MESON Chess Problem Database

Problem Display
PID: 48099 (8/3p4/8/1Q6/4k1K1/3rN3/8/5N2 w - - 0 1)

Lincoln, Robert A

Still More Fun with Chess Miniatures, 2002

8/3p4/8/1Q6/4k1K1/3rN3/8/5N2

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Ra3
      • 2.Qd5#
    • 1...Rb3
      • 2.Qd5#
    • 1...Rc3
      • 2.Qd5#
    • 1...Rd4
      • 2.Qf5#
    • 1...Rd5
      • 2.Qxd5#
  • Tries
    • 1.Sf5?
      • 1...Rg3+
        • 2.S1xg3#
      • 1...Rd5
        • 2.Qe2#
      • 1...d5
        • 2.Qe8#
      • 1...Rd1
        • 2.S1g3#
      • 1...Rd2
        • 2.Sxd2#
        • 2.S1g3#
      • 1...Ra3
        • 2.Sd2#
      • 1...Rb3
        • 2.Sd2#
      • 1...Rc3
        • 2.Sd2#
      • 1...Re3
        • 2.Sd2#
      • 1...Rf3
        • 2.Sd2#
      • 1...Rh3
        • 2.Sd2#
      • 1...Rd4
        • 2.S1g3#
        • 2.S5g3#
      • 1...Rd6
        • 2.S1g3#
      • 1...d6!
  • Keys
    • 1.Sc2!
      • threat
        • 2.Qf5#
      • 1...Rg3+
        • 2.Sxg3#
      • 1...Rd5
        • 2.Qe2#
      • 1...d5
        • 2.Qe8#
      • 1...Rf3
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(a);N_GUARD::QAB1(D)
    • R(a);SBLOCK::QAB1(D)
    • R(a);N_GUARD::QAB1(D),XR(a)
  • Tries
    • Try
      • S(B);
      • Vars
        • R(a);CHECK,N_GUARD::S(A),XR(a)
        • R(a);OGATE,SBLOCK::QAR2(D)
        • P(c);OGATE,SBLOCK::QAR(D)
        • R(a);N_GUARD::S(A)
      • Refutation
        • P(c);
  • Actual
    • S(B);
    • Threat
      • QAB1(D)
    • Vars
      • R(a);CHECK,N_GUARD::S(A),XR(a)
      • R(a);OGATE,SBLOCK::QAR2(D)
      • P(c);OGATE,SBLOCK::QAR(D)
      • R(a);N_GUARD::S(A)
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Developed and maintained by Brian Stephenson.
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