MESON Chess Problem Database

Problem Display
PID: 125151 (8/8/5n2/2p1kpN1/2PR4/1P6/4K3/7Q w - - 0 1)

Sobek, Karel

Nove Prerovsko, 1961

8/8/5n2/2p1kpN1/2PR4/1P6/4K3/7Q

#2

6 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Qa1#
  • Tries
    • 1.Qh2+?
      • 1...f4
        • 2.Qxf4#
      • 1...Kxd4!
  • Keys
    • 1.Qh8!
      • 1...Kxd4
        • 2.Qxf6#
      • 1...cxd4
        • 2.Qb8#
      • 1...f4
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);OGATEB,S_FLIGHT,XR(E)::QAB(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • P(c);P_SPINP(c)::QAB1(A),XP(c)
      • Refutation
        • K(b);S_FLIGHT,XR(E)
  • Actual
    • Q(A);P_PINS(d)
    • Vars
      • K(b);S_FLIGHT,XR(E)::QAB(A),XS(d)
      • P(a);SBLOCK,XR(E)::QAB(A)
      • P(c);SBLOCK::R1(E)
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