MESON Chess Problem Database

Problem Display
PID: 90190 (3Q2b1/1N6/4p3/3pkp1p/7P/1N3KP1/8/8 w - - 0 1)

Wielgos, Oskar

Die Schwalbe, 1983

3Q2b1/1N6/4p3/3pkp1p/7P/1N3KP1/8/8

#2

6 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bf7
      • 2.Qh8#
    • 1...Bh7
      • 2.Qh8#
    • 1...d4
      • 2.Qxd4#
    • 1...f4
      • 2.Qg5#
  • Tries
    • 1.Ke3?
      • 1...d4+
        • 2.Qxd4#
      • 1...Bf7
        • 2.Qh8#
      • 1...Bh7
        • 2.Qh8#
      • 1...f4+!
    • 1.Qf8?
      • threat
        • 2.Qg7#
      • 1...f4
        • 2.Qxf4#
        • 2.gxf4#
      • 1...d4!
  • Keys
    • 1.Sd6!
      • 1...d4
        • 2.Sc4#
      • 1...Bf7
        • 2.Sxf7#
      • 1...Bh7
        • 2.Sf7#
      • 1...f4
        • 2.gxf4#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 4
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • B(f);OGATE::QAB(F)
    • P(a);OGATE::QAB1(F),XP(a)
    • P(c);OGATEB::QAR2(F)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • P(a);CHECK,OGATE::QAB1(F),XP(a)
        • B(f);OGATE::QAB(F)
      • Refutation
        • P(c);CHECK
    • Try
      • Q(F);
      • Threat
        • QAB(F)
      • Refutation
        • P(a);
  • Actual
    • S(E);
    • Vars
      • P(a);N_GUARD::S(E)
      • B(f);N_GUARD::S(E),XB(f)
      • B(f);N_GUARD::S(E)
      • P(c);OGATE::P(C),XP(c)
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