MESON Chess Problem Database

Problem Display
PID: 120608 (2b2r2/K3nnB1/1Np3Q1/2p2P1R/Rb1pk1N1/6P1/B1P3P1/8 w - - 0 1)

Hjelle, David

Sinfonie Scacchistiche, 1976

2b2r2/K3nnB1/1Np3Q1/2p2P1R/Rb1pk1N1/6P1/B1P3P1/8

#2

12 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sxf5
      • 2.Qxc6#
    • 1...Sg8
      • 2.Qxc6#
  • Tries
    • 1.Sf6+?
      • 1...Ke5
        • 2.Sc4#
      • 1...Ke3!
    • 1.Qg5?
      • threat
        • 2.Sf2#
        • 2.Qf4#
      • 1...Be1
        • 2.Qe3#
        • 2.Qf4#
      • 1...Bd2
        • 2.Sf2#
      • 1...Sd5
        • 2.Sf2#
      • 1...Sg6
        • 2.Sf2#
      • 1...Sxg5!
    • 1.Qxc6+?
      • 1...Sd5
        • 2.Bxd5#
        • 2.Qxd5#
      • 1...Sxc6+!
    • 1.Qe6+?
      • 1...Se5
        • 2.Qxe5#
      • 1...Bxe6!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Sf6#
      • 1...Kd5
        • 2.Sf6#
      • 1...Sd5
        • 2.Sf2#
      • 1...Sg8
        • 2.Qxc6#
      • 1...Se5
        • 2.Sd6#
      • 1...Sg5
        • 2.Sd6#
      • 1...Sd6
        • 2.Sxd6#
      • 1...Sh6
        • 2.Sd6#
      • 1...Sd8
        • 2.Sd6#
      • 1...Sh8
        • 2.Sd6#
      • 1...d3
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 1
  • Sets
    • S(f);N_GUARD,P_SPINS(f),XP(G)::QAB(J),XP(e)
    • S(f);N_GUARD::QAB(J),XP(e)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(c);P-FLIGHT::S(I)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(J);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);P_SPINP(b)::S(F)
        • S(f);::S(F)
      • Refutation
        • S(g);XQ(J)
    • Try
      • Q(J);CHECK,XP(e)
      • Refutation
        • S(f);CHECK,XQ(J)
    • Try
      • Q(J);CHECK
      • Vars
        • S(g);N_GUARD,P_SPINS(g)::QAR1(J),XS(g)
      • Refutation
        • B(h);XQ(J)
  • Actual
    • S(I);
    • Threat
      • S(F)
    • Vars
      • K(c);S_FLIGHT::S(F)
      • S(f);SBLOCK::S(F)
      • S(f);N_GUARD::QAB(J),XP(e)
      • S(g);N_GUARD::S(I)
      • S(g);N_GUARD::S(I),XS(g)
      • P(b);S_CUTB(a)::S(I)
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