MESON Chess Problem Database

Problem Display
PID: 88751 (8/8/8/6pQ/6N1/7K/7N/6bk w - - 0 1)

Lider, Valentin Viktorovich

Problemista, 1972

8/8/8/6pQ/6N1/7K/7N/6bk

#2

4 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Kg3?
      • 1...Bxh2+
        • 2.Qxh2#
      • 1...Be3
        • 2.Sf3#
      • 1...Bd4
        • 2.Sf3#
      • 1...Bc5
        • 2.Sf3#
      • 1...Bb6
        • 2.Sf3#
      • 1...Ba7
        • 2.Sf3#
      • 1...Bf2+!
  • Keys
    • 1.Sf3!
      • 1...Bf2
        • 2.Sxf2#
      • 1...Bh2
        • 2.Sf2#
      • 1...Be3
        • 2.Kg3#
      • 1...Bd4
        • 2.Kg3#
      • 1...Bc5
        • 2.Kg3#
      • 1...Bb6
        • 2.Kg3#
      • 1...Ba7
        • 2.Kg3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • B(a);CHECK,OGATE,P_SPINB(a),XS(A)::QAR1(D),XB(a)
        • B(a);N_GUARD::QAR(D)+S(A)
      • Refutation
        • B(a);CHECK
  • Actual
    • S(A);
    • Vars
      • B(a);N_GUARD::S(C),XB(a)
      • B(a);N_GUARD::S(C)
      • B(a);N_GUARD::QAR(D)+K(B)
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