MESON Chess Problem Database

Problem Display
PID: 270906 (8/6p1/6Kb/6p1/6Q1/8/1pNBP3/1b1k1N2 w - - 0 1)

Bonner Feast, Frederick

Sunday Referee, 1932

(First published on Sun Jul 31 1932)

8/6p1/6Kb/6p1/6Q1/8/1pNBP3/1b1k1N2

#2

6 + 6

3713 Snap 2023
15239 Valois Notebooks 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc2
      • 2.Qa4#
    • 1...Ba2
      • 2.Sce3#
    • 1...Bxc2+
      • 2.e4#
  • Tries
    • 1.Kf5?
      • 1...Bxc2+
        • 2.e4#
      • 1...Kxc2
        • 2.Qa4#
      • 1...Ba2
        • 2.Sce3#
      • 1...g6+!
    • 1.Kh5?
      • threat
        • 2.Sce3#
      • 1...Kxc2
        • 2.Qa4#
      • 1...Bxc2
        • 2.e3#
        • 2.e4#
      • 1...g6+!
    • 1.Kf7?
      • threat
        • 2.Sce3#
      • 1...Kxc2
        • 2.Qa4#
      • 1...Bxc2
        • 2.e3#
        • 2.e4#
      • 1...Ba2+!
  • Keys
    • 1.Kh7!
      • 1...Bxc2+
        • 2.e4#
      • 1...Kxc2
        • 2.Qa4#
      • 1...Ba2
        • 2.Sce3#
      • 1...g6
        • 2.Sce3#

Anticipated by 20893(1913)

This is after

After J. Kohtz, 1885.

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);OGATEB,S_FLIGHT,XS(B)::QAB(E)
    • B(a);N_PINS(B)::S(B)
    • B(a);CHECK,SBLOCK,XS(B)::QAB(E)+P(D)
  • Tries
    • Try
      • K(F);S_FLIGHT
      • Vars
        • B(a);CHECK,SBLOCK,XS(B)::QAB(E)+P(D)
        • K(b);OGATEB,S_FLIGHT,XS(B)::QAB(E)
        • B(a);N_PINS(B)::S(B)
      • Refutation
        • P(f);CHECK
    • Try
      • K(F);N_SPINS(B),S_FLIGHT
      • Threat
        • S(B)
      • Vars
        • K(b);OGATEB,S_FLIGHT,XS(B)::QAB(E)
      • Refutation
        • P(f);CHECK
    • Try
      • K(F);N_SPINS(B),S_FLIGHT
      • Threat
        • S(B)
      • Vars
        • K(b);OGATEB,S_FLIGHT,XS(B)::QAB(E)
      • Refutation
        • B(a);CHECK
  • Actual
    • K(F);S_FLIGHT
    • Vars
      • B(a);CHECK,SBLOCK,XS(B)::QAB(E)+P(D)
      • K(b);OGATEB,S_FLIGHT,XS(B)::QAB(E)
      • B(a);N_PINS(B)::S(B)
      • P(f);N_PINS(B)::S(B)
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