MESON Chess Problem Database

Problem Display
PID: 7884 (6rk/4N3/4b2K/6NQ/8/8/8/8 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Probleemblad, 1994

6rk/4N3/4b2K/6NQ/8/8/8/8

#2

4 + 3

2838 Fun with Chess Miniatures 1996
145 StrateGems 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Rg6+
      • 2.Kxg6#
    • 1...Ra8
      • 2.Kg6#
    • 1...Rb8
      • 2.Kg6#
    • 1...Rc8
      • 2.Kg6#
    • 1...Rd8
      • 2.Kg6#
    • 1...Re8
      • 2.Kg6#
    • 1...Rf8
      • 2.Kg6#
    • 1...Bh3
      • 2.Sf7#
    • 1...Bg4
      • 2.Sf7#
    • 1...Bf5
      • 2.Sf7#
    • 1...Bd7
      • 2.Sf7#
    • 1...Bf7
      • 2.Sxf7#
    • 1...Bc8
      • 2.Sf7#
  • Tries
    • 1.Qg6?
      • threat
        • 2.Qh7#
      • 1...Rg7
        • 2.Qxg7#
      • 1...Bf5
        • 2.Sf7#
        • 2.Qxg8#
      • 1...Rxg6+!
  • Keys
    • 1.Qf7!
      • threat
        • 2.Qh7#
      • 1...Rg6+
        • 2.Sxg6#
      • 1...Bxf7
        • 2.Sxf7#
      • 1...Rg7
        • 2.Qxg7#
      • 1...Bf5
        • 2.Qxg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 10
  • Sets
    • R(b);CHECK::QAR(B)+K(C),XR(b)
    • R(b);SBLOCK::QAR(B)+K(C)
    • R(b);::QAR(B)+K(C)
    • B(a);N_GUARD::S(A)
    • B(a);N_GUARD::S(A),XB(a)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • R(b);N_GUARD::QAB1(B),XR(b)
      • Refutation
        • R(b);CHECK,XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAR1(B)
    • Vars
      • R(b);CHECK,N_GUARD::S(D),XR(b)
      • B(a);XQ(B)::S(A),XB(a)
      • R(b);N_GUARD::QAB1(B),XR(b)
      • B(a);N_GUARD::QAR1(B),XR(b)
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