MESON Chess Problem Database

Problem Display
PID: 39347 (8/2R2n2/8/2BkpQ2/8/8/2K5/8 w - - 0 1)

Lincoln, Robert A

The Problemist Supplement, 1999

8/2R2n2/8/2BkpQ2/8/8/2K5/8

#2

4 + 3

2786 More Fun with Chess Miniatures 2000
5454 Near Snap 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qd3#
  • Tries
    • 1.Kd3?
      • threat
        • 2.Qxf7#
      • 1...Sg5
        • 2.Qd7#
      • 1...Sh6
        • 2.Qd7#
      • 1...Sd8
        • 2.Qd7#
      • 1...Sh8
        • 2.Qd7#
      • 1...Sd6!
    • 1.Bd6?
      • 1...Kd4
        • 2.Qd3#
      • 1...Kxd6
        • 2.Qd7#
      • 1...Sg5
        • 2.Qxe5#
      • 1...Sh6
        • 2.Qxe5#
      • 1...Sd8
        • 2.Qxe5#
      • 1...Sh8
        • 2.Qxe5#
      • 1...Sxd6!
    • 1.Qf3+?
      • 1...Kc4
        • 2.Qb3#
        • 2.Qd3#
      • 1...Ke6
        • 2.Re7#
        • 2.Qxf7#
      • 1...e4!
  • Keys
    • 1.Bd4!
      • 1...Kxd4
        • 2.Qd3#
      • 1...Kd6
        • 2.Qd7#
      • 1...Sg5
        • 2.Qxe5#
      • 1...Sd6
        • 2.Qxe5#
      • 1...Sh6
        • 2.Qxe5#
      • 1...Sd8
        • 2.Qxe5#
      • 1...Sh8
        • 2.Qxe5#

Anticipated by 57453(1953)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • K(a);N_SPINP(b),S_FLIGHT::QAB1(C)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Threat
        • QAB(C),XS(c)
      • Vars
        • S(c);N_GUARD::QAR2(C)
      • Refutation
        • S(c);
    • Try
      • B(B);
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAR1(C)
        • K(a);N_SPINP(b),OGATEB,P-FLIGHT,XB(B)::QAR1(C)
        • S(c);N_GUARD::QAR1(C),XP(b)
      • Refutation
        • S(c);XB(B)
    • Try
      • Q(C);CHECK,N_PINP(b)
      • Refutation
        • P(b);P_SPINP(b)
  • Actual
    • B(B);
    • Vars
      • K(a);N_SPINP(b),OGATEB,P-FLIGHT,XB(B)::QAR1(C)
      • K(a);N_SPINP(b),P-FLIGHT::QAR1(C)
      • S(c);N_GUARD::QAR1(C),XP(b)
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