MESON Chess Problem Database

Problem Display
PID: 156352 (3Q4/3p4/8/8/3n2p1/3K4/3B4/3k4 w - - 0 1)

Lincoln, Robert A

The Problemist, 2014

3Q4/3p4/8/8/3n2p1/3K4/3B4/3k4

#2

3 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Qh4?
      • threat
        • 2.Qe1#
        • 2.Qh1#
      • 1...Sc2
        • 2.Qxg4#
      • 1...Se2
        • 2.Qe1#
      • 1...g3
        • 2.Qh1#
      • 1...Sf3!
    • 1.Qf6?
      • threat
        • 2.Qf1#
      • 1...Sf3
        • 2.Qa1#
      • 1...Sf5
        • 2.Qa1#
      • 1...Sc2!
    • 1.Qc7?
      • threat
        • 2.Qc1#
      • 1...Sc2
        • 2.Qxc2#
      • 1...Se2
        • 2.Qc2#
      • 1...Sb3
        • 2.Qc2#
      • 1...Sc6!
    • 1.Qe7?
      • threat
        • 2.Qe1#
      • 1...Sc2
        • 2.Qe2#
      • 1...Se2
        • 2.Qxe2#
      • 1...Sf3
        • 2.Qe2#
      • 1...Se6!
    • 1.Qxd7?
      • 1...Sc2
        • 2.Qxg4#
      • 1...Se2
        • 2.Qa4#
      • 1...Sb3
        • 2.Qxg4#
      • 1...Sf3
        • 2.Qa4#
      • 1...Sb5
        • 2.Qxg4#
      • 1...Sf5
        • 2.Qa4#
      • 1...Sc6
        • 2.Qxg4#
      • 1...Se6
        • 2.Qa4#
      • 1...g3!
    • 1.Qa8?
      • threat
        • 2.Qh1#
        • 2.Qa1#
      • 1...Se2
        • 2.Qa4#
      • 1...Sb3
        • 2.Qh1#
      • 1...Sf3
        • 2.Qa1#
        • 2.Qa4#
      • 1...Sc6
        • 2.Qa1#
        • 2.Qa4#
      • 1...d5
        • 2.Qa1#
      • 1...Sc2!
    • 1.Qb8?
      • threat
        • 2.Qb1#
      • 1...Se2
        • 2.Qb3#
      • 1...Sb3
        • 2.Qxb3#
      • 1...Sb5!
    • 1.Qc8?
      • threat
        • 2.Qc1#
      • 1...Sc2
        • 2.Qxc2#
      • 1...Se2
        • 2.Qc2#
      • 1...Sb3
        • 2.Qc2#
      • 1...Sc6!
    • 1.Qe8?
      • threat
        • 2.Qe1#
      • 1...Sc2
        • 2.Qe2#
      • 1...Se2
        • 2.Qxe2#
      • 1...Sf3
        • 2.Qe2#
      • 1...Se6!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Qb1#
      • 1...Se2
        • 2.Qb3#
      • 1...Sb3
        • 2.Qg1#
        • 2.Qxb3#
      • 1...Sb5
        • 2.Qg1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);N_GUARD::QAB(C),XP(c)
        • S(b);::QAR1(C)
        • P(c);::QAR(C)
      • Refutation
        • S(b);
    • Try
      • Q(C);
      • Threat
        • QAR2(C)
      • Vars
        • S(b);OGATE::QAR(C)
      • Refutation
        • S(b);
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • S(b);N_GUARD::QAB1(C),XS(b)
        • S(b);N_GUARD::QAB1(C)
      • Refutation
        • S(b);
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • S(b);N_GUARD::QAB1(C)
        • S(b);N_GUARD::QAB1(C),XS(b)
      • Refutation
        • S(b);
    • Try
      • Q(C);XP(d)
      • Vars
        • S(b);N_GUARD::QAB(C),XP(c)
        • S(b);N_GUARD::QAB(C)
      • Refutation
        • P(c);
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);N_GUARD::QAB(C)
        • S(b);::QAR(C)
        • P(d);::QAR(C)
      • Refutation
        • S(b);
    • Try
      • Q(C);
      • Threat
        • QAR2(C)
      • Vars
        • S(b);N_GUARD::QAB(C)
        • S(b);N_GUARD::QAB(C),XS(b)
      • Refutation
        • S(b);
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • S(b);N_GUARD::QAB1(C),XS(b)
        • S(b);N_GUARD::QAB1(C)
      • Refutation
        • S(b);
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • S(b);N_GUARD::QAB1(C)
        • S(b);N_GUARD::QAB1(C),XS(b)
      • Refutation
        • S(b);
  • Actual
    • Q(C);
    • Threat
      • QAR2(C)
    • Vars
      • S(b);N_GUARD::QAB(C)
      • S(b);OGATE::QAR(C)
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