MESON Chess Problem Database

Problem Display
PID: 10720 (1Q6/2B5/3R4/1pp5/k7/8/1K6/8 w - - 0 1)

Hoffmann, Fritz

Schach, 1967

1Q6/2B5/3R4/1pp5/k7/8/1K6/8

#2

4 + 3

3295 Einfuhrung in die Welt des Schachproblem 1984
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...b4
      • 2.Ra6#
      • 2.Qe8#
  • Tries
    • 1.Kc3?
      • threat
        • 2.Ra6#
        • 2.Qa7#
        • 2.Qa8#
      • 1...Ka3
        • 2.Ra6#
        • 2.Qa7#
        • 2.Qa8#
      • 1...b4+!
    • 1.Rd5?
      • 1...c4
        • 2.Qxb5#
      • 1...b4
        • 2.Qe8#
      • 1...Kb4!
    • 1.Qg8?
      • threat
        • 2.Qb3#
      • 1...Kb4
        • 2.Qb3#
      • 1...b4
        • 2.Qe8#
      • 1...c4!
  • Keys
    • 1.Qf8!
      • 1...Kb4
        • 2.Rd4#
      • 1...c4
        • 2.Ra6#
      • 1...b4
        • 2.Qe8#

Anticipated by 142787(1880)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Threat
        • DUALS(3)
      • Refutation
        • P(b);CHECK
    • Try
      • R(B);
      • Vars
        • P(c);::QAB1(D),XP(b)
        • P(b);OGATEB,SBLOCK::QAB(D)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
    • Try
      • Q(D);
      • Threat
        • QAB1(D)
      • Vars
        • K(a);P-FLIGHT::QAR1(D)
        • P(b);OGATEB,SBLOCK::QAB(D)
      • Refutation
        • P(c);
  • Actual
    • Q(D);
    • Vars
      • K(a);P-FLIGHT::R(B)
      • P(c);::R(B)
      • P(b);OGATEB,SBLOCK::QAB(D)
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