MESON Chess Problem Database

Problem Display
PID: 23799 (8/7r/8/8/B4Q2/7k/7P/5n1K w - - 0 1)

Lincoln, Robert A

Smena, 1996

8/7r/8/8/B4Q2/7k/7P/5n1K

#2

4 + 3

2786 More Fun with Chess Miniatures 2000

SOLUTION

  • SOUND
  • Sets
    • 1...Rd7
      • 2.Bxd7#
    • 1...Rh8
      • 2.Bd7#
    • 1...Sd2
      • 2.Qg3#
    • 1...Se3
      • 2.Qg3#
    • 1...Sg3+
      • 2.Qxg3#
  • Tries
    • 1.Bc6?
      • threat
        • 2.Bg2#
      • 1...Sg3+
        • 2.Qxg3#
      • 1...Se3
        • 2.Qg3#
      • 1...Rg7!
    • 1.Qf3+?
      • 1...Sg3+
        • 2.Qxg3#
      • 1...Kh4!
  • Keys
    • 1.Bd1!
      • threat
        • 2.Qg4#
      • 1...Sg3+
        • 2.Qxg3#
      • 1...Sxh2
        • 2.Qxh2#
      • 1...Rh4
        • 2.Qxf1#
      • 1...Rg7
        • 2.Qh6#
      • 1...Se3
        • 2.Qg3#

FEATURES

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