MESON Chess Problem Database

Problem Display
PID: 133770 (8/4K3/2p5/3k2N1/8/1P6/4P3/Q7 w - - 0 1)

Andreev, Aleksandr Grigorevich

200 Shakhmatni Zadachi, 1983

8/4K3/2p5/3k2N1/8/1P6/4P3/Q7

#2

5 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Kd7?
      • 1...c5
        • 2.e4#
      • 1...Kc5!
    • 1.Qa4?
      • 1...Ke5
        • 2.Qe4#
      • 1...c5
        • 2.Qe4#
      • 1...Kc5!
    • 1.e3?
      • threat
        • 2.Qd4#
      • 1...Kc5
        • 2.Qa5#
      • 1...c5!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Qd4#
        • 2.Qe5#
      • 1...Ke4
        • 2.Qe5#
      • 1...Kc5
        • 2.Qa5#
      • 1...c5
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(E);P-FLIGHT
      • Vars
        • P(b);SBLOCK::P(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
        • P(b);SBLOCK::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • P(B);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • P(b);
  • Actual
    • S(D);
    • Threat
      • DUALS(2)
    • Vars
      • K(a);S_FLIGHT::QAR1(A)
      • K(a);P-FLIGHT::QAR2(A)
      • P(b);OGATEB,SBLOCK::QAB(A)
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