MESON Chess Problem Database

Problem Display
PID: 281264 (8/4Pp2/2B1p3/q1p2p1r/1Pp3pr/pNp1k1PP/1b2P3/3Q1K2 w - - 0 1)

de Haas, Bastian Evert

Schakend Nederland, 1984

8/4Pp2/2B1p3/q1p2p1r/1Pp3pr/pNp1k1PP/1b2P3/3Q1K2

#2

9 + 13

15601 Albrecht-Leiss-Degener Collection 2025
3713 Snap 2025

SOLUTION

  • SOUND
  • Sets
    • 1...Ba1
      • 2.Qc1#
    • 1...Bc1
      • 2.Qxc1#
    • 1...c2
      • 2.Qd2#
    • 1...cxb3
      • 2.Qd3#
    • 1...cxb4
      • 2.Qd4#
  • Tries
    • 1.Qd6?
      • threat
        • 2.Qf4#
        • 2.Qe5#
      • 1...cxb3
        • 2.Qf4#
        • 2.Qd3#
      • 1...cxb4
        • 2.Qf4#
        • 2.Qd4#
      • 1...Qc7
        • 2.Qxc5#
      • 1...c2
        • 2.Qf4#
        • 2.Qd2#
      • 1...f4
        • 2.Qxf4#
      • 1...e5
        • 2.Qxe5#
      • 1...f6
        • 2.Qf4#
        • 2.Qxe6#
      • 1...gxh3!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Qe5#
      • 1...cxb3
        • 2.Qd3#
      • 1...gxh3
        • 2.Qf3#
      • 1...cxb4
        • 2.Qd4#
      • 1...exd5
        • 2.e8Q#
        • 2.e8R#
      • 1...Qc7
        • 2.Qxc5#
      • 1...c2
        • 2.Qd2#
      • 1...f4
        • 2.Qe4#
      • 1...e5
        • 2.Qxe5#
      • 1...f6
        • 2.Qxe6#

This anticipates 43267(2002)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • B(a);N_GUARD::QAB(A)
    • B(a);N_GUARD::QAB(A),XB(a)
    • P(c);N_GUARD::QAB1(A)
    • P(e);N_GUARD,XS(D)::QAR1(A)
    • P(i);N_GUARD,XP(G)::QAB1(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(h);N_GUARD::QAB(A),XP(i)
        • P(j);::QAB1(A),XP(j)
        • P(l);::QAR2(A),XP(l)
      • Refutation
        • P(f);XP(F)
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • P(e);N_GUARD,XS(D)::QAR1(A)
      • P(f);N_GUARD,XP(F)::QAR1(A)
      • P(i);N_GUARD,XP(G)::QAB1(A)
      • P(l);XQ(A)::P=Q
      • Q(h);N_GUARD::QAB(A),XP(i)
      • P(c);N_GUARD::QAB1(A)
      • P(j);N_GUARD::QAR1(A)
      • P(l);::QAR2(A),XP(l)
      • P(m);N_GUARD::QAR(A),XP(l)
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