MESON Chess Problem Database

Problem Display
PID: 177717 (1BN5/2P3K1/4P3/2rpk3/3Np3/4P3/8/8 w - - 0 1)

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

Rigaer Tageblatt, 1909

1BN5/2P3K1/4P3/2rpk3/3Np3/4P3/8/8

#2

7 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc7+
      • 2.Bxc7#
  • Tries
    • 1.e7?
      • threat
        • 2.e8Q#
        • 2.e8R#
      • 1...Rxc7
        • 2.Bxc7#
      • 1...Rc1
        • 2.e8Q#
        • 2.e8R#
      • 1...Rc2
        • 2.e8Q#
        • 2.e8R#
      • 1...Rc3
        • 2.e8Q#
        • 2.e8R#
      • 1...Rc4
        • 2.e8Q#
        • 2.e8R#
      • 1...Ra5
        • 2.e8Q#
        • 2.e8R#
      • 1...Rb5
        • 2.e8Q#
        • 2.e8R#
      • 1...Rc6!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Sf7#
      • 1...Kxd6
        • 2.c8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • R(b);CHECK,OGATE,P_SPINR(b),XP(D)::B(F),XR(b)
  • Tries
    • Try
      • P(C);
      • Threat
        • P=Q
      • Vars
        • R(b);OGATE,P_PINP(C),P_SPINR(b),XP(D)::B(F),XR(b)
        • R(b);::P=Q
      • Refutation
        • R(b);
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • K(d);S_FLIGHT,XS(G)::P=S
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