MESON Chess Problem Database

Problem Display
PID: 15848 (rb6/8/k1K5/p7/n2Q4/8/8/8 w - - 0 1)

Lincoln, Robert A

Newark Star-Ledger, 1988

rb6/8/k1K5/p7/n2Q4/8/8/8

#2

2 + 5

2838 Fun with Chess Miniatures 1996
5454 Near Snap 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ra7
      • 2.Qd3#
      • 2.Qc4#
    • 1...Ba7
      • 2.Qd3#
      • 2.Qc4#
    • 1...Sb2
      • 2.Qb6#
    • 1...Sc3
      • 2.Qb6#
    • 1...Sb6
      • 2.Qxb6#
  • Tries
    • 1.Qb2?
      • threat
        • 2.Qb7#
      • 1...Ka7
        • 2.Qb7#
      • 1...Ra7
        • 2.Qe2#
        • 2.Qb5#
      • 1...Sc5
        • 2.Qb6#
      • 1...Sb6
        • 2.Qxb6#
      • 1...Sxb2!
    • 1.Qb4?
      • threat
        • 2.Qb7#
      • 1...Ka7
        • 2.Qxa5#
        • 2.Qb7#
      • 1...Ra7
        • 2.Qc4#
        • 2.Qb5#
      • 1...Sc5
        • 2.Qb6#
      • 1...Sb6
        • 2.Qxb6#
      • 1...axb4!
  • Keys
    • 1.Qd8!
      • 1...Ka7
        • 2.Qxa5#
      • 1...Bh2
        • 2.Qxa8#
      • 1...Ra7
        • 2.Qd3#
      • 1...Bg3
        • 2.Qxa8#
      • 1...Bf4
        • 2.Qxa8#
      • 1...Be5
        • 2.Qxa8#
      • 1...Bd6
        • 2.Qxa8#
      • 1...Ba7
        • 2.Qd3#
      • 1...Bc7
        • 2.Qxa8#
      • 1...Sb2
        • 2.Qb6#
      • 1...Sc3
        • 2.Qb6#
      • 1...Sc5
        • 2.Qb6#
      • 1...Sb6
        • 2.Qxb6#

This anticipates 221082(1998), 139545(2010)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAR1(A)
    • S(a);N_GUARD::QAR1(A),XS(a)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(c);P-FLIGHT::QAR1(A)
        • S(a);N_GUARD::QAR1(A)
        • S(a);N_GUARD::QAR1(A),XS(a)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • S(a);N_GUARD::QAR1(A)
        • S(a);N_GUARD::QAR1(A),XS(a)
      • Refutation
        • P(b);XQ(A)
  • Actual
    • Q(A);
    • Vars
      • K(c);P-FLIGHT::QAR2(A),XP(b)
      • B(e);OGATE::QAR2(A),XR(d)
      • R(d);SBLOCK::QAB(A)
      • B(e);SBLOCK::QAB(A)
      • S(a);N_GUARD::QAR1(A)
      • S(a);N_GUARD::QAR1(A),XS(a)
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