MESON Chess Problem Database

Problem Display
PID: 103549 (8/8/8/3Q4/3p4/2NkN3/8/3K4 w - - 0 1)

Grassano, Carlos A

Kudesnik, 2006

8/8/8/3Q4/3p4/2NkN3/8/3K4

#2

4 + 2

5454 Near Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Kc1?
      • 1...Kxc3
        • 2.Qc4#
      • 1...Kxe3!
    • 1.Ke1?
      • 1...Kxe3
        • 2.Qe4#
      • 1...Kxc3!
    • 1.Qb5+?
      • 1...Kxc3
        • 2.Sd5#
      • 1...Kxe3!
    • 1.Qf5+?
      • 1...Kxe3
        • 2.Sd5#
      • 1...Kxc3!
  • Keys
    • 1.Qd6!
      • 1...Kxc3
        • 2.Qa3#
      • 1...Kxe3
        • 2.Qg3#

Anticipated by 23002(1881), 222665(1884), 194199(1917), 169805(1945), 2154(1964), 109480(1986)

FEATURES

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