MESON Chess Problem Database

Problem Display
PID: 71560 (4Q1nn/5NkN/8/2b3PK/4B3/8/8/8 w - - 0 1)

Ceder, Sven Ture

Mattforforelse Problem, 1942

4Q1nn/5NkN/8/2b3PK/4B3/8/8/8

#2

6 + 4

3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Bg1
      • 2.Qf8#
    • 1...Bf2
      • 2.Qf8#
    • 1...Be3
      • 2.Qf8#
    • 1...Bd4
      • 2.Qf8#
    • 1...Bb6
      • 2.Qf8#
    • 1...Ba7
      • 2.Qf8#
    • 1...Bf8
      • 2.Qxf8#
    • 1...Sf6+
      • 2.gxf6#
    • 1...Sh6
      • 2.gxh6#
    • 1...Se7
      • 2.Qf8#
  • Tries
    • 1.Qe5+?
      • 1...Kxf7
        • 2.Bd5#
      • 1...Sf6+!
  • Keys
    • 1.Sh6!
      • threat
        • 2.Qxg8#
      • 1...Sf6+
        • 2.gxf6#
      • 1...Sxh6
        • 2.gxh6#
      • 1...Bf8
        • 2.Qxf8#
      • 1...Se7
        • 2.Qf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 6
  • Sets
    • B(a);N_GUARD::QAB1(F)
    • B(a);N_GUARD::QAB1(F),XB(a)
    • S(c);CHECK,OGATE::P(B),XS(c)
    • S(c);OGATE::P(B),XS(c)
    • S(c);S_CUTB(a)::QAB1(F)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);P-FLIGHT,XS(D)::B(A)
      • Refutation
        • S(c);CHECK,P_SPINS(c)
  • Actual
    • S(D);
    • Threat
      • QAR1(F),XS(c)
    • Vars
      • S(c);CHECK,OGATE::P(B),XS(c)
      • S(c);OGATE,XS(D)::P(B),XS(c)
      • B(a);N_GUARD::QAB1(F),XB(a)
      • S(c);S_CUTB(a)::QAB1(F)
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