MESON Chess Problem Database

Problem Display
PID: 152969 (r2Q4/pP6/k7/8/2K5/8/8/4B3 w - - 0 1)

Alekseev, Yuri Mikhailovich

Kudesnik, 2003

r2Q4/pP6/k7/8/2K5/8/8/4B3

#2

4 + 3

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Rc8+
      • 2.bxc8Q#
      • 2.bxc8B#
  • Tries
    • 1.Qb6+?
      • 1...axb6
        • 2.bxa8Q#
      • 1...Kxb6!
    • 1.Qc8?
      • threat
        • 2.Qc6#
        • 2.bxa8S#
        • 2.b8Q#
        • 2.b8R#
      • 1...Kb6
        • 2.bxa8S#
      • 1...Rb8
        • 2.Qc6#
      • 1...Rxc8+!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Qc6#
      • 1...Rc8
        • 2.bxc8Q#
        • 2.bxc8B#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • R(c);CHECK,OGATE::PXR(c)=Q
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • P(b);SBLOCK,XQ(D)::PXR(c)=Q
      • Refutation
        • K(a);P-FLIGHT,XQ(D)
    • Try
      • Q(D);
      • Threat
        • DUALS(4)
      • Vars
        • K(a);P-FLIGHT::PXR(c)=S
        • R(c);::QAR2(D)
      • Refutation
        • R(c);CHECK,XQ(D)
  • Actual
    • Q(D);
    • Threat
      • QAR2(D)
    • Vars
      • R(c);OGATE,P_PINQ(D)::PXR(c)=Q
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