MESON Chess Problem Database

Problem Display
PID: 10621 (8/8/8/5K1k/8/8/R1Q5/4b3 w - - 0 1)

Zakhodyakin, Gleb Nikolaevich

Sp. Prize, Molodoi Leninets, 1966

8/8/8/5K1k/8/8/R1Q5/4b3

#2

3 + 2

3296 Shakhmatny zadachi miniaturi 1987
3813 300 Sachmatu Uzdaviniu 1991
3713 Snap 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kh4
      • 2.Qh2#
    • 1...Bc3
      • 2.Qh2#
    • 1...Bb4
      • 2.Qh2#
    • 1...Ba5
      • 2.Qh2#
  • Tries
    • 1.Qd1+?
      • 1...Kh4
        • 2.Qg4#
      • 1...Kh6!
    • 1.Qb2?
      • threat
        • 2.Qh8#
      • 1...Kh4
        • 2.Qh2#
      • 1...Kh6
        • 2.Qh8#
      • 1...Bc3
        • 2.Qh2#
      • 1...Bd2!
    • 1.Qe2+?
      • 1...Kh4
        • 2.Qg4#
        • 2.Qh2#
      • 1...Kh6!
    • 1.Qg2?
      • threat
        • 2.Qg5#
      • 1...Kh4
        • 2.Qh2#
        • 2.Qg4#
      • 1...Kh6
        • 2.Qg6#
      • 1...Bd2
        • 2.Qh1#
        • 2.Qh3#
        • 2.Qh2#
      • 1...Bh4
        • 2.Qg6#
      • 1...Bg3!
    • 1.Qc7?
      • threat
        • 2.Qh7#
      • 1...Kh4
        • 2.Rh2#
        • 2.Qh2#
      • 1...Bd2
        • 2.Qh2#
      • 1...Kh6!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qh8#
      • 1...Kh4
        • 2.Rh2#
      • 1...Kh6
        • 2.Qh8#
      • 1...Bxc3
        • 2.Rh2#
      • 1...Bd2
        • 2.Qh3#

Anticipated by 125418(0000)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • K(b);P-FLIGHT::QAR2(B)
    • B(a);N_GUARD::QAR(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • K(b);P-FLIGHT::QAR2(B)
        • B(a);N_GUARD::QAR(B)
      • Refutation
        • B(a);
    • Try
      • Q(B);CHECK
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
        • B(a);SBLOCK::QAB1(B)
      • Refutation
        • B(a);
    • Try
      • Q(B);
      • Threat
        • QAR2(B)
      • Vars
        • B(a);N_GUARD::QAR(B)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(B);
    • Threat
      • QAR(B)
    • Vars
      • K(b);P-FLIGHT::R(A)
      • K(b);P-FLIGHT::QAR2(B)
      • B(a);N_GUARD,XQ(B)::R(A)
      • B(a);N_GUARD::QAR2(B)
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