MESON Chess Problem Database

Problem Display
PID: 189469 (8/6p1/3B4/3p1P2/1P1k4/1n4N1/1N3P2/Q2K4 w - - 0 1)

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

5th Prize, Pravo lidu, 1911

8/6p1/3B4/3p1P2/1P1k4/1n4N1/1N3P2/Q2K4

#2

8 + 4

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Kc3
      • 2.Se2#
  • Tries
    • 1.Bc5+?
      • 1...Kc3
        • 2.Se2#
      • 1...Ke5
        • 2.Sd3#
      • 1...Sxc5!
    • 1.Qb1?
      • threat
        • 2.Se2#
        • 2.Qd3#
      • 1...Kc3
        • 2.Se2#
      • 1...Sc5
        • 2.Se2#
      • 1...Sc1!
    • 1.Qc1?
      • threat
        • 2.Qe3#
      • 1...Sd2
        • 2.Qxd2#
        • 2.Qc5#
      • 1...Sxc1!
    • 1.Qa7+?
      • 1...Sc5
        • 2.Qxc5#
        • 2.Qxg7#
      • 1...Kc3!
  • Keys
    • 1.Bf8!
      • threat
        • 2.Bxg7#
      • 1...Kc3
        • 2.Se2#
      • 1...Ke5
        • 2.Sd3#
      • 1...g5
        • 2.Bg7#
      • 1...g6
        • 2.Bg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::S(E)
  • Tries
    • Try
      • B(H);CHECK
      • Vars
        • K(b);S_FLIGHT::S(E)
        • K(b);S_FLIGHT::QAB(A)+S(C),DCHECK
      • Refutation
        • S(a);XB(H)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);S_FLIGHT::S(E)
        • S(a);::S(E)
      • Refutation
        • S(a);
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • B(H);
    • Threat
      • B(H),XP(d)
    • Vars
      • K(b);S_FLIGHT::S(E)
      • K(b);S_FLIGHT::QAB(A)+S(C),DCHECK
      • P(d);::B(H)
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