MESON Chess Problem Database

Problem Display
PID: 10768 (8/1K6/6p1/8/1RNk4/8/5RQ1/8 w - - 0 1)

Kosolapov, Nikolai

64 Shakhmatnoe obozrenie, 1968

8/1K6/6p1/8/1RNk4/8/5RQ1/8

#2

5 + 2

3296 Shakhmatny zadachi miniaturi 1987
3813 300 Sachmatu Uzdaviniu 1991

SOLUTION

  • SOUND
  • Tries
    • 1.Rf4+?
      • 1...Kc3
        • 2.Qd2#
      • 1...Kd3
        • 2.Rb3#
        • 2.Qd2#
      • 1...Kc5!
    • 1.Qd5+?
      • 1...Kc3
        • 2.Qd2#
      • 1...Kxd5!
    • 1.Qg3?
      • 1...Ke4
        • 2.Sb6#
      • 1...Kc5
        • 2.Qd6#
      • 1...Kd5
        • 2.Qe5#
      • 1...g5!
  • Keys
    • 1.Qg5!
      • 1...Kc3
        • 2.Qd2#
      • 1...Kd3
        • 2.Qe3#
      • 1...Ke4
        • 2.Sb2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT,XQ(B)
    • Try
      • Q(B);
      • Vars
        • K(a);P-FLIGHT::R(C)+S(D)
        • K(a);S_FLIGHT::QAB1(B)
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • P(b);
  • Actual
    • Q(B);
    • Vars
      • K(a);S_FLIGHT::QAB1(B)
      • K(a);P-FLIGHT::QAR1(B)
      • K(a);P-FLIGHT::R(C)+S(D)
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