MESON Chess Problem Database

Problem Display
PID: 7576 (4R3/8/4Np2/4k3/8/3K1B2/8/3Q4 w - - 0 1)

Chepizhni, Viktor Ivanovich

Sp. Prize, Shakhmaty v SSSR, 1991

4R3/8/4Np2/4k3/8/3K1B2/8/3Q4

#2

5 + 2

2838 Fun with Chess Miniatures 1996
133 The Problemist Supplement 2002
6167 Viktor Chepizhny 2007

SOLUTION

  • SOUND
  • Tries
    • 1.Kc2?
      • threat
        • 2.Qd5#
      • 1...f5
        • 2.Qd4#
      • 1...Kf5!
    • 1.Ke2?
      • threat
        • 2.Qd5#
      • 1...f5
        • 2.Qd4#
      • 1...Kf5!
    • 1.Kc3?
      • threat
        • 2.Qd5#
      • 1...f5
        • 2.Qd4#
      • 1...Kf5!
    • 1.Ke3?
      • threat
        • 2.Sg7#
        • 2.Qd5#
      • 1...f5
        • 2.Qd4#
      • 1...Kf5!
    • 1.Kc4?
      • threat
        • 2.Qd5#
      • 1...f5
        • 2.Qd4#
      • 1...Kf5!
    • 1.Bb7?
      • 1...Kf5
        • 2.Qh5#
      • 1...Kd6
        • 2.Ke4#
      • 1...f5!
    • 1.Ba8?
      • 1...Kf5
        • 2.Qh5#
      • 1...Kd6
        • 2.Ke4#
      • 1...f5!
    • 1.Qc2?
      • threat
        • 2.Qc5#
      • 1...Kf5
        • 2.Kd4#
      • 1...Kd6
        • 2.Qc7#
      • 1...f5!
    • 1.Qe2+?
      • 1...Kf5
        • 2.Qe4#
      • 1...Kd6!
    • 1.Qa1+?
      • 1...Kd6
        • 2.Qd4#
      • 1...Kf5!
    • 1.Qe1+?
      • 1...Kf5
        • 2.Qe4#
      • 1...Kd6!
    • 1.Qg1?
      • threat
        • 2.Qc5#
      • 1...Kd6
        • 2.Qd4#
      • 1...f5
        • 2.Qd4#
      • 1...Kf5!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Qf4#
      • 1...Kf5
        • 2.Qe4#
      • 1...Kd6
        • 2.Qd4#
      • 1...f5
        • 2.Qd4#

FEATURES

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