MESON Chess Problem Database

Problem Display
PID: 109316 (8/5N2/5N2/3ppp1P/3p1kPp/5p1p/3K3P/Q7 w - - 0 1)

Sallay, Bela Albert

2nd HM., BCF 139. Ty., 1976-1977

8/5N2/5N2/3ppp1P/3p1kPp/5p1p/3K3P/Q7

#2

7 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...d3
      • 2.Qxe5#
  • Tries
    • 1.Qxd4+?
      • 1...e4
        • 2.Qe3#
        • 2.Qe5#
      • 1...exd4!
    • 1.Qb1?
      • threat
        • 2.Qxf5#
      • 1...fxg4
        • 2.Sxd5#
      • 1...e4
        • 2.Qb8#
      • 1...d3!
    • 1.Qc1?
      • threat
        • 2.Kd1#
        • 2.Ke1#
        • 2.Kc2#
        • 2.Kd3#
      • 1...f2
        • 2.Ke2#
      • 1...d3
        • 2.Kxd3#
      • 1...e4
        • 2.Qc7#
      • 1...fxg4!
    • 1.Qe1?
      • threat
        • 2.Qxe5#
      • 1...f2
        • 2.Qxf2#
      • 1...e4!
  • Keys
    • 1.Qg1!
      • 1...fxg4
        • 2.Qxg4#
      • 1...f2
        • 2.Qxf2#
      • 1...d3
        • 2.Qe3#
      • 1...e4
        • 2.Sxd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATE::QAB1(A),XP(g)
  • Tries
    • Try
      • Q(A);CHECK,XP(c)
      • Refutation
        • P(g);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(h)
      • Vars
        • P(h);SBLOCK,XP(D)::S(F),XP(f)
        • P(g);OGATEB::QAB(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Threat
        • DUALS(4)
      • Vars
        • P(a);::QAB(A)+K(B)
        • P(c);::QAB(A)+K(B),XP(c)
        • P(g);OGATEB::QAB(A)
      • Refutation
        • P(h);XP(D)
    • Try
      • Q(A);
      • Threat
        • QAB1(A),XP(g)
      • Vars
        • P(a);OGATEB::QAR2(A),XP(a)
      • Refutation
        • P(g);
  • Actual
    • Q(A);
    • Vars
      • P(h);OGATE,XP(D)::QAR1(A),XP(h)
      • P(a);OGATEB::QAR2(A),XP(a)
      • P(c);N_GUARD::QAB1(A)
      • P(g);SBLOCK::S(F),XP(f)
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