MESON Chess Problem Database

Problem Display
PID: 161420 (2nN3b/5p1q/1n1p2B1/Np1k4/3P1R1r/7p/3B3K/Q4b2 w - - 0 1)

Pitkanen, Jorma

Comm., Mariani-50 JT, 2011

2nN3b/5p1q/1n1p2B1/Np1k4/3P1R1r/7p/3B3K/Q4b2

#2

8 + 11

4901 Best Problems 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Qg8
      • 2.Be4#
    • 1...Qh5
      • 2.Be4#
    • 1...Qh6
      • 2.Be4#
    • 1...Qg7
      • 2.Be4#
    • 1...Bc4
      • 2.Qh1#
    • 1...Bxd4
      • 2.Qxd4#
    • 1...Bg7
      • 2.Bxf7#
  • Tries
    • 1.Qc3?
      • threat
        • 2.Qf3#
        • 2.Qc6#
      • 1...Qxg6
        • 2.Qc6#
      • 1...Bxd4
        • 2.Qxd4#
      • 1...Qh5
        • 2.Be4#
        • 2.Qc6#
      • 1...Be2
        • 2.Qc6#
      • 1...Bg2
        • 2.Qc6#
      • 1...Bd3
        • 2.Qc6#
      • 1...Bc4
        • 2.Qf3#
      • 1...Sc4
        • 2.Qf3#
      • 1...Sa7
        • 2.Qf3#
      • 1...Se7
        • 2.Qf3#
      • 1...Rxf4!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Se3#
      • 1...Kxc4
        • 2.Qa2#
      • 1...Bxc4
        • 2.Qh1#
      • 1...Bxd4
        • 2.Qxd4#
      • 1...Sxc4
        • 2.Qa8#
      • 1...bxc4
        • 2.Qa5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • Q(i);N_GUARD::B(G)
    • B(a);OGATE::QAB(A)
    • B(k);OGATE,XP(D)::QAR1(A),XB(k)
    • B(k);S_CUTQ(i)::B(G),XP(h)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(i);XB(G)::QAB1(A)
        • B(k);OGATE,XP(D)::QAR1(A),XB(k)
        • B(a);::QAB1(A)
        • B(a);::QAB(A)
        • S(f);::QAB(A)
        • S(j);::QAB(A)
      • Refutation
        • R(c);XR(E)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • K(e);OGATEB,S_FLIGHT,XS(F)::QAB(A)
      • B(a);OGATE,SBLOCK,XS(F)::QAB(A)
      • B(k);OGATE,XP(D)::QAR1(A),XB(k)
      • S(f);N_GUARD,SBLOCK,XS(F)::QAB(A)
      • P(d);OGATEB,SBLOCK,XS(F)::QAR(A)
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