MESON Chess Problem Database

Problem Display
PID: 184780 (5K2/2pN3p/2p1k3/8/1p4R1/3Q4/2N5/2r1b3 w - - 0 1)

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

Novoye Vremya, 1908

5K2/2pN3p/2p1k3/8/1p4R1/3Q4/2N5/2r1b3

#2

5 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...h5
      • 2.Rg6#
    • 1...h6
      • 2.Rg6#
  • Tries
    • 1.Qe2+?
      • 1...Kd5
        • 2.Rd4#
        • 2.Qe5#
      • 1...Kf5
        • 2.Sd4#
        • 2.Qe4#
      • 1...Kd6
        • 2.Rd4#
      • 1...Kxd7!
    • 1.Qc4+?
      • 1...Kf5
        • 2.Se3#
        • 2.Qe4#
      • 1...Kd6
        • 2.Rd4#
      • 1...Kxd7!
    • 1.Qf5+?
      • 1...Kd6
        • 2.Rd4#
      • 1...Kxf5!
    • 1.Qb3+?
      • 1...Kf5
        • 2.Se3#
      • 1...Kd6
        • 2.Rd4#
      • 1...Kxd7!
    • 1.Qe3+?
      • 1...Kd5
        • 2.Rd4#
        • 2.Qe5#
      • 1...Kf5
        • 2.Rg5#
        • 2.Qe4#
      • 1...Kd6
        • 2.Rd4#
      • 1...Kxd7!
  • Keys
    • 1.Qh3!
      • threat
        • 2.Rd4#
      • 1...Kd5
        • 2.Rd4#
      • 1...Kf5
        • 2.Sd4#
      • 1...Kd6
        • 2.Rd4#
      • 1...Kxd7
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • P(g);N_GUARD::R(C)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(e);P-FLIGHT::R(C)
      • Refutation
        • K(e);S_FLIGHT,XS(D)
    • Try
      • Q(B);CHECK
      • Vars
        • K(e);P-FLIGHT::R(C)
      • Refutation
        • K(e);S_FLIGHT,XS(D)
    • Try
      • Q(B);CHECK
      • Vars
        • K(e);P-FLIGHT::R(C)
      • Refutation
        • K(e);S_FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(e);S_FLIGHT::S(A)
        • K(e);P-FLIGHT::R(C)
      • Refutation
        • K(e);S_FLIGHT,XS(D)
    • Try
      • Q(B);CHECK
      • Vars
        • K(e);P-FLIGHT::R(C)
      • Refutation
        • K(e);S_FLIGHT,XS(D)
  • Actual
    • Q(B);
    • Threat
      • QAB(B)+R(C)
    • Vars
      • K(e);S_FLIGHT::R1(C)
      • K(e);S_FLIGHT::S(A)
      • K(e);P-FLIGHT::R(C)
      • K(e);S_FLIGHT,XS(D)::QAB(B)+R(C),DCHECK
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