MESON Chess Problem Database

Problem Display
PID: 9740 (8/8/6B1/3Q2p1/K6B/3N4/1p1P4/1N1k4 w - - 0 1)

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

1st Prize, Deutsche Schachzeitung, 1909

8/8/6B1/3Q2p1/K6B/3N4/1p1P4/1N1k4

#2

7 + 3

15 British Chess Magazine 1911
1829 The Theory of Pawn Promotion 1912
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Tries
    • 1.Sxb2+?
      • 1...Ke2
        • 2.Bd3#
        • 2.Qg2#
        • 2.Qd3#
      • 1...Kc1!
    • 1.Sf4?
      • threat
        • 2.Qh1#
      • 1...Kc1
        • 2.Qh1#
      • 1...gxf4!
    • 1.Qh1+?
      • 1...Kc2
        • 2.Sc1#
        • 2.Sf2#
        • 2.Sb4#
        • 2.Sf4#
        • 2.Sc5#
        • 2.Se5#
      • 1...Ke2!
    • 1.Qc4?
      • threat
        • 2.Sxb2#
      • 1...gxh4
        • 2.Bh5#
      • 1...Ke2!
  • Keys
    • 1.Sc1!
      • threat
        • 2.Qh1#
      • 1...Kxc1
        • 2.Qh1#
      • 1...bxc1Q
        • 2.Qf3#
      • 1...bxc1S
        • 2.Sc3#
      • 1...bxc1B
        • 2.Sc3#
        • 2.Qf3#
      • 1...bxc1R
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);CHECK,XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(C);
      • Threat
        • QAR(F)
      • Vars
        • K(a);P-FLIGHT::QAR(F)
      • Refutation
        • P(c);XS(C)
    • Try
      • Q(F);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);
      • Threat
        • S(C),XP(b)
      • Vars
        • P(c);N_GUARD,XB(E)::B(G)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(C);
    • Threat
      • QAR(F)
    • Vars
      • K(a);P-FLIGHT,XS(C)::QAR(F)
      • P(b);SBLOCK,XS(C)::QAB(F)
      • P(b);SBLOCK,XS(C)::S(A)
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