MESON Chess Problem Database

Problem Display
PID: 267462 (8/1R6/4Q3/3p4/N2k4/8/8/1K6 w - - 0 1)

Shmatov, Vladimir Afanasievich

Zadachi i Etyudi, 2013

8/1R6/4Q3/3p4/N2k4/8/8/1K6

#2

4 + 2

5454 Near Snap 2023

SOLUTION

  • SOUND
  • Tries
    • 1.Rb5?
      • 1...Kc4
        • 2.Qxd5#
      • 1...Kd3!
    • 1.Re7?
      • 1...Kd3
        • 2.Qxd5#
      • 1...Kc4!
    • 1.Qe1?
      • 1...Kc4
        • 2.Qc3#
      • 1...Kd3!
    • 1.Qe3+?
      • 1...Kc4
        • 2.Sb2#
        • 2.Qc3#
      • 1...Kxe3!
  • Keys
    • 1.Sb2!
      • 1...Kc3
        • 2.Qe3#
      • 1...Kc5
        • 2.Qb6#

Anticipated by 266747(2011)

FEATURES

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