MESON Chess Problem Database

Problem Display
PID: 244817 (3Q4/8/1KpNp2p/4kN2/2b1p3/1p4P1/1Pr2B2/3r4 w - - 0 1)

Feoktistov, Aleksandr Fedorovich

Shakhmaty v SSSR, 1969

3Q4/8/1KpNp2p/4kN2/2b1p3/1p4P1/1Pr2B2/3r4

#2

7 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Sf7#
    • 1...Rd5
      • 2.Qh8#
    • 1...Bd5
      • 2.Qh8#
  • Tries
    • 1.Sxh6?
      • threat
        • 2.Sdf7#
      • 1...Kd5
        • 2.Sdf7#
      • 1...Rxd6
        • 2.Qg5#
      • 1...Rxf2
        • 2.Sxc4#
      • 1...e3!
    • 1.Bd4+?
      • 1...Kd5
        • 2.Sb5#
        • 2.Sb7#
        • 2.Sf7#
        • 2.Sc8#
        • 2.Se8#
      • 1...Rxd4!
  • Keys
    • 1.Se3!
      • threat
        • 2.Sf7#
      • 1...Kd4
        • 2.Sdxc4#
      • 1...Rxd6
        • 2.Qh8#
      • 1...Rxf2
        • 2.Sdxc4#
      • 1...Rd5
        • 2.Sg4#
      • 1...Bd5
        • 2.Sg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(f);P-FLIGHT::QAR(G)+S(F)
    • R(a);SBLOCK::QAB(G)
    • B(d);SBLOCK::QAB(G)
  • Tries
    • Try
      • S(D);XP(i)
      • Threat
        • S(F)
      • Vars
        • K(f);P-FLIGHT::QAR(G)+S(F)
        • R(a);SBLOCK,XS(F)::QAR2(G)
        • R(b);N_GUARD,XB(B)::S(F),XB(d)
      • Refutation
        • P(e);
    • Try
      • B(B);CHECK
      • Refutation
        • R(a);XB(B)
  • Actual
    • S(D);
    • Threat
      • S(F)
    • Vars
      • K(f);S_FLIGHT::QAR(G)+S(F),XB(d)
      • R(a);SBLOCK,XS(F)::QAB(G)
      • R(b);N_GUARD,XB(B)::S(F),XB(d)
      • R(a);SBLOCK::S(D)
      • B(d);SBLOCK::S(D)
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