MESON Chess Problem Database

Problem Display
PID: 61181 (3R4/4B3/8/1NR5/pk6/8/8/1K6 w - - 0 1)

Shavirin, Valery Mikhailovich

HM., Uralski Problemist, 2001

3R4/4B3/8/1NR5/pk6/8/8/1K6

#2

5 + 2

4393 Uralski Problemist 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Kb3
      • 2.Rc3#
  • Tries
    • 1.Sa3?
      • 1...Kxa3
        • 2.Rc3#
        • 2.Rb5#
      • 1...Kb3!
    • 1.Sc3?
      • 1...Ka3
        • 2.Rb5#
      • 1...a3
        • 2.Rb8#
      • 1...Kb3!
    • 1.Sd4?
      • 1...Ka3
        • 2.Rc1#
        • 2.Rc2#
        • 2.Rc3#
        • 2.Rc4#
        • 2.Ra5#
        • 2.Rb5#
        • 2.Rcd5#
        • 2.Re5#
        • 2.Rf5#
        • 2.Rg5#
        • 2.Rh5#
        • 2.Rc6#
        • 2.Rc7#
        • 2.Rcc8#
      • 1...a3!
    • 1.Rd4+?
      • 1...Kb3
        • 2.Rc3#
      • 1...Ka5!
    • 1.Ra8?
      • 1...Kb3
        • 2.Rc3#
      • 1...a3!
  • Keys
    • 1.Rb8!
      • 1...Kb3
        • 2.Rc3#
      • 1...Ka5
        • 2.Sc7#
      • 1...a3
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::R1(C)
  • Tries
    • Try
      • S(B);
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(B);
      • Vars
        • K(b);S_FLIGHT::B(D)+R(C)
        • P(a);SBLOCK::R(E)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(B);
      • Refutation
        • P(a);
    • Try
      • R(E);CHECK
      • Vars
        • K(b);P-FLIGHT::R1(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(E);
      • Vars
        • K(b);P-FLIGHT::R1(C)
      • Refutation
        • P(a);
  • Actual
    • R(E);
    • Vars
      • K(b);P-FLIGHT::R1(C)
      • K(b);S_FLIGHT::R(C)+S(B)
      • P(a);SBLOCK::R(E)+S(B)
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