MESON Chess Problem Database

Problem Display
PID: 230402 (2n5/3b1P2/4k1K1/6B1/3R4/8/8/8 w - - 0 1)

Prahl, Gerd

Deutsche Schachzeitung, 1977

2n5/3b1P2/4k1K1/6B1/3R4/8/8/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.f8Q?
      • threat
        • 2.Qf5#
        • 2.Qf6#
      • 1...Se7+
        • 2.Qxe7#
      • 1...Ke5
        • 2.Qf6#
      • 1...Sd6
        • 2.Qxd6#
        • 2.Qe7#
        • 2.Qf6#
      • 1...Be8+!
  • Keys
    • 1.f8S+!
      • 1...Ke5
        • 2.Bf6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • P(D);
      • Threat
        • DUALS(2)
      • Vars
        • S(c);CHECK,N_GUARD::QAR1(D),XS(c)
        • K(a);P-FLIGHT::QAB1(D)
      • Refutation
        • B(b);CHECK
  • Actual
    • P(D);CHECK
    • Vars
      • K(a);P-FLIGHT::B(B)
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