MESON Chess Problem Database

Problem Display
PID: 210205 (4R3/1B6/1pN1P1p1/R2nPkb1/2Q4P/2B1pN2/8/6K1 w - - 0 1)

Gulyaev, Aleksandr Pavlovich (aka Grin, AP)

The Problemist, 1985

4R3/1B6/1pN1P1p1/R2nPkb1/2Q4P/2B1pN2/8/6K1

#2

11 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Sf6
      • 2.Se7#
  • Tries
    • 1.Sxg5?
      • threat
        • 2.Qe4#
      • 1...Sxc3
        • 2.Se7#
        • 2.Rf8#
      • 1...Sf6
        • 2.Se7#
      • 1...Sf4!
    • 1.Rf8+?
      • 1...Kxe6
        • 2.Bc8#
        • 2.Qxd5#
        • 2.Qg4#
      • 1...Sf6
        • 2.Se7#
      • 1...Bf6!
  • Keys
    • 1.Sh2!
      • threat
        • 2.Qg4#
      • 1...Bf4
        • 2.Qd3#
      • 1...Sf4
        • 2.Sd4#
      • 1...Sf6
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD,S_CUTB(d)::S(H)
  • Tries
    • Try
      • S(C);XB(d)
      • Threat
        • QAB1(D)
      • Vars
        • S(b);N_GUARD::S(H)
      • Refutation
        • S(b);
    • Try
      • R(K);CHECK
      • Vars
        • S(b);P_SPINS(b)::S(H)
      • Refutation
        • B(d);P_SPINB(d)
  • Actual
    • S(C);
    • Threat
      • QAB1(D)
    • Vars
      • B(d);SBLOCK::QAB(D)
      • S(b);SBLOCK::S(H)
      • S(b);N_GUARD,S_CUTB(d)::S(H)
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