MESON Chess Problem Database

Problem Display
PID: 202574 (1N6/1N6/1pp5/1k6/5R2/8/1KB1P3/2nb4 w - - 0 1)

Kotov, VI

Krasny Sever, 1923

1N6/1N6/1pp5/1k6/5R2/8/1KB1P3/2nb4

#2

6 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe2
      • 2.Ba4#
    • 1...Sa2
      • 2.Bd3#
    • 1...Sxe2
      • 2.Bd3#
    • 1...Sb3
      • 2.Bd3#
    • 1...Sd3+
      • 2.Bxd3#
  • Tries
    • 1.Ka3?
      • threat
        • 2.Rb4#
      • 1...Sa2
        • 2.Bd3#
      • 1...Sd3
        • 2.Bxd3#
      • 1...c5!
    • 1.Sd6+?
      • 1...Ka5
        • 2.Ra4#
      • 1...Kc5!
  • Keys
    • 1.Be4!
      • threat
        • 2.Bxc6#
      • 1...Sd3+
        • 2.Bxd3#
      • 1...Ka4
        • 2.Bd3#
        • 2.Bxc6#
      • 1...Kb4
        • 2.Bd3#
        • 2.Bxc6#
      • 1...Kc4
        • 2.Bxc6#
      • 1...c5
        • 2.Bc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • B(b);N_GUARD,XP(C)::B(B)
    • S(a);N_GUARD::B(B)
    • S(a);N_GUARD,XP(C)::B(B)
    • S(a);CHECK,N_GUARD::B(B),XS(a)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Threat
        • R1(D)
      • Vars
        • S(a);N_GUARD::B(B)
        • S(a);N_GUARD::B(B),XS(a)
      • Refutation
        • P(e);
    • Try
      • S(E);CHECK
      • Vars
        • K(c);P-FLIGHT::R1(D)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • B(B);
    • Threat
      • B(B),XP(e)
    • Vars
      • S(a);CHECK,N_GUARD::B(B),XS(a)
      • K(c);S_FLIGHT::R(D)+B(B),XP(e)
      • P(e);::B(B)
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