MESON Chess Problem Database

Problem Display
PID: 1987 (8/8/8/8/8/8/KBBkpQp1/8 w - - 0 1)

Shinkman, William Anthony

Source?, 1868

8/8/8/8/8/8/KBBkpQp1/8

#2

4 + 3

785 Het Belgisch Schaakbord (L'Echiquier Belge) 1955
3295 Einfuhrung in die Welt des Schachproblem 1984
3310 2345 Chess Problems 1997
3639 Hastings Solving Ty. 2001-2002
5454 Near Snap 2007
133 The Problemist Supplement 2009
136 Problem Observer 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc2
      • 2.Qxe2#
  • Tries
    • 1.Qg3?
      • threat
        • 2.Qc3#
      • 1...e1Q
        • 2.Qd3#
      • 1...e1S
        • 2.Qf2#
      • 1...e1B
        • 2.Qd3#
      • 1...e1R
        • 2.Qd3#
      • 1...Kxc2!
    • 1.Qxg2?
      • 1...Ke1
        • 2.Bc3#
      • 1...Kxc2
        • 2.Qxe2#
      • 1...Ke3!
    • 1.Qf4+?
      • 1...Ke1
        • 2.Bc3#
      • 1...Kxc2!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qc3#
      • 1...Ke1
        • 2.Bc3#
      • 1...Kxc2
        • 2.Qxe2#
      • 1...e1Q
        • 2.Qd3#
      • 1...e1S
        • 2.Qf2#
      • 1...e1B
        • 2.Qd3#
      • 1...e1R
        • 2.Qd3#

This anticipates 231390(1927), 110540(1953), 39043(1987)

There are these versions: 214530

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT,XB(C)::QAR2(D),XP(b)
  • Tries
    • Try
      • Q(D);N_PINP(b)
      • Threat
        • QAB1(D)
      • Vars
        • P(b);SBLOCK::QAR1(D)
        • P(b);OGATEB::QAR2(D)
      • Refutation
        • K(a);P-FLIGHT,XB(C)
    • Try
      • Q(D);XP(c)
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::B(B)
        • K(a);P-FLIGHT,XB(C)::QAR2(D),XP(b)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT
    • Try
      • Q(D);CHECK,N_PINP(b)
      • Vars
        • K(a);S_FLIGHT::B(B)
      • Refutation
        • K(a);P-FLIGHT,XB(C)
  • Actual
    • Q(D);N_PINP(b)
    • Threat
      • QAB1(D)
    • Vars
      • K(a);S_FLIGHT::B(B)
      • K(a);P-FLIGHT,XB(C)::QAR2(D),XP(b)
      • P(b);SBLOCK::QAR1(D)
      • P(b);OGATEB::QAR2(D)
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