MESON Chess Problem Database

Problem Display
PID: 23548 (5N2/4B3/8/4kp2/8/3KN1R1/8/8 w - - 0 1)

Ivanovsky, Nikolai Aleksandrovich

Mat, 1969

5N2/4B3/8/4kp2/8/3KN1R1/8/8

#2

5 + 2

2786 More Fun with Chess Miniatures 2000
5454 Near Snap 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Bd6#
    • 1...f4
      • 2.Rg5#
  • Tries
    • 1.Sd1?
      • 1...Kf4
        • 2.Bd6#
      • 1...f4
        • 2.Rg5#
      • 1...Kd5!
    • 1.Sf1?
      • 1...Kf4
        • 2.Sg6#
        • 2.Bd6#
      • 1...f4
        • 2.Rg5#
      • 1...Kd5!
    • 1.Sc2?
      • 1...Kf4
        • 2.Bd6#
      • 1...f4
        • 2.Rg5#
      • 1...Kd5!
    • 1.Sg2?
      • 1...f4
        • 2.Rg5#
      • 1...Kd5!
    • 1.Sc4+?
      • 1...Kf4
        • 2.Bd6#
      • 1...Kd5!
    • 1.Sd5?
      • 1...f4
        • 2.Rg5#
      • 1...Kxd5!
    • 1.Sd7+?
      • 1...Kf4
        • 2.Bd6#
      • 1...Ke6!
    • 1.Rg1?
      • 1...f4
        • 2.Rg5#
      • 1...Kf4!
    • 1.Rg2?
      • 1...f4
        • 2.Rg5#
      • 1...Kf4!
    • 1.Rg4?
      • 1...f4
        • 2.Rg5#
      • 1...fxg4!
    • 1.Rg7?
      • 1...f4
        • 2.Rg5#
      • 1...Kf4!
    • 1.Rg8?
      • 1...f4
        • 2.Rg5#
      • 1...Kf4!
  • Keys
    • 1.Rh3!
      • 1...Kf4
        • 2.Sg6#
      • 1...f4
        • 2.Rh5#

Anticipated by 6541(1931)

This anticipates 212384(1986)

FEATURES

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