MESON Chess Problem Database

Problem Display
PID: 251373 (2r2rB1/3R2q1/pP4N1/pPkNR3/Q7/5p2/7b/7K w - - 0 1)

Schlegl, G?

Die Schwalbe, 1930

2r2rB1/3R2q1/pP4N1/pPkNR3/Q7/5p2/7b/7K

#2

9 + 8

SOLUTION

  • SOUND
  • Tries
    • 1.Qc2+?
      • 1...Kd4
        • 2.Sde7#
        • 2.Re4#
      • 1...Kxb5!
    • 1.Qa3+?
      • 1...Kc4
        • 2.Se3#
      • 1...Kd4
        • 2.Sde7#
      • 1...Kxb5!
  • Keys
    • 1.Qxa5!
      • threat
        • 2.Qb4#
      • 1...Kc4
        • 2.Se3#
      • 1...Kd4
        • 2.Sde7#
      • 1...axb5
        • 2.Qc3#
      • 1...Rf4
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);CHECK
      • Refutation
        • K(d);P-FLIGHT,XP(C)
    • Try
      • Q(B);CHECK
      • Vars
        • K(d);N_GUARD,P-FLIGHT::B(I)+S(D),DCHECK
        • K(d);N_GUARD,S_FLIGHT::R(H)+S(D)
      • Refutation
        • K(d);P-FLIGHT,XP(C)
  • Actual
    • Q(B);XP(c)
    • Threat
      • QAB1(B)
    • Vars
      • K(d);P-FLIGHT::B(I)+S(D),DCHECK
      • K(d);S_CUTB(a),S_CUTQ(f),S_FLIGHT::R(H)+S(D)
      • P(e);P_SPINP(e),SBLOCK,XP(C)::QAR2(B)
      • R(h);S_CUTB(a)::R(E)+S(D)
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