MESON Chess Problem Database

Problem Display
PID: 117116 (1K6/8/1p1B4/1n1p2p1/3k4/3p4/1P1N2r1/2Q2N2 w - - 0 1)

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

Deutsche Schachzeitung, 1909

1K6/8/1p1B4/1n1p2p1/3k4/3p4/1P1N2r1/2Q2N2

#2

6 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sa3
      • 2.Qc3#
    • 1...Sc3
      • 2.Qxc3#
      • 2.bxc3#
    • 1...Sxd6
      • 2.Qc3#
    • 1...Sa7
      • 2.Qc3#
    • 1...Sc7
      • 2.Qc3#
  • Tries
    • 1.Qc2?
      • threat
        • 2.Qa4#
      • 1...Sxd6
        • 2.Qc3#
      • 1...Sa3
        • 2.Qc3#
      • 1...Sc3
        • 2.Qxc3#
        • 2.bxc3#
      • 1...dxc2!
    • 1.Qc6?
      • threat
        • 2.Qxb6#
      • 1...Sxd6
        • 2.Qc3#
      • 1...Rxd2!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qa4#
      • 1...Sxd6
        • 2.b4#
      • 1...Sa3
        • 2.bxa3#
        • 2.b3#
        • 2.b4#
      • 1...Sc3
        • 2.bxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • S(d);N_GUARD::QAB1(A)
    • S(d);N_GUARD,XB(E)::QAB1(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • S(d);N_GUARD,XB(E)::QAB1(A)
        • S(d);N_GUARD::QAB1(A)
      • Refutation
        • P(b);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAB(A),XP(g)
      • Vars
        • S(d);N_GUARD,XB(E)::QAB1(A)
      • Refutation
        • R(a);XS(D)
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • S(d);N_GUARD,XB(E)::QAB(A)+P(C)
      • S(d);OGATE::P(C),XS(d)
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