MESON Chess Problem Database

Problem Display
PID: 182262 (5K2/2b1N3/4p3/4k2n/2Q4B/5p2/8/8 w - - 0 1)

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

Schweizerische Schachzeitung, 1906

5K2/2b1N3/4p3/4k2n/2Q4B/5p2/8/8

#2

4 + 5

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Qd4#
    • 1...Sf6
      • 2.Bg3#
  • Tries
    • 1.Bg3+?
      • 1...Kf6
        • 2.Qh4#
      • 1...Sf4
        • 2.Qxf4#
      • 1...Sxg3!
    • 1.Qd5+?
      • 1...Kf4
        • 2.Qd4#
      • 1...exd5!
    • 1.Qc3+?
      • 1...Kf4
        • 2.Qd4#
      • 1...Kd6
        • 2.Qd4#
      • 1...Ke4!
    • 1.Qe4+?
      • 1...Kd6
        • 2.Qd4#
      • 1...Kxe4!
    • 1.Qc5+?
      • 1...Kf4
        • 2.Qd4#
      • 1...Ke4!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Sg6#
      • 1...Kf4
        • 2.Qd4#
      • 1...Bd6
        • 2.Qe3#
      • 1...Sf4
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • K(b);S_FLIGHT::QAR2(A)
    • S(c);N_GUARD,SBLOCK::B(B)
  • Tries
    • Try
      • B(B);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB(A)
        • S(c);N_GUARD,P_SPINS(c)::QAB1(A),XS(c)
      • Refutation
        • S(c);XB(B)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR2(A)
      • Refutation
        • P(d);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR2(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR2(A)
      • Refutation
        • K(b);P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR2(A)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • S(C)
    • Vars
      • K(b);S_FLIGHT::QAR2(A)
      • B(e);P_PINS(C),SBLOCK::QAR2(A)
      • S(c);SBLOCK::S(C)
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