MESON Chess Problem Database

Problem Display
PID: 240302 (2R5/8/1Q6/6b1/8/8/3P4/n2k1K2 w - - 0 1)

Lincoln, Robert A

Problem-Forum, 2016

2R5/8/1Q6/6b1/8/8/3P4/n2k1K2

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd2
      • 2.Qd4#
  • Tries
    • 1.Qf2?
      • threat
        • 2.Qe1#
        • 2.Qe2#
      • 1...Bxd2
        • 2.Qe2#
        • 2.Qf3#
      • 1...Bh4
        • 2.Qe2#
      • 1...Sc2!
    • 1.Qb2?
      • threat
        • 2.Rc1#
        • 2.Qc1#
      • 1...Sc2
        • 2.Qxc2#
      • 1...Sb3
        • 2.Qc2#
      • 1...Bxd2!
    • 1.Qb5?
      • threat
        • 2.Qe2#
      • 1...Kxd2
        • 2.Qe2#
      • 1...Sc2!
    • 1.Qa6?
      • threat
        • 2.Qe2#
      • 1...Kxd2
        • 2.Qe2#
      • 1...Sc2!
    • 1.Qc6?
      • threat
        • 2.Qc1#
      • 1...Bxd2
        • 2.Qf3#
      • 1...Sc2
        • 2.Qxc2#
      • 1...Sb3
        • 2.Qc2#
      • 1...Kxd2!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qc1#
      • 1...Kxd2
        • 2.Qd4#
      • 1...Bxd2
        • 2.Qh5#
      • 1...Sc2
        • 2.Qxc2#
      • 1...Sb3
        • 2.Qc2#

FEATURES

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