MESON Chess Problem Database

Problem Display
PID: 41281 (8/2ppK2B/3rp2p/2BPk3/3pp1R1/8/nQp1N1NR/b3n2q w - - 0 1)

le Grand, Piet

4th HM., Probleemblad, 2002

8/2ppK2B/3rp2p/2BPk3/3pp1R1/8/nQp1N1NR/b3n2q

#2

9 + 13

102 Probleemblad 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg2
      • 2.Rh5#
    • 1...Qg1
      • 2.Rh5#
    • 1...Rxd5
      • 2.Rxe4#
    • 1...exd5
      • 2.Bxd4#
    • 1...h5
      • 2.Rg5#
  • Tries
    • 1.Se3?
      • threat
        • 2.Bxd4#
      • 1...Rxd5
        • 2.Sc4#
      • 1...Sf3
        • 2.Rxe4#
      • 1...Bxb2!
    • 1.Qxa2?
      • threat
        • 2.Rxe4#
      • 1...Qxg2
        • 2.Rh5#
      • 1...e3
        • 2.Re4#
      • 1...exd5!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Rxe4#
      • 1...Qxg2
        • 2.Rh5#
      • 1...exd5
        • 2.Qg3#
      • 1...Sc3
        • 2.Bxd4#
      • 1...e3
        • 2.Re4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(c);N_GUARD,XS(C)::R(D)
    • Q(c);N_GUARD::R(D)
    • R(i);SBLOCK,XP(G)::R1(E),XP(g)
    • P(j);SBLOCK,XP(G)::B(F),XP(f)
    • P(k);N_GUARD::R(E)
  • Tries
    • Try
      • S(C);
      • Threat
        • B(F),XP(f)
      • Vars
        • R(i);SBLOCK,XP(G)::S(C)
        • S(b);S_CUTQ(c)::R1(E),XP(g)
      • Refutation
        • B(a);N_SPINP(f),XQ(A)
    • Try
      • Q(A);N_PINP(f),XS(d)
      • Threat
        • R1(E),XP(g)
      • Vars
        • Q(c);N_GUARD,XS(C)::R(D)
        • P(g);::R1(E)
      • Refutation
        • P(j);XP(G)
  • Actual
    • Q(A);N_PINP(f)
    • Threat
      • R1(E),XP(g)
    • Vars
      • Q(c);N_GUARD,XS(C)::R(D)
      • P(j);SBLOCK,XP(G)::QAB(A)
      • S(d);S_CUTB(a)::B(F),XP(f)
      • P(g);::R1(E)
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