MESON Chess Problem Database

Problem Display
PID: 268836 (2Q5/8/7R/B7/5k2/5P2/6P1/K7 w - - 0 1)

Nichtawitz, Alois

Troll, 2022

(First published on Wed May 25 2022)

2Q5/8/7R/B7/5k2/5P2/6P1/K7

#2

6 + 1

5454 Near Snap 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Kg5
      • 2.Bd2#
  • Tries
    • 1.Bd2+?
      • 1...Ke5
        • 2.Qc5#
      • 1...Kg3!
    • 1.Bb6?
      • 1...Kg3
        • 2.Qg4#
      • 1...Kg5
        • 2.Be3#
      • 1...Ke5!
    • 1.Qg4+?
      • 1...Ke5
        • 2.Qe4#
      • 1...Ke3!
    • 1.Qe6?
      • 1...Kg5
        • 2.Bd2#
        • 2.Qf6#
      • 1...Kg3!
    • 1.Qd7?
      • 1...Ke3
        • 2.Qd2#
      • 1...Ke5
        • 2.Bc7#
      • 1...Kg5
        • 2.Bd2#
      • 1...Kg3!
    • 1.Qc3?
      • 1...Kf5
        • 2.Qf6#
      • 1...Kg5
        • 2.Qf6#
      • 1...Kg3!
  • Keys
    • 1.Qc2!
      • 1...Ke3
        • 2.Qd2#
      • 1...Kg3
        • 2.Bc7#
      • 1...Ke5
        • 2.Qe4#
      • 1...Kg5
        • 2.Bd2#

Anticipated by 262909(2008), 266069(2017)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);N_GUARD,S_FLIGHT::B(D)
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAR2(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(D);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAR1(F)
        • K(a);N_GUARD,S_FLIGHT::B(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAB1(F)
        • K(a);N_GUARD,S_FLIGHT::B(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);
      • Vars
        • K(a);N_GUARD,P-FLIGHT::QAR1(F)
        • K(a);N_GUARD,S_FLIGHT::QAB1(F)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(F);
    • Vars
      • K(a);N_GUARD,S_FLIGHT::QAB1(F)
      • K(a);N_GUARD,S_FLIGHT::B(D)
      • K(a);N_GUARD,S_FLIGHT::QAR1(F)
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