MESON Chess Problem Database

Problem Display
PID: 266283 (5Rb1/Q7/2r3p1/2n1P3/3k4/1P6/1P1N1PBB/n3N1K1 w - - 0 1)

Friedberg, Uly

Probleemblad, 1950

5Rb1/Q7/2r3p1/2n1P3/3k4/1P6/1P1N1PBB/n3N1K1

#2

11 + 6

SOLUTION

  • SOUND
  • Tries
    • 1.Rd8+?
      • 1...Bd5
        • 2.Rxd5#
      • 1...Rd6!
    • 1.Qa4+?
      • 1...Bc4
        • 2.Qxc4#
      • 1...Sxa4!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Qc3#
      • 1...Scxb3
        • 2.Rf4#
      • 1...Sd3
        • 2.Sef3#
      • 1...Sa4
        • 2.Rf4#
      • 1...Se4
        • 2.Sdf3#
      • 1...Sa6
        • 2.Rf4#
      • 1...Se6
        • 2.Qd5#
      • 1...Sb7
        • 2.Rf4#
      • 1...Sd7
        • 2.Rf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(K);CHECK
      • Vars
        • B(f);N_GUARD,P_SPINB(f)::R1(K),XB(f)
      • Refutation
        • R(d);P_SPINR(d)
    • Try
      • Q(J);CHECK,N_PINS(c)
      • Vars
        • B(f);N_GUARD,P_SPINB(f)::QAR1(J),XB(f)
      • Refutation
        • S(c);XQ(J)
  • Actual
    • Q(J);N_PINS(c)
    • Threat
      • QAB1(J)
    • Vars
      • S(c);N_GUARD,XP(H)::R(K)
      • S(c);SBLOCK::S(A)
      • S(c);N_GUARD::R(K)
      • S(c);SBLOCK::S(D)
      • S(c);OGATE::QAR1(J)
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