MESON Chess Problem Database

Problem Display
PID: 99893 (k1n4K/b1P5/8/7b/1Q1p4/5R2/6R1/r6B w - - 0 1)

Hoffmann, Fritz

Magyar Sakkelet, 1987

k1n4K/b1P5/8/7b/1Q1p4/5R2/6R1/r6B

#2

6 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bc5
      • 2.Qb8#
    • 1...Bb8
      • 2.Qxb8#
      • 2.cxb8Q#
    • 1...d3
      • 2.Qe4#
  • Tries
    • 1.Rb3?
      • threat
        • 2.Qb7#
      • 1...Bb6
        • 2.Ra2#
      • 1...Sb6
        • 2.Rg8#
      • 1...Sd6
        • 2.Rg8#
      • 1...Bf3!
  • Keys
    • 1.Rb2!
      • threat
        • 2.Qb7#
      • 1...Bxf3
        • 2.Bxf3#
      • 1...Bb6
        • 2.Ra3#
      • 1...Sb6
        • 2.Rf8#
      • 1...Sd6
        • 2.Rf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • B(d);N_GUARD::QAR1(D)
    • P(b);OGATE::QAB(D)
  • Tries
    • Try
      • R(C);
      • Threat
        • QAB1(D)
      • Vars
        • B(d);::B(A)+R(B),DCHECK
        • S(f);::B(A)+R(B),DCHECK
      • Refutation
        • B(c);
  • Actual
    • R(B);
    • Threat
      • QAB1(D)
    • Vars
      • B(c);OGATE,P_SPINB(c),XR(C)::B(A),XB(c)
      • B(d);::B(A)+R(C),DCHECK
      • S(f);::B(A)+R(C),DCHECK
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