MESON Chess Problem Database

Problem Display
PID: 92908 (6K1/3N1Q2/8/1N6/1Pp1k3/1q3p2/2nPPP2/8 w - - 0 1)

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

Tidskrift for Schack, 1917

6K1/3N1Q2/8/1N6/1Pp1k3/1q3p2/2nPPP2/8

#2

8 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qa2
      • 2.Qxf3#
    • 1...Qa4
      • 2.Qxf3#
    • 1...Qb1
      • 2.Qxf3#
    • 1...Qb2
      • 2.Qxf3#
    • 1...Qxb4
      • 2.Qxf3#
    • 1...Se3
      • 2.Qxf3#
    • 1...Sd4
      • 2.Sd6#
    • 1...c3
      • 2.d3#
  • Tries
    • 1.Sc3+?
      • 1...Kd4
        • 2.Qd5#
        • 2.Qf4#
        • 2.Qf6#
        • 2.Qg7#
      • 1...Qxc3!
    • 1.Qg6+?
      • 1...Kd5
        • 2.e4#
      • 1...Kf4!
    • 1.d3+?
      • 1...cxd3
        • 2.exf3#
      • 1...Qxd3!
  • Keys
    • 1.d4!
      • threat
        • 2.Sc5#
      • 1...Qxb4
        • 2.Qxf3#
      • 1...Sxd4
        • 2.Sd6#
      • 1...cxd4 ep
        • 2.exf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • Q(b);N_GUARD::QAB1(G),XP(c)
    • Q(b);N_GUARD,XP(D)::QAB1(G),XP(c)
    • S(a);S_CUTQ(b)::QAB1(G),XP(c)
    • S(a);SBLOCK::S(E)
    • P(d);N_GUARD,P_PINQ(G),S_CUTQ(b)::P(A)
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • Q(b);XS(E)
    • Try
      • Q(G);CHECK
      • Vars
        • K(e);OGATE,S_FLIGHT::P(B)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • P(A);CHECK
      • Vars
        • P(d);P_PINQ(G),SBLOCK,XP(A)::P(B),XP(c)
      • Refutation
        • Q(b);XP(A)
  • Actual
    • P(A);
    • Threat
      • S(F)
    • Vars
      • Q(b);N_GUARD,XP(D)::QAB1(G),XP(c)
      • S(a);SBLOCK,XP(A)::S(E)
      • P(d);EP,P_PINQ(G),S_CUTQ(b),XP(A)::P(B),XP(c)
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