MESON Chess Problem Database

Problem Display
PID: 262833 (3B4/2K5/6Q1/8/3N4/3P4/1RBkPR2/8 w - - 0 1)

Belchikov, Nikolai Ivanovich

Petrusenko, Alexey Matveevich

Comm., Szachy, 1976

3B4/2K5/6Q1/8/3N4/3P4/1RBkPR2/8

#2

9 + 1

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Sb3+?
      • 1...Ke1
        • 2.Qg1#
      • 1...Ke3
        • 2.Qg3#
        • 2.Qb6#
      • 1...Kc3!
    • 1.Qf6?
      • 1...Kc1
        • 2.Sb3#
      • 1...Kc3
        • 2.Sf3#
      • 1...Ke3
        • 2.Qf4#
      • 1...Ke1!
    • 1.e3+?
      • 1...Kc1
        • 2.Rb1#
      • 1...Ke1
        • 2.Qg1#
      • 1...Kc3
        • 2.Rb3#
      • 1...Kxe3!
  • Keys
    • 1.Qb6!
      • 1...Kc1
        • 2.Bg5#
      • 1...Ke1
        • 2.Sf3#
      • 1...Kc3
        • 2.Qb4#
      • 1...Ke3
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAR2(G)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(G);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::S(F)
        • K(a);N_GUARD,S_FLIGHT::QAB(G)+S(F)
        • K(a);N_GUARD,S_FLIGHT::QAB1(G)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(C);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::R1(A)
        • K(a);N_GUARD,S_FLIGHT::QAR2(G)
      • Refutation
        • K(a);S_FLIGHT,XP(C)
  • Actual
    • Q(G);
    • Vars
      • K(a);N_GUARD,S_FLIGHT::B(I)
      • K(a);N_GUARD,S_FLIGHT::S(F)
      • K(a);N_GUARD,S_FLIGHT::QAB1(G)
      • K(a);N_GUARD,S_FLIGHT::QAB(G)+S(F)
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