MESON Chess Problem Database

Problem Display
PID: 7719 (8/8/8/7p/7k/5KNr/8/4N1Q1 w - - 0 1)

Kolpakov, Viktor Sergeevich

Buletin Problemistic, 1993

8/8/8/7p/7k/5KNr/8/4N1Q1

#2

4 + 3

2838 Fun with Chess Miniatures 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Rxg3+
      • 2.Qxg3#
  • Tries
    • 1.Qc5?
      • threat
        • 2.Sg2#
        • 2.Qe7#
        • 2.Qxh5#
      • 1...Rh1
        • 2.Qxh5#
      • 1...Rh2
        • 2.Qxh5#
      • 1...Rxg3+!
    • 1.Qg2?
      • 1...Rxg3+
        • 2.Qxg3#
      • 1...Rh1
        • 2.Sf5#
      • 1...Rh2
        • 2.Sf5#
      • 1...Kg5!
  • Keys
    • 1.Kf4!
      • threat
        • 2.Sg2#
        • 2.Sf3#
        • 2.Sf5#
      • 1...Rxg3
        • 2.Qxg3#
      • 1...Rh1
        • 2.Qxh1#
      • 1...Rh2
        • 2.Qxh2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(a);CHECK,OGATE,XS(D)::QAB1(B),XR(a)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(3)
      • Vars
        • R(a);N_PINS(D)::QAR1(B),XP(c)
      • Refutation
        • R(a);CHECK,XS(D)
    • Try
      • Q(B);
      • Vars
        • R(a);CHECK,OGATE,XS(D)::QAB1(B),XR(a)
        • R(a);N_PINS(D)::S(D)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • K(C);N_SPINS(D),P-FLIGHT
    • Threat
      • DUALS(3)
    • Vars
      • R(a);OGATE,XS(D)::QAB1(B),XR(a)
      • R(a);OGATEB::QAR(B),XR(a)
      • R(a);OGATEB::QAR2(B),XR(a)
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