MESON Chess Problem Database

Problem Display
PID: 10323 (1r6/1Q5p/2pPP2K/2P2P2/3P1kPp/R1N4n/3N1rpb/3BB3 w - - 0 1)

Shedey, Sergey Oleksandrovich

1st Prize=, Sahs, 1963

1r6/1Q5p/2pPP2K/2P2P2/3P1kPp/R1N4n/3N1rpb/3BB3

#2

13 + 9

3747 FIDE Album (1962-1964) 1968
5862 An ABC of Chess Problems 1970
4640 Chess Wizardry: The New ABC of Chess Problems 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Se2#
    • 1...Kg3
      • 2.Sd5#
  • Tries
    • 1.Qxc6?
      • threat
        • 2.Sd5#
      • 1...Ke3
        • 2.Qe4#
      • 1...Kg3
        • 2.Qf3#
      • 1...Rxd2
        • 2.Qf3#
        • 2.Qe4#
      • 1...Re2
        • 2.Qf3#
      • 1...Rf3
        • 2.Qxf3#
        • 2.Qe4#
      • 1...Rb3!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Qe5#
      • 1...Ke3
        • 2.Sd5#
      • 1...Kg3
        • 2.Se2#
      • 1...Re2
        • 2.Sxe2#
      • 1...Rf3
        • 2.Se2#

There are these versions: 118575

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(e);S_FLIGHT::R(D)+S(E)
    • K(e);P_SPINR(a),S_FLIGHT::R(D)+S(E)
  • Tries
    • Try
      • Q(M);XP(g)
      • Threat
        • S(E)
      • Vars
        • K(e);S_FLIGHT::QAR1(M)
        • K(e);P_SPINR(a),S_FLIGHT::QAR1(M)
        • R(a);N_GUARD::QAR1(M)
      • Refutation
        • R(i);
  • Actual
    • Q(M);
    • Threat
      • QAB1(M)
    • Vars
      • K(e);S_FLIGHT::R(D)+S(E),DCHECK
      • K(e);P_SPINR(a),S_FLIGHT::R(D)+S(E),DCHECK
      • R(a);N_GUARD::S(E),XR(a)
      • R(a);N_GUARD::S(E)
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