MESON Chess Problem Database

Problem Display
PID: 48961 (4Q1K1/4P1P1/7p/N1pp2pr/p2k4/3pp3/qPr2p1B/2N2b1B w - - 0 1)

le Grand, Henk

3/4 Prize, Het Belgisch Schaakbord (L'Echiquier Belge), 1978-1979

4Q1K1/4P1P1/7p/N1pp2pr/p2k4/3pp3/qPr2p1B/2N2b1B

#2

9 + 13

5110 Bekroonde Problemen 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Qc4
      • 2.Sc6#
    • 1...Rc4
      • 2.Sc6#
  • Tries
    • 1.Qf7?
      • threat
        • 2.Qf6#
      • 1...e2
        • 2.Qxf2#
      • 1...c4
        • 2.Qxd5#
      • 1...g4
        • 2.Qf4#
      • 1...Bg2!
    • 1.Qb8?
      • threat
        • 2.Be5#
        • 2.Qe5#
      • 1...Bg2
        • 2.Qe5#
      • 1...e2
        • 2.Qe5#
      • 1...c4
        • 2.Qa7#
        • 2.Qb6#
      • 1...g4
        • 2.Qf4#
      • 1...Rxh2!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Qf6#
      • 1...e2
        • 2.Qxd3#
      • 1...c4
        • 2.Qb6#
      • 1...Bg2
        • 2.Qxd3#
      • 1...g4
        • 2.Qxg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • Q(b);SBLOCK::S(E)
    • R(c);SBLOCK::S(E)
  • Tries
    • Try
      • Q(H);
      • Threat
        • QAB(H)
      • Vars
        • P(f);OGATEB::QAB(H),XP(d)
        • P(i);S_CUTQ(b)::QAR1(H),XP(j)
        • P(k);N_GUARD::QAR2(H)
      • Refutation
        • B(a);
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAB1(H)
        • P(f);::QAB1(H)
        • P(k);N_GUARD::QAR2(H)
      • Refutation
        • R(l);XB(D)
  • Actual
    • Q(H);
    • Threat
      • QAB(H)
    • Vars
      • P(f);S_CUTB(a)::QAR1(H),XP(e)
      • P(i);OGATEB::QAB(H)
      • B(a);N_GUARD::QAR1(H),XP(e)
      • P(k);OGATE::QAR(H),XP(k)
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