MESON Chess Problem Database

Problem Display
PID: 19140 (8/3pQ3/3Pn3/5p2/2PBk3/2P5/4K3/8 w - - 0 1)

Persson, Hol Holger

Stockholms Tidningen, 1932

8/3pQ3/3Pn3/5p2/2PBk3/2P5/4K3/8

#2

6 + 4

14869 British Championship Solving Ty. 2011
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Qh4#
    • 1...f4
      • 2.Qh7#
  • Tries
    • 1.Kf2?
      • 1...Kf4
        • 2.Qh4#
      • 1...f4
        • 2.Qh7#
      • 1...Kd3!
    • 1.Bf6?
      • 1...f4
        • 2.Qh7#
      • 1...Kf4!
    • 1.Bg7?
      • 1...Kf4
        • 2.Qh4#
      • 1...f4!
    • 1.Qh4+?
      • 1...f4
        • 2.Qh7#
      • 1...Sf4+!
    • 1.Qf6?
      • threat
        • 2.Qe5#
      • 1...Sxd4+
        • 2.Qxd4#
      • 1...Kf4
        • 2.Qh4#
      • 1...Sf4+!
    • 1.Qe8?
      • 1...f4
        • 2.Qg6#
      • 1...Kf4!
  • Keys
    • 1.Bh8!
      • 1...Kf4
        • 2.Qh4#
      • 1...f4
        • 2.Qh7#

This anticipates 243828(1987)

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(a);N_SPINS(c),P-FLIGHT::QAR2(F)
    • P(b);OGATEB,SBLOCK::QAB(F)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(a);N_SPINS(c),P-FLIGHT::QAR2(F)
        • P(b);OGATEB,SBLOCK::QAB(F)
      • Refutation
        • K(a);N_SPINS(c),S_FLIGHT
    • Try
      • B(D);
      • Vars
        • P(b);OGATEB,SBLOCK::QAB(F)
      • Refutation
        • K(a);N_SPINS(c),P-FLIGHT
    • Try
      • B(D);
      • Vars
        • K(a);N_SPINS(c),P-FLIGHT::QAR2(F)
      • Refutation
        • P(b);
    • Try
      • Q(F);CHECK,N_PINS(c)
      • Vars
        • P(b);OGATEB,P_SPINP(b),SBLOCK::QAB(F)
      • Refutation
        • S(c);CHECK,P_SPINS(c)
    • Try
      • Q(F);N_PINS(c)
      • Threat
        • QAR1(F)
      • Vars
        • S(c);CHECK,OGATE,XB(D)::QAR1(F),XS(c)
        • K(a);P-FLIGHT,P_SPINP(b)::QAR2(F)
      • Refutation
        • S(c);CHECK
    • Try
      • Q(F);
      • Vars
        • P(b);OGATEB,SBLOCK::QAB(F)
      • Refutation
        • K(a);N_SPINS(c),P-FLIGHT
  • Actual
    • B(D);
    • Vars
      • K(a);N_SPINS(c),P-FLIGHT::QAR2(F)
      • P(b);OGATEB,SBLOCK::QAB(F)
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