MESON Chess Problem Database

Problem Display
PID: 160615 (8/4N1pp/2B5/3K3k/8/6Q1/8/8 w - - 0 1)

Lincoln, Robert A

British Chess Magazine, 2014

8/4N1pp/2B5/3K3k/8/6Q1/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kh6
      • 2.Qh4#
    • 1...g5
      • 2.Qh3#
  • Tries
    • 1.Kc4?
      • 1...Kh6
        • 2.Qh4#
      • 1...g5
        • 2.Qh3#
      • 1...h6
        • 2.Bf3#
      • 1...g6!
    • 1.Kd4?
      • 1...Kh6
        • 2.Qh4#
      • 1...g5
        • 2.Qh3#
      • 1...h6
        • 2.Bf3#
      • 1...g6!
    • 1.Kc5?
      • 1...Kh6
        • 2.Qh4#
      • 1...g5
        • 2.Qh3#
      • 1...h6
        • 2.Bf3#
      • 1...g6!
    • 1.Ke5?
      • 1...Kh6
        • 2.Qh4#
      • 1...g5
        • 2.Qh3#
      • 1...h6
        • 2.Bf3#
      • 1...g6!
    • 1.Kd6?
      • 1...Kh6
        • 2.Qh4#
      • 1...g5
        • 2.Qh3#
      • 1...h6
        • 2.Bf3#
      • 1...g6!
    • 1.Ke6?
      • 1...Kh6
        • 2.Qh4#
      • 1...g5
        • 2.Qh3#
      • 1...h6
        • 2.Bf3#
      • 1...g6!
    • 1.Ba4?
      • 1...Kh6
        • 2.Qh4#
      • 1...g5
        • 2.Qh3#
      • 1...h6
        • 2.Bd1#
      • 1...g6!
    • 1.Bb5?
      • 1...Kh6
        • 2.Qh4#
      • 1...g5
        • 2.Qh3#
      • 1...h6
        • 2.Be2#
      • 1...g6!
    • 1.Bd7?
      • 1...Kh6
        • 2.Qh4#
      • 1...g5
        • 2.Qh2#
        • 2.Qh3#
      • 1...h6
        • 2.Qg4#
      • 1...g6!
    • 1.Be8+?
      • 1...Kh6
        • 2.Sf5#
        • 2.Sg8#
        • 2.Qh4#
      • 1...g6!
    • 1.Qg4+?
      • 1...Kh6
        • 2.Sf5#
        • 2.Sg8#
        • 2.Qh4#
      • 1...Kxg4!
  • Keys
    • 1.Sf5!
      • 1...g5
        • 2.Be8#
      • 1...g6
        • 2.Qh4#
      • 1...h6
        • 2.Sxg7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(a);P-FLIGHT::QAR2(A)
    • P(b);SBLOCK::QAR2(A)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • P(b);SBLOCK::QAR2(A)
        • P(c);SBLOCK::B(C)
      • Refutation
        • P(b);
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • P(b);SBLOCK::QAR2(A)
        • P(c);SBLOCK::B(C)
      • Refutation
        • P(b);
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • P(b);SBLOCK::QAR2(A)
        • P(c);SBLOCK::B(C)
      • Refutation
        • P(b);
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • P(b);SBLOCK::QAR2(A)
        • P(c);SBLOCK::B(C)
      • Refutation
        • P(b);
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • P(b);SBLOCK::QAR2(A)
        • P(c);SBLOCK::B(C)
      • Refutation
        • P(b);
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • P(b);SBLOCK::QAR2(A)
        • P(c);SBLOCK::B(C)
      • Refutation
        • P(b);
    • Try
      • B(C);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • P(b);SBLOCK::QAR2(A)
        • P(c);SBLOCK::B(C)
      • Refutation
        • P(b);
    • Try
      • B(C);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • P(b);SBLOCK::QAR2(A)
        • P(c);SBLOCK::B(C)
      • Refutation
        • P(b);
    • Try
      • B(C);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • P(c);SBLOCK::QAB1(A)
      • Refutation
        • P(b);
    • Try
      • B(C);CHECK
      • Refutation
        • P(b);P_SPINP(b)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
  • Actual
    • S(D);
    • Vars
      • P(b);N_GUARD::B(C)
      • P(b);SBLOCK::QAR1(A)
      • P(c);SBLOCK::S(D),XP(b)
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