MESON Chess Problem Database

Problem Display
PID: 266747 (5R2/1N6/2Q5/3p4/3k2N1/8/8/5K2 w - - 0 1)

Shmatov, Vladimir Afanasievich

Zadachi i Etyudi, 2011

5R2/1N6/2Q5/3p4/3k2N1/8/8/5K2

#2

5 + 2

5454 Near Snap 2023

SOLUTION

  • SOUND
  • Tries
    • 1.Rf5?
      • 1...Ke4
        • 2.Qxd5#
      • 1...Kd3!
    • 1.Rc8?
      • 1...Kd3
        • 2.Qxd5#
      • 1...Ke4!
    • 1.Qc1?
      • 1...Ke4
        • 2.Qe3#
      • 1...Kd3!
    • 1.Qc3+?
      • 1...Ke4
        • 2.Sf2#
        • 2.Sc5#
        • 2.Sd6#
        • 2.Qe3#
      • 1...Kxc3!
    • 1.Qc5+?
      • 1...Ke4
        • 2.Qe3#
      • 1...Kd3!
  • Keys
    • 1.Sf2!
      • 1...Ke3
        • 2.Qc3#
      • 1...Ke5
        • 2.Qf6#

This anticipates 267462(2013)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(E);
      • Vars
        • K(a);N_GUARD,P-FLIGHT,P_SPINP(b)::QAB1(C),XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(E);
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAR2(C),XP(b)
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
    • Try
      • Q(C);
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Refutation
        • K(a);S_FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(B);
    • Vars
      • K(a);N_GUARD,S_FLIGHT::QAR2(C)
      • K(a);N_GUARD,S_FLIGHT::QAB1(C)
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