MESON Chess Problem Database

Problem Display
PID: 227722 (8/4Kp1B/6p1/5k2/4R1R1/8/8/8 w - - 0 1)

Sonnenfeld, Pal

Nepszava, 1926

8/4Kp1B/6p1/5k2/4R1R1/8/8/8

#2

4 + 3

6490 yacpdb 2020
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...f6
      • 2.Bxg6#
  • Tries
    • 1.Kd7?
      • 1...f6
        • 2.Bxg6#
      • 1...Kf6!
    • 1.Kd8?
      • 1...f6
        • 2.Bxg6#
      • 1...Kf6!
    • 1.Ke8?
      • 1...f6
        • 2.Bxg6#
      • 1...Kf6!
    • 1.Kf8?
      • 1...f6
        • 2.Bxg6#
      • 1...Kf6!
    • 1.Ra4?
      • 1...Ke5
        • 2.Ra5#
      • 1...f6!
    • 1.Rb4?
      • 1...Ke5
        • 2.Rb5#
      • 1...f6!
    • 1.Rc4?
      • 1...Ke5
        • 2.Rc5#
      • 1...f6!
    • 1.Rg1?
      • 1...f6
        • 2.Bxg6#
      • 1...Kxe4!
    • 1.Rg2?
      • 1...f6
        • 2.Bxg6#
      • 1...Kxe4!
    • 1.Rg3?
      • 1...f6
        • 2.Bxg6#
      • 1...Kxe4!
  • Keys
    • 1.Bg8!
      • 1...g5
        • 2.Bh7#
      • 1...f6
        • 2.Be6#

Anticipated by 203226(1924)

This anticipates 108200(1954)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(c);N_GUARD::B(D),XP(b)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • P(c);N_GUARD,SBLOCK::B(D),XP(b)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • K(C);S_FLIGHT
      • Vars
        • P(c);N_GUARD,SBLOCK::B(D),XP(b)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • K(C);P-FLIGHT
      • Vars
        • P(c);N_GUARD,SBLOCK::B(D),XP(b)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • K(C);S_FLIGHT
      • Vars
        • P(c);N_GUARD,SBLOCK::B(D),XP(b)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
    • Try
      • R(A);
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::R(A)
      • Refutation
        • P(c);
    • Try
      • R(A);
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::R(A)
      • Refutation
        • P(c);
    • Try
      • R(A);
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::R(A)
      • Refutation
        • P(c);
    • Try
      • R(B);
      • Vars
        • P(c);N_GUARD::B(D),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XR(A)
    • Try
      • R(B);
      • Vars
        • P(c);N_GUARD::B(D),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XR(A)
    • Try
      • R(B);
      • Vars
        • P(c);N_GUARD::B(D),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XR(A)
  • Actual
    • B(D);N_PINP(b)
    • Vars
      • P(b);OGATEB::B(D)
      • P(c);OGATE::B(D)
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Developed and maintained by Brian Stephenson.
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