MESON Chess Problem Database

Problem Display
PID: 173932 (8/4Q3/2pp4/3p4/8/6p1/4N1k1/4K2R w K - 0 1)

Zujevas, Nikolajus

Sachmatija, 2013

8/4Q3/2pp4/3p4/8/6p1/4N1k1/4K2R

#2

4 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...d4
      • 2.Qe4#
  • Tries
    • 1.Rg1+?
      • 1...Kh2
        • 2.Qh4#
        • 2.Qh7#
      • 1...Kf3
        • 2.Rxg3#
      • 1...Kh3!
    • 1.Qe3?
      • 1...Kxh1
        • 2.Qg1#
      • 1...d4
        • 2.Qe4#
      • 1...c5!
  • Keys
    • 1.Qe6!
      • 1...Kxh1
        • 2.Qh3#
      • 1...Kf3
        • 2.0-0#
      • 1...c5
        • 2.Qxd5#
      • 1...d4
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(c);N_GUARD::QAB(D)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::R1(B),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);
      • Vars
        • K(a);S_FLIGHT,XR(B)::QAR1(D)
        • P(c);N_GUARD::QAB(D)
      • Refutation
        • P(d);
  • Actual
    • Q(D);
    • Vars
      • K(a);S_FLIGHT,XR(B)::QAR2(D)
      • K(a);S_FLIGHT::0-0
      • P(d);N_GUARD::QAB(D),XP(c)
      • P(c);N_GUARD::QAB(D)
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