MESON Chess Problem Database

Problem Display
PID: 205742 (8/8/R4B2/1n1P4/3R4/2kP4/B7/3K4 w - - 0 1)

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

Krasnaya gazeta, 1925

8/8/R4B2/1n1P4/3R4/2kP4/B7/3K4

#2

7 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kb2
      • 2.Rb4#
  • Tries
    • 1.Kc1?
      • threat
        • 2.Rc6#
      • 1...Sa3
        • 2.Rxa3#
      • 1...Sd6
        • 2.Ra3#
      • 1...Sa7
        • 2.Ra3#
      • 1...Sxd4!
    • 1.Re4+?
      • 1...Kxd3
        • 2.Bb1#
      • 1...Sd4!
  • Keys
    • 1.Rb6!
      • 1...Kb2
        • 2.Ra4#
      • 1...Sxd4
        • 2.Rb3#
      • 1...Sa3
        • 2.Rb3#
      • 1...Sd6
        • 2.Rb3#
      • 1...Sa7
        • 2.Rb3#
      • 1...Sc7
        • 2.Rb3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::B(G)+R(D),DCHECK
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Threat
        • R(F)
      • Vars
        • S(b);N_GUARD::R(F),XS(b)
        • S(b);N_GUARD::R(F)
      • Refutation
        • S(b);P_SPINS(b),XR(D)
    • Try
      • R(D);CHECK
      • Vars
        • K(a);P-FLIGHT,XP(C)::B(B)
      • Refutation
        • S(b);P_SPINS(b)
  • Actual
    • R(F);
    • Vars
      • K(a);P_SPINS(b),S_FLIGHT::B(G)+R(D)
      • S(b);OGATE,P_SPINS(b),XR(D)::R1(F)
      • S(b);OGATE::R1(F)
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