MESON Chess Problem Database

Problem Display
PID: 144398 (8/4K3/8/2p1k3/1N1p1pP1/6r1/3NPPb1/5Q2 w - - 0 1)

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

Tidskrift for Schack, 1909

8/4K3/8/2p1k3/1N1p1pP1/6r1/3NPPb1/5Q2

#2

7 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Be4
      • 2.Sc4#
    • 1...d3
      • 2.Qa1#
  • Tries
    • 1.Qb1?
      • threat
        • 2.Sc4#
        • 2.Qf5#
      • 1...Rxg4
        • 2.Sc4#
      • 1...cxb4
        • 2.Qf5#
      • 1...d3
        • 2.Qa1#
        • 2.Qb2#
      • 1...f3
        • 2.Qe4#
        • 2.Qf5#
      • 1...Rc3
        • 2.Qf5#
      • 1...Be4
        • 2.Sc4#
        • 2.Qxe4#
      • 1...Bd5
        • 2.Qf5#
      • 1...c4
        • 2.Sxc4#
        • 2.Qf5#
      • 1...Rd3!
  • Keys
    • 1.e4!
      • threat
        • 2.Sc6#
      • 1...Bxe4
        • 2.Sc4#
      • 1...cxb4
        • 2.Qb5#
      • 1...dxe4 ep
        • 2.Qa1#
      • 1...fxe4 ep
        • 2.f4#
      • 1...f3
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • B(a);SBLOCK::S(B)
    • P(c);OGATEB::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);XP(F)::S(B)
        • P(e);XS(E)::QAR1(A)
        • R(b);::QAR1(A)
        • B(a);::QAR1(A)
      • Refutation
        • R(b);
  • Actual
    • P(C);
    • Threat
      • S(E)
    • Vars
      • B(a);SBLOCK,XP(C)::S(B)
      • P(e);OGATEB,XS(E)::QAR(A)
      • P(c);EP,OGATEB,XP(C)::QAB(A)
      • P(d);EP,OGATE,XP(C)::P(D)
      • P(d);S_CUTR(b)::S(E)
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