MESON Chess Problem Database

Problem Display
PID: 158417 (4k3/4P2n/6K1/3N4/4R2Q/8/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Bankovskaya gazeta, 1996

4k3/4P2n/6K1/3N4/4R2Q/8/8/8

#2

5 + 2

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Sg5
      • 2.Sf6#
    • 1...Sf6
      • 2.Sxf6#
  • Tries
    • 1.Kg7?
      • 1...Sg5
        • 2.Sf6#
      • 1...Sf6
        • 2.Sxf6#
      • 1...Sf8
        • 2.Sf6#
        • 2.exf8S#
      • 1...Kd7!
    • 1.Kxh7?
      • 1...Kf7
        • 2.Qh5#
        • 2.e8Q#
      • 1...Kd7!
    • 1.Re6?
      • threat
        • 2.Qa4#
      • 1...Kd7
        • 2.e8Q#
      • 1...Sf6
        • 2.Sxf6#
      • 1...Sf8+!
    • 1.Qg3?
      • 1...Kd7
        • 2.e8Q#
      • 1...Sg5
        • 2.Sf6#
      • 1...Sf6
        • 2.Sxf6#
      • 1...Sf8+!
    • 1.Qh2?
      • 1...Kd7
        • 2.e8Q#
      • 1...Sg5
        • 2.Sf6#
      • 1...Sf6
        • 2.Sxf6#
      • 1...Sf8+!
    • 1.Qf4?
      • 1...Kd7
        • 2.e8Q#
      • 1...Sg5
        • 2.Sf6#
      • 1...Sf6
        • 2.Sxf6#
      • 1...Sf8+!
  • Keys
    • 1.Qf6!
      • threat
        • 2.Qc6#
      • 1...Sf8+
        • 2.exf8S#
      • 1...Kd7
        • 2.e8Q#
      • 1...Sxf6
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD::S(C)
    • S(a);N_GUARD::S(C),XS(a)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Vars
        • S(a);N_GUARD::S(C)
        • S(a);N_GUARD::S(C),XS(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • K(D);S_FLIGHT,XS(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(A);
      • Threat
        • QAB(B)
      • Vars
        • K(b);OGATE,S_FLIGHT::P=Q
        • S(a);N_GUARD::S(C),XS(a)
      • Refutation
        • S(a);CHECK
    • Try
      • Q(B);
      • Vars
        • K(b);OGATE,S_FLIGHT::P=Q
        • S(a);N_GUARD::S(C)
        • S(a);N_GUARD::S(C),XS(a)
      • Refutation
        • S(a);CHECK
    • Try
      • Q(B);
      • Vars
        • K(b);OGATE,S_FLIGHT::P=Q
        • S(a);N_GUARD::S(C)
        • S(a);N_GUARD::S(C),XS(a)
      • Refutation
        • S(a);CHECK
    • Try
      • Q(B);
      • Vars
        • K(b);OGATE,S_FLIGHT::P=Q
        • S(a);N_GUARD::S(C)
        • S(a);N_GUARD::S(C),XS(a)
      • Refutation
        • S(a);CHECK
  • Actual
    • Q(B);
    • Threat
      • QAB(B)
    • Vars
      • S(a);CHECK,OGATE::PXS(a)=S
      • K(b);OGATE,S_FLIGHT::P=Q
      • S(a);XQ(B)::S(C),XS(a)
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