MESON Chess Problem Database

Problem Display
PID: 117051 (1qk5/P2R4/P1K5/2N5/8/8/8/8 w - - 0 1)

Kozhakin, Vladimir Vladimirovich

Saks, Oleg Pavlovich

Chepizhni-60 JT (Kudesnik), 1994

1qk5/P2R4/P1K5/2N5/8/8/8/8

#2

5 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qb7+
      • 2.axb7#
  • Tries
    • 1.Rc7+?
      • 1...Kd8
        • 2.axb8Q#
        • 2.axb8R#
      • 1...Qxc7+!
  • Keys
    • 1.Sb7!
      • threat
        • 2.Rd8#
      • 1...Qd6+
        • 2.Sxd6#
      • 1...Qc7+
        • 2.Rxc7#
      • 1...Qxb7+
        • 2.axb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(a);CHECK,OGATE::P(B),XQ(a)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(b);P-FLIGHT::PXQ(a)=Q
      • Refutation
        • Q(a);CHECK,XR(E)
  • Actual
    • S(A);
    • Threat
      • R1(E)
    • Vars
      • Q(a);CHECK,N_GUARD::S(A),XQ(a)
      • Q(a);CHECK,N_GUARD::R1(E),XQ(a)
      • Q(a);CHECK,OGATE,XS(A)::P(B),XQ(a)
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