MESON Chess Problem Database

Problem Display
PID: 85756 (8/1K4N1/1p6/2Pk4/8/2Q2p2/5N2/8 w - - 0 1)

Speckmann, Werner

Land og Folk, 1978

8/1K4N1/1p6/2Pk4/8/2Q2p2/5N2/8

#2

5 + 3

6490 yacpdb 2009
5454 Near Snap 2013

SOLUTION

  • SOUND
  • Tries
    • 1.Qd3+?
      • 1...Ke5
        • 2.Qd6#
      • 1...Kxc5!
    • 1.Qc4+?
      • 1...Ke5
        • 2.Sg4#
      • 1...Kxc4!
  • Keys
    • 1.Sg4!
      • threat
        • 2.Sf6#
      • 1...Ke4
        • 2.Qc4#
      • 1...bxc5
        • 2.Qd3#

Anticipated by 4714(1888), 28885(1956)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAB1(B)
      • Refutation
        • K(b);P-FLIGHT,XP(C)
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT::S(A)
      • Refutation
        • K(b);S_FLIGHT,XQ(B)
  • Actual
    • S(A);
    • Threat
      • S(A)
    • Vars
      • K(b);S_FLIGHT::QAR2(B)
      • P(c);SBLOCK,XP(C)::QAR2(B)
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