MESON Chess Problem Database

Problem Display
PID: 271693 (8/1B6/8/B7/6Q1/8/1K3P1p/5k1r w - - 0 1)

Nagovitsin, Eduard Nikolaevich

Shakhmatnaya kompozitsiya, 2023

8/1B6/8/B7/6Q1/8/1K3P1p/5k1r

#2

5 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Bd2?
      • 1...Kxf2
        • 2.Qg2#
      • 1...Rg1!
    • 1.Qe2+?
      • 1...Kg1
        • 2.Qe1#
      • 1...Kxe2!
    • 1.Qe6?
      • threat
        • 2.Qe1#
      • 1...Kg1
        • 2.Qe1#
      • 1...Kxf2!
    • 1.Qe4?
      • threat
        • 2.Qe1#
      • 1...Kg1
        • 2.Qg2#
        • 2.Qe1#
      • 1...Kxf2!
    • 1.f4?
      • threat
        • 2.Qg2#
      • 1...Rg1
        • 2.Qf3#
      • 1...Kf2!
  • Keys
    • 1.Qf3!
      • 1...Kg1
        • 2.Qg2#
      • 1...Rg1
        • 2.Ba6#

FEATURES

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