MESON Chess Problem Database

Problem Display
PID: 7510 (8/8/2R1R3/3k4/4p3/3n4/8/3Q1K2 w - - 0 1)

Lincoln, Robert A

The Problemist, 1990

8/8/2R1R3/3k4/4p3/3n4/8/3Q1K2

#2

4 + 3

2838 Fun with Chess Miniatures 1996

SOLUTION

  • SOUND
  • Sets
    • 1...e3
      • 2.Qxd3#
  • Tries
    • 1.Kg1?
      • 1...e3
        • 2.Qxd3#
      • 1...Kd4!
    • 1.Ke2?
      • 1...e3
        • 2.Qxd3#
      • 1...Kd4!
    • 1.Kg2?
      • 1...e3
        • 2.Qxd3#
      • 1...Kd4!
    • 1.Qc2?
      • threat
        • 2.Rcd6#
        • 2.Qc4#
      • 1...Sb2
        • 2.Rcd6#
        • 2.Qxe4#
        • 2.Qc5#
      • 1...Sc5
        • 2.Rcd6#
        • 2.Qxc5#
      • 1...Se5
        • 2.Rcd6#
        • 2.Red6#
        • 2.Qc5#
      • 1...Kd4!
    • 1.Qa4?
      • threat
        • 2.Qc4#
        • 2.Qxe4#
      • 1...Sb2
        • 2.Qxe4#
      • 1...Sf2
        • 2.Qc4#
      • 1...Sc5
        • 2.Rcd6#
      • 1...Se5
        • 2.Red6#
      • 1...e3
        • 2.Qc4#
        • 2.Qe4#
      • 1...Sb4!
    • 1.Qh5+?
      • 1...Se5
        • 2.Red6#
        • 2.Qxe5#
      • 1...Kd4!
    • 1.Qc1?
      • threat
        • 2.Rcd6#
        • 2.Qc4#
      • 1...Kd4
        • 2.Rcd6#
      • 1...Sb2
        • 2.Rcd6#
        • 2.Qc5#
      • 1...Sc5
        • 2.Rcd6#
        • 2.Qxc5#
      • 1...Se5
        • 2.Rcd6#
        • 2.Red6#
        • 2.Qc5#
      • 1...Sxc1!
    • 1.Qd2?
      • 1...e3
        • 2.Qxd3#
      • 1...Kd4!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qxe4#
      • 1...Kd4
        • 2.Qxe4#
      • 1...Sf2
        • 2.Qc4#
      • 1...Sc5
        • 2.Rcd6#
      • 1...Se5
        • 2.Red6#
      • 1...e3
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(b);N_GUARD::QAR2(A),XS(a)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • P(b);N_GUARD::QAR2(A),XS(a)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • K(B);S_FLIGHT
      • Vars
        • P(b);N_GUARD::QAR2(A),XS(a)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • K(B);S_FLIGHT
      • Vars
        • P(b);N_GUARD::QAR2(A),XS(a)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);N_PINS(a)
      • Threat
        • DUALS(2)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);N_PINS(a)
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::QAB1(A),XP(b)
        • S(a);::QAB1(A)
        • S(a);SBLOCK::R1(C)
        • S(a);SBLOCK::R1(D)
      • Refutation
        • S(a);
    • Try
      • Q(A);CHECK,N_PINS(a)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);N_PINS(a)
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P-FLIGHT::R(C)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);
      • Vars
        • P(b);N_GUARD::QAR2(A),XS(a)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • Q(A);N_PINS(a)
    • Threat
      • QAB1(A),XP(b)
    • Vars
      • K(c);P-FLIGHT::QAR1(A),XP(b)
      • S(a);OGATE::QAB1(A)
      • S(a);SBLOCK::R1(C)
      • S(a);SBLOCK::R1(D)
      • P(b);N_GUARD::QAR2(A),XS(a)
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