MESON Chess Problem Database

Problem Display
PID: 105524 (4krR1/Np2r3/8/8/4Q3/5R2/8/5K2 w - - 0 1)

Baja, Victor

Northwest Chess, 1976

4krR1/Np2r3/8/8/4Q3/5R2/8/5K2

#2

5 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qe6?
      • threat
        • 2.Rfxf8#
        • 2.Rgxf8#
        • 2.Qc8#
      • 1...Kd8
        • 2.Qc8#
      • 1...Rxg8
        • 2.Qc8#
      • 1...Rxe6!
  • Keys
    • 1.Rf7!
      • threat
        • 2.Qxe7#
      • 1...Kd7
        • 2.Qxe7#
      • 1...Kxf7
        • 2.Qg6#
      • 1...Kd8
        • 2.Qxe7#
      • 1...Rxe4
        • 2.Rgxf8#
      • 1...Re5
        • 2.Rgxf8#
      • 1...Re6
        • 2.Rgxf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(3)
      • Vars
        • K(c);N_SPINR(b),P-FLIGHT,P_SPINR(d)::QAR1(C)
        • R(d);N_PINR(B),XR(E)::QAR2(C)
      • Refutation
        • R(b);N_SPINR(b),P_SPINR(d),XQ(C)
  • Actual
    • R(B);
    • Threat
      • QAR1(C),XR(b)
    • Vars
      • K(c);S_FLIGHT::QAR1(C),XR(b)
      • K(c);N_SPINR(b),OGATEB,S_FLIGHT,XR(B)::QAB1(C)
      • K(c);N_SPINR(b),P-FLIGHT,P_SPINR(d)::QAB1(C),XR(b)
      • R(b);N_SPINR(b),P_SPINR(d),XQ(C)::R1(E),XR(d)
      • R(b);::R1(E),XR(d)
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