MESON Chess Problem Database

Problem Display
PID: 241488 (8/1KNQ1pr1/8/Npbp4/p2P3n/Prk1B3/np3R2/1B5b w - - 0 1)

Hjelle, David

Sachove umeni (Ceskoslovensky sach), 1970

8/1KNQ1pr1/8/Npbp4/p2P3n/Prk1B3/np3R2/1B5b

#2

9 + 12

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rg2
      • 2.Sxd5#
    • 1...Bb4
      • 2.Sxb5#
    • 1...Bxd4
      • 2.Bd2#
    • 1...Sb4
      • 2.Sxb5#
    • 1...Sg2
      • 2.Sxd5#
    • 1...Sf3
      • 2.Sxd5#
    • 1...b4
      • 2.Sb5#
  • Tries
    • 1.Qxb5?
      • threat
        • 2.Rc2#
      • 1...Rxb5+
        • 2.Sxb5#
      • 1...Rg2
        • 2.Sxd5#
      • 1...Sb4
        • 2.Qxc5#
      • 1...Be4!
  • Keys
    • 1.Qxd5!
      • threat
        • 2.Bd2#
      • 1...Bxd5+
        • 2.Sxd5#
      • 1...Sf3
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • R(l);S_CUTB(a)::S(H),XP(j)
    • B(i);S_CUTR(d)::S(H),XP(h)
    • B(i);SBLOCK,XP(E)::B(D)
    • S(b);S_CUTR(d)::S(H),XP(h)
    • S(g);S_CUTB(a)::S(H),XP(j)
    • P(h);S_CUTR(d)::S(H)
  • Tries
    • Try
      • Q(I);P_SPINQ(I),XP(h)
      • Threat
        • R1(B)
      • Vars
        • R(d);CHECK,XQ(I)::S(H),XR(d)
        • R(l);S_CUTB(a)::S(H),XP(j)
        • S(b);N_PINQ(I)::QAR2(I),XB(i)
      • Refutation
        • B(a);
  • Actual
    • Q(I);P_SPINQ(I),XP(j)
    • Threat
      • B(D)
    • Vars
      • B(a);CHECK,XQ(I)::S(H),XB(a)
      • S(g);N_PINQ(I)::QAR2(I),XB(i)
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