MESON Chess Problem Database

Problem Display
PID: 75987 (3k1K2/r7/2Q5/3P1bN1/8/8/8/8 w - - 0 1)

Zadro, Boris

StrateGems, 2007

3k1K2/r7/2Q5/3P1bN1/8/8/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Sf7#
    • 1...Ra2
      • 2.Sf7#
    • 1...Ra3
      • 2.Sf7#
    • 1...Ra4
      • 2.Sf7#
    • 1...Ra5
      • 2.Sf7#
    • 1...Ra6
      • 2.Sf7#
    • 1...Rc7
      • 2.Qe8#
    • 1...Rf7+
      • 2.Sxf7#
    • 1...Ra8
      • 2.Sf7#
    • 1...Bb1
      • 2.Se6#
    • 1...Bc2
      • 2.Se6#
    • 1...Bd3
      • 2.Se6#
    • 1...Be4
      • 2.Se6#
    • 1...Be6
      • 2.Sxe6#
    • 1...Bg6
      • 2.Se6#
    • 1...Bd7
      • 2.Sf7#
    • 1...Bh7
      • 2.Se6#
  • Tries
    • 1.Qb7?
      • threat
        • 2.Sf7#
      • 1...Be6
        • 2.Sxe6#
      • 1...Bg6
        • 2.Se6#
      • 1...Rxb7!
  • Keys
    • 1.d6!
      • threat
        • 2.Qe8#
      • 1...Rf7+
        • 2.Sxf7#
      • 1...Rd7
        • 2.Qa8#
      • 1...Re7
        • 2.dxe7#
      • 1...Bg6
        • 2.Se6#
      • 1...Bd7
        • 2.Sf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 14
  • Sets
    • R(b);N_GUARD::S(B)
    • R(b);SBLOCK::QAR1(C)
    • R(b);CHECK,N_GUARD::S(B),XR(b)
    • B(a);N_GUARD::S(B)
    • B(a);N_GUARD::S(B),XB(a)
    • B(a);S_CUTR(b)::S(B)
  • Tries
    • Try
      • Q(C);
      • Threat
        • S(B)
      • Vars
        • B(a);N_GUARD::S(B),XB(a)
        • B(a);N_GUARD::S(B)
      • Refutation
        • R(b);XQ(C)
  • Actual
    • P(A);
    • Threat
      • QAR1(C)
    • Vars
      • R(b);CHECK,N_GUARD::S(B),XR(b)
      • R(b);N_GUARD,SBLOCK,S_CUTB(a)::QAR(C)
      • R(b);OGATE::P(A),XR(b)
      • B(a);N_GUARD::S(B)
      • B(a);S_CUTR(b)::S(B)
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