MESON Chess Problem Database

Problem Display
PID: 95235 (8/8/8/8/k1K5/8/1b6/5Q2 w - - 0 1)

Ferber, Eugene

Deutsches Wochenschach, 1899

8/8/8/8/k1K5/8/1b6/5Q2

#2

2 + 2

6490 yacpdb 2009
5454 Near Snap 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Ba1
      • 2.Qxa1#
  • Tries
    • 1.Qg2?
      • threat
        • 2.Qa8#
      • 1...Ka3
        • 2.Qa8#
      • 1...Bc3
        • 2.Qa2#
      • 1...Bd4
        • 2.Qa2#
      • 1...Ka5!
    • 1.Qd1+?
      • 1...Ka3
        • 2.Qb3#
      • 1...Ka5!
  • Keys
    • 1.Qf2!
      • threat
        • 2.Qa7#
      • 1...Ka3
        • 2.Qa7#
      • 1...Ka5
        • 2.Qa7#
      • 1...Bc3
        • 2.Qa2#
      • 1...Bd4
        • 2.Qa2#

This anticipates 76417(1929), 212984(1978), 267460(2013)

This is a version of 2879

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • B(a);N_GUARD::QAR(A),XB(a)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • K(b);P-FLIGHT::QAR(A)
        • B(a);OGATE::QAR2(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • K(b);P-FLIGHT::QAR(A)
      • K(b);P-FLIGHT::QAR2(A)
      • B(a);OGATE::QAR2(A)
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