MESON Chess Problem Database

Problem Display
PID: 16179 (4R3/pk6/8/2QP4/K2n4/8/8/8 w - - 0 1)

Lincoln, Robert A

StrateGems, 2000

4R3/pk6/8/2QP4/K2n4/8/8/8

#2

4 + 3

4883 Still More Fun with Chess Miniatures 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Qc6#
    • 1...Se2
      • 2.Qc6#
    • 1...Sb3
      • 2.Qc6#
    • 1...Sf3
      • 2.Qc6#
    • 1...Sb5
      • 2.Qc6#
    • 1...Sf5
      • 2.Qc6#
    • 1...Sc6
      • 2.Qxc6#
    • 1...Se6
      • 2.Qc6#
  • Tries
    • 1.Ka5?
      • threat
        • 2.Qe7#
        • 2.Qc8#
      • 1...Sc6+
        • 2.Qxc6#
      • 1...Sb5
        • 2.Qc6#
        • 2.Qc8#
      • 1...Sf5
        • 2.Qc6#
        • 2.Qc8#
      • 1...Se6
        • 2.Qc6#
        • 2.Qc8#
      • 1...a6
        • 2.Qb6#
        • 2.Qe7#
      • 1...Sb3+!
    • 1.Re7+?
      • 1...Ka6
        • 2.Rxa7#
        • 2.Qxa7#
        • 2.Qa5#
      • 1...Ka8
        • 2.Qxa7#
        • 2.Qc8#
      • 1...Kb8!
    • 1.Rb8+?
      • 1...Ka6
        • 2.Qa5#
        • 2.Qc8#
      • 1...Kxb8!
    • 1.Qd6?
      • threat
        • 2.Rb8#
      • 1...Sc6
        • 2.Qxc6#
      • 1...a6
        • 2.Qb8#
      • 1...a5!
  • Keys
    • 1.Ra8!
      • threat
        • 2.Qxa7#
      • 1...Ka6
        • 2.Rxa7#
        • 2.Qxa7#
      • 1...Kxa8
        • 2.Qc8#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sb5
        • 2.Qc6#
      • 1...a5
        • 2.Qa7#
      • 1...a6
        • 2.Qa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • S(a);N_GUARD::QAB1(B)
    • S(a);N_GUARD::QAB1(B),XS(a)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • S(a);CHECK,N_GUARD::QAB1(B),XS(a)
      • Refutation
        • S(a);CHECK
    • Try
      • R(D);CHECK
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • R(D);CHECK
      • Refutation
        • K(c);P-FLIGHT,XR(D)
    • Try
      • Q(B);
      • Threat
        • R1(D)
      • Vars
        • S(a);N_GUARD::QAB1(B),XS(a)
        • P(b);SBLOCK::QAR1(B)
      • Refutation
        • P(b);
  • Actual
    • R(D);
    • Threat
      • QAR1(B),XP(b)
    • Vars
      • K(c);S_FLIGHT,XR(D)::QAR2(B)
      • S(a);N_GUARD::QAB1(B),XS(a)
      • S(a);N_GUARD::QAB1(B)
      • P(b);::QAR1(B)
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