MESON Chess Problem Database

Problem Display
PID: 23162 (1b6/1R6/2p5/k7/8/p7/8/5Q1K w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

1b6/1R6/2p5/k7/8/p7/8/5Q1K

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Ka4
      • 2.Qa6#
    • 1...c5
      • 2.Qb5#
  • Tries
    • 1.Rb6?
      • threat
        • 2.Qa6#
      • 1...Ka4
        • 2.Qa6#
      • 1...Kxb6!
    • 1.Rxb8?
      • 1...Ka4
        • 2.Qa6#
      • 1...c5
        • 2.Qb5#
      • 1...a2!
    • 1.Qd3?
      • threat
        • 2.Qxa3#
      • 1...Ka4
        • 2.Qa6#
      • 1...a2
        • 2.Qa3#
      • 1...Bd6!
    • 1.Qe1+?
      • 1...Ka4
        • 2.Qb4#
      • 1...Ka6!
  • Keys
    • 1.Qb1!
      • 1...Ka4
        • 2.Qb4#
      • 1...Ka6
        • 2.Qb6#
      • 1...Bh2
        • 2.Ra7#
      • 1...Bg3
        • 2.Ra7#
      • 1...Bf4
        • 2.Ra7#
      • 1...Be5
        • 2.Ra7#
      • 1...Bd6
        • 2.Ra7#
      • 1...Ba7
        • 2.Rxa7#
      • 1...Bc7
        • 2.Ra7#
      • 1...a2
        • 2.Qxa2#
      • 1...c5
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR2(A)
    • P(c);N_GUARD::QAR1(A)
  • Tries
    • Try
      • R(C);
      • Threat
        • QAR1(A)
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
      • Refutation
        • K(b);S_FLIGHT,XR(C)
    • Try
      • R(C);XB(d)
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
        • P(c);N_GUARD::QAR1(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Threat
        • QAR2(A),XP(a)
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
        • P(a);::QAR2(A)
      • Refutation
        • B(d);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);P-FLIGHT::QAR1(A)
      • B(d);N_GUARD::R(C)
      • B(d);N_GUARD::R(C),XB(d)
      • P(a);OGATEB::QAR(A),XP(a)
      • P(c);N_GUARD::QAR1(A)
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