MESON Chess Problem Database

Problem Display
PID: 189436 (6B1/Np4p1/3p4/3R3r/2kp4/K4R1p/3p1N2/1b6 w - - 0 1)

Kubbel, Leonid Ivanovich (AKA Kubbel, Karl Artur Leonid)

4th Prize, Pravo lidu, 1911

6B1/Np4p1/3p4/3R3r/2kp4/K4R1p/3p1N2/1b6

#2

6 + 9

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Rf8?
      • threat
        • 2.Rc8#
      • 1...Kc3
        • 2.Rc8#
      • 1...Bf5!
    • 1.Ra5+?
      • 1...Rd5
        • 2.Bxd5#
      • 1...d5!
    • 1.Rb5+?
      • 1...Rd5
        • 2.Bxd5#
      • 1...d5!
  • Keys
    • 1.Rf7!
      • threat
        • 2.Rc7#
      • 1...Kc3
        • 2.Rc7#
      • 1...Kxd5
        • 2.Rf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);
      • Threat
        • R(C)
      • Vars
        • K(d);P-FLIGHT::R(C)
      • Refutation
        • B(a);
    • Try
      • R(D);CHECK
      • Vars
        • R(f);N_GUARD,P_SPINR(f)::B(F),XR(f)
      • Refutation
        • P(g);P_SPINP(g)
    • Try
      • R(D);CHECK
      • Vars
        • R(f);N_GUARD,P_SPINR(f)::B(F),XR(f)
      • Refutation
        • P(g);P_SPINP(g)
  • Actual
    • R(C);
    • Threat
      • R(C)
    • Vars
      • K(d);P-FLIGHT::R(C)
      • K(d);OGATEB,S_FLIGHT,XR(D)::B(F)+R(C),DCHECK
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