MESON Chess Problem Database

Problem Display
PID: 95070 (2K5/2N1kp2/5R2/Q7/3N4/8/8/8 w - - 0 1)

Yachnik, A

Cherkasskaya Pravda, 1983

2K5/2N1kp2/5R2/Q7/3N4/8/8/8

#2

5 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sf3?
      • 1...Kxf6
        • 2.Qg5#
      • 1...Kf8!
    • 1.Sde6?
      • 1...Kd6
        • 2.Qc5#
      • 1...Kxf6
        • 2.Qg5#
      • 1...fxe6!
    • 1.Sd5+?
      • 1...Ke8
        • 2.Qd8#
      • 1...Kf8!
    • 1.Se8?
      • 1...Kxe8
        • 2.Qd8#
      • 1...Kf8!
    • 1.Rxf7+?
      • 1...Kd6
        • 2.Se8#
        • 2.Rd7#
        • 2.Qd5#
      • 1...Kxf7!
    • 1.Qa2?
      • threat
        • 2.Qxf7#
      • 1...Kf8
        • 2.Qxf7#
      • 1...Kxf6!
    • 1.Qd5?
      • threat
        • 2.Rxf7#
        • 2.Qxf7#
        • 2.Qd6#
        • 2.Qd8#
      • 1...Kf8
        • 2.Qxf7#
      • 1...Kxf6!
    • 1.Qh5?
      • threat
        • 2.Qxf7#
      • 1...Kf8
        • 2.Qxf7#
      • 1...Kxf6!
  • Keys
    • 1.Sce6!
      • threat
        • 2.Qd8#
      • 1...Kd6
        • 2.Qc5#
      • 1...Kxf6
        • 2.Qg5#
      • 1...Ke8
        • 2.Qd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(A);
      • Vars
        • K(a);OGATEB,S_FLIGHT,XR(C)::QAB1(B)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • S(A);
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
        • K(a);OGATEB,S_FLIGHT,XR(C)::QAB1(B)
      • Refutation
        • P(b);XS(A)
    • Try
      • S(D);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • S(D);
      • Vars
        • K(a);P-FLIGHT,XS(D)::QAR1(B)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • R(C);CHECK,XP(b)
      • Refutation
        • K(a);P-FLIGHT,XR(C)
    • Try
      • Q(B);
      • Threat
        • QAR1(B),XP(b)
      • Vars
        • K(a);P_SPINP(b),S_FLIGHT::QAR1(B),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XR(C)
    • Try
      • Q(B);
      • Threat
        • DUALS(4)
      • Vars
        • K(a);P_SPINP(b),S_FLIGHT::QAR1(B),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XR(C)
    • Try
      • Q(B);
      • Threat
        • QAR1(B),XP(b)
      • Vars
        • K(a);P_SPINP(b),S_FLIGHT::QAR1(B),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XR(C)
  • Actual
    • S(D);
    • Threat
      • QAB1(B)
    • Vars
      • K(a);S_FLIGHT::QAB1(B)
      • K(a);OGATEB,S_FLIGHT,XR(C)::QAB1(B)
      • K(a);P-FLIGHT::QAR1(B)
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