MESON Chess Problem Database

Problem Display
PID: 245445 (8/8/3R4/5N2/5pkN/8/8/4QK2 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Kudesnik, 2010

8/8/3R4/5N2/5pkN/8/8/4QK2

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Rg6+?
      • 1...Kh5
        • 2.Sg7#
      • 1...Kh3!
    • 1.Qg3+?
      • 1...Kh5
        • 2.Sg7#
        • 2.Rh6#
        • 2.Qg6#
      • 1...fxg3!
    • 1.Qe2+?
      • 1...Kh3
        • 2.Qg2#
      • 1...Kg5
        • 2.Rg6#
      • 1...f3!
  • Keys
    • 1.Sf3!
      • 1...Kxf3
        • 2.Qe2#
      • 1...Kh3
        • 2.Qh4#
      • 1...Kxf5
        • 2.Qe6#
      • 1...Kh5
        • 2.Qh4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(b);S_FLIGHT::S(D)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • P(a);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
        • K(b);P-FLIGHT::R1(E)
      • Refutation
        • P(a);P_SPINP(a)
  • Actual
    • S(C);
    • Vars
      • K(b);OGATEB,S_FLIGHT,XS(C)::QAB1(A)
      • K(b);S_FLIGHT::QAR1(A)
      • K(b);OGATEB,S_FLIGHT,XS(D)::QAB1(A)
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