MESON Chess Problem Database

Problem Display
PID: 52474 (3q4/1n6/b4p2/1Q1p1Pp1/r1pNk1K1/1PP5/5p1B/3R1N2 w - - 0 1)

Ahues, Herbert Siegfried Oskar

1st Comm., Het Belgisch Schaakbord (L'Echiquier Belge), 1985-1986

3q4/1n6/b4p2/1Q1p1Pp1/r1pNk1K1/1PP5/5p1B/3R1N2

#2

9 + 10

5110 Bekroonde Problemen 2002
15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Qa5
      • 2.Qe8#
    • 1...Qe8
      • 2.Qxe8#
  • Tries
    • 1.Sg3+?
      • 1...Ke3
        • 2.Sc2#
      • 1...Ke5!
    • 1.Se2?
      • threat
        • 2.Rd4#
      • 1...Qb6
        • 2.Qxd5#
      • 1...d4
        • 2.Seg3#
      • 1...cxb3!
    • 1.Sf3?
      • threat
        • 2.Rd4#
      • 1...cxb3
        • 2.S3d2#
      • 1...Qb6
        • 2.Qxd5#
      • 1...d4!
    • 1.Qe8+?
      • 1...Qe7
        • 2.Qxe7#
      • 1...Qxe8!
  • Keys
    • 1.Sc2!
      • threat
        • 2.Rd4#
      • 1...cxb3
        • 2.Sd2#
      • 1...Qb6
        • 2.Qxd5#
      • 1...d4
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(j);N_GUARD::QAR(H)
    • Q(j);N_GUARD::QAR(H),XQ(j)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(d);P-FLIGHT::S(F)
      • Refutation
        • K(d);P-FLIGHT,P_SPINP(e)
    • Try
      • S(F);
      • Threat
        • R1(A)
      • Vars
        • Q(j);N_GUARD::QAB1(H),XP(e)
        • P(e);::S(F)
      • Refutation
        • P(c);XP(D)
    • Try
      • S(F);
      • Threat
        • R1(A)
      • Vars
        • P(c);XP(D)::S(F)
        • Q(j);N_GUARD::QAB1(H),XP(e)
      • Refutation
        • P(e);
    • Try
      • Q(H);CHECK
      • Vars
        • Q(j);N_GUARD,P_SPINQ(j)::QAR(H),XQ(j)
      • Refutation
        • Q(j);XQ(H)
  • Actual
    • S(F);
    • Threat
      • R1(A)
    • Vars
      • P(c);XP(D)::S(B)
      • Q(j);N_GUARD::QAB1(H),XP(e)
      • P(e);::S(B)
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