MESON Chess Problem Database

Problem Display
PID: 181166 (2QnN1Bq/8/5n2/3r1N1P/4kPp1/8/2P5/5RK1 w - - 0 1)

Hellstrom, Ake

Pesti Hirlap, 1904

2QnN1Bq/8/5n2/3r1N1P/4kPp1/8/2P5/5RK1

#2

9 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxh5
      • 2.Sxf6#
    • 1...Qh7
      • 2.Sxf6#
    • 1...Qxg8
      • 2.Sxf6#
    • 1...Ra5
      • 2.Sed6#
    • 1...Rb5
      • 2.Sed6#
    • 1...Rc5
      • 2.Sed6#
    • 1...Re5
      • 2.Sed6#
    • 1...Rd6
      • 2.Sexd6#
  • Tries
    • 1.Bxd5+?
      • 1...Sxd5
        • 2.Sed6#
      • 1...Kxd5!
    • 1.Qe6+?
      • 1...Re5
        • 2.Sed6#
        • 2.Qxe5#
      • 1...Sxe6!
    • 1.Qc4+?
      • 1...Rd4
        • 2.Sed6#
      • 1...Kxf5!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Sg3#
      • 1...Kxf5
        • 2.Sd6#
      • 1...Rxc5
        • 2.Sed6#
      • 1...Rxf5
        • 2.Sd6#
      • 1...Sxh5
        • 2.Qxd5#
      • 1...Rd3
        • 2.Qe5#
      • 1...Rd4
        • 2.Qe5#
      • 1...g3
        • 2.Sxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 7
  • Sets
    • Q(f);N_GUARD,XP(F)::S(H),XS(d)
    • Q(f);N_GUARD::S(H),XS(d)
    • Q(f);N_GUARD,XB(I)::S(H),XS(d)
    • R(c);N_GUARD::S(H)
    • R(c);N_GUARD::S(H),XR(c)
  • Tries
    • Try
      • B(I);CHECK,XR(c)
      • Vars
        • S(d);SBLOCK,XB(I)::S(H)
      • Refutation
        • K(a);S_FLIGHT,XB(I)
    • Try
      • Q(G);CHECK
      • Refutation
        • S(e);XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • R(c);P_SPINR(c)::S(H)
      • Refutation
        • K(a);S_FLIGHT,XS(E)
  • Actual
    • Q(G);
    • Threat
      • S(E)
    • Vars
      • K(a);P_SPINR(c),S_FLIGHT,XS(E)::S(H)
      • R(c);N_GUARD,XQ(G)::S(H)
      • R(c);N_GUARD,XS(E)::S(H)
      • S(d);N_GUARD,XP(F)::QAB1(G),XR(c)
      • R(c);OGATE::QAR1(G)
      • P(b);::S(E),XP(b)
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