MESON Chess Problem Database

Problem Display
PID: 180485 (8/8/8/p7/Pp6/1K1NN3/RP1k1P2/1n3B2 w - - 0 1)

Lider, Valentin Viktorovich

Europe Echecs, 1987

8/8/8/p7/Pp6/1K1NN3/RP1k1P2/1n3B2

#2

8 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sa3
      • 2.bxa3#
    • 1...Sc3
      • 2.bxc3#
  • Tries
    • 1.Kc4?
      • threat
        • 2.b3#
      • 1...Sa3+
        • 2.bxa3#
      • 1...Sc3
        • 2.bxc3#
      • 1...b3!
    • 1.Be2?
      • 1...Sa3
        • 2.bxa3#
      • 1...Sc3
        • 2.bxc3#
      • 1...Kxe2!
  • Keys
    • 1.Ra1!
      • 1...Sa3
        • 2.Rd1#
      • 1...Sc3
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(a);OGATE::R(B)+P(C),XS(a)
  • Tries
    • Try
      • K(E);S_FLIGHT
      • Threat
        • R(B)+P(C)
      • Vars
        • S(a);CHECK,OGATE::R(B)+P(C),XS(a)
        • S(a);OGATE::R(B)+P(C),XS(a)
      • Refutation
        • P(c);
    • Try
      • B(A);
      • Vars
        • S(a);OGATE::R(B)+P(C),XS(a)
      • Refutation
        • K(b);P-FLIGHT,XB(A)
  • Actual
    • R(B);
    • Vars
      • S(a);OGATE::R1(B)
      • S(a);::S(G)
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