MESON Chess Problem Database

Problem Display
PID: 24953 (8/4p3/5p2/5k1K/2Q1Nb2/8/8/8 w - - 0 1)

Dorokhov, Yuri Georgievich

Radianska Doneccina, 1960

8/4p3/5p2/5k1K/2Q1Nb2/8/8/8

#2

3 + 4

3296 Shakhmatny zadachi miniaturi 1987
3813 300 Sachmatu Uzdaviniu 1991

SOLUTION

  • SOUND
  • Sets
    • 1...e5
      • 2.Sd6#
  • Tries
    • 1.Sf2?
      • threat
        • 2.Qe4#
      • 1...Be5
        • 2.Qg4#
      • 1...e5
        • 2.Qc8#
      • 1...Ke5!
    • 1.Sc5?
      • threat
        • 2.Qe6#
        • 2.Qe4#
      • 1...Bc1
        • 2.Qe4#
      • 1...Bd2
        • 2.Qe4#
      • 1...Bh2
        • 2.Qe4#
      • 1...Be3
        • 2.Qe4#
      • 1...Bg3
        • 2.Qe4#
      • 1...Be5
        • 2.Qe4#
        • 2.Qg4#
      • 1...Bg5
        • 2.Qe4#
      • 1...Bd6
        • 2.Qe4#
      • 1...Bh6
        • 2.Qe4#
      • 1...Bc7
        • 2.Qe4#
      • 1...Bb8
        • 2.Qe4#
      • 1...e6
        • 2.Qxe6#
        • 2.Qe4#
      • 1...Ke5!
    • 1.Qd5+?
      • 1...e5
        • 2.Sd6#
      • 1...Be5!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Qe4#
      • 1...Ke5
        • 2.Qd5#
      • 1...Be5
        • 2.Qg4#
      • 1...e5
        • 2.Qc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(d);N_GUARD,SBLOCK,S_CUTB(a)::S(B)
  • Tries
    • Try
      • S(B);
      • Threat
        • QAB1(A)
      • Vars
        • B(a);OGATE,SBLOCK::QAB1(A)
        • P(d);N_GUARD,SBLOCK::QAB(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAB1(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • P(d);P_SPINP(d)::S(B)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • S(B);
    • Threat
      • QAB1(A)
    • Vars
      • K(b);P-FLIGHT::QAR1(A)
      • B(a);OGATE,SBLOCK::QAB1(A)
      • P(d);N_GUARD,SBLOCK::QAB(A)
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