MESON Chess Problem Database

Problem Display
PID: 109820 (k6n/b7/1pK5/8/8/8/1Q6/8 w - - 0 1)

Rohr, Hugo

ABC des Echecs, 1906

k6n/b7/1pK5/8/8/8/1Q6/8

#2

2 + 4

6490 yacpdb 2009
5454 Near Snap 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Kb8
      • 2.Qxh8#
  • Tries
    • 1.Qg7?
      • threat
        • 2.Qb7#
      • 1...Kb8
        • 2.Qf8#
        • 2.Qxh8#
        • 2.Qb7#
        • 2.Qg8#
      • 1...Sf7!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Kc7#
      • 1...Kb8
        • 2.Qg8#
      • 1...Bb8
        • 2.Kxb6#

Anticipated by 38393(1877)

This anticipates 76886(1947), 108705(1980), 77497(1992)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT,P_SPINP(a)::QAR(A),XS(d)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Refutation
        • S(d);
  • Actual
    • Q(A);
    • Threat
      • QAB(A)+K(B)
    • Vars
      • K(c);P-FLIGHT::QAR(A)
      • B(b);SBLOCK::QAB(A)+K(B),XP(a)
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