::QAB1(C)
        • S(a);N_GUARD::QAB1(C),XS(a)
      • Refutation
        • K(c);P_SPINP(b),S_FLIGHT
    • Try
      • R(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);OGATE,XR(A)::QAB1(C),XS(a)
        • S(a);::QAB(C)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAR1(C),XP(b)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(c);P-FLIGHT::QAR1(C)
        • S(a);N_GUARD::QAB1(C)
        • S(a);N_GUARD::QAB1(C),XS(a)
        • P(b);SBLOCK::QAR1(C)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);P-FLIGHT::B(D)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAR1(C),XP(b)
        • K(c);OGATE,P-FLIGHT::QAB1(C),XP(b)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAR1(C),XP(b)
      • Vars
        • K(c);S_FLIGHT::QAR1(C),XP(b)
        • K(c);P-FLIGHT::QAB1(C),XP(b)
        • S(a);N_GUARD::QAB1(C)
        • S(a);N_GUARD::QAB1(C),XS(a)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);P-FLIGHT::B(D)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • R(A);
    • Vars
      • K(c);S_FLIGHT::QAB1(C)
      • K(c);P-FLIGHT::QAR1(C)
      • S(a);N_GUARD,XR(A)::QAB1(C)
      • S(a);N_GUARD::QAB1(C)
      • S(a);N_GUARD::QAB1(C),XS(a)
      • P(b);SBLOCK::QAR2(C)
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