MESON Chess Problem Database

Problem Display
PID: 109540 (8/8/1Q4PK/3Bk3/4P2p/4p1qP/3br1NB/6R1 w - - 0 1)

Tutsakov, Joza

Mezija, 1999

8/8/1Q4PK/3Bk3/4P2p/4p1qP/3br1NB/6R1

#2

9 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qf4+
      • 2.Bxf4#
  • Tries
    • 1.Rf1?
      • threat
        • 2.Rf5#
        • 2.Qf6#
      • 1...Qf4+
        • 2.Bxf4#
      • 1...Rf2!
    • 1.Qc7+?
      • 1...Kf6
        • 2.Qg7#
      • 1...Kd4!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Sd3#
      • 1...Qxf4+
        • 2.Rg5#
      • 1...Qg5+
        • 2.Rxg5#
      • 1...Qxg6+
        • 2.Sxg6#
      • 1...Kxf4
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(d);CHECK,OGATE::B(C),XQ(d)
  • Tries
    • Try
      • R(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(d);CHECK,OGATE::B(C),XQ(d)
      • Refutation
        • R(b);
    • Try
      • Q(G);CHECK
      • Vars
        • K(f);N_SPINQ(d),S_FLIGHT::QAB1(G)
      • Refutation
        • K(f);N_SPINQ(d),S_FLIGHT
  • Actual
    • S(B);N_PINQ(d)
    • Threat
      • S(B)
    • Vars
      • Q(d);CHECK,OGATE,P_SPINQ(d),XS(B)::R(A)
      • Q(d);CHECK,OGATE::R(A),XQ(d)
      • Q(d);CHECK,XP(H)::B(C)+S(B),DCHECK,XQ(d)
      • K(f);P_SPINQ(d),S_FLIGHT,XS(B)::QAR2(G)
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