MESON Chess Problem Database

Problem Display
PID: 9715 (r7/2QP2R1/4Nk1p/3P4/6P1/3nK3/8/8 w - - 0 1)

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

2nd Prize, Tagliche Rundschau, 1908-1909

r7/2QP2R1/4Nk1p/3P4/6P1/3nK3/8/8

#2

7 + 4

15 British Chess Magazine 1910
3310 2345 Chess Problems 1997
5454 Near Snap 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.d8Q#
      • 2.d8B#
    • 1...Ra2
      • 2.d8Q#
      • 2.d8B#
    • 1...Ra3
      • 2.d8Q#
      • 2.d8B#
    • 1...Ra4
      • 2.d8Q#
      • 2.d8B#
    • 1...Ra5
      • 2.d8Q#
      • 2.d8B#
    • 1...Ra6
      • 2.d8Q#
      • 2.d8B#
    • 1...Ra7
      • 2.d8Q#
      • 2.d8B#
    • 1...Re8
      • 2.dxe8S#
    • 1...Sc1
      • 2.Qf4#
      • 2.Qc3#
    • 1...Se1
      • 2.Qf4#
      • 2.Qc3#
    • 1...Sb2
      • 2.Qf4#
      • 2.Qc3#
    • 1...Sf2
      • 2.Qf4#
      • 2.Qc3#
    • 1...Sb4
      • 2.Qf4#
      • 2.Qc3#
    • 1...Sf4
      • 2.Qxf4#
      • 2.Qc3#
    • 1...Sc5
      • 2.Qf4#
  • Tries
    • 1.Kxd3?
      • threat
        • 2.Qf4#
        • 2.Qc3#
      • 1...Ra4
        • 2.d8Q#
        • 2.d8B#
      • 1...Rc8
        • 2.Qf4#
      • 1...Ra3+!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Sh5#
      • 1...Re8+
        • 2.dxe8S#
      • 1...Kxg7
        • 2.d8Q#
      • 1...Sxf4
        • 2.Qc3#
      • 1...h5
        • 2.Sxh5#

This anticipates 120716(1909)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(d);N_GUARD::P=Q
    • R(d);OGATE,P_PINS(D)::PXR(d)=S
    • S(a);N_GUARD::QAR2(E)
  • Tries
    • Try
      • K(A);P-FLIGHT,XS(a)
      • Threat
        • DUALS(2)
      • Vars
        • R(d);N_GUARD::P=Q
        • R(d);::QAR2(E)
      • Refutation
        • R(d);CHECK
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • R(d);CHECK,OGATE::PXR(d)=S
      • K(b);S_FLIGHT,XR(G)::P=Q
      • S(a);N_GUARD,XS(D)::QAB(E)
      • P(c);::S(D),XP(c)
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