MESON Chess Problem Database

Problem Display
PID: 160308 (3R4/Q7/7n/4pN2/r1pPp2p/p4p2/2K1k3/R5B1 w - - 0 1)

Burda, Josef

Troll, 2016

3R4/Q7/7n/4pN2/r1pPp2p/p4p2/2K1k3/R5B1

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...h3
      • 2.Sg3#
    • 1...exd4
      • 2.Sxd4#
  • Tries
    • 1.Qxa4?
      • threat
        • 2.Qxc4#
      • 1...exd4
        • 2.Sxd4#
      • 1...c3
        • 2.Qb5#
        • 2.Qc4#
        • 2.Qa6#
      • 1...f2!
  • Keys
    • 1.dxe5!
      • threat
        • 2.Sd4#
        • 2.Rd2#
        • 2.Qf2#
        • 2.Qe3#
      • 1...Rxa7
        • 2.Sd4#
        • 2.Rd2#
      • 1...Sxf5
        • 2.Rd2#
        • 2.Qf2#
      • 1...f2
        • 2.Qxf2#
        • 2.Qe3#
      • 1...Sg4
        • 2.Sd4#
        • 2.Rd2#
      • 1...c3
        • 2.Qf2#
        • 2.Qe3#
      • 1...e3
        • 2.Sd4#
        • 2.Qxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • P(g);N_GUARD::S(E)
    • P(h);XP(D)::S(E),XP(h)
  • Tries
    • Try
      • Q(F);XR(d)
      • Threat
        • QAB(F),XP(e)
      • Vars
        • P(h);XP(D)::S(E),XP(h)
      • Refutation
        • P(c);
  • Actual
    • P(D);XP(h)
    • Threat
      • DUALS(4)
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