MESON Chess Problem Database

Problem Display
PID: 132523 (6r1/p7/kP6/8/1K2Q3/4B3/8/8 w - - 0 1)

Aliovsadzade, Rauf Gadzhiaga ogli

2nd HM., Kozhakin-50 JT, 2007

6r1/p7/kP6/8/1K2Q3/4B3/8/8

#2

4 + 3

145 StrateGems 2008
5454 Near Snap 2009
15148 Sadier Collection 2015

SOLUTION

  • SOUND
  • Tries
    • 1.Qc6?
      • threat
        • 2.bxa7#
        • 2.b7#
      • 1...axb6
        • 2.Qxb6#
      • 1...Rg6
        • 2.Qc8#
      • 1...Rb8
        • 2.b7#
      • 1...Rc8
        • 2.Qxc8#
      • 1...Rg4+!
    • 1.bxa7?
      • threat
        • 2.Qc6#
      • 1...Rb8+
        • 2.axb8S#
      • 1...Rg4
        • 2.a8Q#
        • 2.a8R#
      • 1...Rg6
        • 2.a8Q#
        • 2.a8R#
      • 1...Rc8!
  • Keys
    • 1.b7!
      • threat
        • 2.Qc6#
      • 1...Rg4
        • 2.b8S#
      • 1...Rg6
        • 2.b8S#
      • 1...Rc8
        • 2.bxc8Q#
        • 2.bxc8B#

Anticipated by 15210(1981)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);OGATE,P_SPINP(b),XP(D)::QAR1(C),XP(b)
        • R(c);N_GUARD::QAB(C)
        • R(c);P_PINP(D)::QAR(C)+P(D)
        • R(c);N_GUARD::QAB(C),XR(c)
      • Refutation
        • R(c);CHECK
    • Try
      • P(D);XP(b)
      • Threat
        • QAR2(C)
      • Vars
        • R(c);CHECK,OGATE::PXR(c)=S
        • R(c);N_GUARD,P_PINQ(C)::P=Q
        • R(c);N_GUARD::P=Q
      • Refutation
        • R(c);
  • Actual
    • P(D);
    • Threat
      • QAR2(C)
    • Vars
      • R(c);N_GUARD,P_PINQ(C)::P=S
      • R(c);N_GUARD::P=S
      • R(c);OGATE::PXR(c)=Q
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