MESON Chess Problem Database

Problem Display
PID: 23879 (8/8/8/5Q2/8/8/p5R1/K3k2n w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

8/8/8/5Q2/8/8/p5R1/K3k2n

#2

3 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kd1
      • 2.Qf1#
  • Tries
    • 1.Kxa2?
      • threat
        • 2.Qb1#
      • 1...Kd1
        • 2.Qb1#
        • 2.Qf1#
      • 1...Sf2!
    • 1.Rxa2?
      • threat
        • 2.Qb1#
      • 1...Kd1
        • 2.Qb1#
        • 2.Qf1#
      • 1...Sf2!
    • 1.Rd2?
      • 1...Sf2
        • 2.Qxf2#
      • 1...Sg3
        • 2.Qf2#
      • 1...Kxd2!
    • 1.Re2+?
      • 1...Kd1
        • 2.Qc2#
        • 2.Qf1#
      • 1...Kxe2!
    • 1.Qd3?
      • threat
        • 2.Qe2#
      • 1...Sf2
        • 2.Rg1#
      • 1...Sg3!
    • 1.Qe4+?
      • 1...Kf1
        • 2.Qe2#
      • 1...Kd1!
    • 1.Qe6+?
      • 1...Kf1
        • 2.Qe2#
      • 1...Kd1!
    • 1.Qf2+?
      • 1...Kd1
        • 2.Rg1#
        • 2.Qg1#
        • 2.Qf1#
        • 2.Qd2#
      • 1...Sxf2!
    • 1.Qf4?
      • threat
        • 2.Qc1#
      • 1...Kd1
        • 2.Qd2#
        • 2.Qf1#
      • 1...Sf2!
    • 1.Qa5+?
      • 1...Kd1
        • 2.Qd2#
      • 1...Kf1!
    • 1.Qc5?
      • threat
        • 2.Qg1#
        • 2.Qc1#
      • 1...Kd1
        • 2.Qg1#
      • 1...Kf1
        • 2.Qg1#
      • 1...Sg3
        • 2.Qc1#
      • 1...Sf2!
    • 1.Qe5+?
      • 1...Kf1
        • 2.Qe2#
      • 1...Kd1!
  • Keys
    • 1.Qc2!
      • threat
        • 2.Rg1#
        • 2.Qc1#
        • 2.Qe2#
      • 1...Kf1
        • 2.Qe2#
      • 1...Sg3
        • 2.Qc1#
      • 1...Sf2
        • 2.Rg1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(a);P-FLIGHT::QAR2(C)
  • Tries
    • Try
      • K(A);P-FLIGHT,XP(c)
      • Threat
        • QAR(C)
      • Refutation
        • S(b);
    • Try
      • R(B);XP(c)
      • Threat
        • QAR(C)
      • Refutation
        • S(b);
    • Try
      • R(B);
      • Vars
        • S(b);N_GUARD::QAB1(C),XS(b)
        • S(b);N_GUARD::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
    • Try
      • R(B);CHECK
      • Refutation
        • K(a);P-FLIGHT,XR(B)
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • S(b);SBLOCK::R(B)
      • Refutation
        • S(b);
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Refutation
        • S(b);XQ(C)
    • Try
      • Q(C);
      • Threat
        • QAR2(C)
      • Refutation
        • S(b);
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR(C)
        • K(a);P-FLIGHT::QAR1(C)
        • S(b);::QAR2(C)
      • Refutation
        • S(b);
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(C);
    • Threat
      • DUALS(3)
    • Vars
      • K(a);P-FLIGHT::QAB1(C)
      • S(b);::QAR2(C)
      • S(b);::R(B)
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