MESON Chess Problem Database

Problem Display
PID: 172352 (8/rk6/1N6/p1K5/2Q5/8/8/1R6 w - - 0 1)

Andreev, Aleksandr Grigorevich

Aktsent, 1997

8/rk6/1N6/p1K5/2Q5/8/8/1R6

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Kd4?
      • threat
        • 2.Qc8#
      • 1...Kb8
        • 2.Qc8#
      • 1...Ra8
        • 2.Sc8#
      • 1...Ra6!
    • 1.Kd5?
      • threat
        • 2.Qc8#
      • 1...Kb8
        • 2.Qc8#
      • 1...Ra8
        • 2.Sc8#
      • 1...Ra6!
    • 1.Sa8+?
      • 1...Kxa8
        • 2.Qg8#
      • 1...Kc8!
  • Keys
    • 1.Kd6!
      • threat
        • 2.Qc8#
      • 1...Kb8
        • 2.Qc8#
      • 1...Ra6
        • 2.Qc7#
      • 1...Ra8
        • 2.Sc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Threat
        • QAB1(B)
      • Vars
        • K(c);P-FLIGHT::QAR1(B)
        • R(b);SBLOCK::R(A)+S(D)
      • Refutation
        • R(b);
    • Try
      • K(C);P-FLIGHT
      • Threat
        • QAB1(B)
      • Vars
        • K(c);P-FLIGHT::QAR1(B)
        • R(b);SBLOCK::R(A)+S(D)
      • Refutation
        • R(b);
    • Try
      • S(D);CHECK
      • Vars
        • K(c);S_FLIGHT,XS(D)::QAR(B)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • K(C);S_FLIGHT
    • Threat
      • QAB1(B)
    • Vars
      • K(c);P-FLIGHT::QAR1(B)
      • R(b);P_PINS(D),SBLOCK::QAR1(B)
      • R(b);SBLOCK::R(A)+S(D)
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