MESON Chess Problem Database

Problem Display
PID: 214892 (8/3N4/3p4/1P1kb1QB/8/1K6/8/B7 w - - 0 1)

Foster, Benjamin R

St. Louis Globe Democrat, 1878

8/3N4/3p4/1P1kb1QB/8/1K6/8/B7

#2

6 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Sc5?
      • 1...dxc5
        • 2.Qxe5#
      • 1...Kxc5!
    • 1.Qf4?
      • threat
        • 2.Bf7#
        • 2.Qc4#
      • 1...Ke6
        • 2.Qf7#
      • 1...Bd4
        • 2.Bf7#
      • 1...Bxf4!
    • 1.Qf6?
      • threat
        • 2.Bf3#
      • 1...Ke4
        • 2.Qf3#
      • 1...Bxf6!
    • 1.Qg4?
      • threat
        • 2.Bf7#
        • 2.Qc4#
      • 1...Bd4
        • 2.Bf7#
      • 1...Bf4!
  • Keys
    • 1.Sxe5!
      • 1...Ke4
        • 2.Bf3#
      • 1...Kc5
        • 2.Sd7#
      • 1...Ke6
        • 2.Bf7#
      • 1...dxe5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(F);
      • Vars
        • P(c);N_GUARD,SBLOCK,XS(F)::QAR1(D),XB(b)
      • Refutation
        • K(a);P-FLIGHT,XS(F)
    • Try
      • Q(D);N_PINB(b)
      • Threat
        • DUALS(2)
      • Vars
        • K(a);S_FLIGHT::QAB1(D)
        • B(b);::B(E)
      • Refutation
        • B(b);XQ(D)
    • Try
      • Q(D);N_PINB(b)
      • Threat
        • B(E)
      • Vars
        • K(a);S_FLIGHT::QAB1(D)
      • Refutation
        • B(b);XQ(D)
    • Try
      • Q(D);N_PINB(b)
      • Threat
        • DUALS(2)
      • Vars
        • B(b);::B(E)
      • Refutation
        • B(b);
  • Actual
    • S(F);XB(b)
    • Vars
      • K(a);S_FLIGHT::B(E)
      • K(a);P-FLIGHT::QAR(D)+S(F),DCHECK
      • P(c);OGATE,P_SPINP(c),XS(F)::QAR1(D),XP(c)
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