MESON Chess Problem Database

Problem Display
PID: 172425 (7n/3PR3/5kp1/8/8/3Q1K2/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1997

7n/3PR3/5kp1/8/8/3Q1K2/8/8

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Qe3?
      • threat
        • 2.Qe5#
      • 1...Kf5
        • 2.Qf4#
        • 2.Qe5#
      • 1...g5
        • 2.Qe6#
      • 1...Sf7!
    • 1.Qd6+?
      • 1...Kf5
        • 2.Re5#
        • 2.Qf4#
        • 2.Qe5#
      • 1...Kg5!
    • 1.d8Q?
      • 1...Kg5
        • 2.Rh7#
      • 1...g5
        • 2.Q8d6#
      • 1...Sf7!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Qe5#
      • 1...Kxe7
        • 2.d8Q#
      • 1...Sf7
        • 2.Rxf7#
      • 1...g5
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • P(b);SBLOCK::QAR1(A)
      • Refutation
        • S(c);
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(C);
      • Vars
        • K(a);S_FLIGHT::QAB(C)+R(D)
        • P(b);SBLOCK::QAR2(C)
      • Refutation
        • S(c);
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(a);S_FLIGHT,XR(D)::P=Q
      • S(c);N_GUARD::R1(D),XS(c)
      • P(b);SBLOCK::QAR1(A)
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