MESON Chess Problem Database

Problem Display
PID: 242265 (k7/P2p4/K3p3/3P4/6p1/6b1/8/2nQ4 w - - 0 1)

Kisis, Imants J

Schach, 1984

k7/P2p4/K3p3/3P4/6p1/6b1/8/2nQ4

#2

4 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...exd5
      • 2.Qxd5#
  • Tries
    • 1.dxe6?
      • threat
        • 2.Qd5#
      • 1...dxe6
        • 2.Qh1#
      • 1...d5
        • 2.Qxd5#
      • 1...Sd3!
    • 1.d6?
      • threat
        • 2.Qh1#
      • 1...e5
        • 2.Qd5#
      • 1...Be1!
  • Keys
    • 1.Qh1!
      • threat
        • 2.d6#
      • 1...exd5
        • 2.Qxd5#
      • 1...Bd6
        • 2.dxe6#
      • 1...e5
        • 2.Qh8#
      • 1...d6
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(d);OGATE,XP(B)::QAB(A),XP(d)
  • Tries
    • Try
      • P(B);XP(d)
      • Threat
        • QAB(A)
      • Vars
        • P(e);N_GUARD,XP(B)::QAB(A)
        • P(e);::QAB(A),XP(e)
      • Refutation
        • S(a);
    • Try
      • P(B);
      • Threat
        • QAB(A)
      • Vars
        • P(d);N_GUARD::QAB(A)
      • Refutation
        • B(b);
  • Actual
    • Q(A);
    • Threat
      • QAB(A)+P(B)
    • Vars
      • P(d);OGATE,P_SPINP(d),XP(B)::QAB(A),XP(d)
      • B(b);S_CUTP(e)::QAB(A)+P(B),XP(d)
      • P(d);S_CUTB(b)::QAB1(A)
      • P(e);S_CUTB(b)::QAB1(A)
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