MESON Chess Problem Database

Problem Display
PID: 184778 (7K/Q4R2/8/3pk3/3N4/3p2P1/1b6/8 w - - 0 1)

Jewetsky, Feodor Orestovich

Shakhmatnoe obozrenie, 1908

7K/Q4R2/8/3pk3/3N4/3p2P1/1b6/8

#2

5 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Re7#
    • 1...Kd6
      • 2.Qc7#
      • 2.Qe7#
    • 1...Bxd4
      • 2.Qe7#
  • Tries
    • 1.Re7+?
      • 1...Kd6
        • 2.Re6#
        • 2.Qc7#
      • 1...Kf6!
    • 1.Qb8+?
      • 1...Ke4
        • 2.Qf4#
      • 1...Kxd4!
    • 1.Qc7+?
      • 1...Ke4
        • 2.Qf4#
      • 1...Kxd4!
  • Keys
    • 1.Rf6!
      • threat
        • 2.Re6#
      • 1...Ke4
        • 2.Re6#
      • 1...Kxf6
        • 2.Qg7#
      • 1...Bxd4
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(d);P-FLIGHT,P_PINS(B)::R(D)
    • B(a);SBLOCK,XS(B)::QAR2(C)
  • Tries
    • Try
      • R(D);CHECK
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(d);OGATE,P-FLIGHT,P_PINS(B)::QAR1(C)
      • Refutation
        • K(d);S_FLIGHT,XS(B)
    • Try
      • Q(C);CHECK
      • Vars
        • K(d);OGATE,P-FLIGHT,P_PINS(B)::QAR1(C)
      • Refutation
        • K(d);S_FLIGHT,XS(B)
  • Actual
    • R(D);
    • Threat
      • R1(D)
    • Vars
      • K(d);P-FLIGHT::R(D)
      • K(d);OGATEB,S_FLIGHT,XR(D)::QAB1(C)
      • B(a);SBLOCK,XS(B)::QAR2(C)
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