MESON Chess Problem Database

Problem Display
PID: 172448 (2nk4/4n1R1/B1Q5/2K5/8/8/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1997

2nk4/4n1R1/B1Q5/2K5/8/8/8/8

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sd5
      • 2.Qd7#
      • 2.Qxc8#
    • 1...Sf5
      • 2.Qd7#
      • 2.Qxc8#
    • 1...Sg6
      • 2.Qd7#
      • 2.Qxc8#
    • 1...Sg8
      • 2.Qd7#
      • 2.Qxc8#
  • Tries
    • 1.Qb7?
      • 1...Sb6
        • 2.Qxe7#
      • 1...Sd5
        • 2.Rg8#
        • 2.Qxc8#
        • 2.Qd7#
      • 1...Sf5
        • 2.Rg8#
        • 2.Qxc8#
        • 2.Qd7#
      • 1...Sc6
        • 2.Rg8#
        • 2.Qxc8#
        • 2.Qd7#
      • 1...Sg6
        • 2.Qxc8#
        • 2.Qd7#
      • 1...Sg8
        • 2.Rxg8#
        • 2.Qxc8#
        • 2.Qd7#
      • 1...Sd6
        • 2.Qxe7#
      • 1...Sa7
        • 2.Qxe7#
      • 1...Ke8!
    • 1.Qa8?
      • 1...Kc7
        • 2.Qxc8#
      • 1...Kd7
        • 2.Qxc8#
      • 1...Sd5
        • 2.Qxc8#
      • 1...Sf5
        • 2.Qxc8#
      • 1...Sc6
        • 2.Qxc8#
      • 1...Sg6
        • 2.Qxc8#
      • 1...Sg8
        • 2.Qxc8#
      • 1...Ke8!
    • 1.Qe8+?
      • 1...Kc7
        • 2.Qxc8#
      • 1...Kxe8!
  • Keys
    • 1.Qe6!
      • 1...Kc7
        • 2.Qxc8#
      • 1...Ke8
        • 2.Rg8#
      • 1...Sb6
        • 2.Qxe7#
      • 1...Sd5
        • 2.Rd7#
        • 2.Qd7#
        • 2.Qxc8#
        • 2.Qg8#
      • 1...Sf5
        • 2.Rd7#
        • 2.Qd7#
        • 2.Qxc8#
        • 2.Qg8#
      • 1...Sc6
        • 2.Rd7#
        • 2.Qd7#
        • 2.Qxc8#
        • 2.Qg8#
      • 1...Sg6
        • 2.Rd7#
        • 2.Qd7#
        • 2.Qxc8#
      • 1...Sg8
        • 2.Rd7#
        • 2.Qd7#
        • 2.Qxc8#
        • 2.Qxg8#
      • 1...Sd6
        • 2.Qxe7#
      • 1...Sa7
        • 2.Qxe7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);
      • Vars
        • S(b);N_GUARD::QAB1(C),XS(a)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(C);P_PINS(b)
      • Vars
        • K(c);N_SPINS(b),P_SPINS(a),S_FLIGHT::QAR1(C),XS(b)
        • K(c);N_SPINS(b),P-FLIGHT,P_SPINS(a)::QAB1(C),XS(b)
        • S(a);N_GUARD::QAR1(C),XS(b)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);OGATE,P_SPINS(a),S_FLIGHT::QAR1(C),XS(b)
      • Refutation
        • K(c);P-FLIGHT,XQ(C)
  • Actual
    • Q(C);
    • Vars
      • K(c);P_SPINS(a),S_FLIGHT::QAR1(C),XS(b)
      • K(c);P-FLIGHT,P_SPINS(a)::R(D)
      • S(b);N_GUARD::QAB1(C),XS(a)
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