MESON Chess Problem Database

Problem Display
PID: 233383 (4B3/1N3p2/4k3/6Q1/8/5K2/8/8 w - - 0 1)

Benko, Pal Charles

Chess Life & Review, 1975

4B3/1N3p2/4k3/6Q1/8/5K2/8/8

#2

4 + 2

15148 Sadier Collection 2021
3713 Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qf6+?
      • 1...Kd5
        • 2.Bxf7#
      • 1...Kxf6!
    • 1.Qc5?
      • 1...f5
        • 2.Qd6#
      • 1...f6
        • 2.Sd8#
      • 1...Kf6!
    • 1.Qf5+?
      • 1...Ke7
        • 2.Qxf7#
      • 1...Kxf5!
  • Keys
    • 1.Qf4!
      • 1...Kd5
        • 2.Qe4#
      • 1...Ke7
        • 2.Qxf7#
      • 1...f5
        • 2.Qd6#
      • 1...f6
        • 2.Qe4#

Anticipated by 162049(1925)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);S_FLIGHT::B(D),XP(b)
      • Refutation
        • K(a);P-FLIGHT,XQ(B)
    • Try
      • Q(B);
      • Vars
        • P(b);SBLOCK::QAR1(B)
        • P(b);SBLOCK::S(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(B),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XQ(B)
  • Actual
    • Q(B);
    • Vars
      • K(a);S_FLIGHT::QAB1(B)
      • K(a);P-FLIGHT::QAR1(B),XP(b)
      • P(b);SBLOCK::QAR1(B)
      • P(b);SBLOCK::QAR2(B)
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