MESON Chess Problem Database

Problem Display
PID: 77518 (8/8/4Q3/3p4/2NkN3/8/2K5/8 w - - 0 1)

Zvetkov, Javor

Shakhmatna misl, 1984

8/8/4Q3/3p4/2NkN3/8/2K5/8

#2

4 + 2

15148 Sadier Collection 2014
5454 Near Snap 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Sed2?
      • threat
        • 2.Qe3#
        • 2.Qb6#
      • 1...Kc5
        • 2.Qb6#
      • 1...dxc4!
    • 1.Qb6+?
      • 1...Kxc4
        • 2.Sd2#
        • 2.Sd6#
        • 2.Qc5#
      • 1...Kxe4!
    • 1.Qd6?
      • 1...Kxc4
        • 2.Qc5#
      • 1...Kxe4!
  • Keys
    • 1.Qd7!
      • 1...Kxc4
        • 2.Qa4#
      • 1...Kxe4
        • 2.Qg4#

Anticipated by 223095(1885), 107897(1897), 255115(1932)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);S_FLIGHT::QAB1(D)
      • Refutation
        • P(b);XS(B)
    • Try
      • Q(D);CHECK
      • Refutation
        • K(a);P-FLIGHT,XS(C)
    • Try
      • Q(D);P_PINP(b)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT,XS(B)::QAR1(D)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT,XS(C)
  • Actual
    • Q(D);P_PINP(b)
    • Vars
      • K(a);N_SPINP(b),OGATEB,P-FLIGHT,XS(B)::QAR2(D)
      • K(a);N_SPINP(b),OGATEB,P-FLIGHT,XS(C)::QAR2(D)
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